A Flexible, Wearable, Humidity‐Resistant and Self‐Powered Sensor Fabricated by Chitosan‐Critic Acid Film and its Applications in Human Motion Monitoring and Energy Harvesting

Author:

Zhang Xing1,Ma Yanran1,Wang Yongfa1,Li Li1,Wang Peihong2,Wang Chunchang1ORCID

Affiliation:

1. Laboratory of Dielectric Functional Materials School of Materials Science & Engineering Anhui University Hefei 230601 China

2. School of Materials Science & Engineering Energy Materials and Devices Key Lab of Anhui Province for Photoelectric Conversion Anhui University Hefei 230601 China

Abstract

AbstractBeing a resource‐abundant natural material, chitosan shows good frictional electrical properties and has become one of the most used materials for triboelectric nanogenerators (TENGs). To improve water resistance and mechanical properties, herein, a strategy is proposed to modify the chitosan film by citric acid. The results show that both humidity‐resistant and mechanical properties of the modified films can be notably enhanced due to the formation of a network structure between chitosan molecular chains. Excellent output performance of 77.5 V and 2.66 µA is achieved in the TENG based on the modified film with a mass ratio of chitosan/citric acid = 3:1. Under a relative humidity (RH) of 80%RH, it can output 70.16% of the voltage compared to that under 20%RH. Self‐powered tactile sensor based on the TENG exhibits a sensitive response to pressure and bending and humidity resistance, giving the sensor tremendous promise for a wider range of human motion monitoring and energy harvesting.

Funder

Natural Science Foundation of Hebei Province

National Natural Science Foundation of China

Publisher

Wiley

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