Iranian Polymer Journal最新文献_第8页

Synthesis of a preformed hydrogel based on polyacrylamide and related gel-breakers with potential application for conformance control 基于聚丙烯酰胺和相关破凝胶剂的预成型水凝胶的合成及其在一致性控制中的潜在应用

IF 2.4 3区化学 Q3 POLYMER SCIENCE

Iranian Polymer Journal

Pub Date : 2024-06-04 DOI: 10.1007/s13726-024-01336-3

A. B. Pereira Kaio, F. Oliveira Priscila, T. Batista Beatriz, R. E. Mansur Claudia

In oil recovery processes, fluids injected to increase oil production may find preferential paths or fractured rocks that offer less resistance to passage through the reservoir, leaving many areas of the reservoir without being swept and consequently reducing the oil recovery efficiency, increasing water production compared to oil production. Conformance control technique can be applied to avoid these problems and then redirect the injected fluids to the segments that were previously not being reached. The preformed particle gels (PPG) have been evaluated for this application, which were obtained from precursor hydrogels and injected into oil reservoirs in the form of brine suspensions. In this study, an evaluation was conducted on the thermal, rheological, morphological, stability, and swelling properties of partially hydrolyzed polyacrylamide (PHPA) crosslinked with polyethyleneimine (PEI) PPG. Another study of this work was the evaluation of gel-breaker systems based on ammonium persulfate and sodium hypochlorite, which can be used to solve eventual operational problems arising from obstructions in the PPG application. The results indicated that the optimal chemical composition of the precursors consisted of 1.0% partially hydrolyzed polyacrylamide (PHPA) crosslinked with 3.0% polyethyleneimine (PEI). This combination exhibited higher material strength and swelling capacity, exceeding 20 times its initial mass. The ammonium persulphate proved to be a powerful gel-breaker, causing reductions in elastic modulus by as much as 97%, alongside causing structural damage that was confirmed by scanning electron microscopy (SEM).

Graphical abstract

在采油过程中，为提高产油量而注入的流体可能会在油藏中找到阻力较小的优先路径或断裂岩石，从而使油藏中的许多区域没有被扫过，从而降低了采油效率，使产水量高于产油量。可以采用一致性控制技术来避免这些问题，然后将注入的流体重新导向之前未到达的区段。针对这一应用评估了预成型颗粒凝胶（PPG），这种凝胶是从前体水凝胶中提取的，以盐水悬浮液的形式注入油藏。在这项研究中，对与聚乙烯亚胺（PEI）交联的部分水解聚丙烯酰胺（PHPA）PPG 的热、流变、形态、稳定性和膨胀特性进行了评估。这项工作的另一项研究是评估基于过硫酸铵和次氯酸钠的凝胶破坏系统，该系统可用于解决 PPG 应用中因障碍物而产生的最终操作问题。结果表明，前体的最佳化学成分包括 1.0% 的部分水解聚丙烯酰胺（PHPA）与 3.0% 的聚乙烯亚胺（PEI）交联。这种组合显示出更高的材料强度和膨胀能力，超过其初始质量的 20 倍。过硫酸铵被证明是一种强大的凝胶破坏剂，可使弹性模量降低多达 97%，同时造成结构破坏，扫描电子显微镜（SEM）证实了这一点。

{"title":"Synthesis of a preformed hydrogel based on polyacrylamide and related gel-breakers with potential application for conformance control","authors":"A. B. Pereira Kaio, F. Oliveira Priscila, T. Batista Beatriz, R. E. Mansur Claudia","doi":"10.1007/s13726-024-01336-3","DOIUrl":"10.1007/s13726-024-01336-3","url":null,"abstract":"<div><p>In oil recovery processes, fluids injected to increase oil production may find preferential paths or fractured rocks that offer less resistance to passage through the reservoir, leaving many areas of the reservoir without being swept and consequently reducing the oil recovery efficiency, increasing water production compared to oil production. Conformance control technique can be applied to avoid these problems and then redirect the injected fluids to the segments that were previously not being reached. The preformed particle gels (PPG) have been evaluated for this application, which were obtained from precursor hydrogels and injected into oil reservoirs in the form of brine suspensions. In this study, an evaluation was conducted on the thermal, rheological, morphological, stability, and swelling properties of partially hydrolyzed polyacrylamide (PHPA) crosslinked with polyethyleneimine (PEI) PPG. Another study of this work was the evaluation of gel-breaker systems based on ammonium persulfate and sodium hypochlorite, which can be used to solve eventual operational problems arising from obstructions in the PPG application. The results indicated that the optimal chemical composition of the precursors consisted of 1.0% partially hydrolyzed polyacrylamide (PHPA) crosslinked with 3.0% polyethyleneimine (PEI). This combination exhibited higher material strength and swelling capacity, exceeding 20 times its initial mass. The ammonium persulphate proved to be a powerful gel-breaker, causing reductions in elastic modulus by as much as 97%, alongside causing structural damage that was confirmed by scanning electron microscopy (SEM).</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 11","pages":"1583 - 1595"},"PeriodicalIF":2.4,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141253448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effect of process variables on near-field electrospinning of polycaprolactone studied by response surface methodology 用响应面方法研究工艺变量对聚己内酯近场电纺丝的影响

IF 2.4 3区化学 Q3 POLYMER SCIENCE

Iranian Polymer Journal

Pub Date : 2024-06-01 DOI: 10.1007/s13726-024-01339-0

Ali Reza Khodabandeh, Ali Akbar Yousefi, Ebrahim Vasheghani-Farahani

Near-field electrospinning (NFES) is a unique method of additive manufacturing (AM) that combines features from conventional electrospinning (CES) and direct ink writing (DIW). NFES allows for the production of nano/micro-scale fibers, similar to CES, while also enabling the creation of fibers and regular structures like DIW. This unique combination sets NFES apart from other AM methods, offering advantages such as low cost, high resolution, compatibility with various materials, and reproducibility. As a result of these properties, NFES has found applications in diverse fields, including tissue engineering, sensors, and electronics. In this study, for a better structural design of the fibrous polycaprolactone construct, the surface response methodology (RSM) was used to study the effect of process variables such as polymer concentration, flow rate, voltage, distance, and collector speed on fiber diameter. The relationship between these parameters and fiber diameter was analyzed. The collector speed was found to have the most influence on fiber diameter, while voltage had the least effect. A statistical model was developed to describe the interactions between these parameters and fiber diameter, validated through experimental tests. The model accurately predicted fiber diameter with less than 16% difference and can be applied to fabricate fibrous constructs by NFES.

