Modification of PMMA surface hydrophobic properties using an atmospheric-pressure plasma jet array for the enhancement of flashover voltage

The surface insulation performance of insulating materials is crucial for the electrical equipment safe operation and power system stable operation. The improvement of the surface hydrophobicity of insulating materials is important to improve surface flashover voltage. In this paper, an Ar/hexamethy...

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Bibliographic Details
Published in:The European physical journal. D, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2022, Vol.76 (5), Article 93
Main Authors: Shi, Xunyan, Xu, Jingang, Zhu, Xi, Liu, Feng, Fang, Zhi
Format: Article
Language:English
Subjects:
Applications of Nonlinear Dynamics and Chaos Theory
Arrays
Atomic
Atomic force microscopy
Contact angle
Electric contacts
Electric equipment
Electric potential
Fourier transforms
Hexamethyldisiloxane
Hydrophobicity
Infrared spectroscopy
Insulation
Microscopy
Moisture effects
Molecular
Optical and Plasma Physics
Photoelectrons
Physical Chemistry
Physics
Physics and Astronomy
Plasma jets
Polymethyl methacrylate
Quantum Information Technology
Quantum Physics
Regular Article – Plasma Physics
Spectroscopy/Spectrometry
Spectrum analysis
Spintronics
Surface flashover
Voltage
Water discharge
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Summary:The surface insulation performance of insulating materials is crucial for the electrical equipment safe operation and power system stable operation. The improvement of the surface hydrophobicity of insulating materials is important to improve surface flashover voltage. In this paper, an Ar/hexamethyl disiloxane (HMDSO) atmospheric-pressure plasma jet array is constructed to improve the surface hydrophobicity and insulation performance of polymethyl methacrylate (PMMA). With the discharge characteristics and water contact angle (WCA) measurements at different HMDSO contents and treatment times, the surface hydrophobicity of PMMA can be improved significantly and the maximum WCA value can reach about 153°, which meets the standard of super-hydrophobic surface and be benefit of free pollution and moisture. The physical and chemical changes in the treated PMMA surface at the optimal treatment conditions (60 s treatment time and 0.08% HMDSO content) and the untreated PMMA surface are investigated by atomic force microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. It is found that the treated PMMA surface is covered with the dense nanoscale film and silicon containing hydrophobic groups. The corona onset, dry and wet flashover voltages of the PMMA surface before and after jet array treatment are compared. It is found that the corona onset voltage is increased from 10.0 to 13.8 kV, the dry flashover voltage is increased from 15.1 to 19.2 kV, and the wet flashover voltage is increased from 8.2 to 12.4 kV. The mechanisms of the enhancement of the surface insulation performance of insulating materials and the surface hydrophobic modification are discussed. Graphic abstract
ISSN:1434-6060
1434-6079
DOI:10.1140/epjd/s10053-022-00417-3