PIM-1/Holey Graphene Oxide Mixed Matrix Membranes for Gas Separation: Unveiling the Role of Holes

Luque-Alled J.M. ; Tamaddondar M. ; Foster A.B. ; Budd P.M. ; Gorgojo P. (Universidad de Zaragoza)

Resumen: PIM-1/holey graphene oxide (GO) mixed matrix membranes (MMMs) have been prepared and their gas separation performance for CO2/CH4 mixtures assessed. Nanopores have been created in the basal plane of gas-impermeable GO by chemical etching reactions, and the resulting holey flakes have been further chemically functionalized, either with octadecylamine (ODA) or with PIM-1 moieties, to aid their dispersion in PIM-1. It is found that nanopores barely promote gas transport through the graphene-like nanofiller for fresh membranes (tested right after preparation); however, the prepared hybrid PIM-1/holey GO membranes exhibit higher CO2 permeability and CO2/CH4 selectivity than the pure polymer membrane 150 days after preparation and 13 and 15% higher CO2 permeability for filler contents of 0.1% of octadecylamine-functionalized holey GO and 1% of (PIM-1)-functionalized holey GO, respectively. The most significant improvement is observed for the mitigation of physical aging, as MMMs using 10% of (PIM-1)-functionalized holey GO nanofillers are capable of maintaining up to 70% of their initial CO2 permeability after 150 days, whereas only 53% is kept for pure PIM-1 after the same period. The gas permeability of the nanofiller has been rationalized with the aid of the Maxwell-Wagner-Sillars equation. © 2021 American Chemical Society.

Idioma: Inglés

DOI: 10.1021/acsami.1c15640

Año: 2021

Publicado en: ACS applied materials & interfaces 13, 46 (2021), 55517-55533
ISSN: 1944-8244

Factor impacto JCR: 10.383 (2021)

Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 49 / 345 = 0.142 (2021) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 23 / 109 = 0.211 (2021) - Q1 - T1

Factor impacto CITESCORE: 14.4 - Materials Science (Q1)

Factor impacto SCIMAGO: 2.143 - Medicine (miscellaneous) (Q1) - Materials Science (miscellaneous) (Q1)

Tipo y forma: Artículo (PostPrint)

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