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The Study on Synthesis of Copper Borate Nanoparticles and Its Ability of Antifriction

Author: LiuZhiHui
Tutor: JiangFuMing
School: Jilin University
Course: Inorganic Chemistry
Keywords: Copper borate Silica Coated Antifriction
CLC: TB383.1
Type: Master's thesis
Year: 2008
Downloads: 122
Quote: 4
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In recent years, with the development of the automobile industry, the lubricant must have good fuel economy. From this viewpoint, it has been a lot of research of the energy saving lubricating oil, mainly by adding a friction modifier to reduce friction. At the same time, improve the friction and lubrication properties of the material, not only the machinery and equipment needed to meet the modern scientific and technological progress to high-speed, heavy load and high-precision direction, but also can extend the life of machinery and equipment, energy saving and environmental protection great significance. In this thesis, the development of chemically prepared nano-nano-boric acid copper technology, various control methods and a new synthetic route different morphologies of nanomaterials. Through systematic research work, many valuable conclusions and innovative results. Nanoparticles with a small size effect, surface area effect many conventional materials do not have the special nature of these special properties make nanomaterials with a wide range of application areas. Nanoparticles as lubricant additives has attracted the interest of many scientists, how to improve the stability of the nanoparticles in the lubricant, compatibility, research in this area has become a hot and difficult. Nano additives used to improve lubricant performance and has made some progress. Further develop the Nanoparticles used in lubricating oil the antifriction performance studies, has important implications for improving the performance of oil and extend the life of the equipment. Borax and copper sulfate, as main raw materials, by a simple liquid phase method, the first step in situ preparation of a hydrophobic crystalline copper borate nanosheet. With oleic acid as a surface modifying agent, reducing the surface of the copper borate nanoparticles can improve the miscibility between the base oil. The oleic acid is a cheap unsaturated organic acid containing two functional groups of the carboxyl group and the carbon-carbon double bond. Achieved through the control of the growth conditions in the synthesis process, the morphology control of the nanoparticles, the hydrophobicity of the copper borate nanosheet having a diameter of 100nm to 200 nm, a thickness of approximately 15nm. Wherein the pH of the reaction system, the ratio of the reactants and reaction time on the product of the hydrophobicity of the impact of very large. By thermogravimetric and infrared spectrum showed that is rich in oleic acid in the carboxyl group and the surface of the copper borate. Hydroxyl key cooperation with, the oleic acid is grafted on the surface of the copper borate particles, the contact angle of the hydrophobic copper borate up to 112O. The hydrophobicity of the copper borate is added into the base oil, because of its good dispersion in the base oil, it significantly reduces the coefficient of friction of the base oil, and the fluctuations in the friction coefficient is very small. In recent years, with the development of nanotechnology, composite materials because of its potential value, has attracted wide interest of the scientific community. Composites nanoparticles represent a class of the new structural unit constituted by two different components and structural materials. Such materials compared to the counterparts with their single components, and generally has improved physical and chemical properties, can create the versatility of the composite nano particles. Meanwhile, the composite material of the magnetic, optical, mechanical, electrical, friction, and the catalytic performance can be achieved by controlling the structure, size and composition of the composite material particles. As far as we know, so far no synthetic the boric copper / silica composite nanoparticles reported. We first direct ball through the self-assembled in situ depositing a thin layer of dense silica the surface of the copper borate. Composite particles of silica in the shell is an amorphous state exists, having a mono-dispersed and a smooth surface, having a diameter of approximately 30nm. Innerlayer copper borate in the presence of multi-crystalline. The length of the copper borate about 1000nm, and a diameter of about 100nm, and adds it to the base oil, not been able to effectively reduce the friction coefficient of the base oil.

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