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当前位置:首页 > 商业/管理/HR > 企业文化 > 高孔隙率聚偏氟乙烯中空纤维超滤膜的研究许振良
:1007-8924(2000)04-0010-04高孔隙率聚偏氟乙烯中空纤维超滤膜的研究许振良1 翟晓东1 陈桂娥2(1., 200237;2., 200233) :以聚偏氟乙烯(PVDF)为膜材料,测定了不同温度下PVDF/DMAc和PVDF/NMP溶液的非溶剂混合参数,得到非溶剂混合参数的顺序为丙醇乙醇甲醇水.此外,讨论了不同溶剂、添加剂及芯液组成对膜孔隙率、通量和截留率的影响,其中PDVF中空纤维超滤膜的孔隙率可达到80%,水通量为58~110L/(m2·h),截留67000分子量物质时截留率为95%左右.通过测定纯水的通量、不同分子量蛋白质溶液的通量和截留率,确定了较好的制膜条件,从而可提出纺制高孔隙率PVDF中空纤维超滤膜的方法.:中空纤维膜;超滤;聚偏氟乙烯;湿法纺丝;分离性能:TQ028.8 :A (PVDF),.PVDF,1.75~1.78,39℃,170℃,316℃,,、、[1~3].,PVDF、、,、、,N-(NMP)、(DMAc).[3]、、、PEG6006,100~170L/(m2·h)PVDF,:∶(85%,DMAc15%)∶PEG60018∶82∶10.[4]PVDF、DMAcLiCl,PVDF.[5]PVDF(PMMA),DMAcNMP,PEG400,L-SPVDF.PVDF,,,(PVP)、(PEG),,,DMAcNMP、(DMF),[1~8].PVDF,PVDF/DMAcPVDF/NMP,.PVDF,、PVPPEG600,PVDF.1 实验部分1.1 PVDFPVDF2%DMAcNMP,20、30、40、50、6070℃,、、,,,,[9]:MP=/(+)(1):2000-01-23::(1963~),,,,.20 4 Vo1.20 No.420008MEMBRANESCIENCEANDTECHNOLOGYAug.2000DOI:10.16159/j.cnki.issn1007-8924.2000.04.0031.2 PVDF,20∶5PVDF/PEI/,,.,,,(),,,,,.,,,.PVDF[10],1.表1 中空纤维膜铸膜液和芯液的成份1PVDFDMAcPVP2PVDFNMPPVPNMP3PVDFDMAcPVP4PVDFDMAcPVPDMAc5PEIDMAcPEG6006PEINMPPVPNMP1.3 .,,,,.1.3.1 [11],0.5h,0.1MPa,,JW(L/m2·h).1.3.2 PEG0.05%~0.1%PEG,0.1MPa,.,R.1.3.3 :,100,5,.,SJ-12001,ρ,PVDF1.765g/cm3,(ε):ε=(1-ρ/ρ)×100%(2)2 实验结果与讨论2.1 MPPVDF/DMAcPVDF/NMP,12.,:.,PVDF,,.,PVDF.,PVDF,PVDF.2,δsp:;,δh[12].,,.,,.1 PVDF/DMAcMP2 PVDF/NMPMP 4:·11 · 表2 PVDF、溶剂和非溶剂的溶解度参数[8,12]δd/(MPa)1/2δp/(MPa)1/2δh/(MPa)1/2δsp/(MPa)1/2DMAc16.811.510.222.7NMP18.012.37.222.915.516.042.447.915.112.322.329.715.88.819.426.616.06.817.424.6PVDF17.212.59.223.22.2 PVDF2.2.1 PVDF143,3,PVDFPEI56.[4]PVDF13%~18%,PVDF53.4%~62.2%,PVDF20%,80%.,,,,,.表3 各种中空纤维膜孔径与孔隙率/mm/mm/mm/(g·cm-3)/%10.7741.1120.1690.28783.320.5010.8800.1900.36579.330.5670.9340.1800.34378.940.4220.8530.2150.36178.950.4840.7580.1370.37568.160.6850.8590.0850.37073.62.2.2 、4.,,.PVDF,PVDF;PVDF,PVDF;,,,,.14,NMP2DMAc4.5,24.NMP,NMPDMAc,.表4 各种中空纤维膜的通量* L/(m2·h)158.437.037.62110.672.169.1372.252.443.6489.157.253.5586.753.552.0697.767.265.2 *Mw=45000;Mw=67000.表5 各种中空纤维膜的截留率*% PEG10000PEC20000158.786.389.694.5232.157.078.186.494.7377.794.386.594.396.4470.982.790.390.895.6562.288.693.4680.989.695.5 *PEG10000Mw=10000;PEG20000Mw=20000;Mw=14400;Mw=45000;Mw=67000.2.2.3 ,.,,,,.,.,,,,.,PVPPEG,,PVDF;,,,,,.PEI,PVPPEG600[11],:PVP,,, ·12 · 20 ;PEG,.,PVP.2.2.4 ,1、34.,PVDF1~4:DMAc,.2.2.5 ,PEG10000、PEG20000、、,5,95%,,67000PVDF.3 结论1)PVDF/DMAcPVDF/NMP,:.,PVDF.,PVDF,PVDF.δsp:;,.2)PVDF、,NMPDMAc,PVP,,80%,58~110L/(m2·h),67000,95%,、. [1].[M].:,1994.33~48.[2]RautenbachR.—[M].:,1998.23~26.[3],,.[J].,1981,1(2):15~23.[4],,.[J].,1995,15(1):46~50.