Hydrogel, a water-swollen polymeric network, has emerged as an appealing protagonist in the realm of 3D/4D printing technology. This review offers a glimpse into the promising world of hydrogel-based additive manufacturing and its profound impact on the technological landscape.
In an era where customization, sustainability, and adaptability are paramount, hydrogel-infused 3D/4D printing offers a tantalizing glimpse into the future of design, manufacturing, and healthcare. This review explores the novel and exciting area of 3D and 4D printing, with a specific focus on the application of hydrogels in this revolutionary manufacturing process. Hydrogels, as intelligent and stimuli-responsive materials, hold great promise in the field of 3D and 4D printing due to their ability to change their shape and properties over time in response to external stimuli. This review provides an in-depth analysis of the current state of research in addictive manufacturing, emerging application of hydrogel in 3D and 4D printing, current challenges, and opportunities in utilizing hydrogels for 4D printing applications.
{"title":"The appealing prospect of hydrogel in 3D/4D printing technology: Overview and opportunities","authors":"Yakubu Adekunle Alli , Hazleen Anuar , Abayomi Bamisaye , Mohd Romainor Manshor , Nelson Oshogwue Etafo , Muyideen Olaitan Bamidele , Mikail Abiodun Rasheed , Simeon Kayowa Olatunde , Ayobami Samuel Akinfenwa , Afolashade Lawal","doi":"10.1016/j.polymer.2024.127823","DOIUrl":"10.1016/j.polymer.2024.127823","url":null,"abstract":"<div><div>Hydrogel, a water-swollen polymeric network, has emerged as an appealing protagonist in the realm of 3D/4D printing technology. This review offers a glimpse into the promising world of hydrogel-based additive manufacturing and its profound impact on the technological landscape.</div><div>In an era where customization, sustainability, and adaptability are paramount, hydrogel-infused 3D/4D printing offers a tantalizing glimpse into the future of design, manufacturing, and healthcare. This review explores the novel and exciting area of 3D and 4D printing, with a specific focus on the application of hydrogels in this revolutionary manufacturing process. Hydrogels, as intelligent and stimuli-responsive materials, hold great promise in the field of 3D and 4D printing due to their ability to change their shape and properties over time in response to external stimuli. This review provides an in-depth analysis of the current state of research in addictive manufacturing, emerging application of hydrogel in 3D and 4D printing, current challenges, and opportunities in utilizing hydrogels for 4D printing applications.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"315 ","pages":"Article 127823"},"PeriodicalIF":4.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142601592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A novel method was developed for constructing cross-linked Silsesquioxane, utilizing Q-type H-POSS as a precursor. The Piers-Rubinsztajn (P-R) like reaction of Q-type H-POSS was catalyzed by B(C6F5)3, resulting in the production of a prepolymer containing partial Si-H. Upon heating at high temperature in air, the prepolymer transformed into an insoluble and infusible cross-linked polymer, named Cured poly(H-POSS). This polymer exhibited high thermostability, with a 5% weight loss temperature (T5d) of 709 °C and a residue of 92% at 800 °C. Additionally, Cured poly(H-POSS) exhibited high transparency, with a transmittance of 90% in the 400-800 nm wavelength range, and favorable dielectric properties, with a dielectric constant (Dk) of 2.88 at 14 GHz.
