Hollow fiber ultrafiltration membranes made from blends of PAN and PVP

Preparation and characterization of EVOH/PVP membranes via thermally induced phase separation

“…The same result was also observed for the BSA solution of 1.13 mg/ml, which could be ascribed to the higher hydrophilicity of EVOH/PVP membrane. Meanwhile, the amount of BSA adsorbed on the membranes surface decreased obviously with the increase of the PVP content, which was consistent with the widely accepted viewpoint [14][15][16].…”

“…Polyvinylpyrrolidone (PVP) is a common additive to enhance the hydrophilicity of polymer membrane [12][13][14][15][16]. The membrane porosity can be increased by adding the water-soluble PVP into the polymer solution during membrane formation process.…”

“…At the same time, the remaining PVP improves the hydrophilicity of the membrane. In recent years, the membranes made from blends of PVP and various polymers have been prepared, such as polyacrylonitrile (PAN) [14], cellulose acetate (CA) [15], polyether sulfone (PES) [16], etc., and the results have showed the efficiency of PVP additive. These membranes were all prepared by immersion-precipitation method.…”

Study of the surface character as responsible for controlling interfacial forces at membrane–feed interface

“…The modification of the membrane surface chemistry can be induced by using different techniques as blends, dip-coatings, wet chemical treatments, grafting, plasma, etc. [13][14][15][16]. As changes in surface free energies occur, dispersion as well as dipolar, induction, H-bonding or metallic interactions can direct the adhesion of chemical species on the membrane surface, controlling the separation.…”

Magnetization influence on the performance of ferrosoferric oxide: polyacrylonitrile membranes in ultrafiltration of pig blood solution

“…3 and a relative flux (J r ) calculated according to the Eq. 4 was used for comparison of membrane performance [26,27] since initial molecular weight cutoff and pure water flux of membranes are different.…”