Journal
POLYMERS FOR ADVANCED TECHNOLOGIES
Volume 25, Issue 7, Pages 693-700Publisher
WILEY
DOI: 10.1002/pat.3272
Keywords
graft modification; PVDF; supercritical carbon dioxide; dye affinity
Categories
Funding
- Natural Science Foundation of China [50863004, 51003090, 51263020]
Ask authors/readers for more resources
We report a thermally induced graft copolymerization of acrylic acid and N-hydroxymethylacrylamide onto polyvinylidene fluoride microporous membrane by using supercritical carbon dioxide as a solvent and carrier agent. The effects of monomer mole ratio, pressure, reaction temperature, time, and initiator concentration on the degree of grafting were investigated. The morphology of the grafted membrane was studied via scanning electron microscopy. Attenuated total reflectance infrared spectroscopy spectroscopy and X-ray diffraction proved the existence of grafting monomers. The results of contact angle measurement and water filtration at different pH levels indicated pronounced pH-sensitive behavior and increased hydrophilicity of the polyvinylidene fluoride grafted membrane. In particular, the grafted membrane was applied to the removal of methylene blue with a relative rejection of 98.1% compared with 30.5% of rejection observed from the pristine polyvinylidene fluoride membrane. Copyright (c) 2014 John Wiley & Sons, Ltd.
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