PVDF/TiO_2纳米复合薄膜的电学性能研究  

The study on electrical properties of the PVDF/TiO_2 nano-composite film

作　　者：安宁丽[1] 方长青[1] 

机构地区：[1]西安理工大学印刷包装工程学院,陕西西安710048

出　　处：《西安理工大学学报》2014年第3期288-292,共5页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(51305347);高等学校博士学科点专项科研基金(新教师类)资助项目(20136118120003);陕西省自然科学基础研究计划基金资助项目(青年)(2014JQ7230)

摘　　要：利用Bruggenman介质模型和多壳模型定量分析了球形TiO2纳米颗粒在PVDF聚合物中分布的体积分数与颗粒尺寸对复合薄膜电学特性的影响规律。分析结果表明,TiO2纳米颗粒体积分数为5%时即可获得较好的分布参数。通过宽带介电谱测试实验对PVDF/TiO2纳米复合材料的电学性能进行了表征。根据该电学性能分析结果,探讨了纳米颗粒与聚合物之间的界面效应对PVDF/TiO2纳米复合材料的电学性能的影响。实验结果表明,TiO2的添加提高了材料的极化能力,使材料获得了较大的介电常数,同时降低了介电损耗,对材料的阻抗影响不大,减小了材料的漏电流。The Bruggenman model and muti-shell model are used quantitativly to analyze the effect of volume fraction upon Nano TiO2 particles distribution in polymer and the size of particles on the electrical characteristics law of the composite film. The results show that a better distribution parameters are obtained when TiO2 nanoparticles volume ratio is 5%. The electrical properties of the PVDF/TiO2 nano-composite film are characterized by broadband dielectric spectrum. According to the rusults of the electrical properties, the interfaet effect of the polymer and nanoparticles on the electrical properties of the PVDF/ TiO2 nano-composite film are discussed. Experimental results show that TiO2 is added to improve the ability of the material polarization, so as to make the material obtain a larger dielectric constant, while dielectric loss is reduced and that there is no effect upon impedance of the material and the leakage current is reduced.

关 键 词：PVDF/TiO2 纳米复合薄膜 电学性能 

分 类 号：TB34[一般工业技术—材料科学与工程]