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Synthesis and swelling properties of β-cyclodextrin-based superabsorbent resin with network structure
- Huang, Zhanhua, Liu, Shouxin, Fang, Guizhen, Zhang, Bin
- Carbohydrate polymers 2013 v.92 no.2 pp. 2314-2320
- Fourier transform infrared spectroscopy, Lentinula edodes, acrylamides, acrylic acid, beta-cyclodextrin, biodegradability, biodegradation, calcium chloride, chemical structure, cross-linking reagents, differential scanning calorimetry, hydrocolloids, microstructure, neutralization, scanning electron microscopy, sodium chloride, thermoplastics
- 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 1544.76g/g and that in 0.9wt.% NaCl was 144.52g/g. The resin, which is thermoplastic as well as pH-sensitive, had good salt resistance and underwent a maximum in swelling with time in CaCl2 and AlCl3 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.