▎ 摘　　要

NOVELTY - Graphene oxide/poyurethane composite comprises graphene oxide and polyurethane that are chemically combined. USE - Graphene oxide/poyurethane composite used for medical tube. ADVANTAGE - The graphene oxide/poyurethane composite has high rigidity and density, and improved mechanical property. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a method for manufacturing complex body, which involves reacting graphene oxide with the diisocyanate, reacting the isocyanate end graphene oxide and polyol and extending the reaction by using the chain extender; and (2) a tube for medical treatment, comprises external layer formed on the inner layer of the hollow tube that is made of graphene oxide/polyurethane composite.