Muscle‐Inspired MXene Conductive Hydrogels with Anisotropy and Low‐Temperature Tolerance for Wearable Flexible Sensors and Arrays. (16th August 2021)

• Record Type: Journal Article
• Authors: Feng, Yubin; Liu, Hou; Zhu, Weihang; Guan, Lin; Yang, Xinting; Zvyagin, Andrei V.; Zhao, Yue; Shen, Chun; Yang, Bai; Lin, Quan
• Is Part Of: Advanced functional materials. Volume 31:Number 46(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-08-16
• Subjects: anisotropy -- conductive hydrogels -- flexible sensor -- low‐temperature tolerance -- muscle‐inspired -- MXene; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202105264
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Conductive hydrogels as flexible electronic devices, not only have unique attractions but also meet the basic need of mechanical flexibility and intelligent sensing. How to endow anisotropy and a wide application temperature range for traditional homogeneous conductive hydrogels and flexible sensors is still a challenge. Herein, a directional freezing method is used to prepare anisotropic MXene conductive hydrogels that are inspired by ordered structures of muscles. Due to the anisotropy of MXene conductive hydrogels, the mechanical properties and electrical conductivity are enhanced in specific directions. The hydrogels have a wide temperature resistance range of −36 to 25 °C through solvent substitution. Thus, the muscle‐inspired MXene conductive hydrogels with anisotropy and low‐temperature resistance can be used as wearable flexible sensors. The sensing signals are further displayed on the mobile phone as images through wireless technology, and images will change with the collected signals to achieve motion detection. Multiple flexible sensors are also assembled into a 3D sensor array for detecting the magnitude and spatial distribution of forces or strains. The MXene conductive hydrogels with ordered orientation and anisotropy are promising for flexible sensors, which have broad application prospects in human–machine interface compatibility and medical monitoring. Abstract : Inspired by the ordered structure of muscles, MXene conductive hydrogels are anisotropic and can be used as wearable flexible sensors. The conductive hydrogels have the advantages of wide temperature tolerance range, high sensitivity and good stability. The flexible sensors can achieve motion detection through wireless technology and can be assembled into 3D arrays.