Synthesis, Characterization, and Swelling Behaviors of Salt-Sensitive Maize Bran鈥揚oly(acrylic acid) Superabsorbent Hydrogel
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- 作者：Mingyue Zhang ; Zhiqiang Cheng ; Tianqi Zhao ; Mengzhu Liu ; Meijuan Hu ; Junfeng Li
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2014
- 出版时间：September 3, 2014
- 年：2014
- 卷：62
- 期：35
- 页码：8867-8874
- 全文大小：485K
- ISSN：1520-5118
文摘
A novel composite hydrogel was prepared via UV irradiation copolymerization of acrylic acid and maize bran (MB) in the presence of composite initiator (2,2-dimethoxy-2-phenylacetophenone and ammonium persulfate) and cross-linker (N,N鈥?methylenebis(acrylamide)). Under the optimized conditions, maize bran鈥損oly(acrylic acid) was obtained (2507 g g鈥? in distilled water and 658 g g鈥? in 0.9 wt % NaCl solution). Effects of granularity, salt concentration, and various cations and anions on water absorbency were investigated. It was found that swelling was extremely sensitive to the ionic strength and cation and anion type. Swelling kinetics and water diffusion mechanism in distilled water were also discussed. Moreover, the product showed excellent water retention capability under the condition of high temperature or high pressure. The salt sensitivity, good water absorbency, and excellent water retention capability of the hydrogels give this intelligentized polymer wide potential applications.