Preparation of porous PVDF hollow fibre membrane via a phase inversion method using lithium perchlorate (LiClO4) as an additive
Preparation of porous PVDF hollow fibre membrane via a phase inversion method using lithium perchlorate (LiClO4) as an additive
复制标题
DOI：
10.1016/j.memsci.2005.01.015
复制
发表时间：
2005-08
影响因子：
9.5
通讯作者：
M. Yeow;Yutie Liu;Kang Li
中科院分区：
文献类型：
--
作者：
M. Yeow;Yutie Liu;Kang Li
以N，N-二甲基乙酰胺（DMAc）为溶剂，高氯酸锂（LiClO 4）为无机盐添加剂，水为凝固介质，采用相转化法制备了聚偏氟乙烯（PVDF）中空纤维膜。利用浊点实验数据绘制了LiClO 4/PVDF/DMAc/水四元体系的相图。在LiClO 4的加入下，考察了凝固浴温度对膜结构的影响。采用气体渗透法测定了PVDF中空纤维膜的孔径和孔径分布。此外，使用不同比例的1-甲基-2-吡咯烷酮（NMP）/水的混合物的膜结构上的内部混凝剂的组成的影响进行了研究。
Polyvinylidene fluoride (PVDF) hollow fibre membranes were prepared via a phase inversion method, using N,N-dimethylacetamide (DMAc) as solvent, lithium perchlorate (LiClO4) as inorganic salt additive and water as the coagulation medium. The phase diagram of the LiClO4/PVDF/DMAc/water quaternary systems was constructed using cloud-point experimental data. With the addition of the LiClO4, the effect of coagulation bath temperature on the structure of membranes was investigated. The gas permeation method was used to estimate the pore size and pore size distribution of the PVDF hollow fibre membrane prepared. Also, the effect of the composition of internal coagulant on the membrane structure was investigated using different ratio of 1-methyl-2-pyrrolidone (NMP)/water mixtures.