ZIF-8 modified with 2-undecylimidazolate as filler for mixed matrix membranes for CO₂ separation

Pérez-Miana, Marta (Universidad de Zaragoza) ; Luque-Alled, José Miguel (Universidad de Zaragoza) ; Yahia, Mohamed ; Mayoral, Álvaro ; Coronas, Joaquín (Universidad de Zaragoza)

Resumen: A novel modification of zeolitic imidazolate framework-8 (ZIF-8) with 2-undecylimidazolate (umIm) was explored to enhance its hydrophobic character and improve its compatibility with polymer of intrinsic microporosity PIM-1 when incorporated as a filler in mixed matrix membranes (MMMs). In addition to the study of the best conditions to exchange the structural ligand of ZIF-8 by umIm and the characterization (by FTIR, RMN, XRD, TGA, N2 adsorption and TEM) of the obtained material, comparative analyses were conducted using MMMs containing the original ZIF-8 and the modified version. Different loadings were applied to study the impact on gas separation properties. Remarkably, the MMM with the modified ZIF-8 demonstrated superior performance surpassing the Robeson upper bound line of 2008 and revealing the effectiveness of this MOF modification strategy. In fact, with the 10 wt% ZIF-8-umIm loading MMM, the highest value of CO2/N2 selectivity was 15.4 (12% higher than that of bare PIM-1) at a CO2 permeability of 16 667 Barrer (52% higher than that of bare PIM-1). These findings highlight the promising potential of the ZIF-8 modification with umIm as a valuable filler material for MMMs in gas separation applications.

Idioma: Inglés

DOI: 10.1039/d3ta07109j

Año: 2024

Publicado en: Journal of Materials Chemistry A 12, 17 (2024), 10316-10328
ISSN: 2050-7488

Financiación: info:eu-repo/grantAgreement/ES/DGA/E13-23R
Financiación: info:eu-repo/grantAgreement/ES/DGA/T68-23R
Financiación: info:eu-repo/grantAgreement/ES/MCIN-AEI/PID2019-104009RB-I00-AEI-10.13039-501100011033
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-C41

Tipo y forma: Artículo (Versión definitiva)

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