Development of defect-free asymmetric polysulfone membranes for gas separation using response surface methodology
Development of defect-free asymmetric polysulfone membranes for gas separation using response surface methodology
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DOI：
10.1016/j.seppur.2004.02.011
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发表时间：
2004-12-01
影响因子：
8.6
通讯作者：
Lai, PY
中科院分区：
文献类型：
--
作者：
Ismail, AF;Lai, PY
本文报道了无缺陷的非对称膜的制备，通过操纵膜制造变量，包括聚合物浓度，溶剂比（挥发性较低的溶剂比，更挥发性的溶剂），强制对流蒸发时间和流延剪切速率。采用析因设计和响应面法研究了各变量对膜结构和性能的主效应和交互效应，以优化膜的成膜工艺。根据该研究的结果，为不对称聚砜膜制备了具有在6590-11330埃范围内的表皮厚度的基本上无缺陷的表皮层。这些膜的选择性是相对较高的相比，传统的膜，其中一些甚至超过了固有的选择性。因此，可以开发最佳的工艺条件来制备用于气体分离的无缺陷的非对称膜。(C)2004 Elsevier B. V.保留所有权利。
This paper reports the preparation of defect-free asymmetric membranes through the manipulation of membrane fabrication variables, including polymer concentration, solvent ratio (ratio of less volatile solvent to more volatile solvent), forced-convective evaporation time and casting shear rate. Main effects and interaction effects of these variables on membrane structure and performance were investigated by using factorial design and response surface methodology in order to optimize membrane formation process. According to the results of this study, an essentially defect-free skin layer with skin thickness in the range of 6590-11330 Angstrom was prepared for asymmetric polysulfone membranes. Selectivity of these membranes was relatively higher as compared to conventional membranes; some of them even surpassed the intrinsic selectivity. Therefore, optimal processing conditions can be developed to prepare defect-free asymmetric membranes for gas separation. (C) 2004 Elsevier B.V. All rights reserved.