Membrane adsorbers with ultrahigh metal-organic framework loading for high flux separations

Hang Wang, Shuang Zhao, Yi Liu, Ruxin Yao, Xiaoqi Wang, Yuhua Cao, Dou Ma, Mingchu Zou, Anyuan Cao, Xiao Feng () and Bo Wang ()
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Hang Wang: Beijing Institute of Technology
Shuang Zhao: Beijing Institute of Technology
Yi Liu: Beijing Institute of Technology
Ruxin Yao: Beijing Institute of Technology
Xiaoqi Wang: Beijing Institute of Technology
Yuhua Cao: Beijing Institute of Technology
Dou Ma: Beijing Institute of Technology
Mingchu Zou: Peking University
Anyuan Cao: Peking University
Xiao Feng: Beijing Institute of Technology
Bo Wang: Beijing Institute of Technology

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract Metal-organic frameworks (MOFs) with high porosity and designable functionality make it possible to access the merits of high permeability and selectivity. However, scalable fabrication methods to produce mixed matrix membranes (MMMs) with good flexibility and ultrahigh MOF loading are urgently needed yet largely unmet. Herein, we report a thermally induced phase separation-hot pressing (TIPS-HoP) strategy to roll-to-roll produce 10 distinct MOF-membranes (loadings up to 86 wt%). Ultrahigh-molecular-weight polyethylene interweaving the MOF particles contributes to their mechanical strength. Rejections (99%) of organic dyes with a water flux of 125.7 L m–2 h–1 bar–1 under cross-flow filtration mode. The micron-sized channels between the MOF particles translate into fast water permeation, while the porous MOFs reject solutes through rapid adsorption. This strategy paves ways for developing high-performance membrane adsorbers for crucial separation processes. As a proof-of-concept, the abilities of the membrane adsorbers for separating racemates and proteins have been demonstrated.

Date: 2019
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DOI: 10.1038/s41467-019-12114-8

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