▎ 摘　　要

Flexibility electrode with high stretchability, electrical conductivity, and good mechanical properties are desirable, owing to their promising applications in electronic circuit and human motion monitoring systems. In order to prepare a conductive composite material, the graphene (GE) was used as a conductive filler and polydimethylsiloxane (PDMS) as a polymeric matrix. Graphene has high electrical conductivity, which can be hybrided to PDMS to form graphene/polydimethylsiloxane (GE/PDMS) conductive film using a simple spin-coating method. The electrical resistivity of the GE/PDMS film was further decreased to 9.4 Omega cm at a graphene loading of 25 wt%. The GE/PDMS films show excellent stability and were used as a sandwich structured PDMS-GE/PDMS-PDMS flexible strain sensor. The graphene strain sensor has been studied with small size and high sensitivity. Choosing a weak human motion (fingers bending) to test significant resistance changes and the small-scale sensitivity.