Al_2O_3对聚酰亚胺纳米复合薄膜性能的影响研究  

Effect of Al_2O_3 on the Properties of Polyimide Nanocomposite Films

作　　者：刘立柱[1,2] 王凤春[1] 杨智 翁凌[1,2] 丁军[1] 崔巍巍[1] 张明艳[1,2] 

机构地区：[1]哈尔滨理工大学材料科学与工程学院,哈尔滨150040 [2]哈尔滨理工大学工程电介质及其应用技术省部共建教育部重点实验室,哈尔滨150040 [3]哈尔滨庆缘电工材料股份有限公司,哈尔滨150040

出　　处：《绝缘材料》2014年第6期50-53,共4页Insulating Materials

基　　金：黑龙江省教育厅科学研究重点项目(12511z007)

摘　　要：采用原位聚合法制备了不同无机含量的聚酰亚胺/氧化铝(PI/Al2O3)纳米复合薄膜。通过扫描电镜(SEM)、X射线衍射仪(XRD)对复合薄膜的形貌及结构进行表征,并对复合薄膜的力学性能、电气强度、耐电晕时间进行测试,分析无机含量对复合薄膜性能的影响。结果表明:纳米Al2O3颗粒均匀地分散于亚胺基体中,无机相与有机相的相容性良好;随着无机含量的增加,复合薄膜的力学性能有所下降,其中拉伸强度变化不大,断裂伸长率下降明显;PI/Al2O3复合薄膜的电气强度随着无机含量的增加呈现先增大后减小的趋势;纳米Al2O3颗粒的加入可以有效提高PI复合薄膜的耐电晕性能。Polyimide/Al2O3（PI/Al2O3） nanocomposite films with different content of nano-Al2O3 inorganicparticles were prepared through in-situ polymerization method. The morphology and structure of the compositefilms were characterized by Scanning Electron Microscope（SEM） and X-ray diffraction（XRD）. Theeffect of nano-Al2O3 content on the properties of the composite films was studied by testing their mechanicalproperties, electric strength, and time of corona-resistance. The results show that the nano-Al2O3 canhomogenously disperse in the polyimide matrix, and the inorganic phase and organic phase have goodcompatibility. With the increase of inorganic particles content, the mechanical properties of the compositefilms decrease, while the tensile strength changes little, and the elongation at break decreases obviously.The electric strength of the composite films first increases and then decreases with the increase of inorganicparticles content. The corona resistance is improved effectively by the addition of nano-Al2O3.

关 键 词：聚酰亚胺 氧化铝 形貌与结构 无机含量 性能 

分 类 号：TM215.3[一般工业技术—材料科学与工程]