Preparation And Characterization Of Super-hydrophobic Surface Of Micro-nanocomposite Microstructure

Super-hydrophobic surfaces have self-cleaning, anti-fogging, anti-icing, drag reduction,restrain surface oxidation and many other excellent properties. Have great application value in theindustries of construction, textile, communication, navigation, aviation, et al. For the past few years,researchers from biology, physics, chemistry, material and engineering have been attracted to thisdynamic area. Studies found that building micro-nanocomposite structure on solid surface is one ofthe main factors to the super-hydrophobicity of surfaces. As most researchers use expensiveequipments and complex processes in the past, that’s seriously limit the practical application ofsuper-hydrophobic surfaces. In this paper, we tried to use the most simple and economical methodsto build super-hydrophobic surfaces of micro-nanocomposite structure and obtained some betterresults.（1） Use the method of self-assembly preparated TiO₂super-hydrophobic surface of micro-nanocomposite structure by one step. Results showed that the product was composed by manyurchin-shaped TiO₂spheres with diameters about12.5μm, and the urchin-shaped TiO₂spheresconsisted of numerous sharply tipped micro-daggers. Moreover, the surface has great contact angle（CA） and small slid angle （SA）, moreover the stability of the surface is very well. These providethat the super-hydrophobicity of the surface is very well.（2） Tunable adhesive forces on the super-hydrophobic nanostructured Co₃O₄films have beenachieved by simply rubbing the as-prepared films. After been rubbed, the micro-nanocompositestructure of the surface was changed, and the CA of the super-hydrophobic surfaces is rangingfrom extremely low （about2°） to very high （90°）. This method is simple and visualized, with noneed of precise instrument, greatly saved manpower and money. This method is worth to beresearched and generalized, provide a new research mentality to other people.（3） Here we preparated super-hydrophobic surface with Fe and SiO₂nano-particlessuccessfully. The process is direct compression, sinter molding and then surface chemical corrosion. After been magnetized and magnetized, the sample acquired and lost magnetism, thisproperty can be used to no-less transport of magnetic fluid droplets.