Polymer International最新文献

Titanium oxide hydrates as versatile polymer crosslinkers and molecular-hybrid formers 作为多功能聚合物交联剂和分子杂化形成剂的氧化钛水合物

IF 2.9 4区化学 Q2 POLYMER SCIENCE

Polymer International

Pub Date : 2024-10-05 DOI: 10.1002/pi.6702

Marlow M. Durbin, Irene Votta, Alex H. Balzer, Michal Procházka, Marian Valentin, Mária Omastová, Natalie Stingelin

Molecular hybrid materials based on widely available polymers crosslinked with an inorganic species have received increasing interest for their unique property sets outside of the usual range of commodity plastics and/or nanocomposites. Here, we provide a mini-review on molecular hybrids based on metal oxide hydrates—compounds that readily react with, for example, hydroxylated polymers to form inorganic:organic materials systems with many desirable features and properties. Focusing on titanium oxide hydrates, we discuss here that such molecular hybrids can exhibit a broad refractive index range in addition to an increased glass transition temperature, mechanical stiffness and swelling resistance in comparison to the neat polymer, which illustrates that such hybrid systems offer a new, low-cost, robust and versatile functional materials platform with great promise for, for example, solution-processed photonics, catalysts and antimicrobial coatings. Generally, our mini-review seeks to provide a concise and accessible overview of titanium oxide hydrate:polymer hybrid systems, focusing on their unique properties and processability as well as their broad and largely untapped potential as functional materials. © 2024 The Author(s). Polymer International published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

基于与无机物交联的广泛可用聚合物的分子杂化材料，因其超出普通商品塑料和/或纳米复合材料范围的独特性能而受到越来越多的关注。在此，我们将对基于金属氧化物水合物的分子杂化材料进行小型综述--这种化合物很容易与羟基聚合物等发生反应，形成具有许多理想特性和性能的无机：有机材料系统。以氧化钛水合物为重点，我们在此讨论，与纯聚合物相比，这种分子杂化物除了能提高玻璃化转变温度、机械刚度和抗溶胀性之外，还能显示出宽广的折射率范围，这说明这种杂化物体系提供了一种新型、低成本、坚固耐用且用途广泛的功能材料平台，在溶液加工光子学、催化剂和抗菌涂层等方面大有可为。总体而言，我们的微型综述旨在提供有关氧化钛水合物：聚合物杂化体系的简明易懂的概述，重点关注其独特的性能和可加工性，以及作为功能材料尚未开发的广泛潜力。© 2024 作者简介国际聚合物》由 John Wiley & Sons Ltd 代表化学工业协会出版。

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引用次数: 0

Natural polymers for emerging technological applications: cellulose, lignin, shellac and silk 用于新兴技术应用的天然聚合物：纤维素、木质素、虫胶和蚕丝

IF 3.2 4区化学 Q2 POLYMER SCIENCE

Polymer International

Pub Date : 2024-09-18 DOI: 10.1002/pi.6697

Mihai Irimia‐Vladu, Niyazi Serdar Sariciftci

In an effort to stave off the growth of electronic waste (e‐waste) that poses a critical environmental dilemma, scientists often look into nature as an unending inspirational pool of materials and chemical processes that ensure functionality, performance and safe dissolution at the end of life cycle. This short review highlights only four organic polymer materials of natural origin (i.e. cellulose, lignin, shellac and silk) from the very large pool of natural (bio)polymeric materials and looks not only into the recent developments at the industrial scale but also into the emerging niche applications of these materials, while highlighting their implementation into electronics and sensor development. This review exemplifies that natural polymeric materials have great potential for the development of eco‐friendly electronics, in other words the class of industrial products that has carefully considered the important issues of biocompatibility, biodegradability (even compostability), cost of production and energy expanded in production (i.e. the carbon footprint). © 2024 The Author(s). Polymer International published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