Graphical abstract

近场电纺丝（NFES）是一种独特的增材制造（AM）方法，它结合了传统电纺丝（CES）和直接墨水写入（DIW）的特点。NFES 可以生产纳米级/微米级纤维，与 CES 相似，同时还能像 DIW 一样制造纤维和规则结构。这种独特的组合使 NFES 有别于其他 AM 方法，具有成本低、分辨率高、与各种材料兼容和可重复性强等优点。由于这些特性，NFES 已在组织工程、传感器和电子学等多个领域得到应用。在本研究中，为了更好地设计纤维状聚己内酯结构，采用了表面响应法（RSM）来研究聚合物浓度、流速、电压、距离和收集器速度等工艺变量对纤维直径的影响。分析了这些参数与纤维直径之间的关系。结果发现，收集器速度对纤维直径的影响最大，而电压的影响最小。建立了一个统计模型来描述这些参数与纤维直径之间的相互作用，并通过实验测试进行了验证。该模型准确预测了纤维直径，差值小于 16%，可用于通过 NFES 制造纤维结构。

{"title":"The effect of process variables on near-field electrospinning of polycaprolactone studied by response surface methodology","authors":"Ali Reza Khodabandeh, Ali Akbar Yousefi, Ebrahim Vasheghani-Farahani","doi":"10.1007/s13726-024-01339-0","DOIUrl":"10.1007/s13726-024-01339-0","url":null,"abstract":"<div><p>Near-field electrospinning (NFES) is a unique method of additive manufacturing (AM) that combines features from conventional electrospinning (CES) and direct ink writing (DIW). NFES allows for the production of nano/micro-scale fibers, similar to CES, while also enabling the creation of fibers and regular structures like DIW. This unique combination sets NFES apart from other AM methods, offering advantages such as low cost, high resolution, compatibility with various materials, and reproducibility. As a result of these properties, NFES has found applications in diverse fields, including tissue engineering, sensors, and electronics. In this study, for a better structural design of the fibrous polycaprolactone construct, the surface response methodology (RSM) was used to study the effect of process variables such as polymer concentration, flow rate, voltage, distance, and collector speed on fiber diameter. The relationship between these parameters and fiber diameter was analyzed. The collector speed was found to have the most influence on fiber diameter, while voltage had the least effect. A statistical model was developed to describe the interactions between these parameters and fiber diameter, validated through experimental tests. The model accurately predicted fiber diameter with less than 16% difference and can be applied to fabricate fibrous constructs by NFES.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 11","pages":"1569 - 1581"},"PeriodicalIF":2.4,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141197112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Permeability and mechanical properties of nanoclay/epoxy liner used in type IV liquid oxygen vessel: experimental and numerical study 用于 IV 型液氧容器的纳米粘土/环氧衬垫的渗透性和机械性能：实验和数值研究

IF 2.4 3区化学 Q3 POLYMER SCIENCE

Iranian Polymer Journal

Pub Date : 2024-06-01 DOI: 10.1007/s13726-024-01324-7

Amirreza Ardebili, Mohammad Hossein Alaei, Amir Kaveh, Jafar Eskandari Jam

Consideration of the permeability and safety aspects of liquid oxygen (LOX) storage is of particular importance, because oxygen leaks can break down spacecraft missions. In this study, the effect of adding nanoclay to epoxy resin on the bending and tensile capacities of a clay/epoxy nanocomposite for using as a liner in type IV LOX was investigated experimentally and statistically. Consequently, samples were initially made with different nanoclay contents (0.5%, 1%, 3%, and 5% all by weights) using two distinct dispersion processes (HSS and ultrasonic), then evaluated using bending, tensile, and permeability testing methods, as well as scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffractometry (XRD). In the optimal sample with 1% (weight) of nanoclay mixed with ultrasonic process, the permeability was reduced by 35%, the Young's modulus was improved by 3.5 times, and the toughness and fracture energy were increased by 3 times compared to the pure resin. However, all samples lost between 10 and 20% of their tensile strength due to the breakage of polymer chain links. Simulation findings revealed that at burst pressure, the tank with modified resin liner deforms four times less than PP and 50% more than PET without any rupture.

Graphical abstract

考虑液氧（LOX）储存的渗透性和安全问题尤为重要，因为氧气泄漏会导致航天器任务失败。在本研究中，通过实验和统计学方法研究了在环氧树脂中添加纳米粘土对粘土/环氧纳米复合材料弯曲和拉伸能力的影响，该复合材料可用作 IV 型液氧衬垫。因此，首先使用两种不同的分散工艺（高速钢和超声波）制作了不同纳米含量（按重量计分别为 0.5%、1%、3% 和 5%）的样品，然后使用弯曲、拉伸和渗透测试方法以及扫描电子显微镜（SEM）、透射电子显微镜（TEM）和 X 射线衍射仪（XRD）进行了评估。与纯树脂相比，在超声波工艺中混合 1%（重量）纳米粘土的最佳样品的渗透性降低了 35%，杨氏模量提高了 3.5 倍，韧性和断裂能提高了 3 倍。然而，由于聚合物链节断裂，所有样品的拉伸强度都下降了 10% 到 20%。模拟结果表明，在爆破压力下，改性树脂内衬储罐的变形比聚丙烯小四倍，比 PET 大 50%，且不会发生任何破裂。

