文献类型：期刊文献

英文题名：A chitosan-based conductive double network hydrogel doped by tannic acid-reduced graphene oxide with excellent stretchability and high sensitivity for wearable strain sensors

作者：Song, Yaoting[1];Xing, Lu[1];Zou, Xinquan[1];Zhang, Chenyan[1];Huang, Zhonghuang[1];Liu, Wenxiu[1];Wang, Jikui[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200030, Peoples R China

年份：2024

卷号：258

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20235215279666);WOS:【SCI-EXPANDED(收录号:WOS:001142543800001)】；

语种：英文

外文关键词：Double network hydrogel; Conductive hydrogel; Wearable strain sensor

摘要：Conductive hydrogels usually suffer from weak mechanical properties and are easily destroyed, resulting in limited applications in flexible electronics. Concurrently, adding conductive additives to the hydrogel solution increases the probability of agglomeration and uneven dispersion issues. In this study, the biocompatible natural polymer chitosan was used as the network substrate. The rigid network employed was the Cit3-ion crosslinked chitosan (CS) network, and the MBA chemically crosslinked polyacrylamide (PAM) network was used as the flexible network. Tannic acid-reduced graphene oxide (TA-rGO), which has excellent conductivity and dis-persibility, is used as a conductive filler. Thus, a CS/TA-rGO/PAM double network conductive hydrogel with excellent performance, high toughness, high conductivity, and superior sensing sensitivity was prepared. The prepared CS/TA-rGO/PAM double network conductive hydrogels have strong tensile properties (strain and toughness as high as 2009 % and 1045 kJ/cm3), excellent sensing sensitivity (GF value was 4.01), a wider strain detection range, high cycling stability and durability, good biocompatibility, and antimicrobial properties. The hydrogel can be assembled into flexible wearable devices that can not only dynamically detect human move-ments, such as joint bending, facial expression changes, swallowing, and saying, but also recognize handwriting and enable human-computer interaction.