电子垃圾对环境造成严重危害，为了遏制电子垃圾的增长，科学家们常常将大自然视为一个无穷无尽的材料和化学过程的灵感源泉，这些材料和化学过程可确保产品的功能、性能以及在生命周期结束时的安全溶解。这篇简短的综述从庞大的天然（生物）聚合物材料库中挑选出四种源于自然的有机聚合物材料（即纤维素、木质素、虫胶和蚕丝），不仅介绍了这些材料在工业规模上的最新发展，还介绍了这些材料的新兴利基应用，同时强调了它们在电子和传感器开发中的应用。本综述表明，天然聚合材料在开发生态友好型电子产品方面具有巨大潜力，换句话说，这类工业产品已仔细考虑了生物兼容性、生物降解性（甚至可堆肥性）、生产成本和生产过程中的能源消耗（即碳足迹）等重要问题。© 2024 作者。国际聚合物》由 John Wiley & Sons Ltd 代表化学工业协会出版。

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引用次数: 0

Investigate Performance of ATGF nanocomposite based on guar gum polymer for adsorption of Congo Red dye and alpha lipoic acid drug from wastewater: study kinetics and simulation 研究基于瓜尔胶聚合物的 ATGF 纳米复合材料吸附废水中刚果红染料和阿尔法硫辛酸药物的性能：动力学研究与模拟

IF 3.2 4区化学 Q2 POLYMER SCIENCE

Polymer International

Pub Date : 2024-09-07 DOI: 10.1002/pi.6691

Fatemeh Tazimifar, Pegah Nazarizadeh, Ali Reza Akbarzadeh

In this study, the synthesized nanocomposite novel arginine/thiourea/guar gum/ferrite (ATGF) adsorbent was evaluated for the adsorption of alpha lipoic acid (ALA) and Congo Red (CR) from wastewater. The synthesized nanocomposite was examined by Brunauer–Emmett–Teller theory (BET), Termal gravimetric analysis (TGA), Fourier transform infrared spectrometer (FT‐IR), field emission scanning electron microscopy (FE‐SEM), X‐ray Diffraction (XRD), Vibrating sample magnetometer (VSM), and energy dispersive X‐ray (EDX). For the removal of ALA and CR from aqueous solution, the capacity of the nanocomposite was investigated by working on a series of experiments such as the effect of adsorbent dose, initial concentration, contact time, pH and temperature. The adsorption kinetics of these two pollutants were investigated using pseudo‐first‐order and pseudo‐second‐order velocity equations. The nanocomposite kinetics follow pseudo‐second‐order. Langmuir and Freundlich isotherms were investigated. The results show that the Langmuir isotherm model gives the maximum adsorption capacity of ALA as 96.93 mg g−1 and of CR as 229.34 mg g−1 on the nanocomposite. © 2024 Society of Chemical Industry.

本研究评估了合成的新型精氨酸/硫脲/瓜尔胶/铁氧体（ATGF）纳米复合吸附剂对废水中α-硫辛酸（ALA）和刚果红（CR）的吸附效果。布鲁纳-艾美特-泰勒理论（BET）、热重分析（TGA）、傅立叶变换红外光谱仪（FT-IR）、场发射扫描电子显微镜（FE-SEM）、X 射线衍射（XRD）、振动样品磁力计（VSM）和能量色散 X 射线（EDX）对合成的纳米复合材料进行了检测。通过一系列实验，如吸附剂剂量、初始浓度、接触时间、pH 值和温度的影响，研究了纳米复合材料去除水溶液中 ALA 和 CR 的能力。使用伪一阶和伪二阶速度方程研究了这两种污染物的吸附动力学。纳米复合材料的吸附动力学遵循伪一阶。研究了 Langmuir 和 Freundlich 等温线。结果表明，根据 Langmuir 等温线模型，纳米复合材料对 ALA 的最大吸附量为 96.93 mg g-1，对 CR 的最大吸附量为 229.34 mg g-1。© 2024 化学工业协会。

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引用次数: 0

Experimental evaluation of physicomechanical, tribological and optimality circumstances for Corchorus olitorius particle‐based composites 珊瑚虫颗粒基复合材料的物理力学、摩擦学和优化情况的实验评估