{"title":"Permeability and mechanical properties of nanoclay/epoxy liner used in type IV liquid oxygen vessel: experimental and numerical study","authors":"Amirreza Ardebili, Mohammad Hossein Alaei, Amir Kaveh, Jafar Eskandari Jam","doi":"10.1007/s13726-024-01324-7","DOIUrl":"10.1007/s13726-024-01324-7","url":null,"abstract":"<div><p>Consideration of the permeability and safety aspects of liquid oxygen (LOX) storage is of particular importance, because oxygen leaks can break down spacecraft missions. In this study, the effect of adding nanoclay to epoxy resin on the bending and tensile capacities of a clay/epoxy nanocomposite for using as a liner in type IV LOX was investigated experimentally and statistically. Consequently, samples were initially made with different nanoclay contents (0.5%, 1%, 3%, and 5% all by weights) using two distinct dispersion processes (HSS and ultrasonic), then evaluated using bending, tensile, and permeability testing methods, as well as scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffractometry (XRD). In the optimal sample with 1% (weight) of nanoclay mixed with ultrasonic process, the permeability was reduced by 35%, the Young's modulus was improved by 3.5 times, and the toughness and fracture energy were increased by 3 times compared to the pure resin. However, all samples lost between 10 and 20% of their tensile strength due to the breakage of polymer chain links. Simulation findings revealed that at burst pressure, the tank with modified resin liner deforms four times less than PP and 50% more than PET without any rupture.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 10","pages":"1351 - 1367"},"PeriodicalIF":2.4,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141196969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A review of pullulan nanopolymer derived from agro-food waste and its applications 综述从农业食品废弃物中提取的纤维素纳米聚合物及其应用

IF 2.4 3区化学 Q3 POLYMER SCIENCE

Iranian Polymer Journal

Pub Date : 2024-05-31 DOI: 10.1007/s13726-024-01338-1

Richa Prasad Mahato, Saurabh Kumar

Pullulan is a microbial exopolysaccharide hydrogel biopolymer that is biodegradable, renewable, and environmentally friendly. However, to meet the demands of the utilization, it is still necessary to enhance the yield and molecular characteristics of pullulan formed by different strains. Available in powder form, pullulan enhances the benefits of this natural material when combined with nanoparticles (NPs) and synthesized into pullulan NPs. NPs are gaining attention as a cutting-edge technology in the fields of pharmaceuticals, medicine, food, agriculture processing, and packaging. Pullulan biopolymers provide an environmentally friendly solution that effectively addresses the world's waste disposal issue by removing untreated waste from the agro-food industries and using this waste as a potential substrate for pullulan biosynthesis. Nowadays, pullulan in the form of NPs, nanocomposites, and nanoformulation has become increasingly popular because of their specific application needs with enhanced molecular properties like strength, durability, electrical conductivity, and catalytic activity. This approach offers a valuable product called pullulan-based nanopolymer, which holds promise in various industries. Pullulan with the highest yield capacity to date has the potential to significantly decrease production costs and increase applicability range. This review provides detailed insights into the latest methods for extracting pullulan biopolymers from agricultural and food waste materials in the form of polysaccharides. Moreover, the article covers the synthesis of various types of pullulan-based nanoparticles, nanocomposites, and nanoformulations. Furthermore, it delves into the diverse applications of these pullulan nanopolymers across agriculture, food and medical sectors.

Graphical abstract

普鲁兰是一种微生物外多糖水凝胶生物聚合物，具有生物降解性、可再生性和环保性。然而，为了满足利用需求，仍有必要提高不同菌株形成的普鲁兰的产量和分子特性。拉鲁兰以粉末形式存在，当与纳米颗粒（NPs）结合并合成为拉鲁兰 NPs 时，可提高这种天然材料的效益。作为制药、医药、食品、农业加工和包装领域的尖端技术，纳米粒子正日益受到关注。拉普兰生物聚合物提供了一种环境友好型解决方案，通过清除农业食品工业中未经处理的废物，并利用这些废物作为拉普兰生物合成的潜在底物，有效解决了世界废物处理问题。如今，由于其特定的应用需求，以 NPs、纳米复合材料和纳米制剂形式存在的具有增强的分子特性（如强度、耐久性、导电性和催化活性）的拉胶已变得越来越受欢迎。这种方法提供了一种名为 "基于普鲁兰的纳米聚合物 "的宝贵产品，在各行各业中大有可为。迄今为止产量最高的普鲁兰具有显著降低生产成本和扩大应用范围的潜力。本综述详细介绍了以多糖形式从农业和食品废料中提取拉普兰生物聚合物的最新方法。此外，文章还介绍了各种类型的基于拉普兰的纳米颗粒、纳米复合材料和纳米制剂的合成。此外，文章还深入探讨了这些拉普兰纳米聚合物在农业、食品和医疗领域的各种应用。

{"title":"A review of pullulan nanopolymer derived from agro-food waste and its applications","authors":"Richa Prasad Mahato, Saurabh Kumar","doi":"10.1007/s13726-024-01338-1","DOIUrl":"10.1007/s13726-024-01338-1","url":null,"abstract":"<div><p>Pullulan is a microbial exopolysaccharide hydrogel biopolymer that is biodegradable, renewable, and environmentally friendly. However, to meet the demands of the utilization, it is still necessary to enhance the yield and molecular characteristics of pullulan formed by different strains. Available in powder form, pullulan enhances the benefits of this natural material when combined with nanoparticles (NPs) and synthesized into pullulan NPs. NPs are gaining attention as a cutting-edge technology in the fields of pharmaceuticals, medicine, food, agriculture processing, and packaging. Pullulan biopolymers provide an environmentally friendly solution that effectively addresses the world's waste disposal issue by removing untreated waste from the agro-food industries and using this waste as a potential substrate for pullulan biosynthesis. Nowadays, pullulan in the form of NPs, nanocomposites, and nanoformulation has become increasingly popular because of their specific application needs with enhanced molecular properties like strength, durability, electrical conductivity, and catalytic activity. This approach offers a valuable product called pullulan-based nanopolymer, which holds promise in various industries. Pullulan with the highest yield capacity to date has the potential to significantly decrease production costs and increase applicability range. This review provides detailed insights into the latest methods for extracting pullulan biopolymers from agricultural and food waste materials in the form of polysaccharides. Moreover, the article covers the synthesis of various types of pullulan-based nanoparticles, nanocomposites, and nanoformulations. Furthermore, it delves into the diverse applications of these pullulan nanopolymers across agriculture, food and medical sectors.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 10","pages":"1493 - 1526"},"PeriodicalIF":2.4,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141196974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A facile and green pre-dispersion method for the preparation of epoxide-functionalized natural rubber/silica nanocomposites with improved mechanical properties 制备具有更好机械性能的环氧功能化天然橡胶/二氧化硅纳米复合材料的简便绿色预分散方法

