Flexible electrically conductive biomass-based aerogels for piezoresistive pressure/strain sensors

By Jieyu Huang, Dawei Li, Min Zhao, H. Ke, Alfred Mensah, Pengfei Lv, Xiaojuan Tian, Q. Wei. Chemical Engineering Journal, 2019

216 citations recorded by the source corpus.

Abstract Flexible, compressible and conductive aerogels were fabricated by incorporating polyaniline (PANI) into bacterial cellulose/chitosan (BC/CH) composites through facile freeze-drying technique. The PANI/BC/CH aerogel fabricated with the BC:CH weight ratio of 1:1 displayed the highest resistance response and showed extremely high sensitivity (1.41 kPa−1), low pressure detection (32 Pa), wide range of pressure deformation and extraordinary stability as a piezoresistive sensor. Polydimethylsiloxane (PDMS) was embedded into PANI/BC/CH aerogels to form PANI/BC/CH PDMS composites that displayed good stability under large mechanical deformation. Furthermore, applications of PANI/BC/CH aerogels and PANI/BC/CH/PDMS composites in piezoresistive sensors for wearable devices were also reported, which could detect human motions, ranging from joint movement to speech recognition, thus suggesting feasibility in health monitoring systems.

Subfields: Biomedical Engineering, Electrical and Electronic Engineering, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/f076e986674696b7e9a2c20f5c7fa143f780a331