Fabrication of a Mixed Matrix Membrane with in Situ Synthesized Quaternized Polyethylenimine Nanopar

Fabrication of a Mixed Matrix Membrane with in Situ Synthesized Quaternized Polyethylenimine Nanoparticles for Dye Purification and ReuseFabricationofaMixedMatrixMembranewithinSituSynthesizedQuaternizedPolyethylenimineNanoparticlesforDyePurificationandReuseJunyongZhu,†YataoZhang,*,†,‡MiaomiaoTian,†andJindunLiu*,††SchoolofChemicalEngineeringandEnergy,ZhengzhouUniversity,Zhengzhou450001,People’sRepublicofChina‡UNESCOCentreforMembraneScienceandTechnology,UniversityofNewSouthWales,Sydney,NewSouthWales2052,AustraliaABSTRACT:Afacileandnovelmethodforthefabricationofmixedmatrixmembranes(MMMs)hasbeendeveloped,i.e.,insitusynthesisofquaternizedpolyethylenimine(QPEI)softnanoparticles(SNPs)followedbyquaternizationwithbromoethaneinpoly(ethersulfone)(PES)castingsolution.Theresultingcompositemembraneswereconstructedviaphaseinversionmethod.TheinfluencesofSNPsonthemorphologyandperformanceofthehybridmembranesweresystematicallyinvestigatedbyscanningelectronmicroscopy,dynamicwatercontactangle,antifoulingme