Preparation And Application Of Superhydrophobic Material

Superhydrophobic surfaces with water contact angles（WCA）greater than 150 and slide angles（WSA）lower than 10 have received great interest because of their unique water antigravity phenomenon and self-cleaning properties.Moreover,the practical applications of water-repellency are ranging from biomimicry to commodity materials such as anti-fouling,anti-icing,anti-bacterial,fluid drag reduction,and separation technique.It has been discovered that water droplets on hydrophobic surfaces can even be approaching approximately up to 180°.Surface wettability is governed by the microstructure and surface energy of a solid;thus the surface wettability can be controlled by the modulation of surface energy and roughness of a solid.In this paper,using a variety of means and chemicals to build a superhydrophobic surface containing special structure,to achieve a change of different solid surface wettability.The main research details and consequence are as follows:1.Polydivinylbenzene/polypentafluorostyrene micro-roughness surfaces（HS-PDVB/PFS）were successfully fabricated through SiO₂ templates.Carefully,we explore the effects of fluoride on the water repellence of solid surface.2.Superhydrophobic polydivinylbenzene surface（HS-PDVB）containing micro-and nanostructure is created by SiO2 microspheres.The materials were characterized by FT-IR,SEM,and optical contact angle measurements.Particularly,the resulting surface can hold water droplets Cassie-Baxter model.More importantly,this surface shows outstandingdurabilityandself-cleaningproperties,whichremains superhydrophobicity with contact angle of 166.0°and sliding angle of 3°.The fluoride-free superhydrophobic surface was construct within a certain range of pore size.This method not only to degrease the cost of superhydrophobic materials,but also has the significance of environmental protection.3.According to the property of superhydrophobicity,HS-PDVB composite coating mesh films were used to separate oil and water.A simple oil-water separation device was designed to investigate the separation ability of the prepared mesh films.As the result,the oil removal rate was more than 99%.