Fabrication and characterization of polysulfone-graphene oxide mixed matrix membranes for theeffect of glass transition temperature of polymer on the selective layer for separation

The polysulfone mixed matrix membranes (MMM) with concentrations ofgraphene oxide (۰.۰, ۰.۲۵ and ۰.۵ wt.% of polymer) fabricated by a phaseseparation method.the obtained results show that the kinetic selectivity means theratio of the penetration coefficients of two gases, which expresses the differentsizes of the two gases CO۲/N۲ and CO۲/CH۴. first, by adding ۰.۲۵ percent byweight of graphene oxide to the composite matrix, the selectivity of CO۲/N۲became ۱۲.۲۴ and ۵۰ percent by weight of graphene oxide was ۱۷.۷۹. whileCO۲/CH۴ selectivity was ۱۰.۹۴ and ۱۴.۱۴ respectively. For this purpose, byaddition of graphene oxide to the membrane structure, Tg increased considerablydue to the strong bond between polysulfone and graphene oxide. These strongbonds are due to the active agent groups present in the surface of graphene oxide,which have established a good bond with the polymer.

کلیدواژه ها:

Membrane gas separation ، Mixed matrix membrane ، Graphene oxide