Painting made of glass to protect any surface - VIDEO PDF Print E-mail
Thursday, 20 August 2015 06:00
Sunlight can cause rapid wear of various materials and structures, including military vessels roofs, metal pipes, roofs of houses, cars and so on. Moreover, excessive heat, which comes along with the Sunlight, sometimes makes staying in an unventilated room unbearable. A team of researchers from the Applied Physics Laboratory at Johns Hopkins University developed a new dye-based coating of glass, which allows you to protect virtually any surface from aggressive Sunlight and prevent overheating. "Most paint manufacturers that cover the roof of cars or houses, are based on polymers which are destroyed by exposure to solar ultraviolet radiation. Therefore, after just a few years there is shallowing cover and yellowing. The polymers also tend to emit volatile organic compounds that can harm the environment. Therefore, we have decided to replace them with an inorganic glass, "- says the lead author of the new study Benkosky Jason (Jason Benkoski), who presented his design to the 250th meeting of the American Chemical Society. Glass also includes kremnёzema (SiO2), which can be a great cover, as it is tough, durable and has the required optical properties of materials. However, the glass there is also one very significant drawback - it is very fragile. Therefore Benkosky and his colleagues decided to experiment with kremnёzemom, or silicon dioxide, which, incidentally, is one of the most common materials in the earth's crust. Scientists have potassium silicate which is normally soluble in water, and then modify it so that it can be sprayed onto a hard surface. The result is a coating that becomes waterproof after drying. Unlike acrylic, polyurethane or epoxy paint, paint based glass is completely inorganic, that significantly prolongs its service life. Also, unlike the process, it does not crack over time. Adding to the coating pigments give new paint additional property - the ability to reflect the Sun's rays and dissipate heat. Because Sunlight is absorbed, any surface of the paint-coated, is not heated. "When you raise the temperature of any material, any device, it begins to deteriorate rapidly, and grow old. But paint keeps the surface at a temperature close to the temperature of the air, prevent premature wear of materials," - says Benkosky. The developers originally wanted to make the new paint to cover the naval vessels, but it is now clear that the commercial applications of the novelty may be longer. In the future it will be possible to "paint" the roof of houses, which will keep the temperature cool in summer and save energy expended on ventilation of premises.