چكيده لاتين :
Superabsorbent polymers based on starch (St ) and polyacrylonitrile
(PAN) were prepared by alkaline hydrolysis of the physical mixture of
St and PAN inaqueous solution. The nitrile groups of PAN were
completely converted to a mixture of hydrophilic carboxamide and
carboxy late groups during alkaline hydrolys is, followed by in situ cross-linking of the PAN chains by the alkoxideions of St . A proposed
mechanism for hydrogel formation was suggested and the structure of the product was established using FTIR spectroscopy. Moreover , morphology of the samples was examined by scanning electron microscopy.
The factors that influenced the swelling capacity of the hydrogels were systematically optimized to achieve a hydrogel with swelling capacity as high as possible. Further more, the salt sensitivity of the hydrogels was investigated in different saline solutions . The pH-rever sibility and on-off swit ching properties of the hydrogels make the intelligent polymers good candidates for consideration as potential carriers of bioactive agents.
Finally, the swelling and de-swelling kinetics behaviors of the hydrogels were preliminarily investigated as well.
