Metal-organic framework based mixed matrix hydrogel membranes for highly efficient gas separation

Advanced Membranes Pub Date : 2021-01-01 DOI:10.1016/j.advmem.2021.100009

Lei Tian , Yuxiu Sun , Xiangyu Guo , Zhihua Qiao , Chongli Zhong

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引用次数: 8

Abstract

MOF/polymer interface in mixed-matrix membranes (MMMs) has been considered as a crucial issue for achieving highly efficient gas separation performance. In this research, aluminum fumarate framework (A520) based mixed matrix hydrogel self-supported membranes (A520-MMHMs) were prepared by a facile UV photopolymerization. The hydrophilic A520 incorporated into hydrogel polymer effectively avoided the formation of interfacial defects and improved the compatibility between MOF and hydrogel matrix. As a result, the A520-MMHM possessed enhanced CO₂ permeability (∼432.87 Barrer) and CO₂/CH₄ selectivity (∼51.05) in comparison with pure hydrogel membrane. This performance data is very close to the updated McKeown 2019 upper bound, far exceeding the 2008 Robeson upper bound. Therefore, the design of hydrogel membrane incorporated with water-stable MOF may open up a new way for optimizing self-supported hydrogel membrane performance in gas separation.

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高效气体分离的金属-有机骨架混合基质水凝胶膜

混合基膜中MOF/聚合物的界面是实现高效气体分离的关键问题。本研究采用紫外光聚合法制备了富马酸铝骨架(A520)基混合基质水凝胶自支撑膜(A520- mmhms)。将亲水性A520掺入水凝胶聚合物中，有效避免了界面缺陷的形成，提高了MOF与水凝胶基质的相容性。结果表明，与纯水凝胶膜相比，A520-MMHM具有更高的CO2渗透性(~ 432.87 Barrer)和CO2/CH4选择性(~ 51.05)。这一性能数据非常接近更新的McKeown 2019上限，远远超过2008年Robeson上限。因此，加入水稳定MOF的水凝胶膜的设计可能为优化自支撑水凝胶膜在气体分离中的性能开辟了一条新的途径。

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来源期刊

Advanced Membranes

CiteScore

8.50

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0.00%

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