文献类型：期刊文献

英文题名：Biomimic Conductive Hydrogel Based on Polyphenol-Modified Cellulose Nanocrystals for Flexible Mechano-sensors

作者：Yang, Bin[1];Jiang, Longfei[1];Luo, Songteng[1];Yao, Yuan[1];Cao, Yuanyuan[1];Li, Yongsheng[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Lab Low Dimens Mat Chem, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2026

卷号：18

期号：3

起止页码：5835

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20260720046410);WOS:【SCI-EXPANDED(收录号:WOS:001659219900001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (22472058), the Shanghai Pilot Program for Basic Research (22TQ1400100-13), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：conductive hydrogel; cellulose nanocrystals; tannic acid; strain sensor; interpenetrating hydrogel

摘要：Excellent mechanical properties and force-electric coupling are essential for flexible conductive hydrogels, enabling their applications in soft robotics, wearable sensors, and human-machine interfaces. However, such hydrogels often face a fundamental trade-off between mechanical strength and electrical sensitivity. Inspired by the "soft-hard" architecture strategy in biological mechanical tissues and mussel-inspired multimode interacting mechanisms, we report the fabrication of a composite conductive hydrogel with enhanced mechanical strength, fatigue resistance, universal surface adhesion, and highly sensitive mechano-sensing capabilities by incorporating tannic acid-modified cellulose nanocrystals (CNC@TA) into an interpenetrating polyacrylamide/poly(vinyl alcohol)/poly(acrylic acid)/Al3+ multinetwork hydrogel matrix. The TA functionalization provides the CNCs with abundant cross-linking and interaction sites, enabling strong bonding with the surrounding matrix through physical entanglements, hydrogen bonding, pi-pi stacking, and coordination interactions. The hydrogel exhibits universal adhesion to various substrates and achieves well-performed mechanical property with elongation up to 765%, tensile strength around 83 kPa, and toughness around 276 kJ/m3. Simultaneously, the coordinated Al3+ ions provide the hydrogel with excellent ionic conductivity and a high strain sensitivity (gauge factor of up to 2.7). With superior mechanical properties and force-electric coupling performance, this hydrogel holds broad application potential in flexible electronics, human-machine interaction devices, and biomimetic materials.