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New nano-coating options for the home improvement process continue to improve indoor decoration pollution and quality of decoration
? New nano-coating options in the home improvement process continue to improve indoor decoration pollution and quality of decoration
? With the current continuous development of nanotechnology, nanocoatings appeared in the paint industry, and its appearance certainly attracted a lot of attention. Nanocoatings are the product of the docking of nanomaterials and coatings, a kind of high-tech functional coatings. Home improvement In the process of new nano coatings choose to continuously improve the indoor decoration pollution and quality of decoration.
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1, New nanomaterials excellent advantage
The so-called nanomaterials, refers to the material particle size there is a one-dimensional scale in the 0.1 ~ 100 nanometers, nanomaterials, due to the presence of a large number of atoms in the grain boundaries and the local atomic structure is different from the bulk crystalline materials, so that the nanomaterials of the increase in the free energy of the nanomaterials, the nanomaterials are in an unstable state, which makes them unique. stabilized state, which makes them have unique interface effect, size effect and quantum effect.
Zinc oxide nanomaterials, due to their small particle radius and large specific surface area, display many novel physical and chemical properties compared to ordinary zinc oxide materials, and thus have special properties and new applications that are incomparable to ordinary zinc oxide materials.
As nano-zinc oxide is a good photocatalyst, there is light irradiation, in the water and air can automatically decompose the free movement of negatively charged electrons, while leaving positively charged holes, thus activating the oxygen in the air so that the oxygen into active oxygen, which can kill most of the germs and viruses killed. Therefore, adding nano-zinc oxide glass, ceramic products can have self-cleaning performance. When firing ceramics, the use of nano zinc oxide dosage can be reduced to ordinary zinc oxide dosage of 1/2 to 1/3, but has a higher strength and hardness, lower sintering temperature, and a brighter surface.
Nano-sized zinc oxide rod particles are used in the manufacture of a wide range of functional products, with frequent applications in sensors, health detectors, and air detectors. The powder of the mixture of nanometer zinc oxide and zinc sulfide with other pigment and filler is added to the aqueous solution containing additives dispersed and ground to a certain fineness to make the slurry of emulsion paint, and then add the emulsion and paint mixing to prepare a new type of health coating.
2, New development of health - new nano-coating
The new nano-coating is composed of nano zinc oxide and zinc sulfide nano zinc compounds powder, of which the nano zinc oxide has a good chemical stability and thermal stability, and non-toxic, tasteless, non-irritating and so on; The zinc sulfide powder has low solubility in water and is more stable under the condition of pH 8 to 9. It also has excellent adaptability to dispersants, thickeners and pigmented fillers, and does not show any instability phenomenon.
From the results of thermal storage stability of prepared interior paints containing zinc nanocompounds, the appearance and fluidity of the paints were well maintained, the paints were not water-splitting, and there was little change in the viscosity of the paints before and after the test. Even in the case of higher concentration dosage, there were few changes in viscosity before and after storage.
The scrub resistance of latex paint mainly depends on the filler in the latex paint, which is due to the calcium carbonate in the filler can directly affect the scrub resistance of latex paint. The scrub resistance of general film-forming substances is directly related to the hardness of the paint film. If the paint film is too soft, the filler will not be able to provide strong scrub resistance. Theoretical contribution of powders in fillers to the scrub resistance of emulsion paints: In the case of guaranteeing a certain scrub resistance of emulsion paints, zinc nanocompounds can complement the filler composition. According to the test results, it can be seen that in the case of latex paint formulations with other components unchanged, the scrub resistance increases with the addition of nano-zinc compounds, and is higher than the same amount of ordinary zinc oxide powder.
? By studying the antimicrobial effect of the new nanocoatings, it can be seen that the nano-zinc compounds have a very good bactericidal effect on Escherichia coli, with a faster and more efficient bactericidal rate. The antibacterial active ingredient in the antimicrobial agent containing nano-zinc oxide is powerful zinc ions, in which the water solubility and stability of nano-zinc oxide are very good, and the two complement each other, which makes the antimicrobial effect of this antimicrobial agent is very obvious and ensures the long-lasting and durable antimicrobial effect.
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