{"title":"Crosslinked Silsesquioxane with High Thermal Stability and Low Dielectric Constant by the Autopolymerization of Q-type H-POSS","authors":"Zaoxia Wen, Liang Xu, Xingyu Liu, Linxuan Fang, Lianbin Wu","doi":"10.1016/j.polymer.2024.127843","DOIUrl":"https://doi.org/10.1016/j.polymer.2024.127843","url":null,"abstract":"A novel method was developed for constructing cross-linked Silsesquioxane, utilizing Q-type H-POSS as a precursor. The Piers-Rubinsztajn (P-R) like reaction of Q-type H-POSS was catalyzed by B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>, resulting in the production of a prepolymer containing partial Si-H. Upon heating at high temperature in air, the prepolymer transformed into an insoluble and infusible cross-linked polymer, named Cured poly(H-POSS). This polymer exhibited high thermostability, with a 5% weight loss temperature (<em>T</em><sub>5d</sub>) of 709 °C and a residue of 92% at 800 °C. Additionally, Cured poly(H-POSS) exhibited high transparency, with a transmittance of 90% in the 400-800 nm wavelength range, and favorable dielectric properties, with a dielectric constant (<em>D</em><sub>k</sub>) of 2.88 at 14 GHz.","PeriodicalId":405,"journal":{"name":"Polymer","volume":"19 1","pages":""},"PeriodicalIF":4.6,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142601590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Polyamide 4 (PA4) is a lactam-based aliphatic synthetic polymer with promising properties and admirable biodegradability. In this study, oriented PA4 fibers were fabricated by dry spinning followed by thermal drawing. Elastic modulus (El) of the crystalline regions (crystal modulus) of PA4 fibers in the direction parallel to the chain axis was evaluated from the X-ray diffraction peak shift owing to the tensile stress. The apparent El value of PA4 is 67 GPa for meridional 004 reflection and 119 GPa for 0010 reflection, respectively. The reason for the different El is that the decrease of crystallite size of PA4 by the applied stress brought extra shifts of 004 reflection peak to lower angle based on the Laue factor. In contrast, 0010 reflection peak received less effects from this effect, and the El value of 119 GPa obtained from 0010 reflection was considered to be a reliable value. The observed El value of PA4 is much lower than the calculated values assuming fully extended planar zigzag skeleton for PA4. Thus the low El value is attributed to the highly contraction (−1.9 %) from the fully extended conformation as observed for another polyamides.
聚酰胺 4（PA4）是一种内酰胺基脂肪族合成聚合物，具有良好的性能和可生物降解性。本研究采用干法纺丝和热拉伸工艺制作了取向聚酰胺 4 纤维。根据拉伸应力导致的 X 射线衍射峰值移动，评估了 PA4 纤维结晶区在平行于链轴方向上的弹性模量（El）。在经向 004 反射和 0010 反射中，PA4 的表观 El 值分别为 67 GPa 和 119 GPa。造成 El 值不同的原因是，根据 Laue 因子，外加应力使 PA4 的晶粒尺寸减小，导致 004 反射峰向低角度移动。相比之下，0010 反射峰受到的影响较小，因此从 0010 反射峰得到的 119 GPa El 值被认为是一个可靠的值。观察到的 PA4 El 值远远低于假设 PA4 骨架为完全扩展的平面人字形的计算值。因此，较低的 El 值是由于在其他聚酰胺中观察到的完全伸展构象的高度收缩（-1.9%）造成的。
{"title":"Microstructure and crystal modulus of polyamide 4 α-form in the direction parallel to the chain axis","authors":"Chenyue He , Takuya Matsumoto , Masahiro Fujie , Takayuki Sato , Kenichi Sugimoto , Seiko Horiuchi , Yasuo Gotoh , Takashi Nishino","doi":"10.1016/j.polymer.2024.127820","DOIUrl":"10.1016/j.polymer.2024.127820","url":null,"abstract":"<div><div>Polyamide 4 (PA4) is a lactam-based aliphatic synthetic polymer with promising properties and admirable biodegradability. In this study, oriented PA4 fibers were fabricated by dry spinning followed by thermal drawing. Elastic modulus (<em>E</em><sub><em>l</em></sub>) of the crystalline regions (crystal modulus) of PA4 fibers in the direction parallel to the chain axis was evaluated from the X-ray diffraction peak shift owing to the tensile stress. The apparent <em>E</em><sub><em>l</em></sub> value of PA4 is 67 GPa for meridional 004 reflection and 119 GPa for 0010 reflection, respectively. The reason for the different <em>E</em><sub><em>l</em></sub> is that the decrease of crystallite size of PA4 by the applied stress brought extra shifts of 004 reflection peak to lower angle based on the Laue factor. In contrast, 0010 reflection peak received less effects from this effect, and the <em>E</em><sub><em>l</em></sub> value of 119 GPa obtained from 0010 reflection was considered to be a reliable value. The observed <em>E</em><sub><em>l</em></sub> value of PA4 is much lower than the calculated values assuming fully extended planar zigzag skeleton for PA4. Thus the low <em>E</em><sub><em>l</em></sub> value is attributed to the highly contraction (−1.9 %) from the fully extended conformation as observed for another polyamides.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"315 ","pages":"Article 127820"},"PeriodicalIF":4.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142601629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The preparation of the polyimine (PI) networks from renewable feedstocks has attracted increasing attention due to the degradability and self-healing capabilities of PI networks, which contribute to sustainable development. However, most of bio-based PI networks possess poor environmental stability and mechanical strength. Herein, natural peach gum w·as employed to construct water-resistant bio-based PI networks with high performances, by the curing reaction of Schiff base between 4-aminobenzoic acid grafted peach gum polysaccharide and vanillin-derived difunctionalized aldehyde. The resultant polyimine networks (PGBV) exhibit high tensile strength and high Young's modulus, due to their unique network structures. Moreover, PGBV-100 demonstrates excellent hydrophobicity, welding, self-healing and reprocessing abilities. Furthermore, PGBV-100 can completely degrade in an aqueous solution of HCl (0.1 M), enabling closed-loop recycling. In this work, a research strategy for constructing bio-based PI networks with high performances is presented and the resultant PGBV networks show promising potential application as materials for transportation and building materials.