IF 2.4 3区化学 Q3 POLYMER SCIENCE

Iranian Polymer Journal

Pub Date : 2024-05-31 DOI: 10.1007/s13726-024-01335-4

Dalip Abdulraman, Tinnakorn Tiensing, Pranee Phinyocheep

Good dispersion of silica filler in the rubber matrix is a key factor for the high-performance properties of rubber/silica nanocomposites. This work aimed at using mild and green conditions for incorporating high silica content in natural rubber (NR) without using a silane coupling agent. The NR latex was modified into a low degree (5%) of epoxide-functionalized NR, symbolized as ENR5 by epoxidation reaction. The silica (40 phr) was pre-dispersed in water using ultrasonication to break down the silica particles, symbolized as USiP before mixing in the obtained ENR5 latex. After water evaporation, no silica flocculation at the bottom of the container was observed, meaning that silica was well infiltrated in the rubber matrix without coagulating agents. The interaction of hydroxyl groups of silica with epoxide groups of ENR5 could support the stable dispersion of the silica in the rubber matrix. Then, the dried ENR5-USiP was further mixed with curing agents in a two-roll mill. The cure characteristic, morphology and mechanical properties of ENR5-USiP were compared with silica-filled NR using a conventional mixing process (NR-SiC) and NR filled with silica treated by a silane coupling agent (NR-SSiC). As a result, ENR5-USiP exhibited higher mechanical properties than NR-SiC and NR-SSiC. The SEM micrograph revealed the good dispersion of nano-size silica in the rubber matrix of ENR5-USiP composites. It can be highlighted that the breakage of silica particles by ultrasonication is a facile method and mixing of the obtained silica in the ENR5 latex is a green condition. Furthermore, the possible interaction between the silanol groups of silica and epoxide functional groups of ENR5 could play an important role in improving the mechanical properties of the silica-filled rubber composites without requiring a silane coupling agent.

Graphical Abstract

白炭黑填料在橡胶基体中的良好分散性是橡胶/白炭黑纳米复合材料实现高性能的关键因素。本研究旨在利用温和、绿色的条件，在不使用硅烷偶联剂的情况下，在天然橡胶（NR）中加入高含量的二氧化硅。通过环氧化反应，将天然橡胶胶乳改性为低浓度（5%）的环氧化功能化天然橡胶，代号为 ENR5。在将二氧化硅（40 phr）混入得到的 ENR5 胶乳之前，先用超声波将二氧化硅（40 phr）分散在水中，以分解二氧化硅颗粒（符号为 USiP）。水蒸发后，容器底部没有观察到白炭黑絮凝现象，这意味着白炭黑在没有凝结剂的情况下很好地渗入了橡胶基质。白炭黑的羟基与 ENR5 的环氧基团相互作用，支持了白炭黑在橡胶基质中的稳定分散。然后，在双辊研磨机中将干燥的 ENR5-USiP 与固化剂进一步混合。将 ENR5-USiP 的固化特性、形态和机械性能与采用传统混合工艺的二氧化硅填充 NR（NR-SiC）和经硅烷偶联剂处理的二氧化硅填充 NR（NR-SiC）进行了比较。结果表明，ENR5-USiP 的机械性能高于 NR-SiC 和 NR-SiC。SEM 显微照片显示，纳米二氧化硅在 ENR5-USiP 复合材料的橡胶基体中分散良好。可以看出，用超声波破碎白炭黑颗粒是一种简便的方法，将获得的白炭黑混入 ENR5 胶乳是一种绿色环保的方法。此外，白炭黑的硅烷醇基团与ENR5的环氧官能团之间可能存在的相互作用可在改善白炭黑填充橡胶复合材料的机械性能方面发挥重要作用，而无需使用硅烷偶联剂。

{"title":"A facile and green pre-dispersion method for the preparation of epoxide-functionalized natural rubber/silica nanocomposites with improved mechanical properties","authors":"Dalip Abdulraman, Tinnakorn Tiensing, Pranee Phinyocheep","doi":"10.1007/s13726-024-01335-4","DOIUrl":"10.1007/s13726-024-01335-4","url":null,"abstract":"<div><p>Good dispersion of silica filler in the rubber matrix is a key factor for the high-performance properties of rubber/silica nanocomposites. This work aimed at using mild and green conditions for incorporating high silica content in natural rubber (NR) without using a silane coupling agent. The NR latex was modified into a low degree (5%) of epoxide-functionalized NR, symbolized as ENR5 by epoxidation reaction. The silica (40 phr) was pre-dispersed in water using ultrasonication to break down the silica particles, symbolized as USiP before mixing in the obtained ENR5 latex. After water evaporation, no silica flocculation at the bottom of the container was observed, meaning that silica was well infiltrated in the rubber matrix without coagulating agents. The interaction of hydroxyl groups of silica with epoxide groups of ENR5 could support the stable dispersion of the silica in the rubber matrix. Then, the dried ENR5-USiP was further mixed with curing agents in a two-roll mill. The cure characteristic, morphology and mechanical properties of ENR5-USiP were compared with silica-filled NR using a conventional mixing process (NR-SiC) and NR filled with silica treated by a silane coupling agent (NR-SSiC). As a result, ENR5-USiP exhibited higher mechanical properties than NR-SiC and NR-SSiC. The SEM micrograph revealed the good dispersion of nano-size silica in the rubber matrix of ENR5-USiP composites. It can be highlighted that the breakage of silica particles by ultrasonication is a facile method and mixing of the obtained silica in the ENR5 latex is a green condition. Furthermore, the possible interaction between the silanol groups of silica and epoxide functional groups of ENR5 could play an important role in improving the mechanical properties of the silica-filled rubber composites without requiring a silane coupling agent.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 11","pages":"1553 - 1567"},"PeriodicalIF":2.4,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141197139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photothermal efficiency of carbon nanotubes-embedded polysulfone membranes for direct contact membrane distillation 用于直接接触膜蒸馏的嵌入碳纳米管的聚砜膜的光热效率

IF 2.4 3区化学 Q3 POLYMER SCIENCE

Iranian Polymer Journal

Pub Date : 2024-05-31 DOI: 10.1007/s13726-024-01333-6

Ahmed M. Hameed, AbdulAziz A. Alayyafi, Ahmad A. Alluhaybi, Mohamed S. Fahmi, Mohamed E. A. Ali

