化工进展

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壳聚糖固载环糊精微球的制备及吸附硝基酚

葛亚芳,李明春,辛梅华,谢 峰   

  1. 华侨大学材料科学与工程学院,福建省高校功能材料重点实验室
  • 出版日期:2010-02-05 发布日期:2010-02-05

Chitosan beads bearing β- cyclodextrin, the preparation and adsorption study for dinitrophenol

GE Yafang,LI Mingchun,XIN Meihua,XIE Feng   

  1. College of Material Science and Engineering,Huaqiao University,The Key Laboratory for Functional Materials of Fujian Higher Education
  • Online:2010-02-05 Published:2010-02-05

摘要: 反相悬浮法制备甲醛保护壳聚糖(CTS)微球,环氧氯丙烷为交联剂β-环糊精反应制得壳聚糖固载环糊精微球。产物用红外光谱、扫描电子显微镜和X射线衍射仪进行表征,并用于吸附2,4-二硝基酚研究。考察了吸附时间、溶液pH值、酚浓度和NaCl含量对吸附的影响。实验结果表明,壳聚糖固载环糊精(CTS-CD)微球具有较好的耐酸碱性能,在pH值为3.6 条件下,对2,4-二硝基酚的吸附快速达到平衡,吸附量为325 mg/g,吸附符合Freundlich 等温方程和二级动力学方程。

Abstract: Chitosan microspheres immobilized with β-cyclodextrin were prepared by an inverse phase suspension method and cross-linked with epichlorohydrin. Structure of the microspheres was characterized by FTIR,SEM and XRD. The adsorption behavior of the microspheres for 2,4- dinitrophenol was investigated with the effects of adsorption time,pH,sodium chloride content and phenol concentration. Experimental results indicated that the microspheres are insoluble in acidic and basic solutions,and are capable to adsorb 2,4-dinitrophenol effectively. The adsorption reached to 325 mg/g instantaneously for a solution with pH 3.6. The adsorption behavior for 2,4- dinitrophenol of the modified chitosan microspheres is fitted into the Freundlich isotherms and pseudo second-order kinetics equation.

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