Work

Unveiling the distribution and molecular interactions of gases in membranes of PPO and PC with porous biphenyl-based knitting aryl polymer (K2Ph) and their influence on gas transport with NMR

Year: 2025

Type: article

Abstract: NMR spectroscopy combined with pulsed gradient spin-echo (PGSE) NMR are used to study, at the molecular scale, the interactions and transport of pure and mixed CO 2 and CH 4 in mixed matrix membranes (MMMs) of poly(2,6-dimethyl-p-phenylene oxide) (PPO) and poly[bisphenol A carbonate- co -4,4’-(3,3,5-trimethylcyclohexylidene) diphenol carbonate] (PC) with porous biphenyl-based knitting aryl polymer (K2Ph) as filler. The results of T 1 s relaxation times and chemical shifts measurements of the sorbed gases show two populations in the MMMs associated with the polymer and filler phases. Similarly, the analysis of the gases diffusion measurements leads to two components, fast and slow tentatively assigned to the filler and polymer phases in the MMMs, respectively. The comparison of NMR results with independent measurements of total gas permeability contributes to unveil the mechanisms of gas transport in membranes of glassy PPO and PC with porous K2Ph.

Source: Polymer

DOI: 10.1016/j.polymer.2025.129097

Authors: Mar López-González, Nastasia Yuriychuk, Esperanza Benito, Eva M. Maya, Leoncio Garrido

Institutions: Consejo Superior de Investigaciones Científicas, Instituto de Ciencia y Tecnología de Polímeros, Instituto de Ciencia de Materiales de Madrid

Language: English

Topic: Membrane Separation and Gas Transport

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,980

Funders: Ministerio de Ciencia e Innovación, Consejo Superior de Investigaciones Científicas