玉米淀粉微球的制备及其对Cu^(2+)的吸附研究

Study on the Preparation of Corn Starch Microsphere and Research on the Adsorbents of Cu^(2+)

以玉米淀粉为主要原料,Span-60和Tween-80为乳化剂,以N,N-亚甲基双丙烯酰胺(MSDS)为交联剂,采用反相乳液法制备淀粉微球(CSM)。试验探讨交联剂用量和油水相体积比对淀粉微球平均粒径的影响;对比了淀粉和淀粉微球对金属铜离子的吸附性差异。结果表明:交联剂的用量和水油相体积比是影响微球粒径的主要因素;当交联剂用量为0.4 g,油水相体积比为5∶1时,被交联淀粉的吸附性最强;与淀粉相比,淀粉微球比淀粉对金属阳离子有更强的吸附作用,可作为一种良好吸附剂。XRD结果表明了所得淀粉微球的漫散衍射峰居多,FT-IR结果表明了淀粉与交联剂发生了明显的交联,SEM结果表明了所得淀粉微球结构致密、表面粗糙多孔。

The cord starch microspheres（CSM）were prepared in a W/O reverse emulsion via grafting and cross-linking polymerization with Span-60 and Tween-80 as emulsifier and N,N＇-Methylenebis（2-propenamide）as cross-linking agent.Content of MSDS and volume ratio between oil and water were discussed.It was compared the difference between cord and cord starch microsphere of adsorption to Cu2 ＋.The effects of content of MSDS and volume ratio of oil to water were investigated.The results showed that the optimal conditions of reaction correspond to starch concentration was 0.4 g and volume ratio of O/W was 5 ∶ 1.The cord starch microspheres were much more adsorption than starch to Cu2＋.CSM might be used as a favorable sorbent.The XRD results showed that the scattered peaks were in the majority.The FT-IR results showed that chemical crosslinking was bonded between the starch and MSDS.The SEM results showed that the CSMs were spherical particulates with rough surface and the microspheres＇ s framework was tightness.