绿藻对交流复合绝缘子伞裙表面形貌及憎水性的影响机理

doi:10.19595/j.cnki.1000-6753.tces.180114

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摘要藻类在绝缘子上附生引起国内外专家学者越来越广泛的关注,藻类作为一种特殊的生物污秽对复合绝缘子性能的影响尚不明确。本文以广东地区伞裙附生绿藻的500kV交流复合绝缘子为样品,分析了绿藻在复合绝缘子上的分布规律。通过静态接触角、EPMA电子探针和扫描电镜测试,研究了绿藻对硅橡胶伞裙表面形貌及憎水性的影响机理。结果表明,绿藻生物层对憎水性小分子迁移的阻碍作用导致绿藻附生的伞裙区域憎水性完全丧失。绿藻细胞的粘附行为与硅橡胶自然老化协同作用使伞裙表面形成特殊的鳞片状结构。绿藻附着层可延缓伞裙表面裂缝和凹陷往纵深发展。

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	谢从珍
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	夏云峰

关键词 ：复合绝缘子, 绿藻, 憎水性, 微观形貌, 生物粘附

Abstract：Algal epiphytes on insulators have attracted much attention from experts and scholars both at home and abroad. The effect of algae as a special biological fouling on the performance of composite insulators is not clear. In this paper, 500kV AC composite insulators attached to green algae in Guangdong area are taken as samples. The distribution of green algae on composite insulators was analyzed. Hydrophobic contact angle measurement, EPMA electron probe and scanning electron microscopy (SEM) were used to analyze the effect of green algae on the surface of silicone rubber sheds. The inhibition of the migration of hydrophobicity small molecules by the green algae biological layer leads to the complete loss of hydrophobicity in the epiphytic sheds area of green algae. The interaction between the adhesion behavior of green algae cells and the natural aging of silicone rubber makes the sheds surface sheds form a special block microstructure like scale. The green algae adhesion layer can effectively delay the development of cracks and depressions on the sheds surface in depth.

Key words： Composite insulator green algae hydrophobic micromorphology biological adhesion

收稿日期: 2018-01-21 出版日期: 2019-03-01

PACS:

TM216

作者简介: 李超红,男,1991年生,硕士研究生,研究方向为输变电设备外绝缘、绝缘材料。E-mail: 1006879402@qq.com

引用本文:

谢从珍, 李超红, 曾磊磊, 杨挺, 夏云峰. 绿藻对交流复合绝缘子伞裙表面形貌及憎水性的影响机理[J]. 电工技术学报, 2019, 34(4): 831-837. Xie Congzhen, Li Chaohong, Zeng Leilei, Yang Ting, Xia Yunfeng. Effect Mechanism of Green Algae on Surface Morphology and Hydrophobicity of AC Composite Insulator Sheds. Transactions of China Electrotechnical Society, 2019, 34(4): 831-837.

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21 通信作者:谢从珍,女,1973年生,博士,教授,研究方向为输变电设备绝缘材料及缺陷诊断、输变电设备在线监测及大数据.E-mail: congzhen168@163.com