欢迎来到天天文库
浏览记录
ID:52389419
大小:1.08 MB
页数:5页
时间:2020-03-27
《聚砜中空纤维膜的制备及其结构与性能研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第42卷,第7期工程塑料应用、b1.42.No.7162014年7月ENGINEERINGPLASTICSAPPLICATIONJul2O14doi:lO.39690.issn.1001-3539.2014.07.004聚砜中空纤维膜的制备及其结构与性能研究肖登荣,张敏敏,姚勇,张凯舟,杨敬葵,秦舒浩(1.贵州大学材料与冶金学院,贵阳550025;2.国家复合改性聚合物材料工程技术研究中心,贵阳550014)摘要:以低分子量聚乙二醇(PEG)为添加剂,二甲基乙酰胺(DMAC)为溶剂,采用纺丝及浸没沉淀相转化法制备了聚砜
2、fPSU)中空纤维膜,考察了PEG含量和空气间隙对膜结构及性能的影响。实验结果表明,随着PEG含量的增加,PSU铸膜溶液的黏度增大,所得膜结构从指状孔向海绵孔转变,膜变得致密,膜的孔隙率和纯水通量降低,牛血清白蛋白(BSA)截留率和拉伸强度提高;但当PEG含量继续增加时,尽管孔隙率继续下降,但膜截面孔径增大,膜的纯水通量反而有所回升,相应的BSA截留率下降。当空气间隙较短时,膜的结构基本没有变化,但当空气间隙达到7cm时,膜截面出现指状孔,膜变得相对疏松;随空气间隙的增加,膜的纯水通量上升,BSA截留率总体下降..当P
3、EG与DMAc的质量比为35/45,空气间隙为5cm时,膜的综合性能最好,其纯水通量为129.0L/(m·h),BSA截留率为96.8%,孔隙率为75.5%,拉伸强度为5.01MPa。关键词:聚乙二醇;聚砜;黏度;膜结构中图分类号:TQ028.8文献标识码:A文章编号:1001.3539(2014)07.0016.05PreparationandResearchonStructureandPropertiesofPolysulfoneHollowFiberMembraneXiaoDengrong一,ZhangMinmi
4、n,YaoYong,ZhangKaizhou,YangJingkui,QinShuhao。f1.CollegeofMaterialsScienceandMetallurgyEngineering,GuizhouUniversity,Guiyang550025,China;2NationalEngineeringResearchCenterforCompoundingandModificationofPolymericMaterials,Guiyang550014,China)Abstract:Takingpolyeth
5、yleneglycol(PEG)withlowmolecularweightasadditiveanddimethylacetamide(DMAc)assolution,polysulfonehollowfibermembranewaspreparedviaspinningandimmersionprecipitationphaseinversionmethod.TheeffectsofPEGcontentandairgaponstructuresandperformancesofthemembranewereinve
6、stigated.TheresultsshowthatwiththePEGcontentincreasing,theviscosityofthepolysulfonecastingsolutionraises,thecross—sectionmorphologyofthemembranechangesfromthetypicalfingerholetospongeholestructureandthemembranesbecomedense,whichresultthattheporosityandpurewaterf
7、luxdecrease,meanwhile,theretentionrateofbovineserumalbumin(BSA)andtensilestrengthincrease.ButwiththePEGcontentcontinuedincreasing,althoughthetheporositycontinuestodecrease,themembraneholesbecomelarger,sothepurewaterfluxofthemembraneisreboundedandtheretentionrate
8、ofBSAdecreases.Else,whentheairgapisshort,thestructureofthemembranedoesn’tchange,butwhentheairgapis7cm,thefingerholesoccurandthemembranebecomeloose.Withtheairgapincrea
此文档下载收益归作者所有