Enhancing the Mechanical Properties of Hydrogels Based on Photo-Polymerizable π-Conjugated Polymers

IF 5.2 1区化学 Q1 POLYMER SCIENCE

Macromolecules Pub Date : 2025-09-24 DOI:10.1021/acs.macromol.5c01426

Yi Li, Tiezhu Piao, Yitong Bai, Jiani Wang, Xian Wu Cheng, Chunzhi Cui

引用次数: 0

Abstract

A common strategy to enhance the mechanical properties of hydrogels is the incorporation of covalent or noncovalent cross-linking mechanisms. The choice of suitable cross-linking materials and simplicity of the process are critical factors. In this study, vesicle-like photopolymerizable diacetylene (DA) assemblies were integrated into poly(vinyl alcohol) (PVA) hydrogel. Upon UV-irradiation, the mechanical properties of PVA hydrogel were gradually enhanced, accompanied by the formation of polydiacetylene (PDA) backbones. Compared with the pristine hydrogel, the tensile strength and Young’s modulus of PDA–PVA hydrogel increased 5.5- and 3.2-fold, respectively, owing to the combined effects of photopolymerization and hydrogen bonding between PDA vesicles and PVA chains. Moreover, the resulting hydrogel exhibited excellent energy dissipation capacity. The strategy proposed in this study, introducing photopolymerizable DA assemblies into hydrogels provides a promising new approach for enhancing mechanical properties of hydrogels.

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基于可光聚合π共轭聚合物的水凝胶力学性能研究

提高水凝胶力学性能的一种常用策略是结合共价或非共价交联机制。选择合适的交联材料和简单的工艺是关键因素。本研究将囊泡状光聚合二乙炔（DA）组装体整合到聚乙烯醇（PVA）水凝胶中。在紫外线照射下，PVA水凝胶的力学性能逐渐增强，并形成聚二乙炔（PDA）骨架。与原始水凝胶相比，PDA - PVA水凝胶的拉伸强度和杨氏模量分别提高了5.5倍和3.2倍，这是由于PDA囊泡与PVA链之间的光聚合和氢键的共同作用。制备的水凝胶具有良好的能量耗散能力。本研究提出的在水凝胶中引入可光聚合的DA组件的策略为提高水凝胶的力学性能提供了一条有前途的新途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Macromolecules 工程技术-高分子科学

CiteScore

9.30

自引率

16.40%

发文量

942

审稿时长

2 months

期刊介绍： Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.