分离CO_(2)的纳米材料/Pebax混合基质膜研究进展

Research progress of nanomaterial/Pebax mixed matrix membrane for CO_(2) separation

聚醚嵌段聚酰胺(Pebax)是一种极具潜力的聚合物气体分离膜材料,是CO_(2)分离领域的研究热点.Pebax基CO_(2)气体分离膜具有高渗透性和低选择性,难以突破trade-off上限.采用纳米材料和Pebax共同作用制备的混合基质膜(MMMs)提供了突破trade-off上限的可能.3种纳米填料,即纳米金属氧化物、有机金属框架(MOFs)及纳米碳材料常被作为填料加入到聚合物基质中,可以利用纳米材料表面上的官能团或者形貌特征,在膜内构建气体传递的通道,实现对CO_(2)的吸附传递.本文综述了Pebax基纳米填料MMMs的最新研究进展及其在气体分离方面的应用,并提出了该领域面临的挑战和发展方向.

Polyether block polyamide(Pebax)as a highly potential polymer material in gas separation membrane,has been paid attention in the field of CO_(2)separation.The CO_(2)gas separation membrane based on Pebax has high permeability and low selectivity,and it is difficult to break the upper limit of trade-off.Mixed matrix membranes(MMMs)are prepared by inorganic materials and Pebax,which provides the possibility to break the upper limit of trade-off.Nano-metal oxides,organic metal frameworks(MOFs),and nano-carbon materials are often added into polymer materials as nano-fillers.Utilizing the functional groups or morphological features on the surface of the nanomaterials,agas transfer channel is constructed in the membrane to realize the adsorption and transfer of CO_(2).In this paper,the latest research progress of Pebax-based nano-filler MMMs and their applications in gas separation are reviewed.Finally,the challenges and development directions facing this field are proposed.