Understanding Gas Transport in Polymer-Grafted Nanoparticle Assemblies.

ABSTRACT: We rationalize the unusual gas transport behavior of polymer-grafted nanoparticle (GNP) membranes. While gas permeabilities depend specifically on the chemistry of the polymers considered, we focus here on permeabilities relative to the corresponding pure polymer which show interesting, "universal" behavior. For a given NP radius, R_c, and for large enough areal grafting densities, σ, to be in the dense brush regime we find that gas permeability enhancements display a maximum as a function of the graft chain molecular weight, M_n. Based on a recently proposed theory for the structure of a spherical brush in a melt of GNPs, we conjecture that this peak permeability occurs when the densely grafted polymer brush has the highest, packing-induced extension free energy per ch

SUBMITTER: Bilchak CR 

PROVIDER: S-EPMC9377655 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature