Synthesis of permselective membranes by radiation-induced grafting ofN-vinylpyrrolidone onto poly(tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride) (TFB) films

✍ Scribed by Dessouki, AM; Taher, NH; El-Arnaouty, MB

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 414 KB
• Volume: 48
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/(sici)1097-0126(199902)48:2<92::aid-pi100>3.0.co;2-3

✦ Synopsis

The radiation initiated grafting of N-vinylpyrrolidone (NVP) onto poly(tetraýuoroethylenehexaýuoropropylene-vinylidene ýuoride) (TFB) ülms has been investigated using a direct radiation technique. Diþ erent solvents were used for diluting the monomer, and it was found that dioxane is suitable for this grafting system. The inýuence of other grafting parameters, such as inhibitor, monomer concentration and dose rate, on the rate and yield of grafting was studied. The dependence of the grafting rate on the monomer concentration was found to be of the 1.1 order. Some physicochemical properties, such as swelling, thermal behaviour, mechanical and electrical conductivity, were investigated. A study was made to gain a better understanding of the observed water uptake using IR spectroscopy and scanning electron microscope (SEM) analysis. The possibility of some practical uses, e.g. removal of heavy metals from solution by grafted membranes was investigated.