Abstract：In recent years, polyolefin composite insulators have played a very significant role in the prevention and control of bird damage, but the hydrophobicity of polyolefin materials has been rarely studied. In this paper, the hydrophobic character of polyolefin material and silicone rubber was evaluated by the static contact angle and spray method. The hydrophobicity nominal, reduction and recovery property of the two materials were comparability studied according to the static contact angle (θs) and hydrophobicity class. And the hydrophobicity of the two materials in three characteristic stages was analyzed by the microstructure and surface roughness. Further, the hydrophobicity transfer property of polyolefin materials which were contaminated with an artificial pollution slurry and a dry diatomite had been studied. The results show that nonpolar polyolefin material has good hydrophobicity. Due to the small surface roughness, the static contact angle of polyolefin materials is lower, but is still above the minimum required values as per China national standard GB/T 19519—2014. The continuous and uniform pollution layer can not be formed on the surface of the polyolefin material by conventional pasting method. However, with the increasing of transfer time, the static contact angle of polyolefin material which is covered with dry diatomite increases continuously, and the variation of the static contact angle is tending towards stability after transfer for 78h. It is clear from the results that the polyolefin material has hydrophobicity transfer property to dry diatomite.
彭静, 刘云蔚, 危鹏, 刘志强, 张长征. 硬质复合绝缘子用伞套材料憎水性研究[J]. 电工技术学报, 2021, 36(zk1): 14-21.
Peng Jing, Liu Yunwei, Wei Peng, Liu Zhiqiang, Zhang Changzheng. Research on Hydrophobicity of Polyolefin Materials for the Hard Shed of Composite Insulators. Transactions of China Electrotechnical Society, 2021, 36(zk1): 14-21.
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2021, Vol. 36 
