改性BaTiO_3/PVDF复合薄膜的制备及介电性能  

Preparation and Dielectric Properties of Modified BaTiO_3/PVDF Composite Films

作　　者：黄鸿[1] 杨传仁[1] 魏猛[1] 陈宏伟[1] 陈书涛 张继华[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,四川成都610054 [2]索尔维集团-苏威(上海)有限公司,上海201100

出　　处：《压电与声光》2015年第3期500-503,共4页Piezoelectrics & Acoustooptics

摘　　要：对陶瓷颗粒表面进行改性是提高陶瓷/聚合物复合材料介电性能的重要途径。该文先后使用H2O2和硅烷偶联剂KH550对BaTiO3(BT)陶瓷颗粒表面进行了两次处理,采用简单的溶液共混及流延工艺制备了改性钛酸钡/聚偏氟乙烯(M-BT/PVDF)薄膜。结果表明,用H2O2和硅烷偶联剂KH550对BT颗粒表面进行改性能有效地改善BT与PVDF基质的界面结合,从而提高体系的介电常数。当掺入60%(体积分数)的BT时,复合薄膜介电常数提高到36(为纯PVDF的6倍),介电损耗为5%。Surface modification of ceramic particles is an important way to improve the dielectric properties of ce- ramic/polymer composites . In this work, H2O2 and silane coupling agent KH550 were used to modify the surface of BaTiO3 （BT） ceramic particles twice. Modified BaTiO3/PVDF（M-BT/PVDF） films were prepared by a simple solution blending and casting process. The results show that the use of H2O2 and silane coupling agent KH550 can enhance the interface bonding of BT and PVDF effectively, and thus improve the dielectric constant of the composites. The dielectric constant of the composites reaches to 36 when the volume fraction of BT is 60%, which is six times of pristine PVDF matrix, and the dielectric loss is 5%.

关 键 词：BATIO3 聚偏氟乙烯 介电性能 复合薄膜 改性 

分 类 号：TB332[一般工业技术—材料科学与工程]