MCM-41表面改性及MCM-41/环氧树脂复合材料陷阱特性  

MCM-41 Surface Modification and Trap Characteristic of MCM-41/EP Composites

作　　者：罗潘[1,2] 徐曼 王绍辉[1,3] 李鹏[2] 张艺涵 徐阳 谢大荣 Luo Pan;Xu Man;Wang Shaohui;Li Peng;Zhang Yihan;Xu Yang;Xie Darong(State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong University Xi’an 710049 China;State Grid Henan Economic Research Institute Zhengzhou 450052 China;Northwest Electric Power Design Institute Co. Ltd China Power Engineering Consulting Group Xi’an 710045 China)

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,西安710049 [2]国网河南省电力公司经济技术研究院,郑州450052 [3]中国电力工程顾问集团西北电力设计院有限公司,西安710075

出　　处：《电工技术学报》2018年第10期2245-2252,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金青年基金资助项目(51207120)

摘　　要：在复合材料MCM-41/环氧树脂的制备中,采用硅烷偶联剂对MCM-41颗粒进行表面改性,同时采用热失重、傅里叶红外光谱、小角X衍射、氮气吸附-脱附等手段对表面修饰前后的MCM-41颗粒表面结构进行表征。随后利用原位聚合的方法制备表面改性后不同MCM-41含量的MCM-41/环氧树脂复合材料。在复合材料性能表征中,首先利用动态热机械分析法对其玻璃化转变温度的变化趋势进行研究,实验结果显示随着MCM-41添加量增加,复合材料玻璃化转变温度呈先增加后降低的变化趋势;其次,采用热刺激去极化电流对复合材料中内部的陷阱分布变化进行研究,结果显示随着MCM-41的添加,复合材料内部陷阱深度变浅,陷阱电荷总量降低。实验结果说明在偶联剂的作用下MCM-41能够与环氧树脂基体形成有效的化学键连接,提高复合材料的动态热机械特性,减少复合材料内部的物理或者化学缺陷。In this paper, the MCM-41 was surface modified by the silane coupling agent KH550 before the preparation of MCM-41/EP nano-composite. Moreover, the thermogravimetric analysis, Fourier transform infrared spectroscopy, small angle X-ray diffraction and N2 adsorption-desorption isotherms were used to characterize the surface structure of MCM-41 before and after surface modification. The in-situ polymerization was employed to prepare the MCM-41/EP Nano-composite with different percentages of MCM-41. Then, the glass transition temperature of MCM-41/EP composite was measured by using the dynamic mechanical analyzer. The results showed that the glass transition temperature of MCM-41/EP composite increased with the increase of MCM-41 percentage. Finally, the trap parameter of the composite was measured by the thermally stimulated depolarization current. It was shown that, with the increase of MCM-41, the trap depth became shallow, and the quantity of trapped charge decreased significantly.

关 键 词：MCM-41 表面改性 MCM-41/环氧树脂 玻璃化转变温度 陷阱特性 

分 类 号：TM215.1[一般工业技术—材料科学与工程]