IF 3.2 4区化学 Q2 POLYMER SCIENCE

Polymer International

Pub Date : 2024-08-29 DOI: 10.1002/pi.6695

Vijay Kumar Mahakur, Santosh Kumar, Sumit Bhowmik, Promod Kumar Patowari

Researchers are diligently striving towards generating sustainable successors for man‐made fibers. Naturally derived fibers/fillers have gained much attention these days due to their use in the development of renewable and biodegradable components. This research emphasizes the physical, mechanical and tribological aspects of silanized Corchorus olitorius particle‐based thermoset composites. With the help of a contact lay‐up technique, varied weight fractions (0, 2.5, 5, 7.5, 10 and 12.5%)‐based composites as per ASTM standards were generated. The experimental results reveal that silanization promotes the interfacial relationship between particles of Corchorus olitorius and the matrix and also the established silanized particle‐based composites demonstrated a potential modest density feature. The minimal weight fraction‐based composite exhibited the best mechanical and wear‐resistant features. Furthermore, the interval‐valued intuitionistic fuzzy Schweizer–Sklar power weighted average approach has been developed as a distinctive structure for obtaining the most effective composite material for any further industrial applications. From this optimization strategy, the specimen with 5 wt% particle content is found to be the best, followed by the specimen with 7.5 wt% particle content. This work highlights the crucial function of surface modification techniques, especially silanization, in enhancing the effectiveness and stability of composites that include Corchorus olitorius particles. © 2024 Society of Chemical Industry.

研究人员正孜孜不倦地努力为人造纤维开发可持续的替代品。天然衍生纤维/填料因其可用于开发可再生和可生物降解部件而备受关注。这项研究强调了硅烷化欧鼠李颗粒热固性复合材料的物理、机械和摩擦学方面。在接触铺层技术的帮助下，按照 ASTM 标准生成了不同重量分数（0、2.5、5、7.5、10 和 12.5%）的复合材料。实验结果表明，硅烷化促进了欧石珊瑚颗粒与基体之间的界面关系，硅烷化颗粒基复合材料还显示出潜在的适度密度特征。基于最小重量分数的复合材料表现出最佳的机械性能和耐磨性能。此外，还开发了区间值直观模糊 Schweizer-Sklar 功率加权平均法，作为一种独特的结构，用于获得最有效的复合材料，以进一步应用于工业领域。根据这一优化策略，发现颗粒含量为 5 wt% 的试样效果最好，其次是颗粒含量为 7.5 wt% 的试样。这项工作凸显了表面改性技术，尤其是硅烷化技术，在提高含有欧石珊瑚颗粒的复合材料的有效性和稳定性方面的重要作用。© 2024 化学工业协会。

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引用次数: 0

Exploring biofiber properties and their influence on biocomposite tensile properties 探索生物纤维特性及其对生物复合材料拉伸特性的影响

IF 3.2 4区化学 Q2 POLYMER SCIENCE

Polymer International

Pub Date : 2024-08-29 DOI: 10.1002/pi.6696

Oluwafemi A. Oyedeji, Jocelyn Hess, Xianhui Zhao, Luke Williams, Rachel Emerson, Erin Webb

Biofibers serve as effective reinforcements for neat polylactic acid (PLA) in biocomposites, offering an attractive opportunity to decarbonize the manufacturing sector of the United States by displacing fossil‐based reinforcement fibers such as carbon fibers. Also, biofiber production can stimulate economic growth in rural economies, fueling sustainable development. PLA resins are commonly compounded with biofibers to create biocomposites suitable for additive manufacturing. PLA‐biofiber composites often exhibit better overall material properties than neat (pure) PLA, but the associations between biofiber properties and the material properties of their biocomposites remain largely unexplored. Hence, this research delves into a comprehensive exploration of diverse biofibers, scrutinizing their physical and chemical attributes, including size, shape, ash content and biochemical composition. The study meticulously analyzes the flow properties of each biofiber and elucidates the ultimate tensile strengths and Young's modulus of corresponding biocomposite samples. Noteworthy correlations between biofiber and biocomposite tensile properties are uncovered, shedding light on critical interrelationships. The study introduces an approach employing regression models to predict the ultimate tensile strength and Young's modulus of biocomposites. These models, validated with a cross‐validation technique, exhibit remarkable predictive accuracy, particularly in estimating ultimate tensile strength. © 2024 Oak Ridge National Laboratory managed by UT‐Battelle, LLC and The Author(s). Polymer International published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

