title: Synthesis and swelling properties of β-cyclodextrin-based superabsorbent resin with network structure.
abstract: A biodegradable, β-cyclodextrin-based superabsorbent resin was synthesized by the inverse suspension method. The microstructure, chemical structure, and thermal performance of the resin were characterized by scanning electron microscopy, Fourier transform-infrared spectroscopy, and differential scanning calorimetry. The effects of the synthesis conditions (dosage of cross-linking agent, mass ratios of acrylic acid to acrylamide, mass ratios of β-cyclodextrin to total monomer, neutralization degree, initiator dosage, and reaction time) were optimized to achieve a resin with a maximum swelling capacity. The water absorbency of the optimized resin in distilled water was 1544.76 g/g and that in 0.9 wt.% NaCl was 144.52 g/g. The resin, which is thermoplastic as well as pH-sensitive, had good salt resistance and underwent a maximum in swelling with time in CaCl(2) and AlCl(3) solutions. The fracture surface of the dry resin contained many pores. After swelling, the internal hydrogel showed a typical three-dimensional network structure. The biodegradation of the resin reached 71.2% after 18 days treatment at 30 °C with Lentinus edodes.
authors: Key laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China. huangzh1975@163.com
authors: Zhanhua
authors: Z
authors: Huang
authors: Shouxin
authors: S
authors: Liu
authors: Guizhen
authors: G
authors: Fang
authors: Bin
authors: B
authors: Zhang
mesh_terms: D000042:Absorption; D060326:Chemistry Techniques, Synthetic; D002713:Chlorine / Q000737:chemistry; D005658:Fungi / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D006878:Hydroxides / Q000737:chemistry; D058105:Polymerization; D012117:Resins, Synthetic / Q000138:chemical synthesis* / Q000737:chemistry* / Q000378:metabolism; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D006878:Hydroxides; D012117:Resins, Synthetic; D047392:beta-Cyclodextrins; D014867:Water; D002713:Chlorine; C031356:hydroxide ion