Membrane distillation (MD) is a highly promising method for desalinating water with high salt content. However, a major challenge faced by this technology is its high energy consumption, which is caused by the need to heat up the saline feed solution. Hence, this study aimed to incorporate multi-walled carbon nanotubes (MWCNTs) into the polysulfone (PSF) matrix to fabricate composite photothermal MD membranes. These membranes have the capability to function independently without the need for an external energy source. Various quantities of MWCNTs ranging from 0.5 to 1.5% (by weight) were added to the PSF casting solution. This led to the creation of composite membranes with improved photothermal characteristics. The PSF and PSF/MWCNTs composite membranes were analyzed using scanning electron microscopy (SEM), FTIR spectroscopy, thermal gravimetric analysis, and contact angle measurements. The concentration of MWCNTs that yielded the highest photothermal efficiency was found to be 1% (by weight). The membranes were assessed using a photothermal membrane distillation (PMD) device, where the operational conditions and parameters were investigated. The presence of MWCNTs resulted in an increase in the surface temperature of the membrane to 67 °C when placed 10 cm away from a 200 W light source. In addition, the inclusion of MWCNTs led to a rise in the contact angle measurement from 80° to 112°, as well as an improvement in the liquid entry pressure (LEP) from 25.5 to 52 psi. Moreover, it significantly impacted the improvement of membrane production in the presence of light, while also exhibiting a high degree of operational efficiency.

Graphical Abstract

膜蒸馏（MD）是一种非常有前景的高盐分海水淡化方法。然而，该技术面临的一个主要挑战是能耗高，这是因为需要加热含盐进料溶液。因此，本研究旨在将多壁碳纳米管（MWCNTs）加入聚砜（PSF）基质中，以制造复合光热 MD 膜。这些膜无需外部能源即可独立运行。在 PSF 浇注溶液中添加了 0.5%至 1.5%（按重量计）的不同数量的 MWCNT。这样就制成了具有更好光热特性的复合膜。使用扫描电子显微镜（SEM）、傅里叶变换红外光谱、热重分析和接触角测量对 PSF 和 PSF/MWCNTs 复合膜进行了分析。结果发现，产生最高光热效率的 MWCNTs 浓度为 1%（按重量计）。使用光热膜蒸馏（PMD）装置对膜进行了评估，研究了操作条件和参数。当膜放置在距离 200 W 光源 10 厘米处时，MWCNT 的存在使膜的表面温度升高至 67 °C。此外，加入 MWCNTs 后，接触角测量值从 80° 上升到 112°，液体进入压力 (LEP) 从 25.5 psi 提高到 52 psi。此外，它还对改善光照下的膜生产产生了重大影响，同时还表现出很高的运行效率。

{"title":"Photothermal efficiency of carbon nanotubes-embedded polysulfone membranes for direct contact membrane distillation","authors":"Ahmed M. Hameed, AbdulAziz A. Alayyafi, Ahmad A. Alluhaybi, Mohamed S. Fahmi, Mohamed E. A. Ali","doi":"10.1007/s13726-024-01333-6","DOIUrl":"10.1007/s13726-024-01333-6","url":null,"abstract":"<div><p>Membrane distillation (MD) is a highly promising method for desalinating water with high salt content. However, a major challenge faced by this technology is its high energy consumption, which is caused by the need to heat up the saline feed solution. Hence, this study aimed to incorporate multi-walled carbon nanotubes (MWCNTs) into the polysulfone (PSF) matrix to fabricate composite photothermal MD membranes. These membranes have the capability to function independently without the need for an external energy source. Various quantities of MWCNTs ranging from 0.5 to 1.5% (by weight) were added to the PSF casting solution. This led to the creation of composite membranes with improved photothermal characteristics. The PSF and PSF/MWCNTs composite membranes were analyzed using scanning electron microscopy (SEM), FTIR spectroscopy, thermal gravimetric analysis, and contact angle measurements. The concentration of MWCNTs that yielded the highest photothermal efficiency was found to be 1% (by weight). The membranes were assessed using a photothermal membrane distillation (PMD) device, where the operational conditions and parameters were investigated. The presence of MWCNTs resulted in an increase in the surface temperature of the membrane to 67 °C when placed 10 cm away from a 200 W light source. In addition, the inclusion of MWCNTs led to a rise in the contact angle measurement from 80° to 112°, as well as an improvement in the liquid entry pressure (LEP) from 25.5 to 52 psi. Moreover, it significantly impacted the improvement of membrane production in the presence of light, while also exhibiting a high degree of operational efficiency.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 10","pages":"1369 - 1380"},"PeriodicalIF":2.4,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141197114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unveiling transformative potential: recent advances in graphene-based polymer composites 揭示变革潜力：石墨烯基聚合物复合材料的最新进展

IF 2.4 3区化学 Q3 POLYMER SCIENCE

Iranian Polymer Journal

Pub Date : 2024-05-28 DOI: 10.1007/s13726-024-01337-2

Maziyar Sabet

Graphene-polymer composites represent a burgeoning field within materials science, offering the potential to revolutionize various industrial applications by synergistically combining the exceptional properties of graphene with the versatility of polymers. This review transcends prior summaries by focusing on recent breakthroughs in dispersion techniques, a critical factor governing composite performance. We elucidate how advancements in dispersion control unlock a paradigm shift in functionalities like mechanical strength, electrical conductivity, and barrier properties. This targeted approach distinguishes this review from broader surveys. Furthermore, we explore novel preparation methods beyond established techniques like solution mixing and in situ polymerization, highlighting their role in achieving exceptional composite performance. The review critically examines emerging applications across diverse industries, showcasing how recent strides empower graphene–polymer composites to disrupt sectors like aerospace, automotive, electronics, and biomedicine. While acknowledging persistent challenges in cost, scalability, and environmental impact, the review emphasizes ongoing research efforts to overcome these hurdles. By providing a roadmap for future advancements, this work serves as a valuable resource for researchers, engineers, and innovators seeking to harness the transformative potential of graphene–polymer composites.

