核壳型硼酸钙／SiO2复合微球的制备及摩擦学性能研究  

Synthesis and Tribological Properties of Core-shell Calcium Borate/SiO_2 Composites

作　　者：纪献兵[1] 陈银霞[1] 杜庆丽 

机构地区：[1]中国环境管理干部学院,河北秦皇岛066102 [2]山东省外贸职业学院,山东泰安271000

出　　处：《润滑与密封》2015年第4期58-60,64,共4页Lubrication Engineering

基　　金：中国科学院兰州化学物理研究所固体润滑国家重点实验室开放项目(1109);河北省科技厅科技支撑计划项目(12273610);秦皇岛科技局科技计划项目(201401A023;201401A039);中国环境管理干部学院院级自然科学基金项目(2014007);中国环境管理干部学院博士启动基金项目(B2014007;B2014008)

摘　　要：以硼砂、硝酸钙和正硅酸乙酯为原料,在温和条件下制备核壳型硼酸钙/Si O2复合微粒。利用透射电镜(TEM)、X射线衍射(XRD)和红外光谱(FT-IR)研究复合微球的结构,发现Si O2包覆于硼酸钙的表面。将油酸修饰的复合微粒分散于液体石蜡中,利用四球摩擦试验机在载荷392 N、转速1 450 r/min、时间30 min的条件下考察其摩擦学性能。结果表明,该复合微粒具有良好的摩擦学性能,其中质量分数1.0%的复合微粒可使液体石蜡的磨斑直径从0.7 mm降低到0.5 mm,摩擦因数从0.09降低到0.05。含硼酸钙/Si O2复合微粒的液体石蜡润滑时,磨痕表面生成含B、Fe和Si的摩擦膜,从而起到减摩抗磨的作用。Core-shell calcium borates/SiO2 composites were synthesized by a facile way, using borax, calcium nitrate and tetraethoxysilane （TEOS） as row materials. The structure and morphologies of calcium borate were investigated by TEM, XRD and FT-IR, finding that SiO2 shell was covered on the calcium borates. The oil acid （OA） modified compos- ites were mixed into liquid paraffin and the tribological properties of the oleic acid modified calcium carbonates were evaluated on four-ball tester at 392 N load, 1 450 r/rain for 30 min. The results show that the composites possess excellent tri- bological properties. The wear scare diameter is decreased from 0. 7 mm to 0. 5 mm and the friction coefficient is dropped from 0. 09 to 0. 05 as 1.0% composites are added into base oil. The wonderful friction reducing and anti-wear properties of calcium borates/SiO2 composites are attributed to the formation of tribological film containing B, Fe and Si on the worn surface.

关 键 词：硼酸钙 复合微粒 摩擦学性能 添加剂 

分 类 号：TH117.1[机械工程—机械设计及理论]