| 超声辅助制备表面修饰纳米Ca2B6O11及表征 |
| Ultrasound-Assisted Preparation and Characterization Surface Modified Nano-Ca2B6O11 |
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| 摘要: 纳米材料的制备及其应用于润滑油摩擦性能研究，对于改善油品的性能和延长设备的使用寿命具有重要的意义。首次采用超声辅助法合成了球型、粒径分布均匀的纳米硼酸钙润滑油添加剂并对其进行了表征。XRD结合热分析发现样品在室温下为非晶态，750 ℃结晶，且原料配比对晶态没有影响。SEM和TEM分析证明在超声波辅助下可以得到50 nm的超微粒子，而不用超声波的样品粒径为200~300 nm。在超声和搅拌下将2%的添加剂均匀分散在润滑油中，得到成品油。静置观察评价了润滑油的分散性和稳定性。在重负荷车辆与工业齿轮油中试验检验了润滑油的的润滑性能。结果表明，纳米硼酸钙添加剂具有良好的分散性、稳定性和抗磨减摩性能。 |
| 关键词: 纳米材料 制备 硼酸钙 润滑油添加剂 超声辅助 |
| 基金项目: |
| Abstract: The preparation and application in lubricating oil of nanomaterials is of significance to improve the performance of oil and extend the mechanical service life. In this paper, the uniform and well-dispersed spherical calcium borate nanoparticles as lubricating oil additives have been prepared by ultrasound-assisted method for first time, and characterized by XRD, SEM, TEM and TG/DTA. The XRD and TG/DTA results show that the samples exist in amorphous state at room temperature and crystalline at 750 ℃. The ratio of raw materials has no effect on the crystal phase. SEM and TEM images indicate that the calcium borate particles with diameters of 50 nm and 200~300 nm can be synthesized with and without ultrasound-assisted method, respectively. The product oil can be obtained by dispersing 2% of additives into lubricating oil under ultrasonication and agitation. The dispersion and stability of lubricants were characterized by standing observation. The performance of lubrication oil was examined by heavy-duty vehicles and industrial gear oil test. The results show that the as-obtained nanosized calcium borate additive exhibit excellent dispersion, stability and anti-wear friction properties. |
| Keywords: nanomaterials preparation calcium borate lubricating oil additive ultrasonic assistance |
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| 丁士文,徐向伟,丁 宇,贾 光,王占辉.超声辅助制备表面修饰纳米Ca2B6O11及表征[J].无机化学学报,2012,28(8):1575-1579. |
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