Energy-saving and environmentally-friendly solar coatings are gradually becoming popular

Everyone knows that the energy problems we face in the future have become more and more serious. If humans still want to continue to survive, we must hurry and think of ways before those poor energy sources are completely exhausted. It is.

In recent years, our scientists in the field of new energy development have indeed had a lot of research results, such as data furnaces, power generation shoes and artificial leaf power generation, etc., but the results are fruitful, and the commercial viability of many things is still Not high, it will take some time for these things to really enter our daily lives.

According to experts, solar coatings can be divided into two types of technology today. Solar coatings mainly include reflective solar coatings and solar coatings. The reflective solar coating achieves the purpose of cooling by adjusting the absorption ratio of the coating. The absorption radiation ratio refers to the ratio of the absorption coefficient α of the material absorbing solar energy to its thermal emission coefficient ε. The smaller the α/ε ratio is, the greater the degree of temperature reduction. The study of reflective solar coatings is to adjust α by selecting pigments and film-forming materials. /ε value.

According to experts, in addition to the standard performance of exterior wall coatings, the resin used in reflective solar coatings should also be selected to be resistant to UV radiation. Acrylate resins have good weatherability, UV degradation resistance and protection. Lightness is one of the most used resins in exterior wall coatings because it has good physical properties. After coating, the surface is smooth and tough, washable, with excellent gloss retention, no fading, no powdering, Strong adhesion and chemical resistance. However, the heat resistance of the coating is not good. It is easy to be sticky after being heated, which leads to a decrease in the stain resistance of the coating. It is not ideal as a base material for reflecting solar coatings. Acrylate resin. The silicone resin has good heat resistance, weather resistance, gloss retention, anti-pigmentation and UV degradation resistance, and is used for the modification of the acrylic resin.

?? Suitable for acrylic resin modified silicone resin is ethoxy (or methoxy) silicone low molecular polymer, such reactive functional group-containing silicone low molecular polymer, can be combined with hydroxyl-containing The acrylate resin is subjected to a thermal polycondensation reaction by a solvent method to prepare a silicone-modified acrylic resin, and the modified resin is effective as a base material for reflecting solar paint.

?? Absorb solar paint. According to experts, a scientist named Milche in Australia has developed a coating that can effectively absorb solar energy. The first layer of the coating is a sun-reflective layer made of silicon oxide that absorbs and reflects only sunlight that is applied to the coating to prevent heat loss. The second layer is a cermet layer that absorbs solar heat. The third layer is a metal layer having good thermal conductivity. With a total thickness of only 100 nanometers, the new coatings have been able to convert 98% of the received sunlight into heat and have a total efficiency of more than 20%.

Researchers research new solar coatings: Just this month, a team from the University of Notre Dame announced their latest achievement, an inexpensive solar cell coating that uses semiconductor nanoparticles to generate energy. The principle of this solar paint is to incorporate quantum dots, a nanoparticle that generates electricity, into a smearable mixture.

According to experts, in the titanium dioxide nanoparticles, coated with cadmium sulfide or cadmium selenide, these particles will be suspended in the hydroalcoholic mixture to form a paste mixture. Researchers say that the paste can be applied to any conductor surface to generate electricity, and the entire power generation process does not require any special equipment to collect energy. The production cost of this new material developed by the University of Notre Dame is much lower than that of commercial silicon solar cells. The most obvious thing is that its photoelectric conversion efficiency is only 1%, which is far lower than 10-15% of solar cells, the researchers said. If you can solve the problem of finding ways to improve conversion efficiency, the potential of this new material will be unlimited.

The new material is currently named Sun-Believable and is also planned to go on the market. Because although the conversion efficiency is low, how much can it subsidize the traditional power supply, which can reduce the cost of living and benefit the environment. Why not everyone?