超声辅助制备表面修饰纳米Ca_2B_6O_(11)及表征  

Ultrasound-Assisted Preparation and Characterization Surface Modified Nano-Ca_2B_6O_(11)

作　　者：丁士文[1] 徐向伟[1] 丁宇[1] 贾光[1] 王占辉[1] 

机构地区：[1]河北大学化学与环境科学学院,保定071002

出　　处：《无机化学学报》2012年第8期1575-1579,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.20806018)资助项目

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。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.

关 键 词：纳米材料 制备 硼酸钙 润滑油添加剂 超声辅助 

分 类 号：O485[理学—固体物理] O614.23[理学—物理]