A strategy to enhance CO2 permeability of well-defined hyper-branched polymers with dense polyoxyethylene comb graft
Abstract(#br)Hyper-branched polymers comprised of dense polyoxyethylene (POE) comb graft and poly(methyl methacrylate) (PMMA) backbone are prepared with a well-defined chemical structure and the gas transportation properties are investigated. The CO 2 permeation is strongly dependent on the POE weight fraction. To enhance the CO 2 permeability, a thin film layer of the hyper-branched polymers is formed on a polydimethylsiloxane (PDMS) support with thickness less than 60\u003cce:hsp sp=\"0.25\"/\u003eµm, where poly(vinyl alcohol) (PVA) is blended to improve the membrane formability.