Study On Low Cost Superlyophobic Film And Wetting Performance

Nearly 30 years, through the simulation of lotus leaf, water spider, and such as Micro/nano structure of nature, people use MEMS technology, nano technology, successfully developed many contact Angle over 150 degrees and droplet easy slide of super hydrophobic materials, and widely used in architectural coatings and traffic navigation and other fields.But they are usually of low surface energy of liquid more lyophilic instead, low surface tension of liquid, such as oil, organic solvent, etc. usually only a third of the water surface tension, in this kind of super hydrophobic surface tend to spread rapidly to don’t have access to over 90 degrees in thin oil effect.In recent years, superlyophobic materials as super hydrophobic material upgrade and expansion, caused a great interest in study.So-called superlyophobic material to almost all the liquid has contact Angle of 150 degrees or more, can greatly reduce any adhesion force and flow resistance on the surface of the liquid in the table, and the pressure stability is better than the same structure of super hydrophobic surface, therefore is expected to replace super hydrophobic materials in many fields and applied in more fields.This paper revolves around super lyophobic preparation and characterization of wettability on the surface of the film.Using the low cost of EVA emulsion as material to the preparation of transparent emulsion film, and then do surface modification on the membrane surface, which was prepared with super lyophobic properties of thin film.This paper focus on:Firstly, we use the Si base template as the mother-template, with superlyophobic properties of film. First of all, using the Si base template as mother-template, use "transfer printing technology, with the aid of elastic material, will transfer to the Si based template microstructure can be solidified material surface, thereby gaining and complementary to the Si base template surface structure, and then spin EVA emulsion on the surface, which was prepared with Si base template surface consistent microstructure.Secondly, using double-photoresist template preparation of superlyophobic emulsion membrane. Through double resist the template of the preparation of the experiment, and then do after surface modification on the surface, using the method of step replication, screw EVA emulsion coating on the template, the emulsion film is prepared, then completes the surface modification on the emulsion film, and help to prepared supelyophobic membrane.