摘要
文中以锆基金属有机骨架(UiO-66-OH)、1-丁基-3-甲基咪唑六氟磷酸盐([BMim][PF_(6)])、聚醚胺D2000为原料合成了新型多孔液体(D2000-UiO-66-OH@[BMim][PF_(6)]),并以此为填料制备了D2000-UiO-66-OH@[BMim][PF_(6)]/聚醚嵌段酰胺(Pebax)混合基质膜来分离CO_(2)气体。采用红外分析、热重分析、差示扫描量热分析、扫描电镜等对D2000-UiO-66-OH@[BMim][PF_(6)]及混合基质膜进行了表征,通过实验测定了混合基质膜的气体分离性能。结果表明,不同[BMim][PF_(6)]包覆比例的UiO-66-OH@[BMim][PF_(6)]与UiO-66-OH的形貌一致。聚醚胺D2000接枝到了UiO-66-OH@[BMim][PF_(6)]表面,有效阻碍了填料在膜内团聚。D2000-UiO-66-OH@[BMim][PF_(6)]的功能性基团(胺基、醚基)增加了混合基质膜吸附CO_(2)的活性位点,实现了在膜内对CO_(2)的促进传递。相比于纯Pebax膜,质量分数为3%D2000-UiO-66-OH@[BMim][PF_(6)]/Pebax混合基质膜显示更高的CO_(2)分离性能,渗透性达到98.75 Bareer,选择性CO_(2)/N2达到82.63,比纯膜渗透性提高63.35%,比纯膜选择性提高122.7%,并超过了2008 Robeson上限。
A new porous liquid(D2000-UiO-66-OH@[BMim][PF_(6)])was synthesized with zirconium based organic framework(UiO-66-OH),1-butyl-3-methylimidazolium hexafluorophosphate([BMim][PF_(6)])and polyetheramine D2000.D2000-UiO-66-OH@[BMim][PF_(6)]/Pebax mixed matrix membranes(MMMs)were prepared to separate CO_(2) gas.FT-IR,TGA,DSC and SEM were used to characterize the properties of D2000-UiO-66-OH@[BMim][PF_(6)]and MMMs,and the gas separation performance of the MMMs was measured.The results show that UiO-66-OH@[BMim][PF_(6)]with different ratios have the same morphology as UiO-66-OH.Polyetheramine D2000 was grafted on the surface of UiO-66-OH@[BMim][PF_(6)],which effectively hindered the agglomeration of fillers in the MMMs.At the same time,the functional groups(amino and ether groups)contained in D2000-UiO-66-OH@[BMim][PF_(6)]also increase the active sites for CO_(2) adsorption of the MMMs,and realize the facilitate transport of CO_(2).Compared with pure Pebax membrane,the 3%D2000-UiO-66-OH@[BMim][PF_(6)]/Pebax MMM shows a permeability of 98.75 Bareer and a selective CO_(2)/N2 ratio of 82.63.The permeability is 63.35%higher than that of the pure membrane,and the selectivity is 122.7%higher than that of the pure membrane,surpassing the 2008 Robeson upper bound.
作者
张成鹏
刘红晶
赵微
赵旭
石美玲
薛涛
景小纯
李朝
Chengpeng Zhang;Hongjing Liu;Wei Zhao;Xu Zhao;Meiling Shi;Tao Xue;Xiaochun Jing;Zhao Li(School of Petrochemcial Engineering,Shenyang University of Technology,Liaoyang 111003,China)
出处
《高分子材料科学与工程》
北大核心
2025年第5期26-36,共11页
Polymer Materials Science & Engineering
基金
辽宁省教育厅重点攻关项目(JYTZD2023111,LZGD2019004)
辽宁百千万人才项目
辽宁省科技厅自然科学基金资助项目(20170540685,2014020117)。
关键词
聚醚胺
金属有机骨架
混合基质膜
离子液体
二氧化碳分离
polyetheramine
metal-organic framework
mixed matrix membrane
ionic liquid
CO_(2)separation
