Nano zinc oxide is a good vulcanization activator. Since nano-zinc oxide can be combined with rubber molecules at the molecular level, it can improve the performance of the rubber compound and improve the characteristics of the finished product. Take radial tires and other rubber products as examples. The use of nano-zinc oxide can significantly improve the thermal conductivity, wear resistance, tear resistance, tensile strength and other indicators of the product, and its dosage can be saved by 35~50%, which greatly reduces the cost of the product. Extending the scorch time of the rubber compound is beneficial to the processing technology.

Nano zinc oxide is used in rubber shoes, rain boots, rubber gloves and other labor protection products, which can prolong the service life of the products and improve their appearance and color. It is used in transparent or colored rubber products and has traditional active agents such as carbon black. An irreplaceable role, nano-zinc oxide is used in air sealants, gaskets and other products, and also has a good effect on improving the wear resistance and sealing effect of products.

In coating applications, the UV shielding performance of nano ZnO is one of the biggest development points. The shielding ability of metal oxide powder to light is greater when its particle size is 1/2 of the wavelength of light. In the entire ultraviolet region, zinc oxide absorbs light more strongly than titanium oxide. The effective action time of nano-zinc oxide is long, and the wavelength band for ultraviolet shielding is long.

It has a shielding effect on long-wave ultraviolet UVA and medium-wave ultraviolet UVB, can pass through visible light, and has high chemical stability and thermal stability. Compared with organic amine light interfering agents, nano-zinc oxide has obvious advantages in preventing photodegradation. Nano-zinc oxide can be used in ultraviolet light shielding materials, antibacterial agents, fluorescent materials, photocatalytic materials, etc. in the textile field. When the metal zinc oxide powder is made into nano-scale, since the particle size is equal to or smaller than the light wave, the size effect increases the interval between the conduction band and the valence band, so the light absorption is significantly enhanced. At 350~400nm (UVA), the shading efficiency of zinc oxide is high, and the refractive index of zinc oxide (n=1.9) is small, and the diffuse reflectance of light is low, which makes the fiber transparent and conducive to textile dyeing and finishing-Ceramic Materials are one of the three pillars of materials. The application of traditional ceramic materials has great limitations. With the wide application of nanotechnology, nano-ceramics have emerged. Nano-ceramics are known as "universal materials" or "21st century-oriented "New materials", the so-called nano-ceramics, refers to ceramic materials with nano-scale phases in the microstructure, that is to say, the grain size, grain boundary width, second phase distribution, defect size, etc. are all in the nano-precious scale. on the level. The ceramic products added with nano-ZnO have the self-cleaning effect of antibacterial deodorization and decomposition of organic matter, which greatly improves the product quality. Products treated with nano-zinc oxide antibacterial can be used to make bathtubs, floor tiles, walls, toilets and table stones. Glass added with nano-ZnO can resist ultraviolet rays, shochu grinding, antibacterial and deodorization, and can be used as automotive glass and architectural glass. The UV-shielding coating of the glass consists of nano-ZnO. Due to the miniaturization of particle size and the sharp increase of specific surface area, nano-zinc oxide produces surface effects, small size effects and quantum tunneling effects that are generally not available in micron and sub-micron zinc oxides. It can reduce the firing temperature of ceramics and has strong covering power, making ceramic products as bright as mirrors. In addition, nano-zinc oxide can also be used as a UV absorber in cosmetics, as a catalyst in the chemical industry, and as a material for semiconductor devices.

During the development of organic accelerators, people have found that zinc oxide has the effect of enhancing and promoting many accelerators, and gradually recognized the mechanism and method of zinc oxide. During the vulcanization process, zinc oxide can react with accelerators, sulfur, stearic acid, rubber macromolecular chains and the corresponding intermediate products, indicating that zinc oxide has an activation promoting effect.

Progress is complicated. However, a large number of test results show that zinc oxide, as a vulcanization activator, mainly has an important influence on the formation speed, type and number of chemical crosslinks during the vulcanization process, thereby improving the degree of crosslinking of the vulcanizate.

In the rubber compounding system, the organic compounding agent can be dissolved in the rubber compound, but the solubility of each compounding agent is different. With the change of temperature and dosage of compounding agent, some compounding agents will appear crystallized or sprayed out. The inorganic compounding agent generally exists in the compound in a dispersed state. Therefore, it can be considered that the reaction of zinc oxide as an active agent with organic accelerators, stearic acid, sulfur, etc. occurred on the surface of zinc oxide particles during the vulcanization process. Due to the large affinity of zinc oxide for electrons and the strong ability to adsorb accelerators, under the action of stearic acid, zinc salts of accelerators that are soluble in the rubber compound are formed, thereby improving its solubility and forming a kind of accelerator with amines or fatty acids. The complex of zinc makes the accelerator more active. Sulfur is added to the complex to form a strong vulcanizing agent by inducing activation. During this process, the surface of the zinc oxide particles continuously reacts, the particle size decreases continuously, and the zinc oxide is consumed until the rubber compound is fully vulcanized. It can be considered that the traditional dosage of 5 parts is based on a specific particle size of zinc oxide to fully activate the fluoride. With the change of ZnO particle size, its specific surface area and structure determine the activation of vulcanization.

In addition to being used as a vulcanization activator in the rubber compound, nano-zinc oxide also has a certain reinforcing effect on the rubber compound. Relevant studies have shown that the use of nanoparticles as fillers can significantly improve the mechanical properties of rubber. The preparation of high-strength rubber products is not only related to the volume fraction of the filler particles, particle shape, size and the interaction between fillers, but also to filler particles and rubber matrix. interactions are closely related. The bound rubber is mainly formed by the interaction between the rubber and the filler particles, so its size can be used to characterize the strength of the interaction between the filler and the rubber.

Zinc oxide has the effect of enhancing and promoting the vulcanization accelerator. During the vulcanization process, zinc oxide can react with accelerators, sulfur, stearic acid, rubber macromolecular chains and corresponding intermediate products. As a vulcanization activator, zinc oxide is mainly responsible for the formation of chemical crosslinks during the vulcanization process. The speed, type and number of cross-linking bonds have an important effect, thereby improving the degree of cross-linking of sesame rubber. In the rubber compounding system, the organic compounding agent can be dissolved in the rubber compound, but the solubility of each compounding agent is different. With the change of temperature and dosage of compounding agent, some compounding agents will crystallize or spray out. The inorganic compounding agent generally exists in the rubber compound in a dispersed state. Therefore, it can be considered that the reaction of zinc oxide as an active agent with organic accelerators, stearic acid, sulfur, etc. occurs on the surface of zinc oxide particles during the vulcanization process. Due to the large affinity of zinc oxide for electrons and the strong ability to adsorb accelerators, under the action of stearic acid, zinc salts of accelerators that are soluble in the rubber compound are formed, thereby improving their solubility and forming a kind of accelerator with amines or fatty acids. The complex of zinc makes the accelerator more active. Sulfur is added to the complex to form a strong vulcanizing agent by inducing activation. During this process, the surface of the zinc oxide particles continuously reacts, the particle size decreases continuously, and the zinc oxide is consumed to make the rubber compound fully vulcanized, which further affects the dynamic mechanical properties of the rubber compound. Then, as the particle size of nano-zinc oxide becomes smaller and the specific surface area becomes larger, the probability of surface reaction of zinc oxide also increases, which will further improve the dynamic mechanical properties of the compound.

SAT NANO is professional manufacturer of zinc oxide powder, we can supply different particle, if you have any enquiry, please contact us at admin@satnano.com