摘要
水凝胶摩擦纳米发电机(H-TENG)因其卓越的机械柔韧性和导电性,成为可穿戴电子产品领域备受人们关注的柔性材料器件。然而,水凝胶在传统聚合过程中存在的高能耗与耗时缺陷,以及极端环境或机械损伤下电学性能衰减与力学失效问题,严重制约了H-TENG的实际应用。针对上述问题,开发了一种基于多酚-金属离子催化系统的自愈合双网络水凝胶,适用于水凝胶传感器和H-TENG。该材料体系通过动态氧化还原反应与Fe^(3+)-木质素磺酸钠(SLS)金属配位协同作用,实现了PAM-CMC双网络结构水凝胶的室温快速交联,无需外加热引发。同时,双网络结构及其动态配位键与氢键的协同能量耗散机制赋予了水凝胶优异的机械性能和自愈合特性。作为水凝胶传感器和H-TENG表现出稳健的传感性能和优异的自供电行为。本研究为具有可靠输出性能和传感特性的环境适应性自愈合H-TENG提供了一个应用前景广泛的材料体系。
Hydrogel-based triboelectric nanogenerators(H-TENG)have emerged as promising flexible devices for wearable electronics owing to their notable mechanical flexibility and electrical conductivity.However,the high energy consumption and time-intensive nature of conventional hydrogel polymerization processes,combined with the degradation of electrical properties and mechanical failure under extreme mechanical or environmental conditions,have severely limited their practical application.To address these challenges,this study presents a self-healing dual-network hydrogel engineered via a polyphenolmetal ion catalytic system for hydrogel sensors and H-TENG.The hydrogel is synthesized through dynamic redox reactions and metal-ligand coordination,utilizing sodium lignin sulfonate(SLS)and Fe^(3+)ions,which enable the rapid crosslinking of a polyacrylamide-carboxymethyl cellulose(PAM-CMC)dual-network hydrogel without energy-intensive thermal polymerization.The synergistic integration of dynamic metal coordination and hydrogen bonding confers the hydrogel with enhanced mechanical properties and autonomous self-healing capabilities.As a multifunctional platform,the material demonstrated stable strain-sensing responsiveness and consistent triboelectric output,even after severe mechanical damage.This study establishes an environmentally adaptive hydrogel system for self-healing H-TENG,exhibiting reliable performance across broad applications.
作者
刘玉森
王孟朝
周迅
岳兵兵
LIU Yu-sen;WANG Meng-chao;ZHOU Xun;YUE Bing-bing(School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《高分子通报》
北大核心
2025年第8期1267-1279,共13页
Polymer Bulletin
基金
国家自然科学基金(基金号22105128)。
