Influence of quench medium on the structures and gas permeation properties of polysulfone membranes made by wet and dry/wet phase inversion
Influence of quench medium on the structures and gas permeation properties of polysulfone membranes made by wet and dry/wet phase inversion
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骤冷介质对湿法和干/湿相转化聚砜膜结构和透气性能的影响
DOI：
10.1016/0376-7388(92)85008-7
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发表时间：
1992
影响因子：
9.5
通讯作者：
W. Koros
中科院分区：
文献类型：
--
作者：
I. Pinnau;W. Koros
采用强迫对流蒸发干湿相转化法制备了基本无缺陷的不对称聚砜整体膜。急冷介质的选择对于形成具有高选择性和高气体通量的气体分离膜至关重要。用气体渗透测试和场发射扫描电子显微镜对不对称整体膜进行了表征。这项研究表明，湿相转化过程中的相分离和玻璃化过程应该尽可能快地产生最高性能的气体分离膜。
Essentially defect-free integrally-skinned asymmetric polysulfone membranes were fabricated by a dry/wet phase inversion process using forced-convective evaporation. The choice of the quench medium is of utmost importance for the formation of gas separation membranes having high selectivities combined with high gas fluxes. The integrally-skinned asymmetric membranes were characterized by gas permeation measurements and field emission scanning electron microscopy. This study indicates that the phase separation and vitrification processes occurring during the wet phase inversion step should be as rapid as possible to generate the highest performance gas separation membranes.