Gas Transport Behavior of Novel Modified MCM-48/ Polysulfone Mixed matrix membrane Coated by PDMS

Mesoporous MCM-48 silica was synthesized by templating method and the structure of particles was characterized by XRD, TEM, FTIR, TGA and N2 adsorption techniques. The surface modification of particles in order to introducing into PSF matrix was performed by DMDCS sylilation agent. PDMS surface coating of membranes was performed to repair possible surface defects and enhance selectivities of membranes. For all gases tested (N2, CO2, CH4 and O2), the permeability increased in proportion to the weight percent of MCM-48 present in the film and calculating CO2/CH4 and O2/N2 selectivitiesof PDMS coated membranes showed enhancement in ideal and actual selectivities both.