Cerium oxide is a light yellow or yellowish brown powder. The bulk density is 7.13g/cm3, the melting point is 2397℃, and the boiling point is approximately 3500℃. This substance is insoluble in water and alkali, but slightly soluble in acid. At a temperature of 2000°C and a pressure of 15MPa, cerium oxide can be reduced by hydrogen to obtain cerium trioxide. When the temperature is released between 2000°C and the pressure is released at 5MPa, the cerium oxide is slightly yellow, reddish, and pink. Its performance It is used for polishing materials, catalysts, catalyst carriers (auxiliary agents), ultraviolet absorbers, fuel cell electrolytes, automobile exhaust absorbers, electronic ceramics, etc.
In rain or wet weather, especially in winter, moisture is easy to condense on various glass products such as building glass, car windshield, car rearview mirror, spectacle lens, etc. The main reason is humidity or The vapor condenses on the surface of the glass to form small water droplets, which atomize the glass. The water droplets on the glass substrate are in the shape of a small hemisphere and easily produce a prism-like refraction effect, thereby affecting the visibility of the mirror image and the light transmittance of the glass. The fogging of glass can bring inconvenience to people's life in the light, and endanger life safety in the worst. In addition, particles such as dust and oil on the glass surface will also affect the visibility of mirror imaging or the light transmittance of glass. For this reason, anti-fogging is a topic closely related to life and work.
In order to solve this problem, people use many methods to prevent it. The common method is to take the antifogging method, which is relatively simple and applicable. Surfactant antifogging agents have been widely reported, mainly composed of surfactants, solvents, wetting agents, dispersants and so on. This type of anti-fogging agent is simple to prepare, but due to the condensation of water on the glass surface, the surfactant is easy to lose, so the anti-fog durability is poor, and the general anti-fog time is 2 to 7 days. At present, the research results of adding oxides to the anti-fogging agent are compared. The most researched one is the photocatalytic TiO2 anti-fog film. Nano-titanium dioxide can quickly diffuse the water droplets attached to the glass surface into a uniform water film. The surface does not produce light scattering fog, and can maintain a high degree of transparency without burning. Safe to use This kind of anti-fog film has good abrasion resistance, abrasion resistance, and solvent resistance, followed by SiO2 anti-fog film and TO2/SiO2 composite film, but the disadvantage of this method is that the process is complicated and the conditions are harsh.
The special surface effect and volume effect of nano-cerium oxide particles determine its special chemical properties and special effects. Such as enhancing surface adsorption, showing high chemical reaction activity, increasing specific surface area, increasing surface active centers and enhancing surface activity, so it has high catalytic performance. When light is irradiated, it not only has catalytic function but also produces hydrophilicity. Therefore, adding ultra-fine CeO2 particles to the anti-fogging agent can enhance the surface adsorption of the anti-fogging agent; secondly, it can absorb ultraviolet light and play a role in preventing ultraviolet rays; thirdly, it can photocatalyze the organic on the surface of the glass.
Therefore, a new type of cerium oxide glass anti-fogging agent with good anti-fogging effect, long anti-fogging time, stable properties, safe, harmless, and simple production is developed by using nano-rare earth cerium oxide as a raw material.
Weigh a certain amount of cerium oxide and add concentrated HNO3 and H2O2 to dissolve it, prepare a 0.5mol/LCe(NO3)3 aqueous solution and add H2O2 and citric acid in a ratio of 1:1, slowly heating, the water will evaporate and form a gel , When it continues to heat to above 180℃, a large amount of brown aerogel is emitted and burned to form nano-CeO2 powder.
Choose appropriate solvents, dispersants, additives, surfactants and nano-CeO2 to mix the anti-fogging agent, and use the single factor optimization method to conduct experiments to obtain the best formula.
Luoyang Trunnano Tech Co., Ltd (TRUNNANO) is a professional cerium oxide powder with over 12 years experience in chemical products research and development. If you are looking for high quality cerium oxide powder, please feel free to contact us and send an inquiry.
