▎ 摘　　要

NOVELTY - Tensile strain sensor material comprises a graphene aerogel layer, a metal network layer and an organic polymer elastic material overlapped on a graphene gas gel layer. The graphene gel layer is provided with a directionally arranged graphene sheet, where the vertical direction of the graphene sheet arranged in orientation is consistent with the overlapping direction. The directionally-connected graphene sheets are connected by graphene, and the organic polymer elastic material is filled in the pores between the pores of the silicon dioxide gel layer and the pores in the metal network layers. The tensile strain sensors are provided with multiple through holes penetrating through the overlap direction, so that the tensile-strain sensor material forms a grid-shaped hollow structure. USE - Tensile strain sensor material used in wearable electronic device, intelligent robot, medical monitoring instrument or bionic artificial limb field (claimed). ADVANTAGE - The tensile strain sensor material enables to realize high sensitivity in wide stretching range from micro-deformation condition to large deformation condition, and has good reliability and cycle stability; ensures mechanical integrity and stability of three-dimensional conductive network through design of second order structure, where stretching range of material is enlarged by designing first-order structure. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a tensile strain sensor, which comprises tensile strain sensor material, and lead wire electrically connected with tensile strain sensor material; (2) a method for preparing tensile strain sensor material, which involves: (a) dispersing graphene powder in water to obtain graphene ink; (b) injecting graphene ink in mold, where bottom of mold, which has multiple convex structures form grid array; (c) placing mold injected with graphene ink in liquid nitrogen for freezing, and forming; (d) making graphene ink form graphene ice layer, volatilization direction of liquid nitrogen is from bottom of mold to top portion; (e) coating metal liquid of grid distribution on graphene ice layer, and freezing; (f) drying graphene ice layer coated with metal liquid of grid distribution; (g) obtaining graphene gas gel layer, and metal grid layer; (h) injecting liquid organic polymer elastic material in graphene gas gel layer, and metal grid layer, then curing. DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram of tensile strain sensor material preparation. (Drawing includes non-English language text).