▎ 摘　　要

NOVELTY - A composite dispersing agent comprises surfactant and graphene oxide in a mass ratio of 0.1:1-9:1. The surfactant is sodium dodecyl sulfate, sodium dodecylbenzene sulfonate, cetyltrimethylammonium bromide, Triton 100 (RTM: polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether), and/or polyethylene glycol. USE - Composite dispersing agent is used for dispersing carbon nanomaterial in preparation of carbon nanomaterial conductive polymer composites (all claimed) used for antistatic components, electromagnetic shielding components, and conductive paint. ADVANTAGE - The composite dispersing agent provides excellent carbon-nanomaterial dispersing effect, and polymer composites having excellent conductivity with reduced contact resistance. The composite dispersing agent enables simple preparation of environmentally-friendly modified carbon nanomaterial. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) usage method of composite dispersing agent, which involves adding graphene oxide and surfactant in water, stirring and/or ultrasonically processing, adjusting pH to 3-12, adding carbon nanomaterial, stirring for 0.5-2 hours, and grinding for 1-30 minutes or ultrasonically processing for 0.2-2 hours to obtain a uniformly dispersed solution; and (2) preparation of carbon nanomaterial conductive composite, which involves adding polymer particles to carbon nanomaterial dispersion liquid, adding chemical reducing agent, stirring and mixing, brushing or spraying the mixture on a substrate, and volatilizing water.