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以分散聚合法制备的聚苯乙烯(PS)微球为有机模板,以正硅酸四乙酯(C8H20O4Si)为无机前躯体物料,通过静电吸附作用成功地制备了纳米PS-SiO2复合微球和SiO2单分散空心结构。通过红外(FTIR)、热重(TG)、透射电镜(TEM)、扫描电镜(SEM)和热重分析仪(TGA)等手段对纳米复合材料进行了表征,并对产物的抗磨性能进行了测试。结果表明,该方法可一次性制备大量的复合微球,这些微球的直径约为0.7μm,分散性能良好。在煅烧去除模板后,得到了保持完整的空心纳米SiO2结构,微球的球壳稳定性较好。摩擦实验表明,添加了2 wt%空心微球的植物油在较低载荷工况下具有优异的减磨性能,摩擦系数可低至0.058。
Polystyrene (PS) microspheres prepared by the dispersion polymerization method were used as the organic template. The tetraethyl orthosilicate (C8H20O4Si) was used as the inorganic forebody to prepare the nano PS-SiO2 composite microspheres by electrostatic adsorption. SiO2 monodisperse hollow structure. The nanocomposites were characterized by FTIR, TG, TEM, TGA and other methods. The anti-wear properties of the products were characterized test. The results show that this method can prepare a large number of composite microspheres at one time. These microspheres have a diameter of about 0.7 μm and good dispersibility. After the template was calcined and removed, the hollow nano-SiO2 structure remained intact, and the stability of the spherical shell of the microsphere was good. Friction experiments showed that vegetable oil with 2 wt% hollow microspheres had excellent anti-wear performance under low load, and the friction coefficient could be as low as 0.058.