Interface engineering in MOF/crosslinked polyimide mixed matrix membranes for enhanced propylene/propane separation performance and plasticization resistance

Preparation of Free-Standing Defect-Free ZIF-8/PVA Membranes via Confined Reaction at the Quasi-Interface

“…For epitaxial MOF membranes, especially defeat-free epitaxial MOF membranes, they have considerable separation and permeance performance due to the regular pore structure of the MOF. However, the MOF layer is not self-standing, porous substrates must be required, and poor mechanical stability severely limits the application of epitaxial MOF membranes. − Processing MOFs with polymers to fabricate MMMs may address the mechanical stability issues to some extent, while selectivity and permeability of the membrane will certainly compromise due to the MOF particle agglomeration, low loading rate, and pore plugging stemmed. − Thus, developing a facile strategy to fabricate a MOF membrane with the advantage of an epitaxial MOF membrane and MMM holds great appeal. The phase interface is a powerful tool for the regulation of the MOF membrane architecture.…”

Mixed Matrix Membranes for C2H4/C2H6 Separation Using a Phosphate Anion-Pillared Microporous Material

“…Except for the polymer matrix, the filler materials are also essential to the separation performance of MMMs. 30,31 Metal−organic framework materials (MOFs) are three-dimensional frameworks self-assembled by organic/inorganic ligands and inorganic metal ions or clusters. With high specific surface area, porosity, tunability of pore size and particle size, modifiability and diversity of species, MOFs exhibit excellent advantages in MMM preparation.…”

“…Ethylcellulose (EC), with a large free volume and a low glass transition temperature, shows a potential application in olefin/paraffin separation. Except for the polymer matrix, the filler materials are also essential to the separation performance of MMMs. , Metal–organic framework materials (MOFs) are three-dimensional frameworks self-assembled by organic/inorganic ligands and inorganic metal ions or clusters. With high specific surface area, porosity, tunability of pore size and particle size, modifiability and diversity of species, MOFs exhibit excellent advantages in MMM preparation. , Many MOF materials such as ZIFs, , HKUST-1, M-MOF-74 (M = Mg, Co, Mn, Fe, and Ni), , M-gallate (M = Mg, Co, and Ni), GeFSIX-3-Ni, and UTSA-280 have been added to polymer matrices to prepare MMMs since these materials prefer C 2 H 4 adsorption over C 2 H 6 .…”

Prospects for the synthesis and application of copolyimides based on tetracarboxylic acid dianhydride mixtures

“…At present several brands of industrial polyimides are known, such as Ultem, Kapton, P84 and some others. These industrial polyimides are used to make high-strength and heatresistant films, fibers, electrical insulation, structural parts and filtration membranes [15][16][17][18][19]. Properties of commercially available polyimides are insufficient for obtaining a number of special polymeric materials.…”