PDMS–silica composite membranes with silane coupling for propylene separation
Abstract(#br)Polydimethylsiloxane (PDMS) coated membranes on a polysulfone (PSf) support were fabricated for propylene recovery from off-gas stream. PDMS coated membrane, however, showed trade-off trends that permeability and selectivity are inversely proportional to each other. Addition of silica nanoparticles of 12–400\u003cce:hsp sp=\"0.25\"/\u003enm size into PDMS matrix enhanced both separation factor and propylene permeance from 5.2 to 7.3 from 31 to 36\u003cce:hsp sp=\"0.25\"/\u003eGPU, respectively. Silica nanoparticles in composite membrane tended to agglomerate with each other.