摘要
通过调整KH550的含量对Al2O3粉体表面进行改性,并用红外光谱(FT-IR)和X射线衍射(XRD)对改性后的粉体进行表征,表征结果显示KH550成功的键合到Al2O3粉体表面。然后分别使用Al2O3以及改性Al2O3制备了一系列无机粉体含量为16%(质量分数)的PI复合薄膜,通过扫描电子显微镜(SEM)对复合薄膜的断面微观形貌进行表征,并对复合薄膜的力学性能和击穿场强进行测试。测试结果显示KH550的含量对无机粉体分散情况有较大影响。当KH550含量为2%(质量分数)时,PI/KH550-Al2O3复合薄膜的拉伸强度和断裂伸长率最优,分别为130 MPa,12%,与PI/Al2O3薄膜相比,拉伸强度和断裂伸长率分别提高了22.8%,44.5%,击穿场强与其相近。
In this paper,the surface of Al2 O3 was modified with the different content ofγ-aminopropyltriethoxyl silane.The obtained modified Al2 O3 particles were characterized by spectroscopy(FT-IR)and X-ray diffraction (XRD).Results showed that KH550 was attached on the surface of Al2 O3 particles successfully.And the Al2 O3 particles and KH550-modified Al2 O3 particles were added to the PI matrix,respectively,PI composite films with 16wt% of Al2 O3 content were prepared with in-situ polymerization.The cross-section microstructure of the obtained composite films was characterized with scanning electron microscope (SEM).Results indicated that different contents of KH550 have a great influence on the dispersion of inorganic particles.In addition,the me-chanical properties and breakdown field strength of the composite films were tested.Test results showed that when the content of KH550 was 2wt%,the tensile strength and elongation at break of PI/KH550-Al2 O3 com-posite films were optimal and were 130 MPa,12% respectively.Compared with the PI/Al2 O3 films,the tensile strength and elongation at break of PI/KH550-Al2 O3 composite films were increased by 22.8% and 44.5%,re-spectively.And the breakdown field strength of that was similar to PI/Al2 O3 films.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2014年第23期23126-23130,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51177030
50137010)
国家重点基础研究发展计划(973计划)资助项目(2012CB723308)
黑龙江省自然科学重点基金资助项目(ZD201004)
黑龙江省电介质工程重点实验室前沿预研资助项目(103509)
黑龙江省教育厅科学研究重点资助项目(12511z007)
