Figure 4

SEM images of the blank PES and mixed matrix PES membranes that were prepared using 1 NMP: 9 DMF solvents mix without (A,C,E) and with (B,D,F) 0.1 wt% of Lithium chloride. The blank PES membrane (A,B), the mixed matrix PES membranes using Fe₁₀Ni₉₀ (C,D), and Fe₂₀Ni₈₀ (E,F) alloys were imaged at × 1000 and × 10,000 magnifications.