▎ 摘　　要

NOVELTY - Preparing peptide modified graphene oxide modified composite antibacterial positive osmosis membrane comprises (i) mixing aqueous solution containing solvent and silane coupling agent and then performing back-light hydrolysis, and then adding graphene oxide to react to obtain alkynylated graphene oxide, (ii) modifying peptides on the surface of alkynylated graphene oxide by clicking chemistry technology to obtain polypeptide-modified graphene oxide, and (iii) uniformly mixing peptide-modified graphene oxide, high molecular polymer and solvent, and then using liquid phase conversion method to coat the film to obtain peptide-modified graphene oxide-modified composite antibacterial positive osmosis membrane. USE - The membrane is useful in the fields of seawater desalination, drinking water treatment or wastewater treatment (claimed). ADVANTAGE - The membrane: improves the antibacterial performance of graphene through polypeptide modification of graphene oxide; has long-lasting antibacterial ability, no regeneration, high penetration efficiency, stable operation and wide application prospect; and is environmentally friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for polypeptide modified graphene oxide modified composite antibacterial positive osmosis membrane prepared by the above mentioned method, preferably, the thickness of the polypeptide-modified graphene oxide-modified composite antibacterial positive osmosis membrane is 0.2-2 nm, preferably, when the peptide-modified graphene oxide-modified composite antibacterial positive osmosis membrane uses 2 mol/l sodium chloride solution as the absorbing solution, the pure water flux is 16.7-32.6 L-m-2/hour, the bactericidal rate of Escherichia coli and Staphylococcus aureus is 80-90%.