Output Performance of the Triboelectric Nanogenerator with Carboxymethylated Cellulose Nanofiber and Perfluoroalkoxy Alkane Films

The carboxymethylated cellulose nanofiber (CM-CNF) and perfluoroalkoxy alkane (PFA) films were used for the fabrication of triboelectric nanogenerator (TENG). The fabrication of CM-CNF/PFA TENG was simply done by origami based folding technique. After drying the CM-CNF suspension at room temperature, the thin film with desirable dimension was obtained for the fabrication of TENG. The fabricated TENG device consisted of 5-layer folded structure, and could be stretched, compressed and released based on the contact-separation mode while operation. The carboxymethylation reaction time and the degree of substitution had the effect on triboelectric charge generation of CM-CNF film. Also, mechanical strength of CM-CNF film was dependent on the carboxymethylation degree. The output performance of TENG with CM-CNF film having different carboxymethylation content was analyzed systematically. The direct influence of functionalized CNF through carboxymethylation was first time explored for the triboelectric charge generations in this work.