A novel ultrafiltration (UF) membrane with controllable selectivity for protein separation

Preparation of fouling resistant PSF flat sheet UF membrane using amphiphilic polyurethane macromolecules

“…In recent years, ultrafiltration (UF) is used in various separation processes in many industries like textile, food, paper [1][2][3], desalination [4], protein separation [5], and pharmaceutical tissue and gene engineering [6]. It is a pressure driven separation process with pore size in the range of 1 nm to 100 nm and can separate macromolecules like protein and colloids.…”

“…Commercial UF membranes are fabricated from various polymers like polypropylene, polyvinylidene fluoride, cellulose acetate, polyacrylonitrile, polysulfone (PSF) and polyethersulfone (PES) [7]. Among these polymers PSF is largely used as membrane material because of its good physicochemical stability, effectivity in a wide pH range (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13), thermal stability (≈ 80°C), resistance to chlorine (≈200 ppm) and oxidation. The solubility of PSF is another big advantage; it allows co-dissolution of other polymers to fabricate blended membranes.…”

Optimized permeation and antifouling of PVDF hybrid ultrafiltration membranes: synergistic effect of dispersion and migration for fluorinated graphene oxide

“…Those could be a result of FGO-10 dispersing and migrating in membranes, which played a critical role in elevating the antifouling property of hybrid membranes because the hydrophilicity and low surface free energy of membranes might be beneficial to entrap pollutants and more easily wash them away by water (Yang et al 2011). However, the FRR of PVDF/FGO-3, PVDF/FGO-5, and PVDF/FGO-20 membranes were lower than that of PVDF/GO membranes, due to the fact that plenty of nanoparticles were aggregated or embedded in the polymer matrix, decreasing the hydrophilicity of membranes (Ji et al 2012;Li et al 2013;Shao et al 2014).…”

An improved process for polyvinylidene fluoride membrane preparation by using a water soluble diluent via thermally induced phase separation technique

“…The number of the unit could be adjusted easily. It is especially suited to the treatment of heat sensitive materials and is widely applied in the fields of food, medicine and bio-chemistry [1][2][3]. Recently the environment pollution is attracting more and more attentions and the requirement for urban and industry waste water treatment increases gradually.…”