▎ 摘　　要

NOVELTY - The preparation method involves preparing flexible material porous polydimethylsiloxane by filling method. The graphene oxide solution is then loaded onto porous polydimethylsiloxane. The polydimethylsiloxane backbone is immersed in the graphene oxide solution. The liquid graphene oxide is dried to obtain three-dimensional graphene oxide. The three-dimensional graphene oxide is reduced after drying. A patterned electrode is printed on the three-dimensional graphene using a conductive silver paste to obtain a three-dimensional graphene flexible strain sensor. The curing agent is a polydimethylsiloxane curing agent. USE - Preparation method of three-dimensional graphene flexible strain sensor used for converting human or environmental stimuli into detectable signals, and used in electronic skin devices, human motion detection, human health detection and other fields. ADVANTAGE - The method enables to prepare three-dimensional graphene flexible strain sensor with low preparation cost, high sensitivity, high flexibility combined with graphene, high carrier mobility, ultra-wide spectral response and high sensitivity to micro-strain to realize the real-time monitoring of vital characteristics of human body such as heartbeat, pulse and respiration. DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart of the preparation method of the three dimensional graphene strain sensor.