Sisal Cellulose Paper Based Triboelectric Nanogenerator with High Performance for Detection of Chemical Group Substitution Degree

Abstract

Cellulose-derived materials have attracted extensive attention for applications in advanced electronics due to their abundance, low cost, light weight, and sustainability. Here, we report a paper-based triboelectric nanogenerator (TENG) which was made of sisal cellulose as the friction layer. The effects of the surface morphology, structure, and dielectric properties of sisal cellulose paper (SCP) on the output performance of SCP-TENG were discussed. It is found that the electrical output performance of the SCP-TENG can be improved and controlled by chemically modifying SCP with different polar groups of -NO 2 , -COCH 3 , -Cl, -Br, -CH 3 , -C 2 H 5 , which is closely related to the dielectric constant change of SCP. Among them, the dielectric constant of the nitrated SCP is the highest, and the electrical output performance of the corresponding SCP-TENG also exhibits the highest, with the short-circuit current, open-circuit voltage, charge and power density improving to 20.78 μA, 198 V, 103 nC/m 2 , 827.03 mW/m 2 , from 6.13 μA, 118 V, 53 nC/m 2 , and 256.97 mW/m 2 , respectively. Based on the linear relationship between the current intensity of the modified SCP-TENG and the degree of substitution of different groups, a chemical sensor for detecting the degree of group substitution was successfully fabricated. This work provides a new idea for broadening the application field of TENG.

Keywords: sisal, TENG, chemical modification, polarity, dielectric constant