【摘要】 为了获得减摩性优良的纳米铜润滑油,采用自制的油幕喷淋循环电爆装置并添加不同浓度的分散剂丁二酸二异辛酯原位合成纳米铜润滑油,以提高纳米铜颗粒的分散性。采用紫外-可见分光光度计、静置沉降法、X射线衍射仪和透射电镜分析了纳米铜颗粒的分散稳定性能;采用磨损试验评价了纳米铜润滑油的减摩性能;采用扫描电镜观察了盘基体的磨痕形貌。结果表明:纳米铜颗粒的分散稳定性能随丁二酸二异辛酯浓度的增大呈先增大后减少的变化规律,当分散剂浓度为3%时,纳米铜润滑油悬浮液吸光度最大,沉降率最小,分散稳定性能较好,同时其摩擦系数最小,钢球的磨斑直径最小,减摩性能较好。更多还原

【Abstract】 In order to obtain nano-copper lubricating oil with excellent anti-friction property,an electrical explosion device with self-made oil curtain spray was used to prepare nano-copper lubricating oil,and the dioctyl succinate with different concentrations was added for enhancing the dispersibility of the nano-copper particles. The dispersion stability of the nano-copper lubricating oil was characterized by ultra-violet and visible spectrophotometer,precipitation method,X-ray diffraction and transmission electron microscopy. The wear tests were used to evaluate the anti-friction property of nano-copper lubricating oil. The morphology of the worn surface of the disk substrate was characterized by scanning electron microscopy. Results showed that the dispersion stability firstly ascended and then descended as the volume fraction of dioctyl succinate rose. When the volume fraction of dioctyl succinate was 3%,the nano-copper lubricating oil achieved the maximum absorbance,the minimum sedimentation rate,the best dispersion stability and the lowest friction coefficient. Meanwhile, the spot diameter of grindingballs was minimum and the nano-copper lubricant oil showed the best anti-friction property.更多还原