NDLI: Choices of Droplet size and measuring time on measuring hydrophobic angle of HTV silicone rubber

Content Provider	IEEE Xplore Digital Library
Author	Maohuan Fang Zhidong Jia Zhong Wang Zhicheng Guan
Copyright Year	2015
Description	Author affiliation: Dept. of Electr. Eng. & Appl. Electron. Technol., Tsinghua Univ., Shenzhen, China (Maohuan Fang; Zhidong Jia; Zhong Wang; Zhicheng Guan)
Abstract	Hydrophobicity can reflect the operating and ageing characteristics of silicone rubber material of composite insulator. Static contact angle method can be used to judge hydrophobicity by measuring hydrophobic angle, but it is still lack of deep research on the choice of droplet size and the moment for measuring the angle's value. In this paper's study, several HTV specimens are taken as samples whose hydrophobicity are different. The titration tests are conducted on the samples' surfaces and the values of the hydrophobic angle are observed and recorded for minutes. The experimental results indicate that on the surface of worse hydrophobic sample, the value of the contact angle declines quicker and greater during the initial 30s. The droplet on the different surfaces can keep relatively steady form after different time but worse hydrophobicity makes the time of reaching this steady form longer. So the relatively proper time for measuring the hydrophobic angle should be prolonged to after about 60s to increase accuracy. Furthermore, only certain droplet size range is suitable for measuring use for the reason of reducing the error. As hydrophobicity becomes worse, the suitable droplet size range becomes narrower. Relative reasons, e.g., surface roughness, are discussed and analyzed. The regularity of the forms of droplets on the specimens' surfaces can be summarized in one figure. These results and conclusions can help standardize the methods of measuring the hydrophobic angle, which could better reflect the insulators' performance.
Starting Page	1027
Ending Page	1030
File Size	815800
Page Count	4
File Format	PDF
ISSN	21609241
e-ISBN	9781479989034
DOI	10.1109/ICPADM.2015.7295450
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-07-19
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rough surfaces Surface roughness Pollution measurement Time measurement Size measurement Contamination Aging surface roughness composite insulator hydrophobicity measurement HTV static contact angle droplet size measuring time
Content Type	Text
Resource Type	Article

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