Research on Graphene-Oxide Interfacial Modulated Nanofiltration Membranes:Preparation and Performance
To upgrade the permeability and anti-fouling performance of conventional polyamide nano-filtration membranes,a laboratory experiment was concucted to fabricate the graphene oxide composite nano-filtration membrane(GO-PA-PSF)using the inter-facial polymerization method,which involved polysulfone(PSF)ultra-filtration membranes used as the substrate,piperazine and homotrimethylene tricarbonyl chloride as the aqueous-phase and organic-phase monomers,and graphene oxide(GO)as the hydrophilic modified material;and then the effect of the propertion of GO on membrane surface morphology,chemical structure and separation performance was investigated.Consequently,it was showed that as GO mass fraction came to 0.01％,the surface of GO-PA-PSF membrane began to wrinkle,increasing membrane surface roughness,hydrophilicity and negative electro-negativity,the permeation flux was 50.47 L/(m2·h),Na2SO4 retention rate 98.14％;in addition,the GO-PA-PSF desalination test maintained stable quite well in the 30 h,demonstrating a better anti-fouling performance in the treatment of three specific pollutants.
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