Article ID Journal Published Year Pages File Type
639259 Journal of Membrane Science 2006 9 Pages PDF
Abstract

Polyethylene glycol (PEG) is grafted onto ionic polymers poly[p-vinylbenzyltrimethylammonium tetrafluoroborate] (P[VBTMA][BF4]) and poly[2-(methylacryloyloxy)ethyl-trimethylammoniumtetrafluoroborate] (P[MATMA][BF4]). Membranes made of P[VBTMA][BF4]-g-PEG and P[MATMA][BF4]-g-PEG are found to be CO2 selective for CO2/CH4 and CO2/N2 separations, and less brittle than those made of pure P[VBTMA][BF4] and P[MATMA][BF4]. At the same permeability, the P[MATMA][BF4]-g-PEG membranes are demonstrated to have a higher CO2 selectivity than the previous polymeric membranes. The selectivity of both P[VBTMA][BF4]-g-PEG and P[MATMA][BF4]-g-PEG is primarily due to the solubility differences, not the diffusivity differences.

Related Topics
Physical Sciences and Engineering Chemical Engineering Filtration and Separation
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