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1、河北工業(yè)大學碩士學位論文ABSTRACTSolventresistantnanofiltrationmembraneextendedtheapplicationofmembranetechnologyfromaqueoussolutiontoorganicsolventsystem.Thecomprehensivepropertiesofthecompositenanofiltrationmembranesbyinterfacialpolymerizationwerebetter.Here,weproducedthepolyimiden
2、anofiltrationmembranesonthesupportofpolypropylenewithinterfacialpolymerization.Firstly,1,2,4,5-benzenetetraacylchloride(BTAC)wassynthesizedandpurified.Thehydrophobicpolypropylene(PP)membranesweremodifiedbytheacrylamidemodificationtechniquetoimproveitshydrophipicity.Theef
3、fectsofconditionsonthehydrophipicitywereinvestigated,includingnitricacid(catalyst)concentration,graftingtimeandhydrolysistime.Theopticalconditionsforthehydrophipicitywereidentified;thegrafting2degreewas1147μg/cmandthewatercontactangledecreasesfrom127°to47°.However,theres
4、ultsshowedthatotherperformancesofthemembranechangedslightly,includingthepurewaterflux、tensilestrengthandelongationatbreak.ThePI/PPcompositemembraneswereformedbyinterfacialpolymerizationoftheBTACinoganicphaseand1,3-diamine(MPDA)inaqueousphase.Themorphologyandsurfacechemic
5、alpropertyoftheresultantcompositemembranewereinvestigatedbySEMandFTIR,respectively.Thecompositemembraneswereevaluatedwiththepermeatefluxandrejectionof1g/LNa2SO4solutions.Theeffectsofconditionsonstructureandperformanceofthemembraneswereinvestigated,includingMPDAconcentrat
6、ion、BTACconcentration、imidizationsolventsandTBACasphasetransfercatalysis.WiththeincreaseofMPDAconcentration,thepermeatefluxfirstdecreasdandthentendedtobeconstant,whiletherejectionfirstincreasedandthentendedtobeconstant.WiththeincreaseofBTACconcentration,thepermeatefluxfi
7、rstdecreasedandthenincreasedslightly,whiletherejectionfirstincreasedandthendecreasedslightly.layerturnedloose.Therefore,theseparationperformanceofthemembraneswasaffected.Using2-methylpyridineascatalystinimidizationreagent,themembranesurfacewashomogeneousanddense,resultin
8、ginthegoodperformance.TheadditionofTBACintheaqueousphasefacilitatedthetransferofMPDAfromaqueousphasetoo
