Investigation of Super-hydrophobic Surface Prepared by Atmospheric-pressure Plasma Vapor Deposition and Its Anti-dust, Acid-and-alkaline Resistant Properties
基金项目:
中国南方电网有限责任公司科技项目(GZKJXM20170287);
国家国际科技合作专项项目(2015DFR70390);
Project supported by Science and Technology Project of China Southern Power Grid (GZKJXM20170287), International Science & Technology Cooperation Program of China (2015DFR70390);
In order to reduce the impact of the external environment on the operation safety of transmission lines, a super-hydrophobic surface is successfully prepared on the insulator glass material and the aluminum material under the atmospheric pressure, by using a dielectric barrier discharge device of a needle-tube structure. The static contact angle of the surface reaches 165° and the rolling angle is lower than 3°. The plasma is driven by AC power and generated by the gas mixture of argon/HMDSN. The radiation spectrum shows that the silicone monomer is cracked and reacts with air to generate a large amount of C—H and C—O groups. The FTIR shows that the super-hydrophobic film contains a plenty of CH3 groups, and it has a nano-scale structure similar to the lotus leaf from the results of AFM and SEM analyses. Finally, the surface corrosion resistance to acid and alkali and the self-cleaning properties of super-hydrophobic surfaces have been investigated, the results show that the prepared super-hydrophobic film can effectively prevent corrosion of strong acid and alkali and has a certain anti-pollution ability.
KEY WORDS :atmospheric pressure plasma;dielectric barrier discharge;super-hydrophobic film;corrosion resistance;anti-fouling;
图12
超疏水薄膜静态接触角及滚动角在不同溶液中浸泡不同时间后的变化曲线
Fig.12
Variation of water contact and rolling angles of prepared super-hydrophobic films after immersing in different solutions
图13
不同pH值液滴的水接触角及滚动角变化曲线
Fig.13
Variation of water contact and rolling angles of prepared super-hydrophobic films by water drops with different pH values
图14
超疏水表面(左)和未处理表面(右)的自清洁能力
Fig14 Self-cleaning on hydrophobic surfaces (left) and untreated surfaces (right)
5)后续研究将围绕超疏水表面与玻璃及金属基底间的粘附强度、预防污闪性能等方面开展。
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