环氧树脂/蒙脱土纳米复合材料的制备与性能表征  

Preparation and Characterization of Epoxy/Montmorillonite Nanocomposites

作　　者：金国呈[1] 姚俊琦[1] 施庆锋[1] 贺文潇[1] 徐世爱[1] 吴驰飞[1] 

机构地区：[1]华东理工大学材料科学与工程学院超细材料制备与应用教育部重点实验室,上海200237

出　　处：《华东理工大学学报（自然科学版）》2006年第12期1422-1426,共5页Journal of East China University of Science and Technology

基　　金：上海市自然科学基金(02ZE14023);教育部留学回国人员科研启动基金资助项目

摘　　要：以4,4′-二氨基二苯基甲烷(DDM)为固化剂,通过插层法制备了环氧树脂/有机蒙脱土纳米复合材料。根据样品在丙酮中的溶胀度,确定了纳米复合材料的最佳制备条件,在此条件下,制备了一系列蒙脱土含量不同的纳米复合材料。用X射线衍射(XRD)表征了蒙脱土在基体中的分散状态,测定了纳米复合材料的氧气透过系数,并研究了纳米复合材料的动态力学性能。结果表明:当蒙脱土的含量较低时,可以形成剥离型纳米复合材料;环氧树脂与蒙脱土复合后,阻隔性能大幅提高;蒙脱土的加入使纳米复合材料的储能模量和玻璃化转变温度明显提高。The epoxy/montmorillonite nanocomposites were prepared through intercalation using 4,4＇- diaminodiphenylmethane （DDM） as hardener. The montmorillonite used was modified by ionic exchange reaction. The optimum conditions for preparing the nanocomposites were determined according to the swelling degree change of samples in acetone. The dispersion of the organic montmorillonite （OMMT） in the matrix was characterized by X-ray diffraction （XRD）. The oxygen permeability of the nanocomposites was measured. Furthermore, effect of the OMMT content on dynamic mechanical properties of the nanocomposites was studied. The results show that the OMMT nano-layers can be completely exfoliated and disperse homogenously in the matrix when the OMMT content is low. The nanocomposite exhibits excellent barrier properties against oxygen after addition of OMMT into the epoxy. The glass transition temperatures and storage modulus of the nanocomposites are obviously increased after addition of OMMT.

关 键 词：环氧树脂 有机蒙脱土 透氧性 溶胀度 阻隔性能 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]