Study On The Fabrication Of Slippery Superhydrophobic Surfaces And Sticky Superhydrophobic Surfaces

Inspired by the "Lotus effect" and " Petal effect",the slippery superhydrophobic surfaces(a typical example: "lotus leaf")and the sticky superhydrophobic surfaces(a typical example: "red rose petals")have attracted tremendous research attentions.As these two special surfaces have a very wide range of applications in people's daily life and industrial production,more and more people are involved in studies on the preparation of them.In general,the wettability of solid surfaces is both determined by the microscopic morphology and chemical composition of the solid surface.Therefore,we can obtain superhydrophobic surfaces by constructing special micro-nano structures and modifying the material chemical composition on the solid surface.In this paper,by using different fabricating methods,we have respectively prepared transparent/slippery superhydrophobic surfaces and sticky superhydrophobic surfaces on glasses.The main contents are as follows:1.The carbon black film acting as the template,the chemical vapor deposition method and annealing technology were combined to prepare a transparent superhydrophobic glass successfully through the "complete replication" of the carbon black film.The water contact angle of the sample is up to 162° and the rolling angle is low to 3°.Besides,the transmittance of the coated glass is up to 92% in the wavelength range of 350-800 nm,compared with 90% of the untreated one.Moreover,the sample also has excellent acid and alkali resistance and thermal stability.2.The carbon black film acting as the template,the sol-gel method and annealing technology were combined to obtain a kind of new micro-nano surface by expanding the pore of carbon black film.The surface exhibited a high water contact angle of 160° and meanwhile,the water droplets could steadily stay on the surface even when it is upside down that showing a good sticky superhydrophobicity.In addition,the sample also has good acid and alkali resistances thus it can be applied in the study of corrosive liquids.At last,by combining the aforementioned two kinds of superhydrophobic surfaces,we realized the transportation of liquid microdroplet from the sticky superhydrophobic surface to the sticky superhydrophobic surface which demostrating a huge feasibility in the microdroplet-transfering.