由于聚酰亚胺（PI）网络具有可降解性和自愈能力，有助于可持续发展，因此利用可再生原料制备聚酰亚胺（PI）网络日益受到关注。然而，大多数生物基 PI 网络的环境稳定性和机械强度较差。本文利用天然桃胶，通过 4-aminobenzoic acid 接枝桃胶多糖与香兰素衍生的双官能团醛之间的希夫碱固化反应，构建了具有高性能的防水生物基 PI 网络。由于其独特的网络结构，生成的聚亚胺网络（PGBV）具有很高的拉伸强度和杨氏模量。此外，PGBV-100 还具有出色的疏水性、焊接性、自愈性和再加工能力。此外，PGBV-100 还能在盐酸（0.1 M）水溶液中完全降解，从而实现闭环回收。本研究提出了一种构建高性能生物基 PI 网络的研究策略，所得到的 PGBV 网络作为运输和建筑材料的材料具有广阔的应用前景。
{"title":"Peach gum-based polyimine networks with water resistant, high strength and recycling performances","authors":"Ting Huang , Xianjie Pan , Aoqian Xi, Wenpei Chen, Ningning Zhang, Yanning Zeng","doi":"10.1016/j.polymer.2024.127845","DOIUrl":"10.1016/j.polymer.2024.127845","url":null,"abstract":"<div><div>The preparation of the polyimine (PI) networks from renewable feedstocks has attracted increasing attention due to the degradability and self-healing capabilities of PI networks, which contribute to sustainable development. However, most of bio-based PI networks possess poor environmental stability and mechanical strength. Herein, natural peach gum w·as employed to construct water-resistant bio-based PI networks with high performances, by the curing reaction of Schiff base between 4-aminobenzoic acid grafted peach gum polysaccharide and vanillin-derived difunctionalized aldehyde. The resultant polyimine networks (PGBV) exhibit high tensile strength and high Young's modulus, due to their unique network structures. Moreover, PGBV-100 demonstrates excellent hydrophobicity, welding, self-healing and reprocessing abilities. Furthermore, PGBV-100 can completely degrade in an aqueous solution of HCl (0.1 M), enabling closed-loop recycling. In this work, a research strategy for constructing bio-based PI networks with high performances is presented and the resultant PGBV networks show promising potential application as materials for transportation and building materials.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"315 ","pages":"Article 127845"},"PeriodicalIF":4.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142601631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-13DOI: 10.1016/j.polymer.2024.127813
Tae Hoon Lee , Jun Hyeok Kang , Min Gyu Shin , Jung-Hyun Lee , Hyo Won Kim , Ho Bum Park
High-flux and selective membranes are key components to improving the energy efficiency of nanofiltration processes for water purification. Herein, we report high-flux polyamide thin-film composite (TFC) membranes consisting of Tröger's base for nanofiltration. Tröger's base diamine (TBD) was synthesized as an aqueous phase monomer for interfacial polymerization. Detailed characterization of TBD-based polyamides was performed using thermal, spectroscopic, and microscopic analyses. Notably, the V-shaped and rigid Tröger's base motif rendered TBD-based polyamide (named TBD-TMC) features with enhanced microporosity as well as an enlarged pore size compared to conventional polyamide chemistry (i.e., MPD-TMC). As a result, the TBD-TMC membrane exhibited a 570 % improvement in water permeance compared to MPD-TMC membranes while exhibiting moderate salt rejection up to 91 %, outperforming most reported nanofiltration membranes. Also, the TBD-TMC membrane exhibited high monovalent/divalent ion selectivity (∼7.0 for NaCl/Na2SO4 separation), which may have resulted from the combined effects of size exclusion and charge repulsion. This work highlights the potential of Tröger's base motif as a new diamine monomer for interfacially polymerized membranes to tune their microporous structures.
