硼氮化大豆油对菜籽油生物降解性和润滑性的影响

通过对大豆油进行化学改性,合成了2种硼氮化添加剂BNS-1和BNS-2,研究了BNS-1和BNS-2对菜籽油生物降解性和润滑性的影响;通过扫描电镜和能谱仪分析了磨损表面的形貌及元素组成。结果表明:BNS-1和BNS-2可提高菜籽油的极压性能,具有较好的抗磨减摩性能,BNS-2的减摩效果优于BNS-1,BNS-1的抗磨效果优于BNS-2;BNS-1和BNS-2对菜籽油的生物降解性影响较小。硼氮化添加剂的润滑机理是硼元素的缺电子性,氮的高反应活性,在摩擦高温条件下,硼与氮发生化学反应,形成化学反应膜,从而提高了基础油摩擦学性能。

INFLUENCE OF BORON AND NITROGEN MODIFIED SOYBEAN OIL ON BIODEGRADABILITY AND LUBRICITY OF RAPESEED OIL

To synthesize two Boron and Nitrogen-containing soybean oil additive (abbreviated as BNS-1 and BNS-2), boron and nitrogen were introduced into the soybean oil molecules through chemical modification. The influence of BNS-1 and BNS-2 on biodegradability and lubricity of rapeseed oils were studied. The morphologies and chemical species of the worn surfaces were investigated by scanning electron microscope (SEM) with an energy dispersive spectrometer (EDS). The results showed that BNS-1 and BNS-2 had little influence on the biodegradability of rapeseed oil. They possessed good anti-wear and friction-reducing properties, as well as extreme pressure properties. The friction-reducing properties of BNS-2 were better than those of BNS-1, however, its anti-wear properties were worse than BNS-1. The mechanism is that the electron-deficiency boron reacts with high reaction active nitrogen element at high temperature from friction, forming tribo chemical films, resulting in improved tribological properties.