▎ 摘　　要

NOVELTY - Flexible composite film material comprises base film, and functional coating compounded on base film. The functional coating includes activated carbon and graphene. USE - Flexible composite film material for use in composite membrane roll material with air purification function (claimed). ADVANTAGE - The flexible composite film material is a composite film material with certain flexibility and can be bent and folded, and has large gas permeation flux, large specific surface area, adjustable pore size and filtration effect, and can simultaneously achieve high-efficiency interception of ultra-fine dust and high-efficiency adsorption and purification of specific polluting gas, not only improves the overall conductivity of the membrane material, but also can adsorb charged bacteria in the air under the action of an applied voltage, and can also sterilize the bacteria adsorbed on the surface. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: 1. a method for preparing flexible composite membrane material, which involves: (a) mixing activated carbon, graphene, gas absorbent, binder and solvent to obtain functional coating slurry; (b) unwinding the base film and laying it flat; (c)compounding the obtained functional coating slurry on the base film, and drying to obtain a flexible composite film material; and 2. a composite membrane roll material with air purification function, which comprises: a flexible composite film material prepared by preparation method or the flexible composite film material is obtained by curling.