摘要
混合基质膜(MMMs)在气体分离领域具有良好的应用前景,金属有机框架(MOFs)由于具有高孔隙率和有机连接基团,常被用作填料制备MMMs。但由于MOFs与聚合物的界面相容性问题,MMMs的气体分离性能提升受到限制。本文合成了功能化的Zr-MOF(UiO-66-AC),并利用其与聚醚共聚酰胺(Pebax)共同制备了混合基质膜。填料中引入的羰基和羧基等基团提供了MOFs与聚合物基质之间较强的界面相互作用。与纯Pebax膜相比,UiO-66-AC/Pebax MMMs的气体渗透性能得到了显著提高。当填料质量分数为6%时,膜的CO_(2)渗透系数为102.4 Barrer,CO_(2)/N_(2)和CO_(2)/CH_(4)选择性分别为90.6和26.0,CO_(2)/N_(2)分离性能突破了Robeson上限(2008),表明该混合基质膜在CO的分离应用上具有潜力。
Mixed matrix membranes(MMMs)have promising applications in the field of gas separation,and metal-organic frameworks(MOFs)are often used as fillers to prepare MMMs due to their high porosity and organic linking groups.However,the improvement of gas separation performance of MMMs is limited due to the interfacial compatibility between MOFs and polymers.Herein,a functionalized ZrMOF(UiO-66-AC)was synthesized to prepare mixed matrix membranes with poly(ether-b-amide)(Pebax).The introduction of groups such as carbonyl and carboxyl groups in the filler provided strong interfacial interactions between MOFs and the polymer matrix.Compared with pristine Pebax membranes,the gas permeability of UiO-66-AC/Pebax MMMs was significantly improved.When the filler content was6%,the CO_(2)permeability coefficient of the membrane was 102.4 Barrer,the CO_(2)/N_(2)and CO_(2)/CH_(4)selectivities were 90.6 and 26.0,respectively,and the CO_(2)/N_(2)separation performance exceeded the Robeson upper bond(2008),indicating that the UiO-66-AC/Pebax MMMs had potential for CO_(2)separation applications.
作者
方龙龙
郑文姬
宁梦佳
张明扬
杨雨晴
代岩
贺高红
FANG Longlong;ZHENG Wenji;NING Mengjia;ZHANG Mingyang;YANG Yuqing;DAI Yan;HE Gaohong(School of Chemical Engineering at Panjin,Dalian University of Technology,Panjin 124221,Liaoning,China;Panjin Institute of Industrial Technology,Liaoning Key Laboratory of Chemical Additive Synthesis and Separation,Dalian University of Technology,Panjin 124221,Liaoning,China;School of Petrochemical Engineering,Shenyang University of Technology,Liaoyang 111003,Liaoning,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2022年第9期4954-4962,共9页
Chemical Industry and Engineering Progress
基金
国家自然科学基金创新研究群体(22021005)
辽宁省“兴辽英才”计划青年拔尖人才(XLYC2007040)
辽宁省化学助剂与合成重点实验室开放课题(ZJKF2002,ZJKF2016)
辽宁“百千万人才工程”培养经费项目。
