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为了减少润滑液对石油的依赖,发展环境友好水基润滑液,本文通过在蒸馏水中加入螺旋藻、白葡萄球菌、寡核苷酸和丝素四种水溶性微粒来改善水的摩擦学特性.采用原子力显微镜和扫描电子显微镜对螺旋藻、白葡萄球菌、寡核苷酸和丝素进行结构表征;采用微摩擦试验仪对蒸馏水和四种水基润滑液摩擦性能进行了评价,采用流变仪对其流变性进行了评价.结果表明:1螺旋藻结构为螺旋状,白葡萄球菌为球状,寡核苷酸和丝素为线状;2螺旋藻的减摩效果最好,白葡萄球菌次之,最后是寡核苷酸和丝素;随着载荷增大蒸馏水摩擦系数减小,四种水基润滑液摩擦系数均增大;随着滑动速度增大摩擦系数均减小;3蒸馏水中添加微粒后仍为牛顿流体,但黏度增大.通过对机理进行分析,认为螺旋藻减摩效果最好是由于表面的螺旋结构能够产生足够大的滑动摩擦力,容易克服滚动阻力偶使微粒滚动起来;载荷增大四种水基润滑液摩擦系数均增大是微粒滚动阻力偶增大造成的;滑动速度增大四种水基润滑液摩擦系数均减小是微粒聚集体逐渐被分解造成的.
In order to reduce the dependence of lubricants on petroleum and to develop environment-friendly water-based lubricants, this paper improves the tribological properties of water by adding water-soluble particles of Spirulina, Staphylococcus aureus, oligonucleotides and silk fibroin in distilled water. The structure of spirulina, Staphylococcus aureus, oligonucleotide and silk fibroin were characterized by atomic force microscopy and scanning electron microscopy. The tribological properties of distilled water and four kinds of water-based lubricating fluids were evaluated by using a micro-friction tester. The results showed that: 1 Spirulina spiral structure, Staphylococcus aureus spherical, oligonucleotide and silk fibroin linear; Spirulina 2 best anti-friction effect, Staphylococcus aureus times , And finally the oligonucleotide and silk fibroin. The friction coefficients of the four kinds of water-based lubricating oil increased with the decrease of the friction coefficient of distilled water. The friction coefficient decreased with the increase of the sliding velocity. In the distilled water After adding the particles still Newtonian fluid, but the viscosity increases.By analyzing the mechanism, it is considered that the antifriction effect of Spirulina is best because the surface helical structure can generate enough large sliding friction force, which can easily overcome the rolling resistance The friction coefficient of the four kinds of water-based lubricating liquid increases with the increasing of the load, which is caused by the even increase of the rolling resistance of the particles; the friction coefficient of the four kinds of water-based lubricating fluids increases with the sliding speed decreasing, Caused by decomposition