At present, the traditional coatings used in building materials, vehicles, and pipe network poles are easily polluted by rainwater and stains. Repeated cleaning consumes a lot of manpower, material and financial resources, and high-altitude operations in the field will also endanger personal safety. Through technological innovation, the development of low-cost, effective, and The preparation technology of self-cleaning coatings with strong stability and environmental friendliness has become the way to solve this problem. Recently, the Chinese Academy of Sciences has successfully developed a new type of nano-material. Experiments have proved that the material can be mixed into the paint, which can reduce the dust stains on the paint surface by more than 50%, and save more than 50% of the cost of manual cleaning. After calculation, the cost of adding nanomaterials per ton of paint is only about 1,000 yuan.
Self-cleaning paint can not only effectively isolate rainwater, but also the dust on the surface of the paint can flow away with rainwater. The two preparation methods commonly used in the market currently have their own defects: the photodegradation method is only suitable for sunlight environment, and there are problems such as short coating life and low dust removal efficiency; the traditional hydrophobic method has high cost, low efficiency, poor stability, secondary pollution etc. The research group used physically modified natural nanoclay as the main material, and after organic modification, prepared a superhydrophobic nanocomposite material, which was added to the coating as an additive in a certain proportion to prepare a self-cleaning coating. This technology can also effectively reduce the electrostatic adsorption ability of the paint surface to dust, and significantly enhance the dust resistance of the paint. Compared with the traditional technology, the new technology has broad market prospects: most of the raw materials are natural materials, which have the characteristics of low cost and environmental friendliness; when preparing coatings, the addition process is simple, the production conditions do not require high temperature and high pressure, and are mild and energy-saving; the prepared The additive has strong thermal stability and light stability, and is suitable for most coatings.
