A Double-layer Carbon Nanotubes/Polyvinyl Alcohol Hydrogel with High Stretchability and Compressibility for Human Motion Detection
Abstract
With the development of technology and the improvement of living standards, hydrogel-based strain sensors have attracted more attention. However, fabrication of hydrogel strain sensors with desirable mechanical and piezoresistive properties is still challenging. Herein, a double-layer flexible hydrogel sensor is presented, which is made of carbon nanotubes (CNTs) and polyvinyl alcohol (PVA) with high stretchability up to 415% strain and supercompressibility to 92% strain, and considerable electrical conductivity (1.11 S m-1). The hydrogel sensors show great linearity throughout the detection range, excellent durability and stable relative resistance change (
