▎ 摘　　要

NOVELTY - Preparing para-nano-aramid fiber and graphene based high-conductivity composite paper involves obtaining a para-nano aramid fiber aqueous dispersion, where para-nano aramid fiber aqueous dispersion comprises 0.05-0.6 wt.% para-nano aramid fiber content, adding graphene and a dispersant capable of opening a van der Waals force between graphene in water, and uniformly dispersing water, graphene and a dispersant to obtain graphene aqueous dispersion, where graphene aqueous dispersion comprises 0.001-5 wt.% graphene aqueous dispersion. The para-nano aramid fiber aqueous dispersion and the graphene aqueous dispersion are mixed in a weight ratio of 1:0.1-1 to form a mixed solution. The mixed solution is sequentially subjected to net forming, press dehydration, drying, and calendering to obtain the desired product. USE - Method for preparing para-nano-aramid fiber and graphene based high-conductivity composite paper. ADVANTAGE - The method uses graphene, and simultaneously adds a specific dispersant capable of opening the van der Waals force between graphenes to overcome the defect that graphene is not easily dispersed. It does not need to prepare graphene oxide (GO), and does not need to perform a subsequent step of reducing graphene oxide (RGO), which greatly simplifies the preparation process. The method also avoid the environmental pollution caused by the steps of producing graphene oxide (GO) and reducing graphene oxide (RGO), and also save a lot of resources. The obtained product has excellent thermal and electrical properties due to presence of graphene.