膜科学与技术

NanoAg/IL/Pebax混合基质膜的制备及其CO2分离性能

作者：常小虎，李鹏，杲静，贺高红

单位： 1. 中国石油化工股份有限公司西北油田分公司石油工程技术研究院，新疆乌鲁木齐，830011；2.中国石油化工股份有限公司碳酸盐岩缝洞型油藏提高采收率重点实验室，新疆乌鲁木齐，830011；3.大连理工大学化工学院，辽宁大连 116023

关键词：混合基质膜，离子液体，气体分离，二氧化碳

出版年,卷(期):页码： 2023,43(3):15-21

摘要：

针对混合基质膜中聚合物基质同填料之间的界面相容性问题，利用离子液体（IL）亲疏水特性，选用3种不同亲疏水性的离子液体[Bmim][Tf2N]，[Bmim][BF4]和[Bmim][PF6]作为Pebax基质和纳米银颗粒（NanoAg）的界面亲和剂制备混合基质膜，探究三者之间的协同作用机制以及对膜气体分离性能的影响。利用扫描电子显微镜对混合基质膜形貌进行分析，探究其分散程度；利用机械拉力机探究IL对混合基质膜机械性能和气体分离性能的影响。结果表明，[Bmim][BF4]的加入使混合基质膜CO2/CH4的选择性达到35.84，相对于纯Pebax膜提高了58.67%。

In order to solve the problem of interfacial compatibility between the polymer matrix and the filler in the mixed matrix membrane, three kinds of ionic liquids with different hydrophilic and hydrophobic properties ([Bmim][Tf2N], [Bmim][BF4] and [Bmim][PF6]) were used as interfacial affinity agents for Pebax matrix and nano-silver particles (NanoAg) to prepare mixed matrix membranes to explore the synergistic mechanism between their effects on the gas separation performance of the membrane. The morphology and degree of dispersion of the mixed matrix membrane was analyzed by scanning electron microscopy; the effect of IL on the mechanical properties and gas separation performance of the mixed matrix membrane was investigated by mechanical tension machine. The results showed that the addition of the [Bmim][BF4] increased the CO2/CH4 selectivity of the mixed matrix membrane to 35.84, which was 58.67% higher than that of the pure Pebax membrane.

常小虎（1986-），陕西榆林人，男，本科，副研究员，研究方向油气集输处理与CO2捕集及清洁能源利用

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