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Superabsorbent hydrogels from starch-g-PAN: Effect of some reaction variables on swelling behavior
Zohuriaan Mehr, M. J ; Sharif University of Technology | 2003
211
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- Type of Document: Article
- Publisher: 2003
- Abstract:
- Two series of alkali hydrolyzed starch-g-polyacrylonitrile (H-SPAN) superabsorbents were prepared from granular and gelatinized corn starches. The grafting parameters of SPAN copolymers were determined and the polymers were analyzed by FTIR spectroscopy. A combination of three influencing factors (i.e. thermal pre-treatment of the initial starch, presence or absence of oxygen in the stage of ceric-initiated PAN grafting, and neutralization after alkali treatment) on swelling characteristics of the final hydrogel was evaluated in a practical viewpoint. The superabsorbents were discriminated according to their swelling behavior in water and different aqueous salt solutions. The swelling characteristics as well as their salt sensitivity differences were investigated
- Keywords:
- Polyacrylonitrile grafting ; Salt sensitivity ; Starch ; Superabsorbent hydrogel ; Swelling behavior
- Source: Journal of Polymer Materials ; Volume 20, Issue 1 , 2003 , Pages 113-120 ; 09700838 (ISSN)