用橡胶乳液-黏土水悬浮液共凝法制备的橡胶/黏土纳米复合材料的结构及其复合机理

吴友平　 赵蔚　 王益庆　 张立群　

摘　要：研究了利用橡胶乳液-黏土水悬浮液共凝法制备的橡胶/黏土纳米复合材料的结构和复合机理.结果表明,在加入絮凝剂使橡胶乳液-黏土水悬浮液共凝聚的过程中,由于存在胶乳粒子对黏土片层的隔离作用与在混合液中分散的黏土单片层的重新聚集作用的竞争,因此,在絮凝物中,橡胶大分子将黏土片层隔离成纳米分散单元(包括单片层和多片层的聚集体),在多片层的黏土聚集体层间没有橡胶大分子插入.采用该共凝法制备的橡胶/黏土纳米复合材料具有"隔离型"结构.
关键词：橡胶;黏土;纳米复合材料;共凝聚;结构;机理
分类号：TQ330.1+1　文献标识码：B
文章编号：1000-1255(2005)05-0350-06

Structure and compounding mechanism of rubber/clay nanocomposites prepared by cocoagulating rubber latex and clay aqueous suspension

Wu Youping（Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China ）　 Zhao Wei（Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China ）　 Wang Yiqing（Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China ）　 Zhang Liqun（Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China;Key Laboratory for Nanomaterials of Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China ）　

Abstract：Structure and compounding mechanism of rubber/clay nanocomposites prepared by co-coagulating rubber latex and clay aqueous suspension were studied. The results showed that the rubber latex particles separated the clay into nanometer units, accompanied with the competition between separation of rubber latex particles and re-aggregation of single silicate layers upon addition of flocculant during the process of co-coagulating,while the intercalation of rubber molecules into clay galleries did not occur. Consequently, the rubber/clay nanocomposites were demonstrated a separated structure.
Keywords：rubber;clay;nanocomposite;co-coagulating;structure;mechanism

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收稿日期：2004年12月6日

出版日期：2005年9月15日