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人们已对有机硼酸酯的减摩抗磨性能作了许多研究,但还很少见有含硫硼酸酯减摩抗磨性能之研究的文献报道.因此,合成了两种分子链烷基中含硫的有机硼酸酯,利用四球试验机和MHK-500型环-块试验机考察了它们添加到基础油(四球试验和环-块试验使用的基础油分别为液体石蜡和正十四烷)中的抗磨性能,以及十二胺对它们抗磨性能的影响,并用X射线光电子能谱仪对摩擦表面的元素组成和硼、硫元素的化学结合状态进行了分析,四球试验表明,含硫硼酸酯的承载能力比不含硫硼酸酯的更高;环-块试验表明,含硫硼酸酯的抗磨性能比不含硫硼酸酯的差.十二胺的加入能够明显提高含硫硼酸酯的承载能力和抗磨性能,X射线光电子能谱分析发现,在摩擦表面膜中硼是以降解的硼酸酯的形式存在,而硫则是以有机硫化物和FeSO4这两种形式存在;十二胺的加入降低了硫和硼在摩擦表面膜中的含量,其结果是提高了油品的抗磨性能和承载能力.
Many studies have been made on the antifriction and antiwear properties of organic boric esters. However, there are still few reports of studies on antifriction and antiwear properties of boric acid esters. Therefore, sulfur-containing organoborate esters of two molecular chain alkyl groups were synthesized and investigated using a four-ball tester and a MHK-500 ring-block tester for their addition to a base oil (four-ball test and ring-block test The base oils were liquid paraffin and n-tetradecane respectively), and the effect of dodecylamine on their anti-wear properties. The chemical composition of the tribological surface and the chemical composition of boron and sulfur were analyzed by X-ray photoelectron spectroscopy Four-ball tests showed that the bearing capacity of the boric acid ester was higher than that without the boric acid ester. The ring-block test showed that the abrasion resistance of the boric acid ester was lower than that of the boric acid ester The difference Addition of dodecylamine can obviously improve the carrying capacity and wear resistance of the boric acid ester. X-ray photoelectron spectroscopy analysis found that boron is present in the form of a degraded boric acid ester on the surface of the rubbing film while sulfur is With organic sulphide and FeSO4 both forms; dodecylamine added to reduce the content of sulfur and boron in the friction surface film, the result is to improve the oil abrasion resistance and load carrying capacity.