Study On Fabrication Of Superhydrophobic Surface And Properties Of Wettability And Anti-icing

Superhydrophobic surfaces have prosperous applications in many fields due to their excellent properties,such as water-repellency,selfcleaning,anti-icing,drag-reduction,anti-corrosion,and so on.Currently,some investigation progresses have been devoted to the study of fabrications and properties of superhydrophobic surfaces.However,the anti-icing researches on superhydrophobic surfaces are scanty.Thus,the anti-icing researches on superhydrophobic surfaces need to be reinforced.In this paper,the superhydrophobic surfaces were prepared by facile,time-saving and novel methods,and properties of wettability and antiicing of the as-prepared superhydrophobic surfaces were studied.The anti-icing mechanisms have been analyzed and discussed.The main investigation content and innovation are described as follows:?1?A superhydrophobic LDPE surface was prepared based on a facile,time-saving and novel method,burning candle and simple deposition on a low density polyethylene?LDPE?substrate.The water contact angle and sliding angle of the as-prepared superhydrophobic LDPE surface were respectively 160±2° and 1°.The wettability test of the superhydrophobic LDPE surface was performed under condensation.The results show that the as-prepared superhydrophobic LDPE surface could retain superhydrophobicity under condensation conditions.The reason of the as-prepared superhydrophobic LDPE surface remaining superhydrophobicity under condensation was analyzed by establishing models and observing the surface microstructure characteristics and the wettability under condensation conditions.?2?The PDMS/SiO₂ coating was prepared using nano SiO₂ and PDMS as raw materials at first,and then the prepared PDMS/ SiO₂ coating was spared to the common epoxy composite surface.A superhydrophobic epoxy composite surface was obtained when the coating were solidified and dried.The anti-icing property was studied on the superhydrophobic epoxy composite surface,and the results showed that the anti-icing property of the superhydrophobic epoxy composite surface was better than the common epoxy composite surface.?3?A translucent emulsion was prepared using nano SiO₂ and ethanol as raw materials at first,and then the translucent emulsion was sprayed onto a common glass surface.Effects of the mass fraction of SiO₂ on water contact angle,sliding angle and optical transmission of the as-prepared surfaces were investigated.The results show that the asprepared superhydrophobic surface showed excellent water repellency,anti-pollution and transparency when the mass fraction of SiO₂ was 1.5%.