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-Josee[2]

第一作者：Zhang, Daihui;张代晖

通信作者：Zhang, DH[1];Chu, FX[1]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Natl Engn Lab Biomass Chem Utilizat,Key Lab Bioma, Key Lab Chem Engn Forest Prod,Natl Forestry & Gra, Nanjing 210042, Jiangsu, Peoples R China;[2]McGill Univ, Dept Bioresource Engn, 21111 Lakeshore Rd, Ste Anne De Bellevue, PQ, Canada;[3]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Jiangsu, Peoples R China

年份：2022

卷号：427

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;Scopus(收录号：2-s2.0-85109500250);WOS:【SCI-EXPANDED(收录号:WOS:000729781800007)】；

基金：We acknowledge the support from the National Natural Science Foundation of China (31890774) , Fundamental Research Funds for the Central Nonprofit Research Institution of Chinese Academy of Forestry (CAFYBB2021QB004) , National Natural Science Foundation for Youth (32001283) and National Key R&D Program of China (2017YFE0106800) .

语种：英文

外文关键词：Cellulose; Self-assembly; Biomimetic hydrogel; Strain sensor

摘要：The soft electronics industry is booming. To integrate with soft tissues (e.g. skin), the materials must possess skinlike 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, selfstiffness 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.