Abstract

Conductive polymer composites (CPCs) strain sensors exhibit promising applications in flexible electronics, people’s health monitoring, etc. It remains a big challenge to develop a simple and cost-effective method to prepare CPCs with high conductivity, corrosion resistance, strong interfacial adhesion and high sensitivity. Here, we propose a facile “drop-casting and fluorination” strategy to fabricate superhydrophobic and highly electrically conductive coating by Ag precursor adsorption onto a commercially available elastic tape, subsequent chemical reduction and final fluorination. The Ag nanoparticles could not only construct the electrically conductive network but also greatly enhance the surface roughness. The contact angle and electrical conductivity of the coating can reach as high as 156° and 126 ​S/cm, respectively. When used for strain sensing, the superhydrophobic and conductive coating shows a high gauger factor (up to 7631 with the strain from 44% to 50%) and outstanding recyclability. The strain sensor could monitor different body joint motions with the stable and reliable sensing signals even after long time treatment in a corrosive solution.

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