▎ 摘　　要

NOVELTY - Filling type flexible strain sensing material comprises modified polyvinyl alcohol prepared by reacting polyvinyl alcohol and succinic anhydride, the molar ratio of carboxy groups and hydroxy groups on the molecular chain of the modified polyvinyl alcohol is 1:10-100, the modified nano-metal/graphene composite is prepared by reacting amino-terminated hyperbranched polymer, graphene oxide and nano-metal precursor, the mass percentage of nano-metal in the modified nano-metal/graphene composite is 10-50 wt.%, the mass percentage of the amino-terminated hyperbranched polymer is 5-40 wt.%, and the balance is graphene, and at least part of the amino groups on the modified nano-metal/graphene composite are condensed with at least part of the carboxy groups in the modified polyvinyl alcohol, the mass percentage of the modified nano metal/graphene composite in the filled flexible strain sensing material is 8-30 wt.%. USE - Used as filling type flexible strain sensing material. ADVANTAGE - The filling type flexible strain sensing material: exhibits excellent electrical properties; and has certain elastic and tensile properties. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing filling type flexible strain sensing material comprising (i) preparing modified polyvinyl alcohol and modified nano-metal/graphene composites, and (ii) mixing modified polyvinyl alcohol with the modified nano-metal/graphene composite, then heating and reacting to obtain product A, and (iii) post-processing the product A to obtain final product.