Amphiphilic Zeolitic Imidazolate Framework for Improved CO2 Separation in PIM-1 Mixed Matrix Membranes

Pérez-Miana, Marta (Universidad de Zaragoza) ; Luque-Alled, José Miguel (Universidad de Zaragoza) ; Mayoral, Álvaro ; Martínez-Visus, Íñigo (Universidad de Zaragoza) ; Foster, Andrew B. ; Budd, Peter M. ; Coronas, Joaquín (Universidad de Zaragoza)

Resumen: This study aims to enhance the compatibility between filler and polymer in mixed matrix membranes (MMMs), addressing an important challenge in membrane development. ZIF‐94, known for its affinity to CO2, was partially modified with 2‐undecylimidazolate (umIm) through the solvent‐assisted ligand exchange (SALE) method to improve its compatibility with the prototypical polymer of intrinsic microporosity PIM‐1. The modified ZIF‐94 (ZIF‐94‐umIm) can be considered as an amphiphilic MOF with both hydrophilic and hydrophobic moieties, while maintaining a considerably high CO2 adsorption capacity (2.34 mmol g−1 at 90 kPa and 0 °C). Gas separation experiments were performed using mixed gas compositions of 15/85 CO2/N2 at 3 bar and 35 °C. The resulting MMM with a 5 wt.% loading exhibited an enhanced CO2 separation performance, with ca. 70% and 10% increases in CO2 permeability (8900 Barrer) and CO2/N2 selectivity (20.2), respectively, compared to pristine PIM‐1 membranes. In addition, thin film nanocomposite membranes were prepared showing a 23.5 CO2/N2 selectivity at 2350 GPU of CO2. This modification strategy shows a great potential for improving the CO2 capture technologies, highlighting the potential of tailoring MOF fillers for advanced membrane materials in gas separation applications.

Idioma: Inglés

DOI: 10.1002/ange.202420879

Año: 2025

Publicado en: Angewandte Chemie 137, 22 (2025), e202420879 [12 pp.]
ISSN: 0044-8249

Financiación: info:eu-repo/grantAgreement/ES/DGA/E13-23R
Financiación: info:eu-repo/grantAgreement/ES/DGA/T68-23R
Financiación: info:eu-repo/grantAgreement/ES/MCIU/CNS2023-144346
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2022-138582OB-I00
Financiación: info:eu-repo/grantAgreement/ES/MICINN/RYC-2018-024561-I
Financiación: info:eu-repo/grantAgreement/EUR/MICINN/TED2021-130621B-C4
Financiación: info:eu-repo/grantAgreement/ES/MICIU/CEX2023-001286-S

Tipo y forma: Article (Published version)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)