Authors: Ali Pourjavadi Mehran Kurdtabar Gholam R Mahdavinia Hossein Hosseinzadeh
Publish Date: 2006/07/27
Volume: 57, Issue: 6, Pages: 813-824
Abstract
In this work we synthesize a novel proteinbased superabsorbent hydrogel and study its swelling behavior The crosslinking graft copolymerization of acrylic acid AA onto the hydrolyzed collagen as a protein backbone was carried out in a homogeneous medium Potassium persulfate KPS as an initiator and NN′methylene bisacrylamide MBA as a crosslinker were used The product’s structure was established using FTIR spectroscopy We were systematically optimized the certain variables of the graft copolymerization ie the monomer the initiator and the crosslinker concentration to achieve a hydrogel with maximum swelling capacity Under this condition maximum capacity of swelling in distilled water was found to be 920 g/g Morphology of the optimized sample was examined by scanning electron microscopy SEM The swelling ratio in various salt solutions was also determined Additionally the swelling of superabsorbing hydrogels was measured in solutions with pH ranged from 1 to 13 The synthesized hydrogel exhibited a pHresponsiveness character so that a swellingcollapsing pulsatile behavior was recorded at pH 2 and 8
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