不同场强下新型绝缘聚合物的变色特性及其介电特性

doi:10.11930/j.issn.1004-9649.202106016

中国电力 ›› 2021, Vol. 54 ›› Issue (11): 144-152.DOI: 10.11930/j.issn.1004-9649.202106016

不同场强下新型绝缘聚合物的变色特性及其介电特性

聂永杰¹, 景钰², 张萌³, 陈昊鹏³, 赵现平¹, 赵腾飞¹, 项恩新¹, 王科¹, 鲁广昊³, 朱远惟³

1. 云南电网有限责任公司电力科学研究院,云南昆明 650217;
2. 国网陕西省电力公司经济技术研究院,陕西西安 710075;
3. 西安交通大学电力设备和电气绝缘及前沿科学技术研究国家重点实验室,陕西西安 710049

收稿日期:2021-06-16 修回日期:2021-07-21 出版日期:2021-11-05 发布日期:2021-11-16
作者简介:聂永杰(1986-),男,博士后,高级工程师,从事电力设备状态检测,先进电工材料的研发及应用研究,E-mail:nieyongjie@stu.xjtu.edu.cn;朱远惟(1989-),男,通信作者,博士后,助理教授,从事绝缘材料、半导体材料和先进电工材料的研发及其应用研究,E-mail:zhuyuanwei@xjtu.edu.cn
基金资助:
中国南方电网科技项目(YNKJXM20190717)；国家自然科学基金青年基金资助项目(51907148)

Electrochromic and Dielectric Characteristics of Advanced Insulating Polymer under Various Electric Fields

NIE Yongjie¹, JING Yu², ZHANG Meng³, CHEN Haopeng³, ZHAO Xianping¹, ZHAO Tengfei¹, XIANG Enxin¹, WANG Ke¹, LU Guanghao³, ZHU Yuanwei³

1. Electric Power Research Institute, Yunnan Power Gird Co., Ltd., Kunming 650217, China;
2. Economic and Technological Research Institute of State Grid Shaanxi Electric Power Company, Xi'an 710075, China;
3. State Key Laboratory of Electrical Insulation and Power Equipment and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China

Received:2021-06-16 Revised:2021-07-21 Online:2021-11-05 Published:2021-11-16
Supported by:
This work is supported by Science and Technology Project of China Southern Power Grid Co., Ltd.(No.YNKJXM20190717) and the National Natural Science Foundation of China (No.51907148)

摘要/Abstract

摘要： 为了依靠绝缘材料在电场下的颜色变化判断电力设备带电状态，制备了等规/无规聚（3-己基噻吩）（poly(3-hexylthiophene)，P3HT）共混薄膜。研究发现，等规P3HT纳米微晶在共混薄膜顶部均匀分布。随无规P3HT含量的上升，共混薄膜沿厚度方向表现出更好的绝缘性能。在无规P3HT含量为95%时，共混薄膜的工频介电常数为5.86，电阻率为3.2 T Ω·cm，直流击穿场强达到113 kV/mm。通过空间电荷积累光谱发现，当电场强度大于40 kV/mm时，电荷主要积累在绝缘的无规P3HT中，且共混薄膜吸收光谱450 nm处峰强度随电场强度的增加而升高，实现了空间电荷驱动的绝缘体系电致变色，为电力设备绝缘带电状态检测提供了新方法。

关键词: 高电压, 电致变色, 空间电荷, 绝缘, 聚（3-己基噻吩）

Abstract: In order to identify the charged states of power equipment through electrochromism of insulating materials, a regular/irregular poly(3-hexylthiophene) (reg-P3HT/irreg-P3HT) blend film is prepared. The experiment study shows that the reg-P3HT is evenly distributed as nano-scale crystallite morphology on top of the blend film. As the content of irreg-P3HT increases, the blend film shows better insulating performance in the direction of film thickness. When the content of irreg-P3HT reaches 95%, the blend film has a power frequency dielectric constant of 5.86, a volume resistivity of 3.2×10¹² Ω·cm, and a DC breakdown strength of 113 kV/mm. By applying charge accumulation spectroscopy, it is found that when the field strength reaches over 40 kV/mm, the space charges mainly accumulate in irreg-P3HT, and the blend film’s absorption intensity increases with the field strength at 450 nm, triggering the electrochromism of the insulating film. This work provides a new path for testing the charged states of insulating materials of power equipment.

Key words: high voltage, electrochromism, space charge, insulation, poly(3-hexylthiophene)

聂永杰, 景钰, 张萌, 陈昊鹏, 赵现平, 赵腾飞, 项恩新, 王科, 鲁广昊, 朱远惟. 不同场强下新型绝缘聚合物的变色特性及其介电特性[J]. 中国电力, 2021, 54(11): 144-152.

NIE Yongjie, JING Yu, ZHANG Meng, CHEN Haopeng, ZHAO Xianping, ZHAO Tengfei, XIANG Enxin, WANG Ke, LU Guanghao, ZHU Yuanwei. Electrochromic and Dielectric Characteristics of Advanced Insulating Polymer under Various Electric Fields[J]. Electric Power, 2021, 54(11): 144-152.

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不同场强下新型绝缘聚合物的变色特性及其介电特性

Electrochromic and Dielectric Characteristics of Advanced Insulating Polymer under Various Electric Fields

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Electrochromic and Dielectric Characteristics of Advanced Insulating Polymer under Various Electric Fields

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