在生物复合材料中，生物纤维可作为纯聚乳酸（PLA）的有效增强材料，取代碳纤维等化石基增强纤维，为美国制造业的去碳化提供了一个极具吸引力的机会。此外，生物纤维生产还能刺激农村经济增长，推动可持续发展。聚乳酸树脂通常与生物纤维复合，以制造适用于增材制造的生物复合材料。与纯聚乳酸相比，聚乳酸-生物纤维复合材料通常具有更好的整体材料特性，但生物纤维特性与其生物复合材料材料特性之间的关联在很大程度上仍未得到探索。因此，本研究对各种生物纤维进行了全面探索，仔细研究了它们的物理和化学属性，包括尺寸、形状、灰分含量和生化成分。研究细致分析了每种生物纤维的流动特性，并阐明了相应生物复合材料样品的极限拉伸强度和杨氏模量。研究发现了生物纤维和生物复合材料拉伸性能之间值得注意的相关性，揭示了关键的相互关系。研究介绍了一种采用回归模型预测生物复合材料极限拉伸强度和杨氏模量的方法。这些模型经过交叉验证技术的验证，显示出显著的预测准确性，尤其是在估计极限拉伸强度方面。© 2024 橡树岭国家实验室由UT-巴特尔有限责任公司和作者管理。国际聚合物》由 John Wiley & Sons Ltd 代表化学工业协会出版。

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引用次数: 0

Binary nanoconjugation of zein–methylcellulose for improving curcumin properties: solubility, controlled release and anticancer activity 改善姜黄素特性的玉米蛋白-甲基纤维素二元纳米共轭：可溶性、控释性和抗癌活性

IF 3.2 4区化学 Q2 POLYMER SCIENCE

Polymer International

Pub Date : 2024-08-28 DOI: 10.1002/pi.6694

Sana F Abaza, Nihal S Elbialy, Noha Mohamed

For cancer treatment, a novel nanocarrier has been developed, utilizing natural compounds. Zein protein (Z) and methylcellulose (MC) polysaccharide were formulated as a nanocarrier for nutraceutical curcumin (Cur). The zein–methylcellulose nanoconjugate (ZMC) appeared spherical/monodispersed in transmission electron microscopy images. Hydrodynamic sizes were 164 ± 20.2 and 190 ± 28.2 nm for ZMC and ZMC@Cur, respectively. For both formulations, zeta potential, differential scanning calorimetry, Fourier transform infrared spectroscopy and X‐ray diffraction analyses were conducted. Curcumin encapsulation efficiency was 92%, and its release profile was pH responsive. Using MTT assay, ZMC@Cur demonstrated a significant cytotoxic effect against MCF‐7 and HepG2, surpassing the impact of curcumin. This underscores the pivotal role of ZMC@Cur in enhancing curcumin properties, thereby potentiating cancer cell death. Compared with free curcumin, ZMC@Cur markedly promoted DNA damage in cancer cells, owing to precise curcumin targeting into the nucleus. Accordingly, the proposed bionanocomposite stands as an efficient vehicle for curcumin, showcasing its crucial role in combating cancer via improving the pharmaceutical properties of curcumin. © 2024 Society of Chemical Industry.

为治疗癌症，利用天然化合物开发了一种新型纳米载体。将玉米蛋白（Z）和甲基纤维素（MC）多糖配制成营养保健品姜黄素（Cur）的纳米载体。在透射电子显微镜图像中，玉米蛋白-甲基纤维素纳米共轭物（ZMC）呈球形/单分散状态。ZMC 和 ZMC@Cur 的水动力学尺寸分别为 164 ± 20.2 nm 和 190 ± 28.2 nm。对这两种配方进行了 zeta 电位、差示扫描量热仪、傅立叶变换红外光谱和 X 射线衍射分析。姜黄素的封装效率为 92%，其释放曲线对 pH 值有响应。利用 MTT 法，ZMC@Cur 对 MCF-7 和 HepG2 有显著的细胞毒性作用，其效果超过姜黄素。这凸显了 ZMC@Cur 在增强姜黄素特性从而促进癌细胞死亡方面的关键作用。与游离姜黄素相比，ZMC@Cur 能显著促进癌细胞的 DNA 损伤，这是由于姜黄素能精确地靶向进入细胞核。因此，所提出的仿生复合材料是姜黄素的有效载体，通过改善姜黄素的药用特性，在抗癌方面发挥了重要作用。© 2024 化学工业协会。

