Preparation and characterization of hydrophile nano-porous polyethersulfone membranes using synthesized poly(sulfoxide-amide) as additive in the casting solution

Development of high performance nano-porous polyethersulfone ultrafiltration membranes with hydrophilic surface and superior antifouling properties

“…Generally the fouling tendency of this hydrophobic polymer is excessive. The contact angle of PES membrane with 2 wt.% PVP in the casting solution has been reported 66.28 in previous study [19]. In the current study, appropriate chemicals were added into the PES casting solution to improve the PES membrane surface hydrophilicity.…”

“…Asymmetric polyethersulfone (PES) ultrafiltration membrane were prepared via phase inversion induced by immersion precipitation [18][19][20] using casting solutions containing PES, polyvinylpyrrolidone (PVP), polyethyleneglycole (PEG), cellulose acetate phthalate (CAP), acrylic acid (AA) and Triton X-100 in DMAC as solvent. For preparing the homogonous solution, all components were simultaneously blended with DMAc and mixed by mechanical stirrer for 12 h. The solution was sprinkled and cast using self-made casting knife with 75 mm thickness on polyester non-woven fabric.…”

“…Other researchers studied the effect of PVP molecular weight on PES membranes [15][16][17]. The effect of different surfactants and poly (sulfoxide amide) (PSA) as additives in the casting solution [18,19], PES/cellulose acetate phthalate (CAP) [20], PES/poly(amide imide) (PAI) [21] compositions on membrane performance and morphology was previously investigated by the current authors.…”

“…Accordingly the membranes were prepared with new modified casting solution containing PES/DMAC/CAP/PVP/PEG/acrylic acid/Triton X-100 using immersion precipitation technique. The type and composition of different additives were selected on the basis of previous works [19][20][21]. The hydrophilicity and morphology of membranes were investigated by means of contact angle measurements, scanning electron microscopy (SEM) and atomic force microscopy (AFM).…”

Optimization of ultrafiltration membrane fabrication using backpropagation neural network and genetic algorithm

“…PVP has two contradictory influences on membrane performances. On the one hand, since it is soluble in water coagulation bath, it is a pore-forming agent [46,47]. On the other hand, the addition of PVP sharply increases the viscosity of the casting solution thereby decreases the inlet velocity of nonsolvent and outlet velocity of solvent and additive and consequently makes a denser skin layer [48][49][50].…”