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The recent visit by US House Speaker Nancy Pelosi has boosted US-Taiwan relations at a time of increasing tension between Washington and Beijing. She vowed that the United States would protect Taiwan's democratic autonomy. "The United States is still determined to safeguard Taiwan's democracy," she said in a meeting with Taiwan's president, Tsai Ing-wen.
Pelosi's visit to Taiwan sparked anger in Beijing, which denounced Pelosi's visit as "extremely dangerous" to geopolitical stability. After Pelosi's visit, Beijing conducted the largest-ever military exercise near Taiwan, encircling the island with live-fire rockets and ballistic missiles. In addition, China announced that it would stop cooperation and dialogue with the United States on issues such as climate and cross-border crime prevention, indicating Beijing's intention to fight back against the United States over what it believes to be interference in China's affairs.
But perhaps most importantly for the business community, recent events have exacerbated the showdown between China and the US in the most important area of the global economy: semiconductor chips. The Sino-US chip battle, which has been brewing for years, has now reached a critical crossroads, experts say, as the two superpowers compete for technological and economic dominance. The world's chipmakers may soon be forced to choose between Washington and Beijing.
Because of the turbulent international situation, the supply and prices of many international bulk zinc oxide are still very uncertain.
Nano zinc oxide can be used in surface coating products and used in space vehicles, and there has been research on the application of nano-materials in industry, such as ceramic and rubber industry. Nowadays, the research of nano-drug delivery system and nano-drugs has been paid more and more attention by researchers, and nano-materials have been gradually applied to the medical field.
Nano zinc oxide is a new type of high-performance fine inorganic material facing the 21 century. The particle size of n is about 1~100nm. Because the particle size is too fine, the electronic structure and crystal structure of nano ZnO have changed, resulting in properties that macroscopic objects do not have, such as quantum size effect, surface effect, macroscopic tunneling effect and so on.
Zinc oxide nanoparticles sterilization and disinfection mechanism
1. Nano zinc oxide can continuously release zinc ions in aqueous medium, zinc ions will enter the cell membrane, destroy the cell membrane, and destroy the spatial structure of bacteria and proteins when they react with some protein groups in the cell. causes the protease in the cell to inactivate and kill the bacteria. After destruction, zinc ions will dissociate from the bacteria and repeat the sterilization process.
2. Nanometer zinc oxide can interact with the cell wall on the surface of bacteria, destroy the cell wall of bacteria, and cause the contents to be released to kill bacteria.
3. Under the irradiation of ultraviolet light, nano ZnO will produce hole electron pairs, electrons and holes migrate from the conduction band and valence band to the surface of zinc oxide particles, respectively, and the water or hydroxyl groups adsorbed on the surface are converted into hydroxyl radicals, and the adsorbed oxygen is transformed into reactive oxygen species. Hydrogen oxygen free radicals and reactive oxygen species have strong chemical activity and can react with most organic compounds to kill most bacteria and viruses. Because the particle size of nanometer zinc oxide is too small, the time of electrons and holes from the conduction band and valence band to the crystal surface is greatly reduced, and the probability of hole and electron recombination is also reduced, so the antibacterial property of zinc oxide with nanometer particle size is better.
The related experiments show that the germicidal rate increases obviously with the increase of the concentration of nanometer zinc oxide suspension, indicating that the germicidal efficacy is better, and the germicidal efficacy of Staphylococcus aureus is obviously better than that of Escherichia coli as the treatment time. The above experimental results show that nanometer zinc oxide suspension has germicidal efficacy.
Zinc Oxide Nanoparticles Uses
1. The manufacture of surgical clothes
Nanometer zinc oxide can absorb and scatter ultraviolet radiation, so it has the function of shielding ultraviolet radiation. Because nanometer zinc oxide is a direct band gap semiconductor, when receiving ultraviolet radiation, the electrons in the valence band can absorb the energy of ultraviolet radiation and transition to the conduction band. After the transition, hole electron pairs will be produced, and ultraviolet radiation will also be absorbed. In addition, when the long-term wavelength of UV light is larger than the particle size of nano-ZnO, the nanoparticles can scatter medium-and long-wave UV in all directions, thus reducing the intensity of UV in the irradiation direction. The particle size range of nanometer zinc oxide is generally 1-100 nm, and the ultraviolet wavelength range is 100-400 nm, so nano-zinc oxide has better shielding effect on long-wave ultraviolet (wavelength 320-400 nm) and medium-wave ultraviolet (wavelength 280-320 nm). Compared with organic ultraviolet absorbers, nanometer zinc oxide is safe, stable and reliable, and can be used as ultraviolet shielding agent and fiber materials. The nanometer zinc oxide VK-J30 produced by our company has a particle size of 30 nm and has good dispersibility in the medium used.
2. Used in dentistry
The lack of strength of the composite resin used in early dental treatment often leads to treatment failure, resulting in a mixed composite resin with better performance. Because nano-ZnO crystal needs complete structure, almost no internal defects, high strength and high modulus, and its unique three-dimensional tetragonal shape can change the mechanical properties of the material isotropic, so adding it to the composite resin system can significantly improve the mechanical properties of the composite resin. At the same time, nanometer zinc oxide can be applied to dental resin to replace traditional porcelain teeth because of its antibacterial properties.
Nano Zinc Oxide Price
The price is influenced by many factors including the supply and demand in the market, industry trends, economic activity, market sentiment, and unexpected events.
If you are looking for the latest zinc oxide nanoparticles price, you can send us your inquiry for a quote. (firstname.lastname@example.org)
Nano Zinc Oxide Supplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted zinc oxide manufacturer and zinc oxide supplier with over 12-year-experience. We ship our goods all over the world.
If you are looking for high-quality zinc oxide powder, please feel free to contact us and send an inquiry. (email@example.com)
The report by the Finland-based Center for Energy and Clean Air comes as Ukraine urges the West to cut off all trade with Russia to stop funding the Kremlin's war chest.
The European Union recently decided to impose a gradual embargo on Russian oil imports, with some exceptions, according to reports. Russian gas, on which it relies heavily, is currently unaffected.
In the first 100 days of the Conflict between Russia and Ukraine (February 24 to June 3), the EU accounted for 61 percent of fossil energy imports, or about 57 billion euros, according to the Energy and Clean Air Research Center.
Russia's revenue came first from crude oil sales (43.87 billion euros), followed by pipeline gas (22.89 billion euros), then petroleum zinc oxide, please feel free to contact us and send an inquiry.
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