CAJ | 학술논문

通过调整KH550的含量对Al2 O3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 Al2 O3粉体表面.然后分别使用Al2 O3以及改性Al2 O3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-Al2 O3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/Al2 O3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.
통과조정KH550적함량대Al2 O3분체표면진행개성,병용홍외광보(FT-IR )화 X 사선연사(XRD)대개성후적분체진행표정,표정결과현시KH550성공적건합도 Al2 O3분체표면.연후분별사용Al2 O3이급개성Al2 O3제비료일계렬무궤분체함량위16％(질량분수)적PI복합박막,통과소묘전자현미경(SEM)대복합박막적단면미관형모진행표정,병대복합박막적역학성능화격천장강진행측시.측시결과현시KH550적함량대무궤분체분산정황유교대영향.당 KH550함량위2％(질량분수)시,PI/KH550-Al2 O3복합박막적랍신강도화단렬신장솔최우,분별위130 MPa,12％,여PI/Al2 O3박막상비,랍신강도화단렬신장솔분별제고료22．8％,44．5％,격천장강여기상근.
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.