{"title":"High-flux polyamide thin-film composite membranes consisting of Tröger's base motif with enhanced microporosity for nanofiltration","authors":"Tae Hoon Lee , Jun Hyeok Kang , Min Gyu Shin , Jung-Hyun Lee , Hyo Won Kim , Ho Bum Park","doi":"10.1016/j.polymer.2024.127813","DOIUrl":"10.1016/j.polymer.2024.127813","url":null,"abstract":"<div><div>High-flux and selective membranes are key components to improving the energy efficiency of nanofiltration processes for water purification. Herein, we report high-flux polyamide thin-film composite (TFC) membranes consisting of Tröger's base for nanofiltration. Tröger's base diamine (TBD) was synthesized as an aqueous phase monomer for interfacial polymerization. Detailed characterization of TBD-based polyamides was performed using thermal, spectroscopic, and microscopic analyses. Notably, the V-shaped and rigid Tröger's base motif rendered TBD-based polyamide (named TBD-TMC) features with enhanced microporosity as well as an enlarged pore size compared to conventional polyamide chemistry (i.e., MPD-TMC). As a result, the TBD-TMC membrane exhibited a 570 % improvement in water permeance compared to MPD-TMC membranes while exhibiting moderate salt rejection up to 91 %, outperforming most reported nanofiltration membranes. Also, the TBD-TMC membrane exhibited high monovalent/divalent ion selectivity (∼7.0 for NaCl/Na<sub>2</sub>SO<sub>4</sub> separation), which may have resulted from the combined effects of size exclusion and charge repulsion. This work highlights the potential of Tröger's base motif as a new diamine monomer for interfacially polymerized membranes to tune their microporous structures.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"315 ","pages":"Article 127813"},"PeriodicalIF":4.1,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142601591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-12DOI: 10.1016/j.polymer.2024.127824
Rossella Sesia , Paula Pou I Rodríguez , Massimo Calovi , Minna Hakkarainen , Stefano Rossi , Sara Ferraris , Silvia Spriano , Marco Sangermano
Corrosion causes serious steel deterioration with consequent negative impacts on the environment and economy. Organic coatings are widely exploited to provide corrosion protection on low-carbon steel. However, the raw materials and preparation methods for common anticorrosive coatings are not sustainable. In this framework, the efficient microwave-assisted methacrylation of a natural polyphenolic compound, tannic acid (TA), provided a UV-curable monomer with a high degree of substitution. The produced methacrylated tannic acid (MTA) was characterized by means of 31P NMR and FTIR spectroscopies. The UV-curing of MTA by radical photopolymerization was deeply investigated via the real-time FTIR, photo-DSC, and photo-rheological analyses, confirming the high photo-reactivity of MTA with a conversion of 80 % and a gel point at 2.5 s. The UV-cured MTA showed good thermal stability and a glass transition temperature (Tg) of 133 °C. Furthermore, UV-cured MTA coating exhibited high hardness and hydrophobicity. The zeta potential measurement indicated a negatively charged surface with an isoelectric point (IEP) at pH 2.7. Finally, the good corrosion protection performance of UV-cured MTA coating on plasma pre-treated steel surface was assessed through electrochemical impedance spectroscopy.