Graphical Abstract

石墨烯-聚合物复合材料是材料科学领域的一个新兴领域，通过将石墨烯的优异特性与聚合物的多功能性协同结合，为各种工业应用提供了革命性的潜力。分散技术是影响复合材料性能的关键因素，本综述超越了以往的综述，重点关注分散技术的最新突破。我们阐明了分散控制的进步如何开启了机械强度、导电性和阻隔性等功能性的范式转变。这种有针对性的方法使本综述有别于更广泛的研究。此外，我们还探讨了溶液混合和原位聚合等既有技术之外的新型制备方法，强调了它们在实现优异复合材料性能方面的作用。本综述批判性地研究了各行各业的新兴应用，展示了石墨烯-聚合物复合材料在航空航天、汽车、电子和生物医学等领域的最新进展。在承认成本、可扩展性和环境影响方面持续存在挑战的同时，该综述强调了为克服这些障碍而正在进行的研究工作。通过为未来的进步提供路线图，这部著作为寻求利用石墨烯-聚合物复合材料变革潜力的研究人员、工程师和创新者提供了宝贵的资源。

{"title":"Unveiling transformative potential: recent advances in graphene-based polymer composites","authors":"Maziyar Sabet","doi":"10.1007/s13726-024-01337-2","DOIUrl":"10.1007/s13726-024-01337-2","url":null,"abstract":"<div><p>Graphene-polymer composites represent a burgeoning field within materials science, offering the potential to revolutionize various industrial applications by synergistically combining the exceptional properties of graphene with the versatility of polymers. This review transcends prior summaries by focusing on recent breakthroughs in dispersion techniques, a critical factor governing composite performance. We elucidate how advancements in dispersion control unlock a paradigm shift in functionalities like mechanical strength, electrical conductivity, and barrier properties. This targeted approach distinguishes this review from broader surveys. Furthermore, we explore novel preparation methods beyond established techniques like solution mixing and in situ polymerization, highlighting their role in achieving exceptional composite performance. The review critically examines emerging applications across diverse industries, showcasing how recent strides empower graphene–polymer composites to disrupt sectors like aerospace, automotive, electronics, and biomedicine. While acknowledging persistent challenges in cost, scalability, and environmental impact, the review emphasizes ongoing research efforts to overcome these hurdles. By providing a roadmap for future advancements, this work serves as a valuable resource for researchers, engineers, and innovators seeking to harness the transformative potential of graphene–polymer composites.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 11","pages":"1651 - 1665"},"PeriodicalIF":2.4,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141169555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Carboxymethyl cellulose hydrogel for pH-responsive drug release of curcumin 用于姜黄素 pH 值响应型药物释放的羧甲基纤维素水凝胶

IF 2.4 3区化学 Q3 POLYMER SCIENCE

Iranian Polymer Journal

Pub Date : 2024-05-20 DOI: 10.1007/s13726-024-01331-8

D. K. S. Nishadani, Thennakoon M. Sampath Udeni Gunathilake, Yern Chee Ching, Hemanth Noothalapati

This study outlines the development of a pH-sensitive hydrogel for hydrophobic drug delivery by cross-linking carboxymethyl cellulose (CMC) with varying fumaric acid (FA) concentrations (9%–26%). FTIR analysis of CMC–FA-26% hydrogel showed a prominent band at 1714 cm⁻¹, indicating the formation of ester bond. Compression tests demonstrated increased strength with cross-linking density changing from 9 to 26%. Stress–strain analysis revealed plastic deformation beyond 80% strain, with compression stress rising from 0.12 ± 0.1 to 1.9 ± 0.1 MPa as FA content increased from 9 to 26%. Thermogravimetric analysis revealed higher weight reduction (25–28%) for CMC–FA-26% compared to CMC–FA-9% (16–18%) during the fumaric acid weight loss stage. Scanning electron microscopic (SEM) examination showed that the hydrogels had a porous structure, crucial for their swelling, drug loading, and release. According to the swelling results, swellability was decreased by increasing cross-linking degree, and increased by increasing pH values. In the biodegradability test, the CMC–FA-26% hydrogel showed 35% weight loss after 28 days, while the CMC–FA-9% hydrogel exhibited a 54% weight loss. To improve the compatibility between hydrophilic CMC and hydrophobic curcumin (CUR)/β-cyclodextrin (β-CD) was incorporated to the hydrogel. The solubility results showed that with varying the molar ratio of CUR:β-CD from 1:1 to 1:3, the mean UV–Vis absorption changed from 0.005 to 1.048. The variation of the medium’s pH from 1.2 to 12 resulted in a notable increase in the cumulative curcumin release, ranging from 5.91 to 46.63%. Drug delivery results indicated excellent drug release in alkaline medium, highlighting the hydrogel’s potential for targeted drug delivery of hydrophobic drugs in the gastrointestinal tract.

Graphical abstract

本研究概述了通过将羧甲基纤维素（CMC）与不同浓度（9%-26%）的富马酸（FA）交联，开发出一种用于疏水性给药的 pH 值敏感水凝胶。CMC-FA-26% 水凝胶的傅立叶变换红外光谱（FTIR）分析表明，在 1714 cm-1 处有一条突出的带，表明形成了酯键。压缩试验表明，随着交联密度从 9% 增加到 26%，强度也随之增加。应力应变分析表明，当 FA 含量从 9% 增加到 26% 时，超过 80% 的应变会产生塑性变形，压缩应力从 0.12 ± 0.1 兆帕增加到 1.9 ± 0.1 兆帕。热重分析表明，在富马酸失重阶段，CMC-FA-26% 的重量比 CMC-FA-9% 的重量（16-18%）减少得更多（25-28%）。扫描电子显微镜（SEM）检查显示，水凝胶具有多孔结构，这对其溶胀、药物负载和释放至关重要。根据溶胀结果，交联度越高，溶胀性越低，而 pH 值越高，溶胀性越高。在生物降解性测试中，28 天后，CMC-FA-26% 水凝胶的失重率为 35%，而 CMC-FA-9% 水凝胶的失重率为 54%。为了提高亲水性 CMC 与疏水性姜黄素（CUR）/β-环糊精（β-CD）之间的相容性，在水凝胶中加入了 CMC-FA-26%。溶解度结果表明，随着 CUR 与 β-CD 的摩尔比从 1:1 变为 1:3，平均紫外可见吸收率从 0.005 变为 1.048。介质的 pH 值从 1.2 变为 12 后，姜黄素的累积释放量显著增加，从 5.91% 增加到 46.63%。给药结果表明，该水凝胶在碱性介质中具有极佳的药物释放性能，突出了其在胃肠道内靶向给疏水性药物的潜力。

