What Is a Zinc Oxide Coating?

Nano coating refers to the advanced technology of nano non-toxic coating, and high-tech nano coating technology. This high-tech nano-coating is not only non-toxic and harmless, but also slowly releases a substance that degrades harmful substances such as formaldehyde and xylene indoors.

Nano coating

Nano coating refers to the advanced technology of nano non-toxic coating, and high-tech nano coating technology. This high-tech nano-coating is not only non-toxic and harmless, but also slowly releases a substance that degrades harmful substances such as formaldehyde and xylene indoors.

All traditional surface coating technologies can be used or slightly modified to achieve nano-material composite coatings.

Chinese name

Nano coating

Craftsmanship

Advanced technology of nano non-toxic coating

Technology

Nano coating technology

Special color

Non-toxic and harmless, slowly releases a substance

According to the composition of the nano-coating, it is divided into three types: a composite system composed of one nano material system and two (or more) nano-materials, which is called 0-0 composite; a composite system with nano-materials, called O 2 composite.

The complete coating of nanomaterials is still quite far from commercialization, and it is only used in military applications. However, with the help of traditional coating technology and the addition of nano-materials, the functions of traditional coatings can be greatly improved, and there is no need to increase the cost of the technology. This nano-added composite system coating can soon reach the market and show strong application momentum.

Utilizing the existing coating technology, nano-composite coatings can be obtained by adding nano-materials to the properties of the coating. The implementation object of the nano-coating can be either a traditional material matrix, powder particles or fibers for surface modification, coating, modification or adding new characteristics.

Adding a nanophase to a high-hardness, wear-resistant coating can further increase the hardness and wear resistance of the coating and maintain high toughness.

Adding nanoparticles to the surface coating can reduce the coefficient of friction, form a self-lubricating material, and even obtain a super-lubricating function. In some coatings, C60, Bucky tube, etc. are combined to prepare new super-lubricating materials. The introduction of nano-materials in the coating can significantly improve the material's high temperature resistance and oxidation resistance. For example, depositing a nano-Ni-La203 coating on the surface of Ni, due to the action of nanoparticles, prevents the short-circuit diffusion of nickel ions and improves the growth mechanism and mechanical properties of the oxide layer.

Nano-material coating can improve the corrosion protection ability of the substrate, and achieve the purpose of surface modification and decoration. Adding nanoparticles to paints or coatings can further improve its protection ability, can withstand the effects of atmospheric and ultraviolet rays, thereby achieving anti-degradation and anti-discoloration effects; in addition, it can also be used in building materials products, such as sanitary ware, indoor space, appliances, etc Nano-material coating is used to produce sterilization and cleaning effects.

Nanomaterial coatings have widely varying optical properties. Its optical transmission spectrum can extend from ultraviolet to far infrared. The nano-multi-layer combination coating has fluorescence in the visible range after processing, and is used for a variety of optical applications, such as sensors and other devices. Applying nano-material coating on the surface of various signs to become luminous and anti-cursive signs; changing the composition and characteristics of the nano-coatings to obtain effects such as photochromic, thermochromic, and electrochromic, resulting in special security and identification methods. 80nm yttrium oxide can be used as infrared shielding coating, which can reflect heat efficiently. Coating nanomaterials on the surface of products such as glass can reduce the transmission of light and heat, and produce thermal insulation. Adding nanomaterials to coatings can play a role in flame retardance, heat insulation and fire prevention.

After nano-composite coating, it has excellent electromagnetic properties. The coating formed by nano-particle coating has good absorbing ability and can be used for stealth coating. Nano-sized titanium oxide, chromium oxide, iron oxide, zinc oxide and other semiconductor-like particles are added to the resin to form a coating, which has good electrostatic shielding performance; 80nm barium titanate can be used as a high dielectric insulation coating, 40nm Fe3O4 can be used in magnetic coatings; nano-structured multilayer film systems produce giant magnetoresistance effects and are expected to be used as read heads in storage systems.

The University of Michigan and the Air Force Research Laboratory have jointly developed a new type of nano-coating material, more than 95% of which is air and can repel hundreds of liquids. This material is applied to a gauze or fabric, and its surface can form an elastic force against liquid. Not only is the clothing made from this kind of cloth super resistant to pollution and protecting the wearer from chemicals, it is also possible to develop advanced waterproof coatings for ships, greatly reducing the drag of water on ships. Related papers have been published in the recently published Journal of the American Chemical Society.

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The manufacturing methods of nano-coating mainly include vapor deposition, various spraying (including normal temperature spraying, flame spraying and plasma spraying, etc.), plating (including electroplating and chemical plating) and other methods ^[1] .

Vapor deposition: Nano-films or nano-coatings can be formed on the surface of the substrate by chemical or physical vapor deposition.

Nano spraying: The main advantages of thermal spraying to prepare nano-structured coatings are simple process, large range of coating and substrate selection, large range of coating thickness variation, high deposition rate, and easy formation of composite coatings.

Nano-coating: Adding appropriate nano-particles to ordinary coatings can greatly improve the suspension stability, water resistance, adhesion, smoothness, and aging resistance of the coating, and can also obtain some special properties such as photocatalysis. Light, absorption of electromagnetic waves, anti-static, etc.