期刊
CARBOHYDRATE POLYMERS
卷 107, 期 -, 页码 232-240出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2014.02.073
关键词
Semi-IPNs hydrogel; Wheat straw cellulose; Swelling; Deswelling
资金
- National Natural Science Foundation of China [21007034]
- Universities Innovation Projects of Jinan City [20130380]
A novel wheat straw cellulose-g-poly(potassium acrylate)/polyvinyl alcohol (WSC-g-PKA/PVA) semi-interpenetrating polymer networks (semi-IPNs) hydrogel was prepared by polymerizing wheat straw and an aqueous solution of acrylic acid (AA), and further semi-interpenetrating with PVA occurred during the chemosynthesis. The swelling and deswelling properties of WSC-g-PKA/PVA semi-IPNs hydrogel and WSC-g-PKA hydrogel were studied and compared in various pH solutions, salt solutions, temperatures, particle sizes and ionic strength. The results indicated that both hydrogels had the largest swelling capacity at pH = 6, and the effect of ions on the swelling of hydrogels was in the order: Na+ > KI+ > Mg2+ > Ca2+. The Schott's pseudo second order model can be effectively used to evaluate swelling kinetics of hydrogels. Moreover, the semi-IPNs hydrogel had improved swelling-deswelling properties compared with that of WSC-g-PKA hydrogel. (C) 2014 Elsevier Ltd. All rights reserved.
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