Journal
DESALINATION
Volume 316, Issue -, Pages 137-145Publisher
ELSEVIER
DOI: 10.1016/j.desal.2013.02.005
Keywords
PVDF membrane; Solvent power; Polymorphism; Phase inversion
Categories
Funding
- National Natural Science Foundation of China [51273211]
- National 863 Foundation of China [2012AA03A605]
- Welfare Technology Application Research Project [2011C31002]
- International Scientific and Technological Cooperation Project [2012DFR50470]
Ask authors/readers for more resources
Polyvinylidene fluoride (PVDF) membranes were prepared via the phase inversion method. The focus of this paper was put on the effects of four specific solvents with different solubility power including hexamethylphosphoramide (HMPA), trimethylphosphate (TMP), N,N-dimethylformamide (DMF) and triethylphosphate (TEP) on membrane polymorphism. Polymorphism of PVDF membranes was analyzed by wide-angle X-ray diffraction (WAXD), Fourier transform infrared spectroscopy (FTIR), Fourier transform infrared spectroscopy-attenuated total reflectance (FTIR-ATR), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) respectively. All results revealed that the dissolution of PVDF in different solvents had a great influence on the membrane crystalline phase. The well dissolved PVDF solution tended to form alpha phase during phase inversion process while the poorly dissolved PVDF solution favored the formation of beta phase. Furthermore, a soft coagulation bath was used during the phase inversion process to enhance the filtration permeability of the PVDF membranes. The fouling resistance to protein and mechanical properties of the membranes were also investigated. (C) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available