聚甲基丙烯酸-N，N-二甲氨基乙酯-聚砜內(nèi)壓型荷正電中空纖維復合納濾膜的制備及性能.pdf

1、分類號：—T00—28膏數(shù)：——甲位代碼：』旦Q翌學號天津工業(yè)大學學位論文Y866353聚甲基丙烯酸一Ⅳ’臚二甲氨基乙酯／聚砜內(nèi)壓型荷正電中空纖維納濾復合膜的研究(申請碩士學位)專業(yè)：研究方向：研究生：指導教師：絲魁堂墊選送鮑劍蚤皇厘旦筮整姐墊旦亟數(shù)撞ABSTRACTInthispaperApositivelychargedcompositernanofiltmtion(NF)membranewasdevelopedbyinterfac

2、iaipolymedzation(quatemization)usingpolysulfone伊SF)ultrafiltrationmembraneassupportmembrane，poly[2(NNdimethylamino)ethylmethacrylate】(PDMAEMA)ascoatingmaterial，andPxylylenedichlorideascrosslinkingagentUsing29／LMgS04aSthe

3、feedliquid，underalloperatingpressureof08MPatheinside—flowhollowfiberNFmembranehasasaltrejectionabove884％，andapermeatingfluxof1775L／m2h；butaplateNFmembranehasasaltrejectionabove965％andapermeatingfluxof242L／m2hThestudycond

4、uctedresearchonthefollowingthreefields：firstly，thecharacteristicsoftheinterfacialpolymerizationsystemofPDMAEMAaqueoussolution／pxylylenedichlorideheptanesolutionweresystematicallyinvestigated，suchaStheagentsaddedintothein

5、terracialpolymerizationsysteminfluenceonthecharacteristicsoftheNFmembraneForinstance，NaHC03canadjustthepHofthePDMAEMAaqueoussolutionandmaintainthemacromoleculeconformationofPDMAEMAwhichcouldenhancethecross—linkingreactio

6、n111eplateNFmembranepreparedaccordingtothiswayhaSasaltrejectionof925％andapermeatingfluxof156L／mZhAdditionally，theturnoffratioofplateandhollowfiberNFmembranehasbeenincreasedThetimeofcrosslinkingreactionCanbeeffectivelyred

7、ucedfrom5hrto35hrbyaddingKIofO172mol／LThePDMAEMAaqueoussolution、viththeethanolof5％(v／v)CandevelophighperformanceNFmembranewithhi【ghersaltrejectionandhigherpermeatingfluxAccordingtotheoverallexperiment，whentheconcentratio

8、nofthePDMAEMAaqueoussolutionisO75％，thecharacteristicofhollowfiberNFmembraneCanbeachievedthebestSecondly，positivelychargedhollowfiberNFmembranehastheselectivitytowardstherejectionsofinorganicsalt，whichCanrcjecttheunivalen

9、tionbelow50％whileitCanrejectthebivalentionabove80％ComparedwiththecommercialNFmembrane，suchasNTR7450，Desal一5，thehollowfibermembranepreparedbyourselveshasthesameevenmorehigherrejectionstowardsMgS04andglucideofsmallmolecule