Super-Hydrophobic Surface Prepared by Atmospheric-Pressure Plasma and Its Anti-Icing, Anti-Frosting Performance
Zhang Xun1, Zeng Huarong1, Tian Chengyue1, Ma Xiaohong1, Xiong Qing2
1. Electric power Research Institute of Guizhou Power Grid Co. Ltd Guizhou 550000 China; 2. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China;
Abstract：Super-hydrophobic film was deposited on the glass substrate through plasma enhanced chemical vapor deposition (PE-CVD) at atmospheric pressure. The discharge was generated by a home-made dielectric barrier discharge (DBD) source to achieve large-area deposition. At the same time, argon gas was used as the working gas, and hexamethyldisilazane (HMDSN) was used as the precursor monomer. The super-hydrophobic surface was successfully fabricated through the DBD plasma deposition under 13.56MHz RF power excitation. The static contact angle was as high as 171.4 degrees and the sliding angle was less than 2 degrees. The optical emission spectrometry (OES) of discharge revealed that the monomer was dissociated during the deposition process, generating a large amount of hydrophobic groups. Meanwhile, nitrogen and oxygen in the air are also involved in the reactions, but not affecting the hydrophobicity of fabricated film. Atomic force microscope (AFM) and scanning electron microscope (SEM) show that the super-hydrophobic surface has a uniform micro-nano-scale roughness structure with an average roughness of about 200nm. A series of low- temperature tests were carried out in a self-made semiconductor refrigeration cavity, and it showed that the super-hydrophobic surface exhibited a good ability to prolong the formation process of icing and restrain frost.
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2019, Vol. 34 
