Journal
CARBOHYDRATE POLYMERS
Volume 170, Issue -, Pages 254-263Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.04.091
Keywords
Interpenetrating polymer networks; Hemicellulose; Shear modulus; Hydrogel
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Funding
- Formas [2011-1542]
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Two methods with different cross-linking mechanisms for designing hemicellulose-based full interpenetrating polymer networks (IPNs) were developed through the sequential synthesis of full IPNs from O-acetyl-galactoglucomannan (AcGGM) utilizing free-radical polymerization and a thiol-ene click reaction. A faster swelling rate was observed for all IPN formulations compared with the single-network gels. The highly porous structure of the IPNs with small interconnected pores was verified using scanning electron microscopy. A rheological analysis revealed that the AcGGM IPNs fabricated by the free-radical polymerization of acrylamide and N-N'-methylenebisacrylamide (cross-linker) had shear storage modulus (G') values approximately 5 and 2.5 times higher than that of the corresponding precursor single networks of AcGGM. IPNs achieved through thiol-ene reactions between thiolated AcGGM and polyethylene glycol diacrylate had G' values 35-40 times higher than the single-network reference hydrogels. (C) 2017 Published by Elsevier Ltd.
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