Studies On Fabircation, Structure And Properties Of Superhydrophobic Surface

More and more people have realized the superhydrophobic phenomena of louts leaf andthe legs of water striders etc., the superhydrophobic materials have many applications invarious areas including self-cleaning, anti-corrosion material, improving blood compatibility,reducing resistance, and so on by studies. It will greatly improve the quality of people’s livesif we can apply this surface to the daily life. From studies of superhydrophobic surfaces, averdict can be drawn that the superhydrophobicity of material surfaces is governed by boththe chemical composition and surface microstructure of the surface, so we can obtain thesuperhydrophobic surface by chaging the chemical composition of materials surface and thesurface structure. This paper is mainly based on the above theory to fabricate thesuperhydrophobic surface. It maybe simultaneously prepare both the micro-nano structure andlow surface free energy material on zinc substrate, or modifying a hierarchical surfacestructure with low surface energy materials or fabricating a hierarchical structure on a lowenergy surface. The major research content of this essay is as follows:1．A brand new and efficient method of preparing superhydrophobic surface on zincplate modified with3-trifluoromethylbenzene diazonium tetrafluoroborate salts (CF3BD) isreported. which exhibits excllent hydrophobicity with a water contact angle of160°for a4μlwater droplet and a low sliding angle of about1°. More importantly, this superhydrophobicsurface shows outstanding durability and self-cleaning properties, which remainssuperhydrophobcity with contact angle of157.7°and sliding angle of4°after being placed inair for18months.2．Flower-like structures were fabricated on zinc surfaces by the way that the zincsubstrates were immersed perpendicularly into copper-bath (CuSO4) and followedhydrophobization by1-octadecanethiol ethanol solution. The prepared sample have a highwater contace angle of157.9°and a small sling angle of less than2°. The study shows that thehigh surface superhydrophobicity comes from the special hierarchical structure along with thelow surface energy material. 3．Micronano-roughness surfaces were successfully fabricated on room temperaturevulcanized silicone rubber surface by replica-molding technique. The templates A4paper andnotebook paper used in this experiment is low-cost, easy to achieve. Besides, micron sizedstructure was also prepared on the high temperature vulcanized silicone rubber surface by thesame technique.