耐高温聚酰亚胺/纳米复合薄膜的合成及其电性能研究  

Study on Synthesis and Dielectric Properties of Polyimide Nano-alumina Composite Films

作　　者：严伟兴[1] 邹敏[1] 张飞[1] 李晓奋[1] 胡大宁[1] 

机构地区：[1]西安长峰机电研究所,西安710065

出　　处：《航天制造技术》2014年第1期45-46,52,共3页Aerospace Manufacturing Technology

摘　　要：制备均苯型聚酰亚胺/纳米三氧化二铝复合薄膜，通过超声机械共混法对纳米颗粒进行物理分散，使用扫描电镜（SEM）、红外光谱（FT-IR）分别对复合材料表面微观形貌和结构进行了表征与研究，通过介电谱测试系统对PI复合材料进行电性能方面的分析研究。结果发现：纳米颗粒分散均匀，超声波对纳米颗粒有很好的分散效果；频率在102～105Hz之间， PI复合薄膜介电常数和介电损耗角正切随纳米Al2O3含量质量分数的增加而增大。Polypyromellitimide/nano-alumina composite films were prepared. Nano-particles were dispersed by ultrasonic-mechanical mixing method. The surface morphology and structure of PI composite film were examined and characterized by SEM and FTIR spectrometer, and the electrical properties were researched by use of dielectric spectroscopy test system. The results showed that dielectric constant and the dielectric loss of composite film improve when the content of nano-alumina was increasing between 102~105Hz.

关 键 词：聚酰亚胺薄膜 纳米三氧化二铝 超声机械共混 电学性能 

分 类 号：TB383.2[一般工业技术—材料科学与工程]