▎ 摘　　要

NOVELTY - Graphene-polyamide composite comprises graphene and an interfacially-polymerized polyamide. The composite is in the form of a self-supporting membrane having a graphene side opposite to a polyamide side, or the composite is in the form of a microparticle, comprises a graphene core and a polyamide shell. USE - Graphene-polyamide composite used in form of membrane or microparticles, i.e. used for water treatment (all claimed), such as desalination. ADVANTAGE - The composite plays an important role in water permeability, solute rejection, and mechanical strength. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: A method for preparing the graphene-polyamide composite in the form of a membrane or microparticles, which involves: forming a biphasic polymerizable mixture, comprises an aqueous solvent, an organic solvent immiscible with the aqueous solvent, graphene, a polymerizable monomer composition; and to form the membrane, providing a single interface between the aqueous phase and the organic phase in the biphasic polymerizable mixture, and allowing the polymerizable monomers to polymerize under conditions effective to form the membrane at the interface; or to form the microparticles, providing multiple interfaces between the aqueous phase and the organic phase in the biphasic polymerizable mixture; and allowing the polymerizable monomers to polymerize under conditions effective to provide the graphene-polyamide composite microparticles. A method for water treatment, which involves: providing the graphene-polyamide composite membrane for filtration by flow-through mode, connecting the graphene-polyamide composite membrane to a current source, supplying an effective amount of current to the membrane, and passing water containing a source chemical for electrochemical oxidation and a solute for treatment over the membrane to obtain a filtrate separated from at least a portion of the solute for treatment. A method for desalinating water, which involves: immersing the graphene-polyamide composite microparticles in an aqueous saline solution, allowing the microparticles to selectively absorb water into their core and exclude one or more solutes, isolating the microparticles from the saline solution, and applying a pressure on the microparticles to release desalinated water.