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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

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  1. Type of Document: Article
  2. Publisher: 2003
  3. Abstract:
  4. 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
  5. Keywords:
  6. Polyacrylonitrile grafting ; Salt sensitivity ; Starch ; Superabsorbent hydrogel ; Swelling behavior
  7. Source: Journal of Polymer Materials ; Volume 20, Issue 1 , 2003 , Pages 113-120 ; 09700838 (ISSN)