文献类型：期刊文献

中文题名：凝固浴组成和温度对PVDF疏水微孔膜结构与性能的影响

英文题名：Effect of Coagulation Bath Composition and Temperature on Morphology and Property of Microporous PVDF Hydrophobic Membrane

作者：李倩[1,2];许振良[1,2];吕洁[2]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237;[2]华东理工大学化学工程研究所膜科学与工程研发中心,上海200237

年份：2010

卷号：24

期号：2

起止页码：336

中文期刊名：高校化学工程学报

外文期刊名：Journal of Chemical Engineering of Chinese Universities

收录：CSTPCD;;EI(收录号：20102112958477);Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家"十一五"科技支撑计划重大项目(2006BAEO2A01)

语种：中文

中文关键词：聚偏氟乙烯(PVDF);凝固浴组成;凝固浴温度;疏水性

外文关键词：PVDF; coagulation bath composition; coagulation bath temperature; hydrophobicity

摘要：利用非溶剂相转化法(NIPS),以聚偏氟乙烯(PVDF)/磷酸三乙酯(TEP)-N,N-二甲基乙酰胺(DMAc)为铸膜液体系,乙醇水溶液为凝固浴制备高性能的PVDF疏水微孔膜。考察了凝固浴中乙醇(EtOH)含量及凝固浴温度对PVDF成膜分相速率、膜结构和膜疏水性的影响。实验结果表明,在20℃的凝固浴温度下,凝固浴中乙醇含量的升高减慢了铸膜液体系的分相速率,提高了PVDF膜的孔隙率;在凝固浴中添加60%(wt)的乙醇,可形成表面荷叶状结构和截面对称的海绵状结构,膜表面的接触角为130.3°,呈很强的疏水性,并具有较优的膜强度。
Microporous poly （vinylidene fluoride） （PVDF） hydrophobic membranes were prepared via a non-solvent induced phase separation （NIPS） method. Using PVDF/triethyl phosphate （TEP）-N,N-dimethylacetamide （DMAc） as casting solution and a mixture of water and ethanol （EtOH） as coagulation bath, the microporous PVDF hydrophobic membrane with good performance was prepared. The effects of coagulation bath composition and temperature on the demixing rate, membrane morphology and hydrophobicity of the prepared membranes were investigated. The experimental results show that, at 20℃, increasing the EtOH content in the coagulation bath will slow the precipitation process and increase the porosity of the prepared PVDF membrane. The addition of 60%（wt） EtOH to the coagulation bath results in a lotus leaf type arrangement of PVDF solid protrusions spreading on the membrane top surface and the sponge structure fulling the whole cross section of the membrane. The prepared membrane shows an excellent mechanical property and its contact angle can reach 130.3°, which indicates that the prepared membrane has a high hydrophobicity.