【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。更多还原

【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.更多还原