N-羧甲基壳聚糖/膨润土复合材料的制备与吸附性能研究

摘要

N-carboxymethyl chitosan was prepared by using chloroacetic acid, chitosan, and sodium hydroxide as the main raw material, and then carboxymethyl chitosan/Bentonite composite materials loaded on the bentonite was prepared. Infra-red spectrum(IR) and Scanning Electron Microscope(SEM)techniques were ued to characterize the carboxymethyl chitosan/Bentonite composite material. The adsorption test of carboxymethyl chitosan/Bentonite composite materials for Methylene blue solution was investigated. The researches of the exeperimenial results show htat:When the temperature 30℃, pH equals 8, and the initial concentration of methylene blue solution of 6 mg/L, the adsorption of rate is 86.80%.%以一氯乙酸、壳聚糖、氢氧化钠为主要原料了制备N-羧甲基壳聚糖，并将其负载于膨润土上，制备得到了羧甲基壳聚糖/膨润土复合材料。利用红外(IR)、扫描电镜(SEM)对复合材料进行了表征。通过复合材料对亚甲基蓝溶液的吸附性能实验，优化出最佳吸附条件为30℃下，pH=8，亚甲基蓝溶液的初始浓度为6 mg/L时的吸附效果最好，达86.80%。