Abstract

Composite mixed-matrix membranes for gas separation containing copolyetherimide Siltem^® as the polymer matrix and metal-organic framework MIL-101 (10 wt %) as the active filler, were obtained using dry and wet-dry formation techniques. It has been found that the polymer concentration in the initial solution does not significantly affect the CO₂ and CH₄ permeability of the film membranes obtained by dry molding. The addition of MIL-101 increases the CO₂/CH₄ selectivity of the dry-formed membranes approximately by 2 times compared to the selectivity of the filler-free polymer membranes. The materials synthesized by the wet-dry formation possess increased permeability and inverted CO₂/CH₄ selectivity, which indicates a change in the gas transport mechanism. With the increase of polymer concentration, the selectivity of the membranes obtained by the wet-dry technique, increases significantly due to the formation of the dense selective layer.

中文翻译：

---

聚合物浓度和形成工艺对含MIL-101填料的共聚醚酰亚胺基复合膜的气体输运和吸附性能的影响

摘要

对于含有共聚醚酰亚胺SILTEM气体分离复合混合基质膜^®作为聚合物基体和金属-有机骨架MIL-101（10重量％）作为活性填料，使用干和湿-干形成技术获得。已经发现，初始溶液中的聚合物浓度不会显着影响通过干法成型获得的膜的CO ₂和CH ₄渗透性。与无填料的聚合物膜的选择性相比，MIL-101的添加使干式膜的CO ₂ / CH ₄选择性提高约2倍。通过干湿合成法合成的材料具有更高的渗透性和反向CO ₂/ CH ₄选择性，它指示气体传输机理的变化。随着聚合物浓度的增加，由于形成了致密的选择性层，通过干湿技术获得的膜的选​​择性显着增加。