Plasma surface graft of acrylic acid onto a porous poly(vinylidene fluoride) membrane and its riboflavin permeation
✍ Scribed by Young Moo Lee; Jin Kie Shim
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 436 KB
- Volume
- 61
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
Acrylic acid was grafted onto the surface of commercial poly(viny1idene fluoride) (PVDF) membrane using plasma polymerization techniques. Graft reaction was confirmed by Xray photoelectron spectroscopy (XPS) spectra and attenuated total reflectance Fourier transform infrared spectra. Grafting rate was dependent on plasma exposure time. For argon plasma a t 30 W, grafting rate decreased after maximum rate was observed a t 30 s exposure. PVDF membrane with 30 s plasma exposure and subsequently grafted with acrylic acid (AA-3) showed the greatest O,,/F1, area ratio in XPS spectra. Thus its graft density and degree of polymerization were the largest among the graft membranes. Permeation of riboflavin through all poly(acry1ic acid)-g-PVDF membranes showed a decrease in permeability of riboflavin in pH 4-5.