材料科学
淀粉
羧甲基纤维素
复合数
自愈水凝胶
脆性
生物相容性
复合材料
化学工程
高分子化学
生物化学
工程类
化学
冶金
钠
作者
Shengqu Liu,Xiaoyu Wang,Yinjie Peng,Zhisen Wang,Rong Ran
标识
DOI:10.1002/mame.202100198
摘要
Abstract Starch‐based hydrogel is widely used as an excellent biocompatibility and biodegradability material. However, due to the disadvantages of poor mechanical properties, brittleness, and low stretchability attribute that remains a challenge to prepare multifunctional starch hydrogel integrating high stretchability, strength, and conducting capacity. In this study, macromolecular microspheres with various wettability are successfully incorporated into the hydrogel prepared using the carboxymethyl starch and polyacrylamide cross‐linked by Fe 3+ and covalent cross‐linker, respectively. The obtained double‐network (DN) hydrogel performs good mechanical properties (the fracture stress 483 ± 38 kPa and the elongation at break 1615 ± 25%). Impressively, the obtained DN hydrogels by solvent soaking still maintain excellent mechanical strength and flexibility at −40 °C. Furthermore, it can be assembled to be a resistance‐type strain sensor to detect multiscale strain. Therefore, the strategy can shed light on the preparation of multifunctional starch‐based hydrogel for broad applications.
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