聚乙烯基纳米沸石复合电介质的制备与介电性能研究

项目名称： 聚乙烯基纳米沸石复合电介质的制备与介电性能研究

项目编号： No.51307037

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 电工技术

项目作者： 韩柏

作者单位： 哈尔滨理工大学

项目金额： 25万元

中文摘要： 目前纳米电介质的研究主要以简单纳米无机氧化物的掺杂为主，相关的性能研究数据有限，且在纳米尺度上的结构与宏观性能间的关联研究还远远不够。本项目选择在普通无机纳米粒子以外，利用具有特殊多孔纳米结构的硅铝酸氧化物-纳米沸石作为掺杂物，以低密度聚乙烯为基体，通过改进材料处理和共混工艺方法，制备出纳米粒子分散均匀的，具有特殊纳米孔洞结构的新型复合电介质材料；利用多种显微和表征方法对微观结构、界面特征、聚合物分子链团构型进行表征和分析，对电场力下电荷的微观分布和运动进行表征，掌握微观结构随掺杂种类和浓度的变化规律；同时对复合材料的多种介电性能进行测试，着重研究电场条件下的空间电荷分布和电导特性，热刺激电流和光激电流测试获得的陷阱分布规律，以及复合材料的击穿老化特性，并建立各介电性能间的关联；结合微观表征的结果，建立纳米沸石复合聚乙烯的微观结构与宏观性能之间的联系，并对相关机理进行分析。

中文关键词： 纳米复合；聚乙烯；沸石；空间电荷；陷阱

英文摘要： At present, the research on nano-dielectric material is mainly focused on nano inorganic oxide doping, and the relevant performance data is insufficient. Furthermore, the study on the relationship between nanoscale structure and macroscopic performance is far from enough. In this project, aluminosilicate oxide with special porous structure - nano zeolite is applied as dopant, different from the common inorganic nanoparticles, and the low-density polyethylene (LDPE) is applied as the basis material, respectively. By improving the material treatments and blending process, the preparation of the new type LDPE/zeolite nanocomposite is achieved, which is with special porous structure and uniformly distributed nanoparticles. The microstructure, interface characteristics, and the molecular chain arrangement of LDPE/zeolite nanocomposite are characterized and analyzed by various microscopy and characterization methods, and the microscopic distribution and movement of charge under electric force microscopy in nanocomposite are characterized. The regularity between the microstructure and the doping species and concentrations will be investigated. Meanwhile, a variety of dielectric properties of LDPE/zeolite nanocomposite are tested, especially the space charge distribution, conduction current under electric field, the tra

英文关键词： nanocomposite；polyethylene；zeolite；space charge；trap