【摘要】 对以各向同性的高表面孔隙率微孔膜为底膜 ,涂层起主要分离作用的复合膜进行了探讨 .提出了此类复合膜的渗透阻力模型 ,利用此模型讨论了不同涂层厚度、嵌入率、支撑层表面孔隙率对复合膜氧氮渗透分离性能的影响 .以此为基础 ,在复合膜涂层前 ,预先使支撑底膜的孔隙内浸涂一种特定的液体后再进行硅橡胶涂层 ,探讨了预涂液体及涂层液溶剂对复合膜涂层结构、嵌入率的影响 ,以及对硅橡胶复合膜氧氮渗透分离性能的影响 ,为在各向同性的高表面孔隙率微孔膜上进行涂层提供了一种工艺思路 .更多还原

【Abstract】 A resistance model for the transport of gases through composite membranes is proposed . The support membrane used in this paper is a k ind of isotropic m icroporous membrane with high surface porosity. The properties of the composite membrane are mainly determined by the coating layer. The relation between three main factors L₁（effective thickness of the coating layer）?f （penetrat ion degree of the coating material in the microporous substructure）?ε（surf ace porosity o f the substructure layer） and Ο₂/N₂ gas separation properties were stud ied on the basis of the model. To obtain composite membranes with a high permeat ion rate, we introduced a pre-coating liquid to the microporous support membrane s and investigated the influence of the pre-coating liquid and coating solvents on the structure and gas permeation rate of the resulting composite membranes.更多还原