▎ 摘　　要

NOVELTY - Forming a graphene functionalized carbon nanotube polymer composite comprises: functionalizing many carbon nanotubes using conducting functional molecules to form a composite nanofiller; and embedding the nanofiller within a polymer material to form the nanotube polymer composite. USE - The method is useful for forming graphene functionalized carbon nano tube polymer composite that forms a sensor and/or an actuator, and is used in electromechanical strain sensor (all claimed), chemical and biological sensing instruments, strain sensing applications, radiation protecting applications, transparent conductors, electrode materials for recharge lithium ion secondary batteries, fuel cells and solar cells. ADVANTAGE - The method is simple and cost-effective and forms composite that facilitates strain sensing in multiple directions and has high strain guage factor, enhanced electrical properties and high chemical resistance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) the graphene functionalized carbon nanotube polymer composite comprising: the carbon nanotubes; at least one graphene layer disposed around the carbon nanotubes to form the composite nanofiller; and the polymer material embedding the composite nanofiller; and (2) an electromechanical strain sensor comprising: the composite nanofiller having carbon nanotubes coated by graphene layer; and a polyvinylidene fluoride matrix embedding the composite nanofiller.