How 2D nanoflakes improve transport in mixed matrix membranes: insights from a simple lattice model and dynamic mean field theory

17 January 2024, Version 2
This content is a preprint and has not undergone peer review at the time of posting.


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 representa- tion 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.


gas separation
Mixed matrix membrane
Mean field theory
Lattice model

Supplementary materials

Supporting Information
The supplementary material provides a table summarizing the total solid fraction for different MMM systems.


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