{"title":"Carboxymethyl cellulose hydrogel for pH-responsive drug release of curcumin","authors":"D. K. S. Nishadani, Thennakoon M. Sampath Udeni Gunathilake, Yern Chee Ching, Hemanth Noothalapati","doi":"10.1007/s13726-024-01331-8","DOIUrl":"10.1007/s13726-024-01331-8","url":null,"abstract":"<div><p>This study outlines the development of a pH-sensitive hydrogel for hydrophobic drug delivery by cross-linking carboxymethyl cellulose (CMC) with varying fumaric acid (FA) concentrations (9%–26%). FTIR analysis of CMC–FA-26% hydrogel showed a prominent band at 1714 cm<sup>−1</sup>, indicating the formation of ester bond. Compression tests demonstrated increased strength with cross-linking density changing from 9 to 26%. Stress–strain analysis revealed plastic deformation beyond 80% strain, with compression stress rising from 0.12 ± 0.1 to 1.9 ± 0.1 MPa as FA content increased from 9 to 26%. Thermogravimetric analysis revealed higher weight reduction (25–28%) for CMC–FA-26% compared to CMC–FA-9% (16–18%) during the fumaric acid weight loss stage. Scanning electron microscopic (SEM) examination showed that the hydrogels had a porous structure, crucial for their swelling, drug loading, and release. According to the swelling results, swellability was decreased by increasing cross-linking degree, and increased by increasing pH values. In the biodegradability test, the CMC–FA-26% hydrogel showed 35% weight loss after 28 days, while the CMC–FA-9% hydrogel exhibited a 54% weight loss. To improve the compatibility between hydrophilic CMC and hydrophobic curcumin (CUR)/β-cyclodextrin (β-CD) was incorporated to the hydrogel. The solubility results showed that with varying the molar ratio of CUR:β-CD from 1:1 to 1:3, the mean UV–Vis absorption changed from 0.005 to 1.048. The variation of the medium’s pH from 1.2 to 12 resulted in a notable increase in the cumulative curcumin release, ranging from 5.91 to 46.63%. Drug delivery results indicated excellent drug release in alkaline medium, highlighting the hydrogel’s potential for targeted drug delivery of hydrophobic drugs in the gastrointestinal tract.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 10","pages":"1449 - 1467"},"PeriodicalIF":2.4,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141119652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An experimental analysis on thermal performance of interloping threaded cooling channels in injection mold cavity 注塑模腔内螺纹交错冷却通道热性能的实验分析

IF 2.4 3区化学 Q3 POLYMER SCIENCE

Iranian Polymer Journal

Pub Date : 2024-05-20 DOI: 10.1007/s13726-024-01329-2

Prashant Paraye, R. M. Sarviya

Injection molding is a mass manufacturing process, which facilitates the production of specially designed products in diverse shapes and sizes using various materials, serving industries from daily necessities to aerospace components. The cooling process in injection molding takes up a significant portion of an overall cycle time. In this study, a thermal analysis of conventional and threaded cooling channels in injection mold cavity was conducted using infrared thermal imaging. The experiments measured the temperature distributions in the mold cavity as they reached steady states during both heating and cooling phases. The temperature–time dynamics within the injection mold cavity revealed that the threaded design was significantly more efficient, heating up 23.4 s faster and cooling down 33.3 s quicker than the conventional cooling channel. Additionally, the threaded cooling channel maintained a more uniform temperature distribution of 1.64 °C lower than that in conventional cooling. The threaded configuration achieved peak temperatures 5.88% more rapidly and returned faster to near-ambient levels by 5.55%, highlighting its enhanced efficiency. Findings showed a higher quality of mold products and a reduction in cooling time, with the threaded cooling channel producing parts characterized by a high-gloss and refined surface finish. This enhanced performance of the threaded cooling channel could lead to significant energy savings and productivity gains in industrial applications.

Graphical abstract

注塑成型是一种大规模制造工艺，可使用各种材料生产出形状和尺寸各异的特殊设计产品，服务于从日用品到航空航天组件等各行各业。注塑成型中的冷却过程在整个循环时间中占很大比重。本研究利用红外热成像技术对注塑模腔中的传统冷却通道和螺纹冷却通道进行了热分析。实验测量了模具型腔在加热和冷却阶段达到稳定状态时的温度分布。注塑模腔内的温度-时间动态显示，螺纹式设计的效率明显更高，与传统冷却通道相比，加热时间快 23.4 秒，冷却时间快 33.3 秒。此外，螺纹冷却通道的温度分布更均匀，比传统冷却方式低 1.64 °C。螺纹配置达到峰值温度的速度快 5.88%，恢复到接近环境温度的速度快 5.55%，凸显了其更高的效率。研究结果表明，螺纹冷却通道的模具产品质量更高，冷却时间更短，生产出的零件表面光洁细腻。螺纹冷却通道性能的提高可在工业应用中显著节约能源和提高生产率。

{"title":"An experimental analysis on thermal performance of interloping threaded cooling channels in injection mold cavity","authors":"Prashant Paraye, R. M. Sarviya","doi":"10.1007/s13726-024-01329-2","DOIUrl":"10.1007/s13726-024-01329-2","url":null,"abstract":"<div><p>Injection molding is a mass manufacturing process, which facilitates the production of specially designed products in diverse shapes and sizes using various materials, serving industries from daily necessities to aerospace components. The cooling process in injection molding takes up a significant portion of an overall cycle time. In this study, a thermal analysis of conventional and threaded cooling channels in injection mold cavity was conducted using infrared thermal imaging. The experiments measured the temperature distributions in the mold cavity as they reached steady states during both heating and cooling phases. The temperature–time dynamics within the injection mold cavity revealed that the threaded design was significantly more efficient, heating up 23.4 s faster and cooling down 33.3 s quicker than the conventional cooling channel. Additionally, the threaded cooling channel maintained a more uniform temperature distribution of 1.64 °C lower than that in conventional cooling. The threaded configuration achieved peak temperatures 5.88% more rapidly and returned faster to near-ambient levels by 5.55%, highlighting its enhanced efficiency. Findings showed a higher quality of mold products and a reduction in cooling time, with the threaded cooling channel producing parts characterized by a high-gloss and refined surface finish. This enhanced performance of the threaded cooling channel could lead to significant energy savings and productivity gains in industrial applications.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 11","pages":"1539 - 1552"},"PeriodicalIF":2.4,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141123096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strong and tough conductive silk fibroin/poly(vinyl alcohol) composite hydrogel by a salting-in and salting-out synergistic effect 通过盐入和盐出协同效应实现强韧的导电丝纤维素/聚乙烯醇复合水凝胶

