減摩抗磨潤(rùn)滑油添加劑的制備與摩擦學(xué)性能研究
[Abstract]:In the field of friction lubrication, the lubricating oil additive plays an important role, which is mainly used to improve the comprehensive performance of the base oil, such as reducing friction and wear and repairing the wear surface. The most commonly used additive is the antifriction and anti-wear lubricating oil additive. With the addition of additives, the quality of the lubricating oil and the antifriction and abrasion resistance are very large. But the traditional lubricating oil additives contain more sulfur, phosphorus, chlorine and other harmful environmental elements, which are difficult to meet the environmental requirements. Therefore, more and more domestic and foreign scholars have begun to seek new and environmentally friendly lubricating oil additives, including nitrogen containing borate and ionic liquids and micro nanoparticles as lubricating oil additives. In this paper, four kinds of organic nitrogen containing heterocyclic borates and a tetrafluoroborate ionic liquid were prepared by molecular design, and copper micron particles protected by polyvinylpyrrolidone (PVP) were prepared and the tribological properties of borate and ionic liquid and copper microparticles were investigated. We also prepared polytetrafluoroethylene (PTFE) particles filled with copper micron particles and SiO2 nanoparticles, and studied its antifriction and abrasion resistance in industrial white oil. Finally, the wear surface was analyzed by X ray photoelectron spectroscopy (XPS), and the lubrication mechanism of the lubricating oil additive was investigated. The contents and results are as follows: (1) study on the preparation and Tribological Properties of organic nitrogen heterocyclic borate and copper micron particles, four kinds of organic nitrogen heterocyclic borate BNH and Cu micron particles are synthesized by analytical design method and studied on the MR-S10B type four ball friction and wear testing machine as industrial white oil. The tribological properties of the agent were carried out by scanning electron microscope (SEM) and XPS analysis on the worn surface of the steel ball. The results showed that the four nitrogen heterocyclic borates and Cu microns had certain antifriction and anti-wear effects to a certain extent, and they had synergism between them. The lubrication mechanism was mainly composed of B2O3 and Fe2 on the lubricating surface. 03, Fe304, organic nitrogen compounds and other frictional chemical reaction films. (2) study on the preparation and Tribological Properties of functional ionic liquids and copper micron particles. A functional tetrafluoroborate ionic liquid [EAMIM]BF4 with antifriction and antiwear effects was prepared by the two step method. The ionic liquid was added to the ionic liquid by the four ball friction and wear tester. The tribological properties of Cu micron particles and the addition of these two additives in sunflower seed oil were added. XPS was used to analyze the state of the chemical elements on the worn surface and to analyze the mechanism of its lubrication. The results showed that the ionic liquid had good antifriction effect and had a certain synergistic effect with Cu micron particles, and XPS was analyzed for its moistening. The slippery mechanism is that the ionic liquid can make a complex friction chemical reaction with the metal and produce a layer of lubricating film composed of Cu, CuO, Fe203, Fe304, Fe2B and FeF3. In addition, the self repairing ability of Cu micron particles is also lubricated. (3) study on the preparation and Tribological Properties of PTFE filled with pre reduction oxidation and precipitation Cu micron particles and Si02 nanoparticles protected by PVP were prepared and filled into PTFE as filling agent, and the tribological properties of PTFE before and after filling were investigated with four ball friction machine. The study found that the PTFE after filling was better than the unfilled PTFE to reduce friction and wear resistance, and the XPS analysis of the worn surface was analyzed. The results show that the self repairing ability of the Cu micron particles and the chemical reaction of SiO2 with the metal surface to produce the oxides of silicon also play a certain role in lubrication in addition to the transfer film generated by the self lubrication effect of PTFE.
【學(xué)位授予單位】:西安科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TE624.82
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