Design strategy of poly(vinylidene fluoride) membranes for water treatment

In situ construction strategy for three-dimensional Janus cellulose aerogel with highly efficient oil–water separation performance: from hydrophobicity to asymmetric wettability

“…Researchers have successfully constructed two-dimensional (2D) Janus materials, including the Janus copper mesh membrane 10,11 and Janus polyvinylidene fluoride membrane. 12,13 These Janus materials showed ideal comprehensive separation properties for various oil–water mixtures, as well as oil–water emulsions. 14,15…”

“…Researchers have successfully constructed two-dimensional (2D) Janus materials, including the Janus copper mesh membrane 10,11 and Janus polyvinylidene fluoride membrane. 12,13 These Janus materials showed ideal comprehensive separation properties for various oil-water mixtures, as well as oil-water emulsions. 14,15 The three-dimensional (3D) Janus material is a stronger competitor in the field of new separation materials because of its high porosity, low density, high specific surface area, and strong adsorption capacity.…”

Dielectrophoresis-Based Universal Membrane Antifouling Strategy toward Colloidal Foulants

“…9 Recently, applying an external electric field as a hopeful membrane antifouling method without damaging the membrane has received increasing attention of researchers because it could influence the movement of particles and avoid membrane damage. 10,11 Electro-ultrafiltration, which utilizes a conductive membrane as an electrode to directly affect the electrically related movement, 12,13 is an effective method to alleviate gel or cake layer formation on the membrane surface, which is composed of colloidal particles including suspended and dissolved solids, organic matter, bacteria, and viruses in ultrafiltration toward untreated municipal and industrial wastewater, especially in the popular MBR process. 2,14 At the same time, it can also increase the filtration flux, 15 primarily due to electrophoresis (EP) directly causing particles to move, 16 proximity of the surfaces.…”

“…Electro-ultrafiltration, which utilizes a conductive membrane as an electrode to directly affect the electrically related movement, , is an effective method to alleviate gel or cake layer formation on the membrane surface, which is composed of colloidal particles including suspended and dissolved solids, organic matter, bacteria, and viruses in ultrafiltration toward untreated municipal and industrial wastewater, especially in the popular MBR process. , At the same time, it can also increase the filtration flux, primarily due to electrophoresis (EP) directly causing particles to move, in some cases due to electroosmosis (EO) caused by the movement of ions in proximity of the surfaces. , One challenge of conventional methods is that a high voltage causes Joule heating-induced fluid vortices, electroosmosis, electrochemical reactions, and bubble formation . On the other hand, the basic principle of EP is linked to the force balance of charged particles, including the drag force, steric force, van der Waals force, and EP force in the permeate flow direction .…”

Scale Up and Validation of Novel Tri-Bore PVDF Hollow Fiber Membranes for Membrane Distillation Application in Desalination and Industrial Wastewater Recycling

“…In the present study, PVDF was employed as the base material due to its versatility, hydrophobicity, and resistance to a wide range of chemical reagents [22,33] for fabrication of novel tri-bore hollow fiber membranes (TBHF). The rationale behind using PVDF TBHF membranes for MD applications is that the tri-bore structure previously developed by Hua et al [34], Lu et al [35], and Luo et al [36] of Prof. Chung's group was expected to provide higher mechanical strength, higher liquid entry pressure (LEP w ) and more surface area per unit volume compared to single-bore hollow fiber membranes [37], leading to higher efficiency.…”