文献类型：期刊文献

英文题名：Mimicking skin cellulose hydrogels for sensor applications

作者：Zhang, Daihui[1,3] Jian, Junyu[1,3] Xie, Yitong[1,3] Gao, Shishuai[1,3] Ling, Zhe[3] Lai, Chenhuan[3] Wang, Jifu[1,3] Wang, Chunpeng[1,3] Chu, Fuxiang[1,3] Dumont, Marie-Josée[2]

第一作者：张代晖;Zhang, Daihui

通信作者：Zhang, Daihui

机构：[1] Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, National Engineering Laboratory for Biomass Chemical Utilization, Key Laboratory of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, Key Laboratory of Biomass Energy and Material, Nanjing, Jiangsu, 210042, China; [2] Department of Bioresource Engineering, McGill University, 21111 Lakeshore Rd., Sainte-Anne-de-Bellevue, QC, Canada; [3] Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China

年份：2021

卷号：427

外文期刊名：Chemical Engineering Journal

收录：EI(收录号：20212810627029)

语种：英文

外文关键词：Aniline - Architecture - Biocompatibility - Biomimetics - Cellulose - Crystallization - Musculoskeletal system - Network architecture - Recrystallization (metallurgy) - Self assembly - Shear thinning - Stiffness - Swelling

摘要：The soft electronics industry is booming. To integrate with soft tissues (e.g. skin), the materials must possess skin-like properties in terms of stretchability, toughness, elasticity, softness, self-stiffness, swelling resistance, and conductivity. Herein, a biocompatible cellulose biomimetic hydrogel (CBH) showing the characteristics of the skin is fabricated. The first step is the regulation of cellulose self-assembly to form a porous non-swelling supramolecular fiber skeleton. Then, the elastic polymers generate within the pores of skeleton. This design mimics the skin's structures by utilizing the crystallization behavior of cellulose. Importantly, the cellulose supramolecular network has significantly strengthened the resultant hydrogels with over a 45-fold increase in toughness, and it could reach 4.3 MJ/m3. Moreover, it shows enhanced properties in terms of stretchability, modulus, self-stiffness and elasticity. Investigation on the swelling resistance shows that the utilization of non-swelling porous cellulose skeleton can limit the swelling of CBH. Finally, the fabrication of conductive CBH is performed through the in-situ polymerization of aniline within CBH. It can retain the mechanical features due to the tunable swelling, and also be used as a sensitive and stable strain sensor to monitor human motions, even under an aqueous environment. The gauge factor within the range of 90% to 600% was 1.7. This study highlights the significance of utilizing original cellulose features and provides a new avenue to prepare high-performance strain sensors. ? 2021 Elsevier B.V.