壳聚糖-DMDAAC-AM辐射接枝水凝胶的吸水性能研究

摘要

Chitosan-DMDAAC-AM hydrogel was prepared byγ-ray irradiation with Chitosan,acrylamide(AM), diallyl dimethyl ammonium chloride(DMDAAC)as raw material,N,N-methylene-bis-acrylamide as crosslinking agent. The swelling behaviors in distilled water,acids solution,bases solution,0.9%NaCl solution were studied. The results showed that the water adsorption of chitosan-DMDAAC-AM hydrogel increased as the time prolonging;the water adsorption of hydrogel in acids solution increased with the increasing pH;the water adsorption of hydrogel in bases solution decreased with the increasing pH;when the hydrogel reached equilibrium,the absorbencies capacity in distilled water,acids solution,0.9%NaCl solution,bases solution reduced in turn.%以壳聚糖，丙烯酰胺（AM）、二甲基二烯丙基氯化铵（DMDACC）为原料，N，N-亚甲基双丙烯酰胺为交联，采用γ射线辐照法制备了壳聚糖-DMDAAC-AM水凝胶.考察了壳聚糖-DMDAAC-AM水凝胶在蒸馏水、酸、碱溶液和0.9%NaCl溶液中的吸水性能.结果表明，随着时间的延长，壳聚糖-DMDAAC-AM水凝胶的吸水率均增加；在酸性环境中，凝胶吸水率随pH增大而增大；在碱性环境中，凝胶吸水率随pH增大而减小；当凝胶达到吸附平衡后，凝胶在蒸馏水、酸溶液、0.9%NaCl溶液、碱溶液中的吸水率依次减小.