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引用次数: 0

Poly(ether ketone ketone)/hollow silica filler substrates and application for sixth generation communication 聚醚酮酮/中空二氧化硅填料基材及在第六代通信中的应用

IF 2.9 4区化学 Q2 POLYMER SCIENCE

Polymer International

Pub Date : 2024-08-27 DOI: 10.1002/pi.6690

Xing-yu Wei, Zhi-wen Lei, Ning Ma, Tim Hsu, Ya-qiong Huang, Jen-taut Yeh

The influence of density and shape of hollow silicas (silica hollow tubes (SHT) or hollow glass microspheres (HGM)) on dielectric and heat-resisting characteristics of poly(ether ketone ketone) (PEKK)/SHT and PEKK/HGM films was systematically investigated. The dielectric characteristics of PEKK/SHT or PEKK/HGM films decrease to a minimum, as their SHT or HGM contents approach 8 or 20 wt%, respectively, and the minimum dielectric constant (ε_r) and dielectric loss (tan δ) of PEKK/SHT or PEKK/HGM films decrease visibly with decreasing SHT densities. By filling with 0.46 g cm⁻³ mean density of SHT or HGM fillers, the minimum ε_r and tan δ of PEKK/SHT films are somewhat smaller than those of PEKK/HGM films. The linear coefficient of thermal expansion (LCTE) values of PEKK/SHT or PEKK/HGM films reduce and their onset degradation temperature values increase gradually with increasing SHT and HGM contents. Low ε_r/tan δ (2.11/0.0022 and 2.2/0.0027 at 1 MHz), LCTE (35.5 × 10⁻⁶ and 31.2 × 10⁻⁶ °C⁻¹) and excellent heat-resisting properties favorable for sixth generation (6G) ultrarapid communication are realized for appropriately prepared PEKK/SHT and PEKK/HGM substrate films. The free-volume-hole characteristics of PEKK/HGM or PEKK/SHT films approach a maximum as SHT or HGM contents reach an optimum value of 8 or 20 wt%, respectively. © 2024 Society of Chemical Industry.

系统研究了空心二氧化硅（二氧化硅空心管（SHT）或空心玻璃微球（HGM））的密度和形状对聚（醚酮酮）（PEKK）/SHT 和 PEKK/HGM 薄膜介电和耐热特性的影响。随着 SHT 或 HGM 含量分别接近 8 或 20 wt%，PEKK/SHT 或 PEKK/HGM 薄膜的介电特性降至最低，并且 PEKK/SHT 或 PEKK/HGM 薄膜的最小介电常数（εr）和介电损耗（tan δ）随着 SHT 密度的降低而明显降低。通过填充平均密度为 0.46 g cm-3 的 SHT 或 HGM 填料，PEKK/SHT 薄膜的最小值 εr 和 tan δ 比 PEKK/HGM 薄膜略小。随着 SHT 和 HGM 含量的增加，PEKK/SHT 或 PEKK/HGM 薄膜的线性热膨胀系数（LCTE）值降低，开始降解温度值逐渐升高。适当制备的 PEKK/SHT 和 PEKK/HGM 基底薄膜具有低 εr/tan δ（2.11/0.0022 和 2.2/0.0027，1 MHz 时）、LCTE（35.5 × 10-6 和 31.2 × 10-6 ℃-1）和优异的耐热性能，有利于第六代（6G）超高速通信。当 SHT 或 HGM 含量分别达到 8 或 20 wt% 的最佳值时，PEKK/HGM 或 PEKK/SHT 薄膜的自由体积孔特性接近最大值。© 2024 化学工业协会。

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引用次数: 0

Functional and physicochemical characterization of marine exopolysaccharide derived from the novel bacterium Algoriphagus sp. K5R and its application towards biomineralization of gold and silver 从新型细菌 Algoriphagus sp. K5R 提取的海洋外多糖的功能和理化特性及其在金银生物矿化中的应用

IF 3.2 4区化学 Q2 POLYMER SCIENCE

Polymer International

Pub Date : 2024-08-27 DOI: 10.1002/pi.6693

Tixit Sagpariya, Nandita Srivastava, Sumeeta Kumari, Anil Kumar Pinnaka, Anirban Roy Choudhury

