▎ 摘　　要

NOVELTY - The method involves coating electrolyte solution on the surface of the bio-based material, drying and soaking in graphene oxide dispersion liquid, and drying to obtain an intermediate material. The obtained intermediate material is carbonized and separated to obtain a hollow-tubular graphene. The shape of bio-based material is cylindrical. The bio-based material is selected from rush, straw, reed, green bristlegrass, and wood. USE - Preparation method of hollow tubular graphene used in field of electromagnetic shielding material and sensor material (all claimed). ADVANTAGE - The method enables to prepare hollow tubular graphene that has excellent compression recovery performance, conductive, rebound, compression rate and other comprehensive performance, and has good conductivity, capable of compressing and rebounding, large compression rate, and controllable thickness. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a polymer conductive material. DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the hollow tubular graphene.