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Nano zinc oxide

Edit: Ccdanni 2020-02-02 Mobile

  Understanding Nano Zinc Oxide

  Nano zinc oxide is a new type of high-functional fine inorganic product facing the 21st century. Due to the miniaturization of particle size and large specific surface area, nano zinc oxide has the surface effects, small size effects and macro quantum tunnels of nano materials Effect, etc. The magnetic, optical, electrical, and sensitive aspects of nano-scale zinc oxide have special properties and new uses that are unmatched by ordinary products. Its application prospects are very broad and attractive.

  

  Application in cosmetics

  New sunscreens and antibacterials

  Sunlight includes X-rays, ultraviolet rays, infrared rays, visible light, and electromagnetic waves. Appropriate ultraviolet radiation can help human health, but excessive ultraviolet rays can damage the human immune system, accelerate skin aging, and cause various skin problems. In recent years, with the destruction of the atmospheric ozone layer, the intensity of ultraviolet rays reaching the ground has increased, and the protection of ultraviolet rays has become a very important personal protection research topic.

  The corresponding absorption wavelength of zinc oxide is 388nm, and due to the quantum size effect, the finer the particle, the better it can absorb ultraviolet rays, especially for 280-320nm ultraviolet rays. Nanoparticles also have good visible light transmission. Experiments show that nano ZNO is an ideal ultraviolet shielding agent, so adding nano ZNO in cosmetics can not only block ultraviolet sun, but also antibacterial and deodorant.

  Self-cleaning ceramics and antibacterial glass

  The ceramic industry is a big user of nano ZNO. Nano ZNO can reduce the sintering temperature of ceramic products by 400-600 degrees Celsius, and the finished product is as bright as a mirror. Ceramic products with nano ZNO have self-cleaning effects of antibacterial deodorization and decomposition of organic matter, which greatly improves product quality. In addition, nano-ZNO-added glass can resist ultraviolet, abrasion, antibacterial and deodorization, and can be used as automobile glass and architectural glass.

  Application in rubber industry

  In the rubber and tire industry, zinc oxide is an essential additive. During the vulcanization of rubber, zinc oxide reacts with organic accelerators, stearic acid, etc. to form zinc stearate, which can enhance the physical properties of vulcanized rubber. It is also used as a vulcanization activator and supplement for natural rubber, synthetic rubber and latex. Strong agent and colorant. Nano ZNO is a raw material for manufacturing high-speed wear-resistant rubber products. It has the advantages of preventing aging, anti-friction and fire, long service life, and small dosage.

  Application in building materials

  Antibacterial plaster products

  After mixing nano ZNO and metal peroxide particles in gypsum, gypsum products with bright colors and easy to fade can be obtained. Its excellent antibacterial properties are suitable for building materials and decorative materials.

  Application in coating industry

  In the coatings industry, in addition to its tinting power and hiding power, zinc oxide is also a preservative and luminescent agent in coatings. It also has excellent anti-aging ability and good antibacterial properties.

  gas sensor

  The nano-ZNO can cause the electrical properties to change with the change of the composition gas in the surrounding atmosphere, and thus the resistance can be detected and quantitatively measured. At present, products such as gas alarms and hygrometer sensors that are prepared for the resistance change of nanometer zinc oxide have been put on the market. Experiments show that the nano ZNO gas sensor has higher sensitivity to LPG (liquefied petroleum gas).

  Image recording material

  Nano-ZNO can obtain materials with different properties such as photoconductivity, semiconductor and conductivity according to the preparation conditions. Using this variation, it can be used as an image recording material; it can also be used for electronic photography using its photoconductive properties; it can be used as a discharge breakdown recording paper using semiconductor properties; it can be used as an electrothermal recording paper using conductive properties. The advantages are no pollution of three wastes, good picture quality, high-speed recording, adsorption of pigments for color copying, and hydrophilicity after acid etching for film printing.

  Catalysts and photocatalysts

  Nano ZNO has a small size, a large specific surface area, a surface bond state different from that inside the particle, and incomplete coordination of surface atoms, which results in an increase in the number of active sites on the surface and increases the reaction contact surface. In recent years, attempts have been made to decompose and treat harmful substances in water with photocatalysts. Among them, important photocatalysts include nano titanium oxide and zinc oxide.

  Under the irradiation of ultraviolet light, nano ZNO can decompose organic substances, antibacterial and deodorant. This photocatalytic property has been widely used in industries such as fiber, cosmetics, ceramics, environmental engineering, glass and building materials.

  Phosphors and capacitors

  Nano ZNO is the only substance that can fluoresce under low-voltage electron rays. The light color is blue and red. ZNO-added ceramic powder is a sintered sheet with a high dielectric constant and a fine and smooth surface, which can be used to manufacture ceramic capacitors.

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