title: Synthesis, characterization, and swelling behaviors of salt-sensitive maize bran-poly(acrylic acid) superabsorbent hydrogel.
abstract: 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'-methylenebis(acrylamide)). Under the optimized conditions, maize bran-poly(acrylic acid) was obtained (2507 g g(-1) in distilled water and 658 g g(-1) 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.
authors.affiliation: College of Chemistry, Jilin University , Changchun 130012, People's Republic of China.
authors.forename: Mingyue
authors.initials: M
authors.lastname: Zhang
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Cheng
authors.forename: Tianqi
authors.initials: T
authors.lastname: Zhao
authors.forename: Mengzhu
authors.initials: M
authors.lastname: Liu
authors.forename: Meijuan
authors.initials: M
authors.lastname: Hu
authors.forename: Junfeng
authors.initials: J
authors.lastname: Li
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D004058:Diffusion; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000737:chemistry*; D007700:Kinetics; D010936:Plant Extracts / Q000737:chemistry*; D058105:Polymerization; D003313:Zea mays / Q000737:chemistry*
chemical_list: D000180:Acrylic Resins; D010936:Plant Extracts; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; C006903:carbopol 940