一种聚丙烯中空纤维疏水膜及其制备和应用.docx

一种聚丙烯中空纤维疏水膜及其制备和应用
摘要
本文介绍了一种聚丙烯中空纤维疏水膜及其制备和应用。采用相转移聚合法和非溶剂相凝固技术制备聚丙烯中空纤维，并通过表面改性使其具有疏水性。结果表明，聚丙烯中空纤维疏水膜具有优良的水激光抗污染性能和高通量，适用于海水淡化和废水处理等领域。
关键词：聚丙烯中空纤维；疏水性；海水淡化；废水处理
Introduction
Cleanwaterisapreciousresource,andtheshortageoffreshwaterhasbecomeanincreasinglyseriousproblemworldwide.Seawaterdesalinationandwastewatertreatmentareimportantwaystosolvetheproblemofwaterscarcity.Thetraditionalseawaterdesalinationandwastewatertreatmenttechnologieshavesomedisadvantagessuchashighenergyconsumption,highcost,andlowefficiency.Therefore,itisurgenttodevelopnewtechnologiestosolvetheseproblems.
Membranetechnologyhasbecomeanimportanttechnologyforseawaterdesalinationandwastewatertreatmentduetoitsadvantagesoflowenergyconsumption,lowcost,andhighefficiency.However,thetraditionalmembranetechnologyhassomelimitationssuchaspooranti-foulingperformanceandlowwaterflux.Therefore,itisnecessarytodevelopanewtypeofmembranewithexcellentanti-foulingperformanceandhighwaterflux.
Thehollowfibermembraneisatypicalmembranewithhighsurfacearea,goodmechanicalproperties,andhighporosity.Polymermaterialssuchaspolyvinylidenefluoride(PVDF),polyethersulfone(PES),andpolysulfone(PS)havebeenusedtopreparehollowfibermembranes.However,thesemembraneshavepooranti-foulingperformanceandlowwaterflux.Therefore,itisnecessarytodevelopanewtypeofhollowfibermembrane.
Polypropylene(PP)isawidelyusedpolymermaterialduetoitsexcellentchemicalstability,mechanicalproperties,andlowcost.ThePPhollowfibermembranehasbeenwidelyusedinseawaterdesalinationandwastewatertreatment.However,thePPhollowfibermembranehaspoorhydrophilicityandispronetofouling,whichaffectstheefficiencyofseawaterdesalinationandwastewatertreatment.
Inthisstudy,wepreparedahydrophobicpolypropylenehollowfibermembranebyusingthesurfacemodificationtechniqueandevaluateditsperformanceinseawaterdesalinationandwastewatertreatment.
MaterialsandMethods
Materials
Polypropylene(PP)waspurchasedfromBeijingChemicalCompany.Polyoxyethylene(5)nonylphenylether(NP-5)waspurchasedfromSigma-Aldrich.Polyvin