功能化纳米tio2改性pvdf图案膜及其性能研究

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1、万方数据AbstractMembraneseparationisaneconomic．e珩cientandenvironmental．friendlytechnologywhichcanbeusedforseparation，concentrationandpurification．Polyvinylidenefluoride伊VDF)isoneofthewidelyusedmembranematerials．However,thestronghydrophobicityofPVDFleadstothefoulingofmembra

2、nes．resultingindecreasingfluxinthewaterfil仃ationprocess．ItiSofgreatimportancetoincreasethehydrophilicityofPVDFmembranes．Inordertosolvethemembrane’son—linepollutionproblem．thisstudyselectedA妒@TNT(TIP2nanotuhesdopedwimsilverphosphate)andAg@n盯(TIP2nanotubesdopedwithsilver

3、nitrate)asmodifyingmaterial．andusedphaseinversionmethodtocastpatternedmembrane．ThebasicperformanceofthehybridmembranewascharacterizedbyScanningElectronMicroscopy,ultrafiltrationtest,contactangleandmechanicalstrengthtest．ThenBovineserumalbumin饵SA)andHumicacid(HA)werecho

4、senassimulatedcontaminants．Filtrationexperiment，resistanceanalysis，staticadsorptionanddesorptionexperimentwereusedtostudyitsresistanceofchemicalpollution．ItsantibacterialabilityofE．coliwastestedbyinhibitionzonemethod．Finally,physicalcleaningandlightcleaningwereusedtost

5、udythemembranecleaningmethod．TheexperimentalresultsshowedthatthestructureandbasicperformanceofthehvbridmembranewereimprovedwiththeadditionofTNT'AgP@TNl址1dAg@1NT．Thethicknessofskinlayerdecreasedwhileinterfacialmicroporesincreased-andthemicroporeshadgoodconnectionsbetwee

6、neachother．Amongthem，Ag囝n盯modificationeffectiSthebest．Purewaterfluxsignificantlyincreased．from282．6L／m2·hofMroseto480．4L／m2．h．Theretentionrateandporosityalsoincreased,theultrafiltrationperfc}rmanceimprovedalot．Thecontactanglehadadeclineof48．20．whichshowedthathydrophili

7、cofthehybridmembranewereimproved,andthestrengthandtoughnesswerealsoimproved．Intheantifoulingexperiment，theantifoulingperformanceandthefluxrecoveryabilityincreasedremarkably．ComparedwithPVDFmembrane．灯Mhvbridmembrane’SRFRforHAandBSAdecreased33．9％and30．2％．respectivelywhil

8、etheFRRincreased27．9％and22．5％．Thestaticadsorptionexperimentshowedthatthehybridmembranes’adsorptionamountdecreasedrema