Enhanced Carbon Dioxide Adsorption by a Mesoporous Poly(ionic

ABSTRACT: The synthesis of a mesoporous poly(ionic liquid) network via a hard-templating pathway is presented. Structure analysis was carried out using gas adsorption, small-angle X-ray scattering, and electron microscopy. The mesoporous poly(ionic liquid) showed a significantly faster CO2 adsorption than its nonporous counterpart. We found the adsorption is accompanied by strong interactions, which are also reflected in a high CO2 over N2 selectivity. Poly(ionic liquid)s (PILs) stand for a subclass ofpolyelectrolytes, the repeating unit of which has ionic liquid (IL) character. The research scope in PILs recently has significantly expanded.1 It is generally accepted that the incorporation of IL moieties into the polymer chain combines some of the unique characters of ILs with the common features of polymers. The synergistic effect produces immediately a variety of new (multi)functional materials,1−4 among which th