The widespread use of synthetic polymers in various industries has raised worldwide concerns regarding their ecological impact and effects on human health. As a result, biopolymers have emerged as a promising alternative. Among them, exopolysaccharides (EPSs) produced by microbes from terrestrial niches have been extensively studied. However, recent reports have indicated that microbes from marine environments can also produce unique EPSs that could serve as sustainable substitutes to meet the escalating demand for biopolymers. The present study, for the first time, reports EPS production from novel marine bacterium Algoriphagus sp. K5R for sustainable application development. Interestingly, physicochemical analyses suggest that EPS K5R is a high molecular weight (1190.63 kDa) heteropolysaccharide composed of galacturonic acid, glucose and mannose. To evaluate EPS production, growth and fermentation kinetics were performed, which revealed that it was a primary metabolite having a maximum production of 4.79 ± 0.57 g L−1 with 2% (w/v) glucose. Moreover, EPS K5R exhibits exceptional functional properties, namely high water‐holding capacity (720% ± 80.29%) and oil‐holding capacity (493.33% ± 49.74% for coconut oil and 533.32% ± 17.47% for olive oil), and non‐Newtonian pseudo‐plastic behavior which render it a promising candidate for application in the cosmetics and food industries. In fact, its anti‐oxidant capabilities make it an ideal biological reducing agent for metal nanoparticle synthesis. Overall, this study highlights the potential of marine EPSs for a diverse array of industrial applications. © 2024 Society of Chemical Industry.

合成聚合物在各行各业的广泛使用引起了全世界对其生态影响和人类健康的关注。因此，生物聚合物成为一种有前途的替代品。其中，由陆生环境中的微生物产生的外多糖（EPSs）已被广泛研究。然而，最近的报告表明，海洋环境中的微生物也能产生独特的 EPSs，可作为可持续的替代品来满足对生物聚合物不断增长的需求。本研究首次报道了新型海洋细菌 Algoriphagus sp. K5R 为可持续应用开发而生产的发泡聚苯乙烯。有趣的是，理化分析表明，EPS K5R 是一种由半乳糖醛酸、葡萄糖和甘露糖组成的高分子量（1190.63 kDa）杂多糖。为评估 EPS 产量，进行了生长和发酵动力学研究，结果表明 EPS 是一种初级代谢产物，在葡萄糖含量为 2% (w/v) 的情况下，最大产量为 4.79 ± 0.57 g L-1。此外，EPS K5R 还具有优异的功能特性，即较高的保水能力（720% ± 80.29%）和保油能力（椰子油为 493.33% ± 49.74%，橄榄油为 533.32% ± 17.47%），以及非牛顿假塑性行为，因此有望应用于化妆品和食品行业。事实上，橄榄油的抗氧化能力使其成为合成金属纳米粒子的理想生物还原剂。总之，这项研究强调了海洋 EPS 在各种工业应用中的潜力。© 2024 化学工业协会。

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引用次数: 0

Preparation of biodegradable poly(lactic acid)/poly[(butylene diglycolate)‐co‐furandicarboxylate] blends with excellent toughness and gas barrier performance 制备具有优异韧性和气体阻隔性能的可生物降解聚（乳酸）/聚[（丁烯二醇）-共呋喃二甲酸酯]共混物

IF 3.2 4区化学 Q2 POLYMER SCIENCE

Polymer International

Pub Date : 2024-08-27 DOI: 10.1002/pi.6692

Yong Yang, Jing Shen, Erxun Hu, Yajin Fang, Zhibo Xu, Juan Li

Poly(lactic acid) (PLA) is known as one of the most promising biodegradable polyesters, while inherent brittleness and insufficient gas barrier performance limit its potential application as a film material. Herein, poly[(butylene diglycolate)‐co‐furandicarboxylate] (PBDF) with excellent flexibility and good gas barrier properties was synthesized and then melt‐blended with PLA. Compared with neat PLA, the elongation at break of the PLA/PBDF20 blend increased more than 40 times and reached over 176.7%. In addition, its O2, CO2 and H2O permeability coefficients decreased by 21.3%, 50.8% and 46.3%, respectively. Moreover, the PLA/PBDF20 blend also exhibited better biodegradability, with a weight loss rate increasing from 2.7% of neat PLA to 19.0% after 5 weeks of composting. Notably, incorporation of a multifunctional epoxy compatibilizer (Joncryl ADR®‐4368) into the PLA/PBDF blends further enhanced their toughness and gas barrier performance, which could be attributed to the improvement of the miscibility between PLA and PBDF. © 2024 Society of Chemical Industry.

众所周知，聚乳酸（PLA）是最有前途的可生物降解聚酯之一，但其固有的脆性和不充分的气体阻隔性能限制了其作为薄膜材料的潜在应用。本文合成了具有优异柔韧性和良好气体阻隔性能的聚[（丁烯二醇）-共呋喃二甲酸酯]（PBDF），并将其与聚乳酸熔融共混。与纯聚乳酸相比，聚乳酸/PBDF20 共混物的断裂伸长率提高了 40 多倍，达到 176.7% 以上。此外，其氧气、二氧化碳和水的渗透系数分别降低了 21.3%、50.8% 和 46.3%。此外，聚乳酸/PBDF20 混合物还表现出更好的生物降解性，堆肥 5 周后，重量损失率从纯聚乳酸的 2.7% 增加到 19.0%。值得注意的是，在聚乳酸/PBDF 混合物中加入多功能环氧相容剂（Joncryl ADR®-4368）可进一步提高其韧性和气体阻隔性能，这可能归功于聚乳酸和 PBDF 之间混溶性的改善。© 2024 化学工业协会。

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引用次数: 0

Preparation of a starch derivative bearing chloroaniline groups and the evaluation of its hemolytic, cytotoxic and antibacterial activities 含氯苯胺基团的淀粉衍生物的制备及其溶血、细胞毒性和抗菌活性的评估

IF 3.2 4区化学 Q2 POLYMER SCIENCE

Polymer International

Pub Date : 2024-08-06 DOI: 10.1002/pi.6689

María Fernanda Valdez‐Valdés, Francisco Javier Enríquez‐Medrano, Alejandro Zugasti‐Cruz, Crystel Aleyvick Sierra‐Rivera, Eder Iván Martínez‐Mora, Gerardo de Jesús Sosa‐Santillán, Ernesto Oyervides‐Muñoz

A new starch derivative with antibacterial properties and non‐hemolytic effect was synthesized through the chemical grafting of 4‐chloroaniline onto the backbone of potato starch. In a first step, starch was extracted from potatoes grown in the region of Coahuila, Mexico, using the water steeping method. The hydroxyl groups (C5‐C6) of the native starch were oxidized using sodium periodate. The resulting dialdehyde was then chemically modified through a Schiff base reaction with 4‐chloroaniline. The chemical structure of this starch derivative was confirmed by Fourier transform infrared and 1H NMR spectroscopies, the thermal properties were analyzed by thermogravimetric analysis without finding significant changes and the product showed antibacterial activity against Gram‐negative E. coli and Gram‐positive S. aureus strains. Finally, the hemolytic and cytotoxic effects of native starch and its derivative were studied, showing no hemolytic effect on isolated human red blood cells and no cytotoxic effect; therefore, it can be considered biocompatible. © 2024 Society of Chemical Industry.

通过化学方法将 4-氯苯胺接枝到马铃薯淀粉的骨架上，合成了一种具有抗菌特性和非溶血性作用的新型淀粉衍生物。第一步，采用水浸法从墨西哥科阿韦拉地区种植的马铃薯中提取淀粉。原生淀粉的羟基（C5-C6）被高碘酸钠氧化。然后通过与 4-氯苯胺的希夫碱反应对生成的二醛进行化学修饰。傅立叶变换红外光谱和 1H NMR 光谱证实了这种淀粉衍生物的化学结构，热重分析对其热性质进行了分析，未发现明显变化，而且该产品对革兰氏阴性大肠杆菌和革兰氏阳性金黄色葡萄球菌菌株具有抗菌活性。最后，研究了原生淀粉及其衍生物的溶血效应和细胞毒性效应，结果表明其对离体人红细胞无溶血效应，也无细胞毒性效应，因此可视为具有生物相容性。© 2024 化学工业协会。

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引用次数: 0