硼氮化大豆油对菜籽油生物降解性和润滑性的影响

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

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。

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.