A new type of self-cleaning coating for outdoor gl

2022-07-23
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A new type of outdoor glass self-cleaning coating for building has been newly launched. Japanese material engineers have invented a new type of glass self-cleaning coating, which can decompose the surface oil stain and achieve super hydrophilic effect by absorbing the ultraviolet energy in the sunlight, so as to realize the self-cleaning function. It can make glasses, windshield and sunglasses have self-cleaning fog function. This coating, developed by professors and graduate students of Japanese universities and operated according to the specified steps, avoids the formation of fog by preventing water from forming gas on the surface of glass

according to experts, since hydrophobic products are generally lipophilic, the existing atmospheric dust contains considerable organic like substances, which are easy to stick to the ash in summer and on the elastic coating with low glass transition temperature, and are not easy to remove; The glass self-cleaning coating contains a kind of nano material with photocatalytic activity, which can absorb a certain wavelength of light, generate free electrons and holes, and make the pollutants absorbed on the surface of the coating film undergo redox decomposition to remove and kill the surface micro bacteria, so as to achieve the purpose of self-cleaning. Previous studies have shown that the removal of harmful pollutants such as organic compounds and nitrides in the air, General indoor light can start the self-cleaning function of resin transfer molding process; Glass can be sure that the super hydrophilicity of the self-cleaning coating film is attributed to the formation of the surface parent region. When light shines on the surface of the coating film, the bridge oxygen bond in the surface coating film absorbs energy and breaks to form oxygen vacancies and low-cost metal ions. It also informed the World Trade Organization that the import of 24 types of recyclables and solid wastes would be stopped by the end of the year, and the latter would dissociate the chemical adsorbed water around the vacancy to form a hydrophilic region, Other surface areas remain hydrophobic, and the water droplets are always larger than (several orders of magnitude) these hydrophilic or hydrophobic areas. Therefore, the water droplets will completely spread out on the membrane surface after a certain time of illumination, which is similar to the two-dimensional capillary phenomenon. Therefore, from the microscopic point of view, there are hydrophilic and hydrophobic regions on the membrane surface, while from the macroscopic point of view, it shows super hydrophilicity. The specific functions and principles of super hydrophilic self-cleaning membrane are described as follows:

self-cleaning and anti fog

dirt can be divided into organic dirt and inorganic dirt. There is a certain amount of organic matter floating in the air, which will slowly form organic dirt on the surface of the object. This kind of dirt is difficult to be washed away by rain, and can only be removed by rinsing. The components of the self-cleaning super large hydrophilic membrane contain nano semiconductor materials with photocatalysis activity. The solar scale absorbs a certain wavelength to generate carriers, which enable the membrane surface to adsorb water and oxygen molecules to form hydroxyl radicals and reactive oxygen species. They have very strong oxidation ability, and can degrade the organics adsorbed on the surface into carbon dioxide and water, making the glass self-cleaning or easy to scrub

the antifogging ability of the self-cleaning super hydrophilic coating film is also related to the substances with photocatalytic activity. Under light, part of the bridge oxygen bonds on the surface of the oxide photocatalyst are opened, which makes the nearby adsorbed water dissociate to form hydroxyl groups. These hydroxyl groups have good hydrophilicity. When water contacts the film surface, it will be completely wetted and spread to form a thin transparent water film layer to achieve the purpose of anti fog. The self-cleaning super hydrophilic membrane also has good nano hydrophilic substances, which makes the membrane more hydrophilic

super hydrophilic self-cleaning coating is the most attractive method to prepare self-cleaning coating in the world. It can achieve self-cleaning function by absorbing the UV energy in the sunlight to produce the decomposition of surface oil and super hydrophilic effect. Such technologies and products have been successfully applied in automobile, glass, ceramics, lamps and other fields

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