Gas-permeation properties of asymmetric polycarbonate, polyestercarbonate, and fluorinated polyimide membranes prepared by the generalized dry-wet phase inversion process
Gas-permeation properties of asymmetric polycarbonate, polyestercarbonate, and fluorinated polyimide membranes prepared by the generalized dry-wet phase inversion process
复制标题
DOI：
10.1002/app.1992.070460709
复制
发表时间：
1992-11
影响因子：
3
通讯作者：
I. Pinnau;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超薄不对称聚碳酸酯、聚酯碳酸酯和6FDA-IPDA聚酰亚胺薄膜。测定了这些膜对N_2、O_2、He、CO_2和CH_4的纯气体渗透性能。膜样品的平均表观皮肤层厚度在330到580A之间变化，这比以前通过传统的湿相转化工艺形成的无缺陷的膜要薄得多。这项研究表明，干/湿相转化工艺似乎普遍适用于由疏水的玻璃聚合物形成超薄的、无缺陷的不对称膜。©1992 John Wiley父子公司
Essentially defect-free, ultrathin asymmetric polycarbonate, polyestercarbonate, and 6FDA–IPDA polyimide membranes were prepared by a dry/wet phase inversion process using forced-convective evaporation. The pure gas permeation properties of these membranes were determined for N2, O2, He, CO2, and CH4. The average apparent skin-layer thicknesses of the membrane samples varied between 330 and 580 A, which is substantially thinner than for previous defect-free membranes formed by the conventional wet phase inversion process. This study indicates that the dry/wet phase inversion process appears to be universally applicable to form ultrathin, defect-free asymmetric membranes from hydrophobic, glassy polymers. © 1992 John Wiley & Sons, Inc.