The problem of climate change is quite serious and the use of the air conditioner during the heat and adds even more carbon dioxide to the atmosphere. Researchers from the Massachusetts Institute of Technology and the University of Hong Kong during experiments with existing films for the windows have withdrawn their more efficient. It remains very transparent up to +32 ° C, and at higher temperatures acquires a matte appearance. As a result, up to 70% of the sun rays are reflected, reducing the temperature of the room in the hot season. At the same time, the electricity necessary for the operation of the air conditioner is saved.
For better thermal insulation, scientists inserted tiny spheres filled with water into the polymaterial of standard film on the windows. At high temperatures, the sphere begins to contract, forcing the polyvol fiber to get closer. This gives glass a matte appearance, blocking up to 70% of the incoming heat, but without reducing illumination.
Such films were tested earlier, but they did not block heat very well. A group of scientists MIT and Hong Kong came to the conclusion that in order to improve the effect of the film, the bubbles filled with water must be increased to 500 nanometers in order to correspond to the wavelength of infrared light responsible for most solar heating.