高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (5): 987-994.doi: 10.7503/cjcu20190668

• 研究论文:无机化学 • 上一篇    下一篇

改性生物柴油碳烟的制备、表征及水基润滑特性

李川1,*(),王新运1,吴凤义1,刘天霞2,胡献国3,*()   

  1. 1. 巢湖学院化学与材料工程学院, 合肥 238000
    2. 北方民族大学化学与化学工程学院, 银川 750021
    3. 合肥工业大学机械工程学院, 合肥 230009
  • 收稿日期:2019-12-14 出版日期:2020-05-10 发布日期:2020-01-15
  • 通讯作者: 李川,胡献国 E-mail:lichuan2008hf@126.com;xghu@hfut.edu.cn
  • 基金资助:
    国家自然科学基金(51675153);安徽高校自然科学研究重点项目(KJ2019A0678);巢湖学院博士科研启动基金(KYQD-202001);巢湖学院校级科研项目(XLZ-201907)

Preparation, Characterization and Water-based Lubricity of Modified Biodiesel Soot

LI Chuan1,*(),WANG Xinyun1,WU Fengyi1,LIU Tianxia2,HU Xianguo3,*()   

  1. 1. School of Chemistry and Material Engineering, Chaohu University, Hefei 238000, China
    2. College of Chemistry and Chemical Engineering, North Minzu University, Yinchuan 750021, China
    3. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China
  • Received:2019-12-14 Online:2020-05-10 Published:2020-01-15
  • Contact: Chuan LI,Xianguo HU E-mail:lichuan2008hf@126.com;xghu@hfut.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(51675153);the Anhui Province University Natural Science Research Project, China(KJ2019A0678);the Doctor Start-up Foundation of Chaohu University, China(KYQD-202001);the School-level Scienti?c Research Projects of Chaohu University, China(XLZ-201907)

摘要:

为了探索生物柴油碳烟(BDS)作为水基润滑添加剂的应用, 采用热氧化法制备了热氧化处理的BDS(TO-BDS); 通过场发射透射电子显微镜、 X射线光电子能谱仪和Zeta电位仪等表征了TO-BDS的形貌、 组成和分散性, 并与BDS进行了对比; 利用球-盘往复摩擦磨损试验机、 3D激光扫描显微镜、 场发射扫描电子显微镜、 光学法接触角/界面张力仪和拉曼光谱仪考察了含TO-BDS的纯水(H2O)的摩擦磨损性能和润滑机理. 结果表明, TO-BDS表面的含氧官能团和负电荷比BDS更多, 从而导致TO-BDS在H2O中具有更好的分散性; 在H2O中添加质量分数为0.2%的TO-BDS, 可显著改善H2O的减摩抗磨性能. 这主要是因为在摩擦过程中, TO-BDS起到滚动轴承的功效, H2O+TO-BDS比H2O在摩擦副表面的润湿性能更好, 更易于形成润滑膜且TO-BDS会因摩擦力诱导剥离产生石墨片, 从而降低摩擦磨损.

关键词: 生物柴油, 碳烟, 热氧化, 润滑, 添加剂

Abstract:

In order to realize the utilization of biodiesel soot(BDS) as lubricant additives in water, thermally oxidized biodiesel soot(TO-BDS) was prepared by thermal oxidation. The morphology, composition and dispersion of TO-BDS were analyzed by field-emission transmission electron microscopy, X-ray photoelectron spectroscopy and zeta potentiostat, and compared with that of BDS. The tribological properties and the lubricant mechanism of TO-BDS as an additive in water were investigated using a ball-on-disc reciprocating tribometer, 3D laser scanning microscopy, field-emission scanning electron microscopy, optical contact angle/interface tension meter and Raman spectrometer. Results indicate that the oxygen-containing functional groups and negative charges of TO-BDS are more than that of BDS, which leads to better dispersion of TO-BDS in water compared with BDS in water. The anti-friction and anti-wear properties are significantly improved after adding 0.2%(mass fraction) TO-BDS in water. The main reason is that TO-BDS can act as bearing during friction process and water containing TO-BDS is more facile than water to form lubricating film because the friction pairs are more wettable for water containing TO-BDS in comparison with water. Besides, it also can reduce friction and wear due to friction induced the exfoliating graphitic sheets of TO-BDS.

Key words: Biodiesel, Soot, Thermal oxidation, Lubricity, Additive

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