Cross-Linked Polyimide/ZIF-8 Mixed-Matrix Membranes by In Situ Formation of ZIF-8: Effect of Cross-Linking on Their Propylene/Propane Separation. Academic Article

abstract

• Despite their potential for the scalable production of mixed-matrix membranes (MMMs), the MMMs prepared by the polymer-modification-enabled in situ metal-organic framework formation (PMMOF) process showed a considerable reduction in gas permeability as the filler loading increased. It was hypothesized that a correlation existed between the decrease in permeability and the change in the properties of the polymer, such as free volume and chain flexibility, upon in situ MOF formation. Herein, we aim to address the permeability reduction by using a cross-linked polyimide (6FDA-DAM:DABA (3:2)). It was found the degree of cross-linking affected not only the properties of the polymer, but also the in situ formation of the ZIF-8 filler particles in the cross-linked polymer. The proper degree of cross-linking resulted in suppressing C3H6 permeability reduction, suggesting a possible strategy to overcome the issue of PMMOF. The swelling of the polymer followed by chain rearrangement during the PMMOF, as well as the structural rigidity of the polymer, were found to be critical in mitigating permeability reduction.

authors

• Jeong, Hae-Kwon

published proceedings

• Membranes (Basel)

altmetric score

• 0.75

author list (cited authors)

• Park, S., & Jeong, H.

citation count

• 1

complete list of authors

• Park, Sunghwan||Jeong, Hae-Kwon

publication date

• January 2022

publisher

• MDPI  Publisher

published in

• Membranes  Journal

keywords

• In Situ Growth
• Mixed-matrix Membrane
• Polymer Cross-linking
• Propylene/propane Separation
• Zeolitic Imidazolate Framework

Digital Object Identifier (DOI)

• 10.3390/membranes12100964

start page

• 964

end page

• 964

volume

• 12

issue

• 10

URL

• http://dx.doi.org/10.3390/membranes12100964