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Issue 3, 2019
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Modeling gas transport in polymer-grafted nanoparticle membranes

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Abstract

We use coarse-grained molecular dynamics simulations to study gas diffusion within nanocomposites consisting of matrix-free polymer-grafted nanoparticles. We compare the transport of gas penetrants in systems using polymer models with and without an angle potential and show that gas diffusion enhancement occurs in nanocomposite systems only with the angle potential. This enhancement is related to the free volume in the system, but the cage size experienced by the gas penetrant seems to be a more relevant indicator of gas diffusion enhancement. The enhancement seen in our simulations is smaller than that observed in experiments.

Graphical abstract: Modeling gas transport in polymer-grafted nanoparticle membranes

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Publication details

The article was received on 01 Nov 2018, accepted on 23 Nov 2018 and first published on 05 Dec 2018


Article type: Paper
DOI: 10.1039/C8SM02235F
Citation: Soft Matter, 2019,15, 424-432

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    Modeling gas transport in polymer-grafted nanoparticle membranes

    J. W. Barnett and S. K. Kumar, Soft Matter, 2019, 15, 424
    DOI: 10.1039/C8SM02235F

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