Designing MOF-74/Pebax mixed matrix membranes for improved gas separation performance through metal cluster modification and aminosilane functionalization in MOF-74
Journal
Journal of Membrane Science
Journal Volume
735
Start Page
124577
ISSN
03767388
Date Issued
2025-11
Author(s)
Habte, Biadglign Ayalneh
Hu, Chien-Chieh
Wang, Chih-Feng
Hung, Wei-Song
Lee, Kueir-Rarn
Lai, Juin-Yih
Abstract
Mixed matrix membranes (MMMs) incorporating metal-organic frameworks (MOFs) hold significant promise for advancing gas separation technologies. The composition of the MOF and its interaction with the polymer matrix are critical factors, as they directly influence the overall performance of the membranes. In this study, MMMs were fabricated by incorporating eco-friendly synthesized MOF-74(M) particles (where M = Mg or Ni) into a Pebax matrix. The impact of metal cluster modification on the gas separation performance of MOF-74(M)/Pebax MMMs was investigated. To enhance the interaction between the additive and the Pebax, MOF-74(M) particles were functionalized with 3-aminopropyl triethoxysilane (APTES). Among the various MMMs with different MOF-74(M) loadings, a 7.5 wt% APTES-functionalized MOF-74(M) loading exhibited optimal performance. Specifically, APTES functionalized MOF-74(Mg)/Pebax MMM achieved a CO₂ permeability of 172.5 Barrer (an 80 % increase), and a selectivity of 86.3 (a 70.5 % increase). Similarly, APTES functionalized MOF-74(Ni)/Pebax MMM demonstrated a remarkable CO₂ permeability of 189 Barrer (a 97 % increase) and a selectivity of 83.3 (a 64.5 % increase) relative to the pristine Pebax membrane. These results underscore the potential of the synergistic effects of MOF-polymer interactions and metal cluster modification in the development of advanced CO₂ capture MMMs.
Subjects
Aminosilane functionalized MOF-74(M)
CO₂ capture
Mixed matrix membrane
MOF-74(M)
SDGs
Publisher
Elsevier B.V.
Type
journal article