IF 2.4 3区化学 Q3 POLYMER SCIENCE

Iranian Polymer Journal

Pub Date : 2024-05-19 DOI: 10.1007/s13726-024-01334-5

Honghui Ma, Yingxue Deng, Yubo Lin, Yu Zhang, Zhengxiong Zhou, Haoan Yu, Xiancai Jiang

Hofmeister effect has been used to prepare highly tough and conductive hydrogel. However, it usually needs the complex steps of post-treatment of a pre-formed weak hydrogel by soaking in salt solution. Herein, strong and tough silk fibroin/poly(vinyl alcohol) (SF/PVA) ionic conductive hydrogel was prepared by a simple one-pot method by direct introduction of sodium citrate (Na₃Cit) into SF/PVA solution. It was found that Na₃Cit could not be directly introduced into SF/PVA solution due to its salting-out effect to prepare tough hydrogel. Fortunately, the salting-out effect of Na₃Cit could be weakened with the presence of calcium chloride (CaCl₂) and glycerol in SF/PVA solution. Finally, the strong and tough SF/PVA hydrogel was obtained by the one-time freezing/thawing process of SF/PVA/CaCl₂/Na₃Cit/glycerol solution. The tough SF/PVA/CaCl₂/Na₃Cit/glycerol organohydrogel with the tensile strength of 0.33 MPa and elongation-at-break of 540% were obtained. The SF/PVA/CaCl₂/Na₃Cit/glycerol organohydrogel with the excellent mechanical properties and ionic conductivity was used as the strain sensor. The SF/PVA/CaCl₂/Na₃Cit/glycerol organohydrogel sensor could detect various human motions with high sensitivity (GF = 6.87). The SF/PVA/CaCl₂/Na₃Cit/glycerol organo hydrogel strain sensor could generate reliable and reproducible electrical signals in response to various mechanical stimuli. We intend to present a simple and effective method to prepare high performance ionic hydrogel by Hofmeister effect.

Graphical Abstract

霍夫迈斯特效应已被用于制备高韧性和导电性水凝胶。然而，这种方法通常需要通过在盐溶液中浸泡对预先形成的弱水凝胶进行后处理等复杂步骤。本文采用简单的一锅法，在 SF/PVA 溶液中直接加入柠檬酸钠（Na3Cit），制备出了强韧的丝纤维素/聚乙烯醇（SF/PVA）离子导电水凝胶。研究发现，由于 Na3Cit 的盐析效应，无法将其直接引入 SF/PVA 溶液中制备韧性水凝胶。幸运的是，在 SF/PVA 溶液中加入氯化钙（CaCl2）和甘油可以减弱 Na3Cit 的盐析效应。最后，通过对 SF/PVA/CaCl2/Na3Cit/ 甘油溶液进行一次性冷冻/解冻处理，得到了强韧的 SF/PVA 水凝胶。得到的韧性 SF/PVA/CaCl2/Na3Cit/ 甘油有机水凝胶的拉伸强度为 0.33 MPa，断裂伸长率为 540%。该 SF/PVA/CaCl2/Na3Cit/ 甘油有机水凝胶具有优异的机械性能和离子传导性，可用作应变传感器。SF/PVA/CaCl2/Na3Cit/ 甘油有机水凝胶传感器能高灵敏度（GF = 6.87）地检测人体的各种运动。SF/PVA/CaCl2/Na3Cit/ 甘油有机水凝胶应变传感器可对各种机械刺激产生可靠且可重复的电信号。我们打算介绍一种利用霍夫迈斯特效应制备高性能离子水凝胶的简单而有效的方法。

{"title":"Strong and tough conductive silk fibroin/poly(vinyl alcohol) composite hydrogel by a salting-in and salting-out synergistic effect","authors":"Honghui Ma, Yingxue Deng, Yubo Lin, Yu Zhang, Zhengxiong Zhou, Haoan Yu, Xiancai Jiang","doi":"10.1007/s13726-024-01334-5","DOIUrl":"10.1007/s13726-024-01334-5","url":null,"abstract":"<div><p>Hofmeister effect has been used to prepare highly tough and conductive hydrogel. However, it usually needs the complex steps of post-treatment of a pre-formed weak hydrogel by soaking in salt solution. Herein, strong and tough silk fibroin/poly(vinyl alcohol) (SF/PVA) ionic conductive hydrogel was prepared by a simple one-pot method by direct introduction of sodium citrate (Na<sub>3</sub>Cit) into SF/PVA solution. It was found that Na<sub>3</sub>Cit could not be directly introduced into SF/PVA solution due to its salting-out effect to prepare tough hydrogel. Fortunately, the salting-out effect of Na<sub>3</sub>Cit could be weakened with the presence of calcium chloride (CaCl<sub>2</sub>) and glycerol in SF/PVA solution. Finally, the strong and tough SF/PVA hydrogel was obtained by the one-time freezing/thawing process of SF/PVA/CaCl<sub>2</sub>/Na<sub>3</sub>Cit/glycerol solution. The tough SF/PVA/CaCl<sub>2</sub>/Na<sub>3</sub>Cit/glycerol organohydrogel with the tensile strength of 0.33 MPa and elongation-at-break of 540% were obtained. The SF/PVA/CaCl<sub>2</sub>/Na<sub>3</sub>Cit/glycerol organohydrogel with the excellent mechanical properties and ionic conductivity was used as the strain sensor. The SF/PVA/CaCl<sub>2</sub>/Na<sub>3</sub>Cit/glycerol organohydrogel sensor could detect various human motions with high sensitivity (GF = 6.87). The SF/PVA/CaCl<sub>2</sub>/Na<sub>3</sub>Cit/glycerol organo hydrogel strain sensor could generate reliable and reproducible electrical signals in response to various mechanical stimuli. We intend to present a simple and effective method to prepare high performance ionic hydrogel by Hofmeister effect.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":"33 11","pages":"1527 - 1537"},"PeriodicalIF":2.4,"publicationDate":"2024-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141060375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0