▎ 摘　　要

NOVELTY - Preparing fiber surface sizing agent based on carbon nano-tube-graphene oxide-(polyhedral oligomeric silsesquioxane) POSS monomer, comprises preparing graphene oxide by Hummers method, adding plasma water to graphene oxide, ultrasonically dispersing to form graphene oxide solution, adding carbon nano-tube to the aqueous solution, dispersing, centrifuging and collecting upper clear liquid, dissolving water-soluble nano-POSS monomer in plasma-free aqueous solution, performing ultrasonic treatment to obtain POSS aqueous solution, mixing obtained solutions and dispersing to obtain sizing agent. USE - The sizing agent is useful as a molecular coupling agent. ADVANTAGE - The method ensures relatively easy composite material molding, good comprehensive mechanical properties and low cost, thus solves the problems of composite material molding difficulty, poor mechanical properties and expensiveness resulting from the use of nano-material for improving composite material interface performances. The sizing agent ensures strong binding ability on fiber surface, where it is not necessary to remove the original commercial sizing agent during the usage of the sizing agent, and fiber sizing can be achieved by flooding method. DETAILED DESCRIPTION - Preparing fiber surface sizing agent based on carbon nano-tube-graphene oxide-(polyhedral oligomeric silsesquioxane) POSS monomer, comprises: (a) preparing graphene oxide by Hummers method, adding plasma water to graphene oxide, ultrasonically dispersing for 20-180 minutes to form graphene oxide solution of uniform brown color, centrifuging at high speed, and collecting the upper-layer clear liquid; (b) adding carbon nano-tube to the graphene oxide aqueous solution, magnetically stirring for 30-180 minutes, ultrasonically dispersing for 10-60 minutes, centrifuging and collecting the upper clear liquid; where the carbon nanotube is single-wall carbon nano-tube, multi-wall carbon nano-tube or functionalized carbon nanotube; the weight ratio of graphene oxide and carbon nano-tube is 1:1-10:1, the concentration of the carbon nano-tube is 0.01-0.3 wt.% and graphene oxide concentration is 0.01-3 wt.%; (c) dissolving the water-soluble nano-POSS monomer in plasma-free aqueous solution, and performing ultrasonic treatment to obtain uniformly distributed POSS aqueous solution, where the concentration of the POSS monomer is 0.01-1%, and the size of nano-POSS monomer is 1-30 nm; and (d) mixing the solution obtained in the step (b) with the solution obtained in the step (c), and ultrasonically dispersing to obtain the sizing agent solution of carbon nano-tube-graphene oxide-POSS monomer, where the sizing agent solid content is 0.1-1 wt.%, and the weight ratio of carbon nano-tube, graphene oxide and P0SS monomer is 0.1:1:1-1:1:1.