Dibasic ester solvents are introduced for PVDF membrane fabrication. These non-hazardous, biodegradable, cheap, and widely available.

• The air gap effect on PVDF hollow fiber membranes is much more evident for the dope solution with the high PVP concentration than low PVP concentration. • Large macro-voids/cavities in PVDF hollow fiber membranes are suppressed to the finger-like macro-voids and the separation layer is thickened when increasing PVP concentration in dope solution. • The hydrophilicity and viscosity of polymer ...

The work is based on the drying of PVDF-HFP gels with a procedure assisted by supercritical CO2 to obtain nano-sized porous membranes at high quality/low cost ratio. Poly(vinylidene fluoride) (PVDF) as homopolymer or copolymer with hexafluoropropylene (PVDF-HFP) is a very interesting material largely used in catalytic membrane reactors, chemical and biomedical applications and various filtratio...

Microporous poly(vinylidene fluoride)/poly(methyl methacrylate) (PVDF/PMMA) membranes were prepared using the phase-separation method. Then, the membranes were immersed in liquid electrolyte to form polymer electrolytes. The effects of PMMA on the morphology, degree of crystallinity, porosity, and electrolyte uptake of the PVDF membrane were studied. The addition of PMMA increased the pore size...

We aimed to investigate the relationship between membrane material and the development of membrane fouling in a membrane bioreactor (MBR) using membranes with different pore sizes and hydrophilicities. Batch filtration tests were performed using submerged single hollow fiber membrane ultrafiltration (UF) modules with different polymeric membrane materials including cellulose acetate (CA), polye...

Trilayer polypyrrole microactuators that can operate in air have previously been developed. They consist of two outer layers of the electroactive polymer polypyrrole (PPy) and one inner layer of a porous poly(vinylidene flouride) (PVDF) membrane containing a liquid electrolyte. The two outer layers of PPy are each connected with gold electrodes and separated by the porous PVDF membrane. This mi...

Proton conductive individual channels through a PVDF matrix have been designed using the ion track grafting technique. The chosen polyelectrolyte, a sulfonated polystyrene (PSSA), has been radiografted all along the linear and cylindrical ion tracks of irradiated PVDF leading to the creation of privileged paths for proton conduction from the anode to the cathode without inducing any further por...

The gas-liquid membrane contactor (GLMC) is a promising alternative gas absorption/desorption configuration for effective carbon dioxide (CO2 ) capture. The physicochemical properties of membranes may synergistically affect GLMC performances, especially during the long-term operations. In this work, commercial polypropylene (PP) and polyvinylidene fluoride (PVDF) hollow fiber (HF) membranes wer...

Ginsenosides separated by silica gel TLC blotted to a polyvinylidene difluoride (PVDF) membrane was treated with a NaIO4 solution followed by bovine serum albumin (BSA), resulting in a ginsenoside-BSA conjugate on a PVDF membrane. The blotted bands were stained with anti-ginsenoside Rg1 and Rb1 monoclonal antibodies (MAbs). The newly established double staining with the Western blotting methods...

Thermo-Electrochemical cells (Thermocells/TECs) transform thermal energy into electricity by means of electrochemical potential disequilibrium between electrodes induced by a temperature gradient (ΔT). Heat conduction across the terminals of the cell is one of the primary reasons for device inefficiency. Herein, we embed Poly(Vinylidene Fluoride) (PVDF) membrane in thermocells to mitigate the h...