聚酰亚胺/纳米Al_2O_3薄膜的制备及耐老化性能研究  

Study on Aging-Resistant of Polyimide/Nano-Al_2O_3 Composite Films and Its Preparation

作　　者：林在山[1] 殷景华[1] 吴世辰 

机构地区：[1]哈尔滨理工大学,黑龙江哈尔滨154000

出　　处：《塑料科技》2016年第2期37-40,共4页Plastics Science and Technology

基　　金：国家自然科学基金(51077028);黑龙江省自然科学基金(A201006)

摘　　要：为提高聚酰亚胺薄膜的击穿场强和耐电晕性能,分别采用气相纳米Al_2O_3颗粒、非气相纳米Al_2O_3颗粒制备了聚酰亚胺杂化薄膜。通过热激电流(TSC)、耐电晕性能、击穿场强等测试,分别评价了薄膜的陷阱能级、陷阱密度分布趋势、耐电晕性能和击穿场强,并用扫描电子显微镜对薄膜断面进行形貌分析。结果表明:纯聚酰亚胺、非气相纳米Al_2O_3杂化聚酰亚胺薄膜、气相纳米Al_2O_3杂化聚酰亚胺薄膜电荷陷阱密度依次上升,同时陷阱能级有降低的趋势;与纯聚酰亚胺薄膜相比,气相纳米Al_2O_3的掺杂使薄膜的击穿场强由170 k V/mm提高至241 k V/mm;与非气相Al_2O_3杂化的薄膜相比,气相纳米Al_2O_3的掺杂使薄膜的耐电晕时间由24.25 h提高至43.45 h,同时气相纳米颗粒更不容易发生团聚,提高了纳米颗粒的分散性。气相纳米Al_2O_3颗粒的掺杂使聚酰亚胺引入了更多的界面态及缺陷,使其陷阱密度提高,有效提升了聚酰亚胺薄膜的耐电晕性能及击穿场强。In order to improve breakdown field strength and corona resistance performance of polyimide film, gas phase Al2O3 particles were and non-gaseous phase Al2O3 particles were used respectively to prepare polyimide hybrid films. By thermally stimulated currents（TSC）, corona resistance and breakdown field strength tests, respectively evaluated trap energy level, trap density distribution trend, corona resistance, breakdown field strength of the films, and morphology analysis on the film section was carried out by using scanning electron microscope. The results show that the trap densities of pure polyimide, non-gas phase nanometer Al2O3 polyimide hybrid film and gas phase of nanometer Al2O3 polyimide hybrid film are rising in turn, and the trap energy level has a tendency to reduce. Compared with the pure polyimide film, the adulteration of gas phase nano Al2O3 makes breakdown field strength increase from 170 k V/mm to 241 k V/mm; Compared with non-gas phase nanometer Al2O3 hybrid film, the adulteration of gasous phase nanometer Al2O3 makes corona resistant time increase from 24.25 h to 43.45 h. Meanwhile, gas phase nano-particles are not likely to cluster and improve dispersibility of nanoparticles. The doping of the gas phase nano Al2O3 particles causes the polyimide to introduce more interface states and defects, so that the trap density is improved, and the corona resistance and breakdown field strength of polyimide film can be improved effectively.

关 键 词：聚酰亚胺 热激电流 Al2O3 耐电晕 击穿场强 电荷陷阱 

分 类 号：TQ323.7[化学工程—合成树脂塑料工业]