▎ 摘　　要

NOVELTY - Nano composite material comprises aramid fiber/polyvinyl alcohol composite material and functional nanomaterial compounded on the aramid fiber nanofiber/polyvinyl alcohol composite material. USE - The composite material is useful as a protective material in aerospace, military, automobile, and civil fields. ADVANTAGE - The method is simple, has mild conditions, is easy to operate and economical, can be prepared in a large scale, and is more suitable for large-scale production and promotion. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing nano composite material comprising (1) mixing the aramid fiber nano fiber material dispersion and polyvinyl alcohol solution to obtain the nano composite dispersion; (2) forming the nano-composite dispersion to obtain the composite material of the aramid nano-fiber/polyvinyl alcohol; (3) compounding the functional nanomaterial dispersion on the surface of the aramid nanofiber/polyvinyl alcohol composite material obtained in the above steps, obtaining the basic unit of the nano-composite material; before or after the composite of the functional nano-material dispersion liquid, further comprising a drying step; and (4) gluing the basic unit of the nano-composite material, and molding to obtain the nanocomposite material.