Preparation And Anti–icing Behavior Of The Al Alloy/phenolic Resin Super-hydrophobic Surface

The so–called superhydrophybicity is assumed to be a special property of thesolid surface which a lotus leaf surface shows. When a water droplet is in contact withit, the apparent contact angle is larger than150°and the sliding angle is smaller than10°. Because of such an ability to make a water droplet roll easily on its surface, thesuperhydrophobic material has excellent function of self–cleaning, anti–fogging,anti–raining and snowing. The superhydrophobic surface with great potential hasattracted people’s attention. Many physical and chemical methods of preparation usedfor the superhydrophobic surface have been developed one after another owing to theefforts of the researchers. But some of them are impracticable with the high cost andthe rigorous considitions, all of which restrict the application of superhydrophobicmaterials. By studying, we proposed some methods to prepare the superhydrophobicsurface, for example ZnO deposition, etching, modify phenolic resin and so on. Weused those methods prepared the superhydrophobic surface on Al alloy. We obtainedthe polymer material expanded the scope of the application. The main contents are asfollows:(1) Superhydrophobic surface was prepared by deposition and one–step etching.We obtained the samples with the apparent contact angle of more than150°and thesliding angle of less than10°. Their anti–corrosion also got to be researched whichwas obtained in experiment. The obtained results show that superhydrophobicmaterial has a certain resistance to corrosion.(2) The commonly phenolic resin polymer compound was modified by organicchemical way and we obtained a polymer coating which had hydrophobic propertyand soluble in organic solvents.. The material was tested by contact angle measuringinstrument, scanning electron microscopy, infrared spectroscopy and so on. Thecontact angle of the polymer material greater than150°without modified withFluorosilanes. SEM images show that the size of the material is micrometers.(3) In this study, we researched the anti–icing behavior of superhydrophobicsurface from the Al alloy and phenolic resin polymer. The study found that thematerial obtained the anti–icing performance after treatment of etching solution withdelayed freezing time of600～700s compared with the sample without any treatment.The delayed freezing time of the organic polymer was also not less than200s. Themethods of preparation and anti–icing mechanism were applied to the surface of the high–voltage cable. For the high–voltage cable, the surface treated with an etchingsolution, its hydrophobic property and anti–icing capability were greatly improvedwith contact angle bigger than150°and sliding angle less than10°as well as thedelayed icing time of not less than400s.