Chemically Functionalized Cellulose Nanofibrils for Improving Triboelectric Charge Density of a Triboelectric Nanogenerator
Shuangxi Nie, Chenchen Cai, Xuejiao Lin, Chenyuan Zhang, Yanxu Lu, Jilong Mo, Shuangfei Wang
Abstract
Excellent triboelectric charge density and hydrophobicity are achieved on cellulose nanofibrils (CNFs) by employing a simple and environmentally friendly approach to aminosilane modification of a CNF film. The positive charges on the CNF surface obtain gigantic enhancement, and a CNF-based triboelectric nanogenerator (TENG) with enhanced performance and moisture resistance is prepared. The performance of this functional CNF-based TENG can show outstanding output stability when the environmental humidity is 70%. Meanwhile, this TENG can respond to a variety of human activities, including pressing, stretching, bending, and twisting, indicating outstanding flexibility, and it can still be used to monitor the state of human movement in a human sweat environment. This work is expected to provide more insights and possibilities for application of such a functional CNF-based TENG in self-powered wearable electronics.