聚酰亚胺/二氧化钛纳米复合薄膜制备与耐电晕性

doi:10.3724/SP.J.1077.2014.12749

无机材料学报 ›› 2014, Vol. 29 ›› Issue (1): 98-102.DOI: 10.3724/SP.J.1077.2014.12749 CSTR: 32189.14.SP.J.1077.2014.12749

聚酰亚胺/二氧化钛纳米复合薄膜制备与耐电晕性

孔宇楠¹, 殷景华^{1, 2}, 铁雯鹭¹, 刘晓旭¹, 宋明歆¹, 雷清泉²

(哈尔滨理工大学1. 应用科学学院; 2. 工程电介质及其应用教育部重点实验室, 哈尔滨150080)

收稿日期:2012-12-11 修回日期:2013-03-05 出版日期:2014-01-20 网络出版日期:2013-12-09
作者简介:孔宇楠(1987–), 男, 硕士研究生. E-mail: kyn10000@163.com
基金资助:
国家自然科学基金(51077028); 黑龙江省自然科学基金(A201006); 黑龙江省青年科学基金(QC2011C106)

Preparation and Corona Resistant of Polyimide/TiO₂ Nanocomposite Films

KONG Yu-Nan¹, YIN Jing-Hua^{1, 2}, TIE Wen-Lu¹, LIU Xiao-Xu¹, SONG Ming-Xin¹, LEI Qing-Quan²

(1. School of Applied Science, Harbin University of Science and Technology, Harbin 150080, China; 2. Key Laboratory of Engineering Dielectric and its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China)

Received:2012-12-11 Revised:2013-03-05 Published:2014-01-20 Online:2013-12-09
About author:KONG Yu-Nan. E-mail: kyn10000@163.com
Supported by:
National Natural Science Foundation of China (51077028); National Natural Science Foundation of Heilongjiang Province of China (A201006); NSF of Heilongjiang Province of China (QC2011C106)

摘要/Abstract

摘要： 采用原位聚合法制备不同TiO₂组分聚酰亚胺(PI)/纳米TiO₂复合薄膜, 薄膜厚度50 μm。测试结果表明, TiO₂呈球状颗粒, 直径约为100 nm, 聚酰亚胺呈片状, 尺寸约为2 μm ×1 μm。随着TiO₂含量的增加, 复合薄膜介电常数和介电损耗增大, 击穿场强先增加后降低; 在40 kV/mm电场强度下, 复合薄膜耐电晕老化寿命增加, 纯PI薄膜寿命为3 h, 20wt%TiO₂含量薄膜寿命达到25 h; TiO₂颗粒耐电晕能力强, 与聚合物形成界面相, 改变材料陷阱能级, 有利于空间电荷的扩散和热量的传输, 在薄膜表面形成放电阻挡层, 降低局部放电对薄膜内部的侵蚀, 显著提高薄膜耐电晕老化寿命。

关键词: 聚酰亚胺, TiO₂, 复合薄膜, 制备, 耐电晕

Abstract: The polyimide (PI)/TiO₂ composite films with different component were prepared by in-situ dispersion polymerization. Thickness of the obtained films is about 50 μm. The characterization results show that diameter of spherical TiO₂ in the films is about 100 nm and the size of the lamellar polyimide is about 2 μm ×1 μm. With the increase of the TiO₂ content, electrical breakdown strength increases firstly and then decreases, while the values of permittivity, dielectric loss, corona resistant lifetime increase. Under the electric field of 40 kV/mm, corona resistant lifetime of pure PI is about 3 h, while the lifetime of composite film with 20wt% TiO₂ is about 25 h. TiO₂has a high performance in corona resistance forming interphase with polymer and changing the trapping levels of material, facilitating diffusion of space charge and transmission of heat in material. A large of TiO₂ particles can form discharge blocking layer on the surface of films and reduce internal erosion by partial discharge. Therefore, the corona resistant ability of nanocomposite films is significantly improved.

Key words: polyimide, TiO₂, composite film, preparation, corona resistant

中图分类号:

TM215
TQ323

孔宇楠, 殷景华, 铁雯鹭, 刘晓旭, 宋明歆, 雷清泉. 聚酰亚胺/二氧化钛纳米复合薄膜制备与耐电晕性[J]. 无机材料学报, 2014, 29(1): 98-102.

KONG Yu-Nan, YIN Jing-Hua, TIE Wen-Lu, LIU Xiao-Xu, SONG Ming-Xin, LEI Qing-Quan. Preparation and Corona Resistant of Polyimide/TiO₂ Nanocomposite Films[J]. Journal of Inorganic Materials, 2014, 29(1): 98-102.

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聚酰亚胺/二氧化钛纳米复合薄膜制备与耐电晕性

Preparation and Corona Resistant of Polyimide/TiO₂ Nanocomposite Films

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聚酰亚胺/二氧化钛纳米复合薄膜制备与耐电晕性

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