go-ca混合基质反渗透膜的制备与性能研究

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1、浙江大学硕士学位论文AbstractCelluloseacetate(CA)reverseosmosismembraneiswidelyusedinmunicipalwatertreatment,industrialwatertreatmentanddesalinationinMiddleEastthatneedscontinuousprocessofchlorine，duetolowcost，non—toxic，resistancetochlorineandpollution．CAmembranehasthedisadvantages

2、ofpoormechanicalpropertyandeasilytobecompactedanderodedbymicroorganism，whichblockitsapplicationinsomeareas．Grapheneoxide(GO)isconsideredthemostapplicationprospectofnanoparticalmaterialsaftercarbonnanotube．Itisnowknownasthehigheststrengthandhardnessofcrystalmaterialsandit

3、alsohasstrongantibacterialproperty．ThispapermainlyfocusesonthepreparationofGO／CAmixed-matrixmembrane，theimpactofaddingGOonthemechanicalproperties，pressureresistance，antibacterialproperty．Firstly,tetrahydrofuran(THF)WaSscreenedtOuse硒thesolventofcastingsolutioninsteadoface

4、tonebasedonthesolubilityparameter．ItWasfoundthatGOCanbewelldispersedinthecastingsolution．ThecastingsolutionWashomogeneousandstable．Themixed-matrixmembraneWaspreparedbythemethodofimmersion-precipitationphaseinversion．Therejectionandfluxofmixed—matrixmembranecontaining0．05

5、wt％GOfor2000ppmNaClaqueoussolutionwas92．7％and10．02L／m2·hatthepressureof3．0MPa．TheeffectofGOcontentonthestructure，hydrophilicityandcrystalformofmembraneWasstudied．Thesurfacemophplogyofmixed-matrixmembranes(MMMs)showedthataddinglessthan2WWoGOwouldnotchangethedensestructure

6、ofmembranesurface．andthecross-sectionmophplogyshowedthatwi也theincreaseofGOcontent，morecavitieswouldbeproducedinthemixedmatrixmembranes．MembranecontactangleanalysisshowedthattheaddingofGOcanincreasehydrophilicityofthemembranesurface，indicatingbetterperformanceofanti—fouli

7、ng．XRDshowedtheadditionofGOwouldnotchangethecrystaltypeofmembrane．Thepreparationconditionwasoptimizatied．TheoptimumconditionsofCAVII浙江大学硕士学位论文Abstractmembraneformationwereasfollowing：thecontentofadditiveformamideat25％；At240C，70％humidityconditions，volatilizationtimefor30s

8、econds；icewaterascoagulationbath；condensingtimemorethan2h；heattreatmenttemperatureabout820C．Theeffectof