食品科学 ›› 2009, Vol. 30 ›› Issue (1): 31-34.doi: 10.7506/spkx1002-6630-200901006

• 基础研究 • 上一篇    下一篇

淀粉接枝共聚微球对Cd2+的吸附性能研究

宁青菊1,肖昊江1,李仲谨2,王 磊2,朱 雷2,余丽丽2   

  1. 1.陕西科技大学材料科学与工程学院 2.陕西科技大学化学与化工学院
  • 收稿日期:2007-12-11 修回日期:2008-04-14 出版日期:2009-01-01 发布日期:2010-12-29
  • 通讯作者: 宁青菊 E-mail:haojiang77@126.com
  • 基金资助:

    国家自然科学基金项目(50573046);陕西省教育厅产业化培育项目(02JC05)

Study on Adsorption Behavior of Starch Graft Copolymer Microspheres to Cadmium Ions

NING Qing-ju1,XIAO Hao-jiang1,LI Zhong-jin2,WANG Lei2,ZHU Lei2,YU Li-li2   

  1. (1.College of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi' an 710021, China;
    2.College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China)
  • Received:2007-12-11 Revised:2008-04-14 Online:2009-01-01 Published:2010-12-29
  • Contact: NING Qing-ju1, E-mail:haojiang77@126.com

摘要:

在反相悬浮体系中以K2S2O8-NaHSO3 引发N,N'- 亚甲基双丙烯酰胺与淀粉的接枝共聚,制备淀粉接枝共聚物微球,研究微球对Cd2+ 的吸附行为,利用红外、SEM、X 射线衍射仪和综合热分析仪对微球及其吸附产物进行表征,研究吸附机理。结果表明:微球对Cd2+ 吸附行为符合Langmiur 方程和Freundlich 方程;吸附Cd2+ 使微球的结晶结构被进一步破坏,结晶度下降,同时促进了微球中主链断裂。

关键词: 淀粉接枝共聚微球, 吸附, Cd2+, 机理

Abstract:

Starch graft copolymer microspheres were synthesized by inverse suspension polymerization with N,N'- methylenebisacrylamide and soluble starch, using K2S2O8-NaHSO3 as initiator. The adsorption behavior of starch graft copolymer microspheres to Cd2+ was investigated. The starch graft copolymer microspheres and their adsorption products were characterized with scan electron microscope (SEM), FT-IR spectroscopy, X-ray diffraction (XRD), and thermogravimetric analysis (TGA). The results showed that the adsorption behavior of the copolymer microspheres to Cd2+ is adapted to Langmiur and Freundlich adsorption isotherm equation. Furthermore, the adsorption of Cd2+ on microspheres not only decreases their crystallinity but promotes the rupture of bonds among their main chains.

Key words: starch graft copolymer microspheres, adsorption, Cd2+, behavior

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