腐蚀会导致钢材严重老化，从而对环境和经济产生负面影响。有机涂层被广泛用于为低碳钢提供防腐保护。然而，普通防腐涂料的原材料和制备方法都不是可持续的。在此框架下，对天然多酚化合物单宁酸（TA）进行高效的微波辅助甲基丙烯酸化，提供了一种具有高取代度的紫外线固化单体。通过 31P NMR 和傅立叶变换红外光谱对生成的甲基丙烯酸单宁酸（MTA）进行了表征。通过实时傅立叶变换红外光谱（FTIR）、光致变量-电化学（DSC）和光流变学分析对自由基光聚合法紫外固化 MTA 进行了深入研究，结果表明 MTA 具有很高的光活性，转化率达 80%，凝胶点为 2.5 秒。此外，紫外固化 MTA 涂层还具有高硬度和疏水性。zeta 电位测量结果表明，涂层表面带负电，等电点（IEP）为 pH 值 2.7。最后，通过电化学阻抗光谱评估了等离子预处理钢表面紫外固化 MTA 涂层的良好腐蚀保护性能。
{"title":"Microwave-functionalized natural tannic acid as an anticorrosive UV-curable coating","authors":"Rossella Sesia , Paula Pou I Rodríguez , Massimo Calovi , Minna Hakkarainen , Stefano Rossi , Sara Ferraris , Silvia Spriano , Marco Sangermano","doi":"10.1016/j.polymer.2024.127824","DOIUrl":"10.1016/j.polymer.2024.127824","url":null,"abstract":"<div><div>Corrosion causes serious steel deterioration with consequent negative impacts on the environment and economy. Organic coatings are widely exploited to provide corrosion protection on low-carbon steel. However, the raw materials and preparation methods for common anticorrosive coatings are not sustainable. In this framework, the efficient microwave-assisted methacrylation of a natural polyphenolic compound, tannic acid (TA), provided a UV-curable monomer with a high degree of substitution. The produced methacrylated tannic acid (MTA) was characterized by means of <sup>31</sup>P NMR and FTIR spectroscopies. The UV-curing of MTA by radical photopolymerization was deeply investigated <em>via</em> the real-time FTIR, photo-DSC, and photo-rheological analyses, confirming the high photo-reactivity of MTA with a conversion of 80 % and a gel point at 2.5 s. The UV-cured MTA showed good thermal stability and a glass transition temperature (T<sub>g</sub>) of 133 °C. Furthermore, UV-cured MTA coating exhibited high hardness and hydrophobicity. The zeta potential measurement indicated a negatively charged surface with an isoelectric point (IEP) at pH 2.7. Finally, the good corrosion protection performance of UV-cured MTA coating on plasma pre-treated steel surface was assessed through electrochemical impedance spectroscopy.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"315 ","pages":"Article 127824"},"PeriodicalIF":4.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142601638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study explores the realization of the shape memory effect (SME) in composite materials composed of polylactide (PLA) filled with diopside particles exhibiting varied supramolecular structures, such as spherulites and amorphous lamellar structures. We investigated the influence of diopside filler on the thermomechanical properties and shape recovery behavior of PLA-based composites. Different supramolecular structures of PLA were achieved through controlled crystallization processes. Comprehensive characterization techniques, including differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and dynamic mechanical analysis (DMA), were employed to elucidate the structure-property relationships. The results indicate that the diopside enhances the SME of PLA composites, with the degree of improvement being dependent on the specific supramolecular structure of the polymer matrix. Our findings provide insights into the design of advanced SMPs with tailored properties for potential applications in medicine.
{"title":"Realization of the shape memory effect in a composite material PLA/Diopside with different supramolecular structures","authors":"Polina Kovaleva , Inna Bulygina , Anna Cheremnykh , Eugene Statnik , Ekaterina Ivantsova , Iuliia Sadykova , Mikhail Zadorozhnyy , Artem Korol , Fedor Senatov","doi":"10.1016/j.polymer.2024.127831","DOIUrl":"10.1016/j.polymer.2024.127831","url":null,"abstract":"<div><div>This study explores the realization of the shape memory effect (SME) in composite materials composed of polylactide (PLA) filled with diopside particles exhibiting varied supramolecular structures, such as spherulites and amorphous lamellar structures. We investigated the influence of diopside filler on the thermomechanical properties and shape recovery behavior of PLA-based composites. Different supramolecular structures of PLA were achieved through controlled crystallization processes. Comprehensive characterization techniques, including differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and dynamic mechanical analysis (DMA), were employed to elucidate the structure-property relationships. The results indicate that the diopside enhances the SME of PLA composites, with the degree of improvement being dependent on the specific supramolecular structure of the polymer matrix. Our findings provide insights into the design of advanced SMPs with tailored properties for potential applications in medicine.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"315 ","pages":"Article 127831"},"PeriodicalIF":4.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142599629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zinc indium sulfide has been used as a heterogeneous recyclable photocatalyst in visible light-induced atom transfer radical polymerization (ATRP). The photocatalyst was found to catalyze ATRP via an oxidative quenching mechanism without any additives. Polymers in high conversion and good control can be obtained. The kinetic study, light on/off experiment and the block copolymer synthesis showed the “living”/controlled nature of the polymerization. The photocatalyst can be reused for five times without obvious loss of control in the polymerization. Metal residue was not detected in the resulting polymers. This strategy provides a noval way for well-controlled polymer synthesis using recyclable visible light photocatalysis.
