高岭土/羧甲基淀粉复合颗粒及其协同电流变效应  

Preparation and Synergetic Electrorheological Effects of Kaolinite/Carboxymethyl Starch Nanocomposite

作　　者：王宝祥[1] 李佳[1] 赵晓鹏[1] 

机构地区：[1]西北工业大学电流变技术研究所,141信箱西安710072

出　　处：《化学学报》2003年第2期240-244,共5页Acta Chimica Sinica

基　　金：国家杰出青年科学基金 (No.50 0 2 52 0 7); 863计划 (No .2 0 0 1AA32 71 30 )资助项目

摘　　要：通过二次插层取代法 ,以二甲基亚砜为前驱体 ,羧甲基淀粉二次插层取代制备了高岭土 羧甲基淀粉纳米复合材料 .结合XRD ,FTIR ,SEM和EDS等测试手段对复合材料的结构进行了表征 .研究结果发现 ,羧甲基淀粉经过二次插层取代引起了高岭土片层之间的剥离 ,形成剥离型纳米复合材料 .该复合材料制备成电流变液出现了较大的协同效应 ,具有很好的电流变行为 。In this paper, kaolinite/DMSO intercalate was used as precursor, and then carboxymethyl starch (CMS) was introduced by two-step intercalation to prepare kaolinite/CMS nanocomposite. According to the analysis of XRD, FTIR, SEM and EDS, it can be seen that the layers of kaolinite were exfoliated by the intercalation of carboxymethyl starch and the layers dispersed into the carboxymethyl starch. Kaolinite/CMS exfoliated nanocomposite obviously improves its electrorheological activity at direct current electric field. With the component ratio of the nanocomposite closing to 1 : 1, a strong synergetic effect occurs and the optimum electrorheological effect can be attained. Furthermore, we also find that the electrorheological effect is associated with the content of CMS. Keywords kaolinite, carboxymethyl starch, intercalation, exfoliation, electrorheological fluid.

关 键 词：高岭土/羧甲基淀粉 复合颗粒 纳米复合材料 制备 电流变液 二次插层取代法 二甲基亚砜 电流变效应 

分 类 号：TB383[一般工业技术—材料科学与工程]