PI/Al_2O_3/SiO_2杂化薄膜的力学及电学性能  

Mechanical and Electrical Properties of PI/Al_2O_3/SiO_2 Composite Films

作　　者：陈高汝 林家齐[1,2] 李东平[3] 冯峰[3] 杨文龙[1] 

机构地区：[1]哈尔滨理工大学应用科学学院,黑龙江哈尔滨150080 [2]工程电介质及其应用教育部重点实验室,黑龙江哈尔滨150080 [3]哈尔滨理工大学化学与环境工程学院,黑龙江哈尔滨150040

出　　处：《哈尔滨理工大学学报》2015年第2期105-108,共4页Journal of Harbin University of Science and Technology

基　　金：黑龙江省自然科学基金(E201258)

摘　　要：采用原位聚合法制备掺杂无机粒子质量分数从1%~5%的PI/Si O2/Al2O3纳米杂化薄膜.通过SEM发现无机纳米Al2O3和纳米Si O2颗粒在聚酰亚胺基体中有很好的相容性和分散性,其颗粒尺寸大约在100 nm左右.采用万能试验机和宽频介电谱分析仪研究不同浓度Al2O3和Si O2的掺杂对PI薄膜的力学性能和电学性能的影响.当质量分数为3%的时候,杂化薄膜力学性能最佳,具有最大的拉伸强度（36.143MPa）和断裂伸长率（10.88%）.并且在100Hz下它相比于其它含量的杂化薄膜,具有最小的介电常数（6.76）、介电损耗（0.01）和电导率（3.94×10-12S·m-1）.The PI/SiOJA1203 nanoparticles hybrid films with mass fraction rang from 1% to 5% had been synthesized using the situ polymerization preparation method. Through scanning electron microscope （SEM） testing means, it was found that the inorganic A1203 nanoparticles and SiO2 nanoparticles have good compatibility and dis- persion in the polyimide matrix, and the size of Al203 nanoparticles and SiO2nanoparticles are about 100 nm. The effects of different doping concentrations on the mechanical and electrical properties of PI film were researched by universal testing machine and broadband dielectric spectroscopy analyzer. When the doping mass fraction was 3%, the mechanical property of the hybrid film is optimal, and has a maximum tensile strength （36. 143MPa） and breaking elongation （10. 88% ）. Besides, compared with the other content, the hybrid film with 3% mass fraction has minimum dielectric constant （6. 76）, dielectric loss （0. 01 ） and conductivity （3.94 x l0-12 S · m-1 ） at 100 Hz.

关 键 词：聚酰亚胺 纳米二氧化硅 纳米氧化铝 力学性能 电学性能 

分 类 号：TM215.3[一般工业技术—材料科学与工程]