Study On Fabrication And Performances Of The Superhydrophobic Materials With Durability And Their Application

As a new type of functional material,superhydrophobic materials have attracted the attention of researchers because of their application in the fields of oil-water separation,outdoor coating,anti-icing/deicing,water transportation,anti-corrosion and self-cleaning.In recent years,a lot of superhydrophobic materials have been successfully fabricated by a great number of methods.Nevertheless,the special micro-nanostructure of superhydrophobic materials is very susceptible to damage due to external stress,resulting in the loss of superhydrophobic properties.In oil-water separation applications,most superhydrophobic materials cannot be recycled due to lack of durability.Therefore,it is very great meaning not only to synthesize superhydrophobic material with long-term stability and wear-resistant durability by a simple,green,and inexpensive method,but also for their application in daily life and industrial production.The purpose of this paper is to fabricate the superhydrophobic materials with excellent mechanical durability and chemical stability by employing montmorillonite or kaolin particles,low surface energy compounds and some hydrophobic organsiloxane.The characteristic and properties of the superhydrophobic materials are also measured in detail.In addition,the application of materials in oil-water separation has also been studied.The main research contents of this paper are as follows:(1)The superhydrophobic materials with excellent mechanical durability and chemical stability were obtained by employing montmorillonite particles,stearic acid and organosiloxane(diethoxydimethylsilane and methyltriethoxysilane).As a modifier,the carboxyls at the end of stearic acid molecules combined with the hydroxyl of the montmorillonite surface by the covalent bonds formed via the esterification reaction.And then,a layer of stearic acid molecule membrane was formed on the surface of montmorillonite particles and made these particles possess enough low surface energy.The polymerization of organosiloxane can enhance mechanical durability and chemical stability for the as-prepared superhydrophobic.The superhydrophobic fabric was obtained by simple drop-coating.Only driven by gravity,the oil/water mixture can be separated through the fabric.Furthermore,the also fabric showed good fire resistance.(2)The colorful superhydrophobic materials with good properties were prepared by employing kaolin particles,1H,1H,2H,2H-perfluorodecyltriethoxysilane and the acrylic color.The as-fabricated superhydrophobic materials show excellent superhydrophobicity for various droplets,such as tea,coffee and coca-cola.The contact angles of these droplets are higher than 150°,and their sliding angles are below than 10°.The colorful superhydrophobic fabric was obtained through simple ultrasound.Meanwhile,with the aspect of oil/water separation,different kinds of heavy oil/water mixtures could be efficiently separated by the colorful superhydrophobic fabric,and the separated efficiently keep over 92%even after 8 cycles of separation on oil/water mixture.Furthermore,the as-prepared colorful materials also showed good antibacterial properties.