文献类型：期刊文献

英文题名：Skin-inspired ultra-tough, self-healing anisotropic wood-based electronic skin for multidimensional sensing

作者：Zhang, Yongyue[1,2] Fu, Zongying[2] Wu, Tong[2] Ren, Bohua[2] Chen, Jiaxing[2] Xie, Feifan[2] Leng, Weiqi[1] Shi, Jiangtao[1] Lu, Yun[2]

第一作者：Zhang, Yongyue

通信作者：Shi, JT[1];Lu, Y[2]

机构：[1]Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing 210037, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2024

卷号：496

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20242916718552);Scopus(收录号：2-s2.0-85198608794);WOS:【SCI-EXPANDED(收录号:WOS:001274722100001)】；

基金：Funding This research was funded by the This work is supported by the Na-tional Natural Science Foundation of China for Excellent Yong Scholar (Grant No. 32122058) , National Natural Science Foundation of China (Grant No. 32371797) .

语种：英文

外文关键词：Wood-based functional materials; Self-healing; Flexible sensing; Sustainable; Skin bionic materials

摘要：Skin is a flexible and stretchable sensor composed of anisotropic dermis (DM) and repairable epidermis (EM). It repairs itself when damaged and has a multi-dimensional sensing system that can assist the body in performing some complex multi-dimensional movements. Inspired by skin, we utilized natural wood as the skeleton and for the first time designed a low-cost, double-layer structure wood-based electronic skin (wood-eskin). Simple chemical treatments were employed to directionally regulate the ray structure of natural wood and to enhance its porosity. Subsequently, physical freeze-thawing was employed to facilitate the formation of an entangled network structure between the PVA solution and the wood nanofibers. Wood-eskin with multi-dimensional sensing was obtained by further introducing ions by immersing in salt solution. In comparison to the majority of contemporary bionic e-skins, wood-eskin exhibits superior mechanical properties. Additionally, it is capable of performing complex deformations, such as bending and knotting. After fracture, wood-eskin can also repair itself and recover similar to 94 % of its mechanical properties. The oriented arrangement of cellulose nanofiber channels gives wood-eskin a multidimensional sensing capability that can be used to monitor more complex body movements. The low-cost, biodegradable wood-eskin exhibits similar functionality to human skin, and its potential for biomedical and bionic robotics applications is considerable.