Journal
CARBOHYDRATE POLYMERS
Volume 89, Issue 2, Pages 478-485Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.03.031
Keywords
Gamma irradiation; Superabsorbent hydrogels; Tara gum; Acrylic acid
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Funding
- International Atomic Energy Agency (IAEA) through the TC [EGY/8/020]
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The main objective is to develop a new superabsorbent system especially for using in diaper applications. In this study, hydrogels based on Tara gum/acrylic acid (TG/AAc) were prepared by gamma irradiation, in the presence of N,N'-methylenebisacrylamide (MBAAm) as a crosslinking agent. The polymeric networks formed were characterized by FT-IR and evaluated by swelling studies as a function of MBAAm concentration, temperature and nature of the swelling medium. The swelling kinetics of the hydrogels was studied in terms of the diffusion exponent n. The results showed that the water diffusion into hydrogels is a non-Fickian type. Mechanical measurements (stress-strain) curves of hydrogels were evaluated to calculate the shear modulus values and the average molecular weight between crosslinks (Mc). Moreover, the absorption under load at 37 degrees C of water and urea aqueous solutions (as a major component of urine) by TG/AAc hydrogels was determined. (C) 2012 Elsevier Ltd. All rights reserved.
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