1、北京化工大學碩士學位論文膜蒸餾用膜的制備及膜滲透性能評價研究姓名：楊蘭申請學位級別：碩士專業(yè)：化學工程指導教師：馬潤宇2001.5.26j!室些三查堂堡圭堂垡鯊皇塑墨————STUDYoNTHEPREPARATIoNANDTHEPERMEABILITYEVALUATIoNOFMEMBRANEFoRMEMBRANEDISTILLATIoNABSTRACTMembranedistillation(MD)isarelativelynewmem

2、braneseparationprocessEssentiallytheprocessemployshydrophobicporousmembranewhichispermeabletovaporbutnottotheliquidphasetealizewaterpurificationandsolutionconcentrationTheadvantagesofMDareenergyefficient、costefficientand

3、operationeasyAtpresent，thewidecommercialuseofMDhasnotyetbeenachievedmainlyduetothepreparationoffineandcheapMDmembraneInthispaperthepreparationofhydrophobicmicroporouspolyvinylidenefluorid(PVDF)membraneforMDhasbeenstudied

4、theoreticallyandexperimentallyTheeffectsoftheconcentrationsofPVDFandaddictiveinthecastingsolution，thesecondaddictiveanditscontent，thecompositionandtemperatureofthecoagulationbathonthemorphologyofthemembranewerediscussedi

5、ndetailThemorphologyofthemembranewasexaminedbyscanningelectronmicroscopeTheresultshowedthatthecastingsolutioncomposedofl5％PVDF75％N，Ndimethylacetamide，3％lithiumchlorideand7％polyethy’leneglycolcouldperformthemembranewithhi

6、【ghporosityandporesizeThroughanalyzingthefactorsthataffectsgelatinrateandmembranestructureofPVDFformedthroughphaseinversionusingaqueousalcoholsolutionasthegelatinmedium，the30。Cwaterwaschosentobethegelatinmediumbecauseofi