[5],.PVDF[J].,1999,25(2):83~86.[6], ,.PVDF/PS[J].,1997,23(2):131~134.[7],.(PVDF)[J].,1997,23(1):19~22.[8]BottinoA,CapannelliG,MunalliS,etal.Solubilitypa-rametersofpoly(vinylidenefluoride)[J].JPolymSci,PartB:PolymPhysics,1988,26:785~794.[9],,.[J].,1998,24(5):518~522.[10],,.PEI/PES[J].,1999,25(2):208~211.[11]XuZhenliang,ChungTaishung,Kai-CheeLoh,etal.PolymericasymmetricmembranesmadefromPEL/PBI/PEGforoil-surfactant-waterseparation[J].JMembrSci,1999,158:41~53.[12]BrandrupJ,ImmergutEH.PolymerHandbook[M].3ed,USA:JohnWiley&SonsInc,1989.519~575.(18)《》《》《》()1568,20006.《》32.,,2,40、、、200,,、,1568,200.《》 4:·13 · [9] .、[D].:,1999.PreparationandcharacterizationoftheSiO2membranessupportedonkieselguhr-mulliteceramictubesLIQing,ZHONGShunhe(CollegeofChemicalEngineeringandTechnology,TianjinUniversity,Tianjin300072,China)Abstract:Kieselguhr-mullite(K-M)ceramictube-supportedSiO2membraneshavebeenpreparedbyacom-binedliquidcrystaltemplatetechniqueandsol-gelmethod.ItwasshownthatSiO2membraneandTiO2transi-tionalmembranearetightlyandstablelinkedtogetherbyaSi—O—Tibond,withthemaximumintheporesizedistributionoftheSiO2membranebeingaround4~5nm.TheSiO2membranescanseparategasestosomeex-tentandtheirpermeabilityisfairlygood.TheeffectofthetemplatesonporesizedistributionandporecharacteroftheSiO2membraneshavebeendiscussed.Keywords:liquidcrystaltemplatetechnique;sol-gelmethod;supportedSiO2membrane;compositemem-brane(13)Studyonhigh-porositypoly(vinylidenefluoride)hollowfiberultrafiltrationmembraneXUZhenliang1,ZHANXiaodong1,CHENGuie2(1.ChemicalEngineeringResearchCentre,EastChinaUniversityofScience&Technology,Shanghai200237,China;2.DepartmentofChemicalEngineering,ShanghaiInstituteofChemicalTechnology,Shanghai200233,China)Abstract:Usingpoly(vinylidenefluoride)(PVDF)asthemembranematerial,themixabilityparametersofnon-solventsinPVDF/DMAcandPVDF/NMPsolutionsweredeterminedatdifferenttemperatures.Theywerefoundvaryinginfollowingorder:1-propanolethanolmethanolwater.Inaddition,theeffectsofdif-ferentsolvents,additivesandborefluidcompositionsonthepermeationflux,rejectionandporosityaredis-cussed.TheporosityofPVDFhollowfiberultrafiltration(UF)membranereached80%.WaterpermeationfluxesofPVDFhollowfiberultrafiltrationmembraneswere58~110L/(m2·h)andtherejectionratewithcut-offmolecularweightof67000wasabout95%.Basedonthemeasurementsofthepermeationfluxesofwaterandtherejectionratesofvariousproteinsolutions,theoptimumwetspinningconditionsofPVDFhollowfiberultrafiltration(UF)membraneswereobtainedandthemethodforthefabrica
本文标题:高孔隙率聚偏氟乙烯中空纤维超滤膜的研究许振良
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