以聚酰亚胺(PI)为基体,将聚酰亚胺与钛酸钡(BaTiO3)纳米粒子进行复合,采用原位聚合法制备BaTiO3/PI复合薄膜.为提高 BaTiO3纳米粒子的分散性和表面性能,采用 SiO2对 BaTiO3纳米粒子进行表面包覆改性,并制备改性 BaTiO3/PI 复合薄膜.采用红外光谱、X射线衍射、扫描电镜等对制备得到的改性BaTiO3进行了表征,测试了复合薄膜的介电性能.结果发现,SiO2与BaTiO3粒子间仅是物理包覆,没有新物质形成.测试频率为103 Hz 时,质量分数为5％的SiO2包覆改性使复合薄膜的介电常数增大到21．8,介电损耗为0．00521,击穿强度为76 MV/m,储能密度为0．56 J/cm3.研究表明,采用 SiO2对 BaTiO3改性使得复合薄膜的介电性能有所提高.
Polyimide (PI)was chosen as the matrix of the composite,barium titanate/polyimide (BaTiO3/PI) nanocomposite films were prepared with in situ polymerization.In order to improve the dispersion and the phys-ical-chemical properties of BT surface,barium titanate was modified by SiO2 coating and modified barium titan-ate/polyimide (BaTiO3/PI)nanocomposite films were prepared.The prepared modified BaTiO3 was character-ized by X-ray diffraction (XRD)analysis,Fourier transform infrared spectroscopy (FT-IR)and scanning elec-tron microscopy (SEM),and the dielectric properties of the composites were characterized in detail.It was shown that surface modification with SiO2 was the physical effect and there were no new substances forming. When BaTiO3 was modified by 5% SiO2 ,the dielectric constant of the composite film was 21.8 (103 Hz),the loss tangent 0.00521,breakdown strength 76 MV/m,energy storage density 0.56 J/cm3 .The BaTiO3 surface coating modification by SiO2 was beneficial to the dielectric properties of the BaTiO3/PI composite film.
参考文献
| [1] | Zhi-Min Dang;Jin-Kai Yuan;Jun-Wei Zha;Tao Zhou;Sheng-Tao Li;Guo-Hua Hu .Fundamentals, processes and applications of high-permittivity polymer-matrix composites[J].Progress in materials science,2012(4):660-723. |
| [2] | 王亚军,武晓娟,曾庆轩.高储能密度钛酸钡基复合材料[J].科技导报,2012(10):65-71. |
| [3] | Sinha Dolly;Pillai P K C .Ceramic-polymer composites as potential capacitor material[J].Journal of Materials Sci-ence Letters,1989,8(06):673-678. |
| [4] | 张亮,肖定全.高性能钛酸钡/聚合物复合材料的研究进展[J].功能材料,2012(10):1225-1229. |
| [5] | 崔爱莉,陈仁政,尉京志,李龙土.超细钛酸钡的表面改性[J].高等学校化学学报,2001(12):2065-2067. |
| [6] | 余燕飞,党智敏,徐海萍.钛酸钡/环氧树脂复合材料的制备及其介电性能的研究[J].功能材料,2007(09):1478-1480,1486. |
| [7] | Masa-aki Kakimoto;Akio Takahashi;Taka-aki Tsurumi;Jianjun Hao;Li Li;Ryohei Kikuchi;Takao Miwa;Toshiyuki Oono;Shinji Yamada .Polymer-ceramic nanocomposites based on new concepts for embedded capacitor[J].Materials Science & Engineering, B. Solid-State Materials for Advanced Technology,2006(1/2):74-78. |
| [8] | Naga Gopi Devaraju;Eung Soo Kim;Burtrand I Lee .The synthesis and dielectric study of BaTiO_3/polyimide nanocomposite films[J].Microelectronic engineering,2005(1):71-83. |
| [9] | Wang Y;Wu X .Preparation of barium titanate/polyimide composite film and its dielectric properties[J].Advanced Materials Research,2013,815:93-98. |
| [10] | Luo Yang;Wu Guangning;Peng Jia et al.Research progress on interface properties of polymer nanodielec-tric[J].High Voltage Engineering,2012,38(09):2455-2464. |
| [11] | 田付强,杨春,何丽娟,韩柏,王毅,雷清泉.聚合物/无机纳米复合电介质介电性能及其机理最新研究进展[J].电工技术学报,2011(03):1-12. |
| [12] | Zhang Lide;Mou Jimei.Nanomaterial and nanostructure[M].Beijing:SciencePress,2001 |
| [13] | 刘波,庄志强,刘勇,王悦辉.粉体的表面修饰与表面包覆方法的研究[J].中国陶瓷工业,2004(01):50-54,31. |
| [14] | Voltzke D;Gablenz S;Abicht H et al.Surface modifi-cation of barium titanate powder particles[J].Materials Chemistry and Physics,1999,61(02):110-116. |
| [15] | 郭炜,李玲霞,吴霞宛,张志萍,王洪儒.掺杂Nb2O5及MgO对细晶BaTiO3系统介电性能影响的研究[J].硅酸盐通报,2003(01):22-25. |
| [16] | 陈缘,杜高翔,高华,翁传欣.包覆型Fe2O3/SiO2复合颜料的制备及其性能[J].硅酸盐学报,2014(03):384-389. |
| [17] | St?ber W;Fink A;Bohn E .Controlled growth of mono-disperse silica spheres in the micron size range[J].Jour-nal of Colloid and Interface Science,1968,26:62-69. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%