Bioinspired sandwich-structured pressure sensors based on graphene oxide/hydroxyl functionalized carbon nanotubes/bovine serum albumin nanocomposites for wearable textile electronics. (December 2022)

• Record Type: Journal Article
• Authors: Guo, Xiaohui; Hong, Weiqiang; Zhao, Yunong; Zhu, Tong; Li, Hongjin; Zheng, Guoqing; Wang, Jingyi; Tang, Guopeng; Cao, Jiaxu; Wang, Yifan; Yang, Jinyang; Zhang, Huishan; Zhou, Deyi; Feng, Rui; Xu, Decheng; Hong, Qi; Xu, Yaohua
• Is Part Of: Composites. Volume 163(2022)
• Publication Date: 2022-12
• Subjects: A. Fibres -- A. Multifunctional composites -- A. Polymer-matrix composites (PMCs) -- B. Electrical properties; Composite materials -- Periodicals; Manufacturing processes -- Periodicals; Composite materials; Manufacturing processes; Periodicals; 620.11805
• DOI: 10.1016/j.compositesa.2022.107240
• Languages: English
• ISSNs: 1359-835X

Abstract

Highlights: Bioinspired pressure sensors were fabricated based on facile layer-by-layer (LBL) self-assemble and dip-coating methods. Hydrogen bond and electrostatic interactions were adopted to improve adhesion efficacy of the substrate with nanomaterials. The textile-based bioinspired pressure sensors exhibited enhanced pressure sensing performance. The applications monitoring limb-kinetic and finger motions, and grasping motions using wearable were demonstrated. Abstract: Herein, inspired by the tactile perception architecture of human skin, including the epidermis and touch receptor, skin-like flexible pressure sensors were fabricated via the assembly of a sandwich structure composed of an encapsulation layer (bionic epidermis), a piezoresistive sensing layer (bionic touch receptor), and a transducer layer. The piezoresistive sensing layer composed of graphene oxide/ hydroxyl functionalized carbon nanotubes/bovine serum albumin (GO/CNTs/BSA) nanocomposites with wavy microstructures was fabricated using layer-by-layer (LBL) self-assembly technology. The mechanisms of hydrogen bond and electrostatic interactions may improve the adhesion efficacy of the textile substrate with conductive nanomaterials. Based on the skin-like architecture for pressure sensing, the sensor exhibited the sensing characteristics, including wide pressure-detecting range (0∼171 kPa), high sensitivity (2.456 kPa −1 ), rapid response/recovery time (225 ms and 50 ms), and outstanding durability (2000 cycles). Our work provide references for textile-based electronic devices that can be applied to intelligent robotics, wearable monitoring, and man–machine interaction.