Branched Metal-Organic Frameworks in Mixed-Matrix Membranes to Enhance Plasticization Resistance and Gas Transport
발표자
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초록
내용
Branched metal-organic framework (MOF) nanoparticles were used to form mixed-matrix membranes (MMMs) with polyimide matrix for gas separation. In general, the polyimide membrane has a few drawbacks such as separation performance limitation due to the permeability-selectivity trade-off and the plasticization issue at a high gas feed pressure. The branched MOF form a connected network that can increase the gas transport following the direction-guided branched structure without significant mass transfer resistance, surpassing theoretical permeability. In addition, the branched MOF nanoparticles are interconnected in the polymer matrix, forming a hierarchical network that can prevent the polymer chain from swelling at a high condensable gas feed pressure. In this talk, I will present branched MOF MMM, compared with the traditionally spherical MOF MMM, to understand the structural benefits in terms of molecular transport and polymer chain dimensional stability for efficient gas separation.