Fabrication and characterization of polysulfone-graphene oxide mixed matrixmembranes for average surface roughness of the membranes and tensilestrength and elongation at break point of the membranes

The composite membrane is made a modified Hummer method. The polysulfonemixed matrix membranes (MMM) were fabricated by a phase separation method.Different concentrations of graphene oxide (۰.۰, ۰.۲۵ and ۰.۵ wt.% of polymer)were used. After fabrication of the membranes, the cross-sectional structure andtheir upper surface were assessed by scanning electron microscopy (SEM) and thesurface roughness of the membranes was assessed by atomic force microscopy(AFM). The mechanical and thermal stability of the fabricated membranes wereevaluated as well. The membrane tensile strength and length of the membrane atfracture point increased slightly with an increase in graphene oxide concentration.From the gas permeation test, by addition graphene oxide, the average surfaceroughness results obtained were ۱۲.۵۹, ۱۴.۰۲ and ۱۷.۳۳ respectively. The results oftensile strength and elongation at break point of the membranes are ۱.۲۳, ۱.۸, and۲.۲۵ (tensile strength), and ۶.۵۱, ۶.۸۹, and ۷.۱۲ (break point), respectively.

کلیدواژه ها:

Membrane gas separation ، Mixed matrix membrane ، Graphene oxide