{"title":"Exploring the catalytic performance of recyclable zinc indium sulfide in polymer synthesis: Well-controlled photoATRP of acrylates","authors":"Jianmin Fu, Xiaoxia Liu, Zichen Wu, Donglei Wei, Hou Chen, Liangjiu Bai, Wenxiang Wang, Huawei Yang, Lixia Yang","doi":"10.1016/j.polymer.2024.127828","DOIUrl":"10.1016/j.polymer.2024.127828","url":null,"abstract":"<div><div>Zinc indium sulfide has been used as a heterogeneous recyclable photocatalyst in visible light-induced atom transfer radical polymerization (ATRP). The photocatalyst was found to catalyze ATRP via an oxidative quenching mechanism without any additives. Polymers in high conversion and good control can be obtained. The kinetic study, light on/off experiment and the block copolymer synthesis showed the “living”/controlled nature of the polymerization. The photocatalyst can be reused for five times without obvious loss of control in the polymerization. Metal residue was not detected in the resulting polymers. This strategy provides a noval way for well-controlled polymer synthesis using recyclable visible light photocatalysis.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"315 ","pages":"Article 127828"},"PeriodicalIF":4.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142601639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-12DOI: 10.1016/j.polymer.2024.127833
Keren Shi , Qiaowei Xiao , Zhiqiang Tian , Yueyue Kong , Wufei Tang , Huiqin Yao
With the aim of both reducing pollution and improving the utilization of coal by–products, a fly ash desilication solution is proposed as the silicon source for the preparation of the mesoporous molecular sieve MCM-48. A series of a highly effective and raspberry-shaped adsorbents for treating wastewater contaminated with heavy metal ions are obtained by modifying the MCM-48 with polyaniline (PANI) through a hydrothermal synthetic strategy. The results of experimental studies show that MCM-48/1PANI has removal efficiencies for Cd2+, Co2+, and Cu2+ of 97.67 %, 94.35 % and 87.26 %, respectively, which are significantly better than those of raw MCM-48. The adsorption behavior fits well with the proposed second-order kinetic equation and the Langmuir isothermal adsorption model. It is shown that the adsorbent shares electrons or electron transfer with the metal ions and forms a homogeneous monolayer adsorption on the adsorbent surface. In an experiment on adsorption of ions coexisting in solution, the selectivity of adsorption is found to be Cd2+ > Co2+ > Cu2+, with the differences being ascribed to the different hydration radii of metal ions. A test of cyclic regeneration performance shows that the MCM-48/1PANI adsorbent exhibits excellent stability after five cycles. Thus, this work provides not only a way for preparing MCM-48/PANI from fly ash, but also an efficient method for removal of heavy metal ions from wastewater.
