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| 1 | Novel Approach for Improved Tribological Behavior of Biodiesel Soot in Liquid Paraffin显示文摘To improve the tribological behavior of biodiesel soot(BDS) in liquid paraffin(LP), the order of biodiesel soot was increased through thermally oxidized treatment at 500 ℃, and the oil solubility was then improved through a modification using oleylamine(OLA). The BDS and thermally oxidized oleylamine-modified BDS(T-BDS-OLA)were characterized through various methods including the use of TG, FETEM, Raman spectroscopy, FTIR, and a zeta potentiometer. The tribological properties and mechanisms of the BDS before and after the thermally oxidized treatment modification were investigated using a ball-on-disc reciprocating tribometer, FESEM, 3 D laser-scanning microscopy, and Raman spectroscopy. The results showed that T-BDS-OLA has a higher degree of order than the BDS, with an onion-like microstructure. BDS and T-BDS-OLA can both improve the antifriction and antiwear properties of LP at a soot content of 0.1%-0.4%, while T-BDS-OLA in LP shows better antifriction and antiwear properties than BDS. The tribological mechanisms can be attributed to both types of soot acting as spacing and roll bearing between the friction surfaces. In addition, the exfoliated graphitic sheets from T-BDS-OLA can form a carbon lubrication layer providing easy sliding. | Li Chuan Song Hui Zhang Jun Wu Bo Zhang Qiangqiang Zhuang Yuan Hu Xianguo | 2019 | China Petroleum Processing & Petrochemical Technology2019，21，1： | 3 |
| 2 | 煤间接液化柴油碳烟颗粒摩擦特性显示文摘煤间接液化柴油(F-T柴油)可直接应用在汽车发动机中,但其不完全燃烧产生的碳烟颗粒对发动机润滑系统的影响有待研究。本文在长时四球摩擦磨损试验机上研究F-T柴油碳烟(F-T DS)和0;柴油碳烟(DS)对10;白油摩擦学性能影响及其与传统抗磨添加剂的作用,并通过扫描电子显微镜(SEM)、X射线光电子能谱仪(XPS)等分析F-T DS、DS对10;白油的摩擦磨损机理。结果表明:随着10;白油中F-T DS与DS添加量的增加,平均摩擦系数(AFC)与钢球的平均磨斑直径(AWSD)均先降低后增加,当F-T DS添加量为1.0%(wt)时降到最低,此时AFC为0.071,AWSD为0.442 mm, DS也在浓度1.0%(wt)时AFC达到最小值0.075,AWSD达到最小值0.448 mm。当F-T DS与DS为2.5%(wt)时,AFC和AWSD急剧增加,并且都高于10;白油。在添加硫磷双辛伯烷基锌盐(T204)后,含2种碳烟的油品AWSD均明显减少,T204添加浓度为0.4%(wt)时,2种碳烟的AFC和AWSD均达到最小,此时AWSD分别降低为0.292、0.288 mm,分别减少35.4%和37.1%。机理分析表明:T204与碳烟形成复杂、具有抗磨减摩作用的摩擦膜,T204加量超过0.8%(wt)时,碳烟会和T204分解产生的磷酸盐在摩擦过程中形成磨粒,使磨粒磨损变得严重。 | 王建 刘天霞 康凯 秦建 | 2022 | 石河子大学学报(自然科学版)2022，40，3： | 0 |
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