Is PVDF hydrophobic or hydrophilic?
Polyvinylidene Fluoride (PVDF) membrane is a naturally hydrophobic, unsupported membrane, it has received great attention because of its outstanding properties including high thermal stability, excellent mechanical strength and chemical resistance, which makes it has good resistance to organic solvents, corrosion.
Can PVDF be recycled?
PVDF is recyclable and can be used for energy recovery.
Is PVDF water soluble?
Polyvinylidene fluoride or polyvinylidene difluoride (PVDF) is a highly non-reactive thermoplastic fluoropolymer produced by the polymerization of vinylidene difluoride….Polyvinylidene fluoride.
| Names | |
|---|---|
| Chemical formula | −(C2H2F2)n− |
| Appearance | Whitish or translucent solid |
| Solubility in water | Insoluble |
| Structure |
How do you synthesize PVDF?
PVDF (homopolymers and copolymers) is generally synthesized by the free radical polymerization of 1,1-difluoroethylene (CH2=CF2). The polymerization takes place in the suspension or emulsion from 10-150°C and pressure of 10-300 atm. The material obtained is then processed into film or sheets.
What is the best solvent for PVDF?
All Answers (9) Best solvent for in dissolving PVDF is Dimethylacetamide which is non-toxic solvent.
What are the advantages and disadvantages of PVDF and nitrocellulose membranes?
PVDF has a protein binding capacity of 170 to 200 μg/cm2 while nitrocellulose has a protein binding capacity of 80 to 100 μg/cm2. Since PVDF has a higher protein binding capacity, it also offers higher sensitivity.
What is the difference between PTFE and PVDF?
The big difference between PTFE and PVDF is that PTFE membranes can be used in the filtration of strong acids and aggressive solutions, but PVDF membranes are more suited for the filtration of non-aggressive aqueous and mild organic solutions.
How is fluorine eliminated from a PVDF membrane?
Energy dispersive X-ray analysis (EDX) and Fourier-transform infrared (FTIR) spectroscopy were used to analyze the elements of the membrane surfaces. It was shown that up to 57% of the fluorine on the membrane surface could be eliminated by the amine treatment.
Are there any problems with surface Hydrophilization of PVDF?
However, the potential problems associated with its hydrophobicity (e.g., tube-sheet leak-through and surface fouling) have compromised the performance of PVDF membranes. In this study, we proposed a method for surface hydrophilization of PVDF membranes via amine treatment.
How does amine concentration affect hydrophilicity of PVDF membranes?
The effects of the concentration of the amine solution, treatment temperature and treatment time on the surface hydrophilicity, antifouling performance and permeation properties of the modified membranes were investigated.
What kind of plastic is polyvinylidene fluoride ( PVDF )?
Polyvinylidene fluoride or polyvinylidene difluoride (PVDF) is a highly non-reactive thermoplastic fluoropolymer produced by the polymerization of vinylidene difluoride. PVDF is a specialty plastic used in applications requiring the highest purity, as well as resistance to solvents, acids and hydrocarbons.
https://www.youtube.com/watch?v=7SVHqK_mFtQ