▎ 摘　　要

NOVELTY - Functionalized graphene-based flexible strain sensor comprises flexible resin substrate and functional graphene conductive film embedded in the substrate. The functionalized graphene conductive film comprises functionalized graphene sheet, modifying agent and metal ion. The modifying agent and metal ion are distributed between the functionalized graphene sheets and bridging adjacent functionalized graphene sheets. The modifying agent is a compound including amino or/and hydroxy group. USE - The sensor is useful in flexible wearable device (claimed). ADVANTAGE - The sensor: reduces the slippage in the circulating and stretching process; improves tensile cycle stability of the strain sensor based on the functionalized graphene conductive film; and does not reduces the resistance peak of the strain sensor along with the stretching cycle. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the functionalized graphene-based flexible strain sensor.