中国电机工程学报Issue(22)：142-147,6.
聚酰亚胺/TiO2纳米杂化薄膜耐电晕性能的研究
Study on Corona-resistance of the Polyimide/Nano-TiO2 Hybrid Films
摘要
Abstract
Polyimide/nano-TiO2 (PI/TiO2) hybrid films were fabricated via in-situ dispersive polymerization and corona-resistance of films was studied. The trap state and ultraviolet absorption spectra of the films were measured by photon-stimulated discharge (PSD) and ultraviolet spectrophotometer. The surface morphology and fractal characteristics of the films were also analyzed by SEM and small angle X-ray scattering (SAXS). The results show that the trap density and mass fractal dimensions of hybrid films increase as TiO2 is filled into PI. Meanwhile, surface fractal appears at 5% doping. The variation of fractal characteristics proves hybrid films with more compact and complex structure. With the TiO2 doping concentration increasing, the time-to-breakdown of the hybrid films can be lengthened from 3.9h (0%) to 49h (7%), and ultraviolet absorptive capacity is improved. With the corona ageing continuing, PI matrix on the surface of films decomposes. Then, a large number of TiO2 particles are gradually accumulated and play a role in shielding further erosion. The corona-resistance of hybrid films is enhanced by synergistic effects which are composed of trap state in the interface, TiO2 particles properties and film fractal characteristics.关键词
纳米二氧化钛/聚酰亚胺/耐电晕/组分/杂化Key words
nano-TiO2/polyimide/corona-resistance/concentration/hybrid分类
信息技术与安全科学引用本文复制引用
冯宇,殷景华,陈明华,刘晓旭,雷清泉..聚酰亚胺/TiO2纳米杂化薄膜耐电晕性能的研究[J].中国电机工程学报,2013,(22):142-147,6.基金项目
国家自然科学基金项目(51077028)；黑龙江省自然科学基金项目(A201006)；黑龙江省青年科学基金项目(QC2011C106)。@@@@Project Supported by the National Natural Science Foundation of China (51077028) （51077028）
NSF of Heilongjiang Province of China (A201006) （A201006）
The Youth Science Foundation of Heilongjiang Province of China (QC2011C106) （QC2011C106）
