Two-step surface functionalization/alignment strategy to improve CO2/N2 separation from mixed matrix membranes based on PEBAX and graphene oxide

Lichaei, Mojtaba Mehdinia; Pazani, Farhang; Aroujalian, Abdolreza; Rodrigue, Denis

doi:10.1016/j.psep.2022.05.024

Cited by 15 publications

(1 citation statement)

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“…Extensive further experimentations with polymer–filler pairs led to a discovery that filler elements that do not possess their own porosity, such as 2D graphene and GO nanoflakes, may also enhance the separation performance of the hybrid material. − …”

Section: Introductionmentioning

confidence: 99%

How 2D Nanoflakes Improve Transport in Mixed Matrix Membranes: Insights from a Simple Lattice Model and Dynamic Mean Field Theory

Yuan,

Sarkisov

2024

ACS Appl. Mater. Interfaces

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Mixed matrix membranes (MMMs), incorporating graphene and graphene oxide structural fragments, have emerged as promising materials for challenging gas separation processes. What remains unclear is the actual molecular mechanism responsible for the enhanced permeability and perm-selectivity of these materials. With the fully atomistic models still unable to handle the required time and length scales, here, we employ a simple qualitative model based on the lattice representation of the physical system and dynamic mean field theory. We demonstrate that the performance enhancement results from the flux-regularization impact of the 2D nanoflakes and that this effect sensitively depends on the orientation of the nanoflakes and the properties of the interface between the nanoflakes and the polymer.

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