摘要
用壳聚糖键接β-环糊精微球,合成了具有良好吸附效果的天然高分子絮凝剂.利用X-射线衍射仪、傅里叶变换红外光谱仪、扫描电镜和比表面孔径测定仪表征原料和产物的结构和微观形貌,通过改变搅拌时间、温度、pH值和甲基橙溶液质量浓度等实验条件,比较原料和键接产物对甲基橙溶液的吸附性能.结果表明,壳聚糖键接β-环糊精微球与β-环糊精微球和壳聚糖相比,吸附性能更为优异,且键接产物的吸附量随温度和pH值升高而增大,最大吸附量达到20mg·g-1,其吸附过程符合Freundlich吸附模型,是非自发的吸热过程.
β-cyclodextrin microsphere was prepared, and then was bonded SEM and surface area determinator were used to characterize the structure and to chitosan. XRD, IR, micro-morphology. Raw materials were compared with polymer in adsorbing methyl orange through changing stirring time, temperature, pH value and methyl orange concentration. It was proved that the adsorption of chitosan bonded β- cyclodextrin microsphere was better than that of chitosan and β-cyclodextrin microsphere. In addition, the adsorption of polymer increased with temperature and pH value, the maximum adsorption is 20 mg/g. The process of adsorption fitted Freundlich adsorption model well, moreover, the adsorption was an unspontaneously endotherrnic process.
出处
《暨南大学学报（自然科学与医学版）》
CAS
CSCD
北大核心
2009年第5期528-533,538,共7页
Journal of Jinan University(Natural Science & Medicine Edition)
基金
广东省自然科学基金项目(8451063201000041)
关键词
壳聚糖
Β-环糊精
微球
甲基橙
吸附
chitosan
β-cyclodextrin
microsphere
methyl orange
adsorption
