▎ 摘　　要

NOVELTY - Synthesis of cellulose film-based sensor involves (1), ultrasonically dispersing nano-cellulose to obtain nano-cellulose suspension, (2), mixing with a weak acid solution to obtain surface-modified nano-cellulose suspension, (3), centrifuging several times, freezing and drying to obtain surface-modified nano-cellulose powder, (4), preparing weak acid solution, adding the nano-cellulose powder, stirring to obtain multi-branched nano-cellulose surface grafted with multi-carboxyl group suspension, (5), centrifuging several times, freezing and drying to obtain multi-branched nano-cellulose surface grafted with multi-carboxyl group powder, (6), ultrasonically dispersing a conductive substance to obtain a conductive suspension, (7), adding the multi-branched nano-cellulose surface grafted with multi-carboxyl group powder obtained in step (5) into the conductive suspension and ultrasonically dispersing to obtain a nano-cellulose conductive polymer, and (8), filtering. USE - Synthesis of cellulose film-based sensor used for artificial intelligence, human health monitoring by attaching to human skin for real-time monitoring of temperature, humidity, strain, and other signals, and flexible electronic sensors. ADVANTAGE - The sensor has excellent flexibility, air permeability, stable electrical conductivity, and ability to sense thermal signals.