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Synthesis and swelling properties of β-cyclodextrin-based superabsorbent resin with network structure Zhanhua Huang∗, Shouxin Liu, Guizhen Fang, Bin Zhang Key laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China 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 ofβ-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 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. © 2012 Elsevier Ltd. All rights reserved |
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基于β环糊精类具有网络结构超吸收性树脂的合成和溶胀性能。 Zhanhua Huang∗, Shouxin Liu, Guizhen Fang, Bin Zhang 教育部生物材料科学和技术重点实验室，东北林业大学，黑龙江哈尔滨 150040，中国。 用反相悬浮法合成了一种可生物降解的、β环糊精类超吸收性树脂。用扫描电子显微镜，傅里叶变换红外光谱和差示扫描量热法研究了树脂的微观结构，化学结构和热性能。对合成条件（交联剂，丙烯酸与丙烯酰胺的质量比，β环糊精与总单体的质量比，中和度，引发剂用量，以及反应时间）的影响进行了优化，从而实现了树脂膨胀量的最大化。在蒸馏水中优化树脂的吸水率为1544.76克/克，而在0.9％ NaCl（重量百分比）是144.52克/克。该树脂是热塑性的，而且对pH值敏感，具有良好的耐盐性，在氯化钙（2）和氯化铝（3）溶液中，随时间增长溶胀达到最大值。该干树脂的断裂表面含有许多气孔。溶胀后，内部的水凝胶具有典型的三维网状结构。在30℃下用香菇处理该树脂18天后，生物降解达71.2％。 |
2楼2014-11-03 08:39:23