{"title":"Polyaniline modified fly ash based MCM-48 as a highly effective and raspberry-shaped adsorbent for Cd2+, Co2+, and Cu2+","authors":"Keren Shi , Qiaowei Xiao , Zhiqiang Tian , Yueyue Kong , Wufei Tang , Huiqin Yao","doi":"10.1016/j.polymer.2024.127833","DOIUrl":"10.1016/j.polymer.2024.127833","url":null,"abstract":"<div><div>With the aim of both reducing pollution and improving the utilization of coal by–products, a fly ash desilication solution is proposed as the silicon source for the preparation of the mesoporous molecular sieve MCM-48. A series of a highly effective and raspberry-shaped adsorbents for treating wastewater contaminated with heavy metal ions are obtained by modifying the MCM-48 with polyaniline (PANI) through a hydrothermal synthetic strategy. The results of experimental studies show that MCM-48/1PANI has removal efficiencies for Cd<sup>2+</sup>, Co<sup>2+</sup>, and Cu<sup>2+</sup> of 97.67 %, 94.35 % and 87.26 %, respectively, which are significantly better than those of raw MCM-48. The adsorption behavior fits well with the proposed second-order kinetic equation and the Langmuir isothermal adsorption model. It is shown that the adsorbent shares electrons or electron transfer with the metal ions and forms a homogeneous monolayer adsorption on the adsorbent surface. In an experiment on adsorption of ions coexisting in solution, the selectivity of adsorption is found to be Cd<sup>2+</sup> > Co<sup>2+</sup> > Cu<sup>2+</sup>, with the differences being ascribed to the different hydration radii of metal ions. A test of cyclic regeneration performance shows that the MCM-48/1PANI adsorbent exhibits excellent stability after five cycles. Thus, this work provides not only a way for preparing MCM-48/PANI from fly ash, but also an efficient method for removal of heavy metal ions from wastewater.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"315 ","pages":"Article 127833"},"PeriodicalIF":4.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142601635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-12DOI: 10.1016/j.polymer.2024.127772
Shaohua Wang , Yue Zhang , Guowei Hao , Yue Wang , Zheng Gong , Changhai Zhang , Yongquan Zhang , Tiandong Zhang , Qi Wang
Polymer dielectric capacitors have high power density and are an integral component of electronic and power device. Currently, the limited energy density restricts their further application. In this research, a novel method was designed to optimize performance of PMMA/PVDF composite via an alternating stacked multi-layer structure. And, the five-alternating-layer of PVDF-PMMA-PVDF-PMMA-PVDF (F-A-F-A-F) composite has excellent dielectric properties, for instance, a better dielectric constant (4.52@1 kHz) and a low dielectric loss (0.034@1 kHz). The discharge energy density (Ue) of it is significantly larger than that of PMMA and PVDF. Particularly, the Ue of F-A-F-A-F composite is increased by 83.0 % (from 4.71 J/cm3 to 8.62 J/cm3) with charging-discharging efficiency of 60 % at 80 °C. Moreover, the F-A-F-A-F composite achieves an excellent stability after 40,000 cycles. This composite has a wide range of potential applications in the field of traditional dielectric capacitor due to its good energy storage performance and cycle stability.
{"title":"Excellent energy storage performance of multi-alternating-layer structured PMMA/PVDF dielectric composite at high-temperature","authors":"Shaohua Wang , Yue Zhang , Guowei Hao , Yue Wang , Zheng Gong , Changhai Zhang , Yongquan Zhang , Tiandong Zhang , Qi Wang","doi":"10.1016/j.polymer.2024.127772","DOIUrl":"10.1016/j.polymer.2024.127772","url":null,"abstract":"<div><div>Polymer dielectric capacitors have high power density and are an integral component of electronic and power device. Currently, the limited energy density restricts their further application. In this research, a novel method was designed to optimize performance of PMMA/PVDF composite via an alternating stacked multi-layer structure. And, the five-alternating-layer of PVDF-PMMA-PVDF-PMMA-PVDF (F-A-F-A-F) composite has excellent dielectric properties, for instance, a better dielectric constant (4.52@1 kHz) and a low dielectric loss (0.034@1 kHz). The discharge energy density (<em>U</em><sub>e</sub>) of it is significantly larger than that of PMMA and PVDF. Particularly, the <em>U</em><sub>e</sub> of F-A-F-A-F composite is increased by 83.0 % (from 4.71 J/cm<sup>3</sup> to 8.62 J/cm<sup>3</sup>) with charging-discharging efficiency of 60 % at 80 °C. Moreover, the F-A-F-A-F composite achieves an excellent stability after 40,000 cycles. This composite has a wide range of potential applications in the field of traditional dielectric capacitor due to its good energy storage performance and cycle stability.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"315 ","pages":"Article 127772"},"PeriodicalIF":4.1,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142599627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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