Effect of oleic acid modified GO-LaF3 on lubrication characteristics of 10# white oil

IF 1.8 4区工程技术 Q3 ENGINEERING, CHEMICAL Lubrication Science Pub Date : 2024-04-04 DOI:10.1002/ls.1700

Tianxia Liu, Jian Qin, Jian Wang, Jing Li, Jinyu Liu

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Abstract

To study the synergistic lubricating effects of graphene oxide (GO) and lanthanum fluoride (LaF₃), and find a new anti-wear additive, oleic acid surface-modified graphene oxide-lanthanum fluoride (OA-GO-LaF₃, OGL) composite nano-additive was prepared by hydrothermal method by using oleic acid as the modifier. The morphology, structure, composition, element valence, thermal stability and tribological properties of nano additives were characterised by a series of modern characterisation methods. Results show that OGL has a higher degree of graphitization, smaller particle size, more homogeneous disperse, higher LaF₃ load and stronger thermal stability than that of GL. The tribological properties of OGL which is modified by oleic acid are better than unmodified GL. Analysis of the friction mechanism shows that both OGL and GL can generate LaF₃ physical adsorption films through adsorption during the friction process and tribochemical reactions film containing lanthanum compounds, carbon oxide compounds, and iron oxide compounds on the friction surface. These physical adsorption films and chemical reaction film can improve lubrication.

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油酸改性 GO-LaF3 对 10# 白油润滑特性的影响

为了研究氧化石墨烯（GO）和氟化镧（LaF3）的协同润滑作用，寻找一种新型抗磨添加剂，以油酸为改性剂，采用水热法制备了油酸表面改性氧化石墨烯-氟化镧（OA-GO-LaF3，OGL）复合纳米添加剂。通过一系列现代表征方法对纳米添加剂的形态、结构、组成、元素价、热稳定性和摩擦学性能进行了表征。结果表明，与 GL 相比，OGL 具有更高的石墨化程度、更小的粒度、更均匀的分散性、更高的 LaF3 负荷和更强的热稳定性。经油酸改性的 OGL 的摩擦学性能优于未改性的 GL。摩擦机理分析表明，OGL 和 GL 都能在摩擦过程中通过吸附生成 LaF3 物理吸附膜，并在摩擦表面生成含有镧化合物、氧化碳化合物和氧化铁化合物的摩擦化学反应膜。这些物理吸附膜和化学反应膜可改善润滑效果。

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来源期刊

Lubrication Science ENGINEERING, CHEMICAL-ENGINEERING, MECHANICAL

CiteScore

3.60

自引率

10.50%

发文量

审稿时长

6.8 months

期刊介绍： Lubrication Science is devoted to high-quality research which notably advances fundamental and applied aspects of the science and technology related to lubrication. It publishes research articles, short communications and reviews which demonstrate novelty and cutting edge science in the field, aiming to become a key specialised venue for communicating advances in lubrication research and development. Lubrication is a diverse discipline ranging from lubrication concepts in industrial and automotive engineering, solid-state and gas lubrication, micro & nanolubrication phenomena, to lubrication in biological systems. To investigate these areas the scope of the journal encourages fundamental and application-based studies on: Synthesis, chemistry and the broader development of high-performing and environmentally adapted lubricants and additives. State of the art analytical tools and characterisation of lubricants, lubricated surfaces and interfaces. Solid lubricants, self-lubricating coatings and composites, lubricating nanoparticles. Gas lubrication. Extreme-conditions lubrication. Green-lubrication technology and lubricants. Tribochemistry and tribocorrosion of environment- and lubricant-interface interactions. Modelling of lubrication mechanisms and interface phenomena on different scales: from atomic and molecular to mezzo and structural. Modelling hydrodynamic and thin film lubrication. All lubrication related aspects of nanotribology. Surface-lubricant interface interactions and phenomena: wetting, adhesion and adsorption. Bio-lubrication, bio-lubricants and lubricated biological systems. Other novel and cutting-edge aspects of lubrication in all lubrication regimes.

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