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聚芳硫醚砜(PASS)分离膜的磺化改性研究.docx

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聚芳硫醚砜(PASS)分离膜的磺化改性研究 Title:SulfonationModificationofPolyarylsulfone(PAS)MembranesforPervaporationSeparationofOrganicSulfurCompounds Abstract: Pervaporationisapromisingmembraneseparationtechniquefortheremovaloforganicsulfurcompoundsfromliquidstreams.Polyarylsulfone(PAS)membraneshaveshownexcellentperformanceinthisfield,buttheirseparationefficiencycanbefurtherimprovedbymodifyingtheirsurfacepropertiesviasulfonation.ThisstudyaimstoinvestigatethesulfonationmodificationofPASmembranesforenhancedseparationoforganicsulfurcompounds.Theeffectsofsulfonationconditions,suchassulfonationagentconcentration,reactiontime,andtemperature,onthemembraneperformanceweresystematicallystudied.ThemodifiedPASmembraneswerecharacterizedbyvariousanalyticaltechniquestodeterminechangesintheirsurfacechemistryandmorphologicalproperties.TheresultsdemonstratedthatsulfonationmodificationimprovedthehydrophilicityandselectivityofthePASmembranes,leadingtoenhancedseparationefficiencyfororganicsulfurcompounds.Overall,thisresearchcontributestothedevelopmentofadvancedmembranematerialsforpervaporationseparationapplications. 1.Introduction Membraneseparationtechniqueshavegainedsignificantattentioninrecentyearsduetotheiradvantagesoflowenergyconsumption,easeofoperation,andenvironmentalfriendlinesscomparedtoconventionalseparationprocesses.Pervaporationisamembrane-basedseparationtechniqueparticularlysuitablefortheremovaloforganicsulfurcompoundsfromliquidstreams.Organicsulfurcompounds,suchasmercaptansandthiols,arewidelyusedinthepetrochemicalandpharmaceuticalindustriesbutneedtoberemovedduetotheirfoulodorsandtoxicity.Polyarylsulfone(PAS)membraneshavebeenextensivelystudiedforpervaporationapplicationsduetotheirgoodchemicalandthermalstability.However,enhancingtheseparationefficiencyofPASmembranesisstillacriticalchallenge. 2.SulfonationofPASMembranes 2.1SulfonationAgent TheselectionofthesulfonationagentplaysacrucialroleinthemodificationofPASmembranes.Commonlyusedsulfonationagentsincludechlorosulfonicacid(CSA)andsulfuricaci