石墨烯纳米片作为润滑剂添加剂：性质和尺寸对润滑性能的影响。
Graphene Nanosheets as Lubricant Additives: Effects of Nature and Size on Lubricating Performance.
作者信息
Huo Lixia, Guo Jinshan, Hu Hanjun, Zhang Kaifeng, Zhou Hui, Liu Peng
机构信息
State Key Laboratory of Applied Organic Chemistry and Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
Key Laboratory of Science and Technology on Vacuum Technology and Physics, Lanzhou Institute of Physics, Lanzhou 730010, Gansu, China.
出版信息
Langmuir. 2022 Aug 9;38(31):9678-9685. doi: 10.1021/acs.langmuir.2c01322. Epub 2022 Jul 27.
Graphene has been widely investigated as an additive in lubricating oils to enhance their tribological performance. Here, the effects of the nature and size of the graphene nanosheets on the tribological performance were investigated with the hydrogenated hydroxyl-terminated polybutadiene dioctoate (O-HHTPB-O) as a model base oil after alkylation of the graphene oxide (GO) of different sizes with 1-dodecylamine (DA) and reduction. The 1-dodecylamine-modified graphene oxide (DA-GO) showed better dispersibility in the O-HHTPB-O base oil and subsequently better tribological performance than the reduced one (DA-rGO) for both the larger graphene oxide nanosheets (GO) and the smaller graphene oxide nanosheets (GO). The DA-GO exhibited better wear-reduction performance than the DA-GO, owing to its smaller size and higher polarity. Although the DA-GO could be ground during the friction, the friction and wear in the original period affected the complete period lubricating performance.
石墨烯作为润滑油添加剂以提高其摩擦学性能已得到广泛研究。在此，以氢化羟基封端的聚丁二烯二辛酸酯（O-HHTPB-O）为模型基础油，研究了不同尺寸的氧化石墨烯（GO）经1-十二胺（DA）烷基化和还原后得到的石墨烯纳米片的性质和尺寸对摩擦学性能的影响。对于较大尺寸的氧化石墨烯纳米片（GO）和较小尺寸的氧化石墨烯纳米片（GO），1-十二胺改性的氧化石墨烯（DA-GO）在O-HHTPB-O基础油中表现出更好的分散性，进而摩擦学性能优于还原后的产物（DA-rGO）。由于其尺寸更小且极性更高，DA-GO比DA-rGO表现出更好的减磨性能。尽管DA-GO在摩擦过程中可能会被磨碎，但初期的摩擦和磨损会影响整个周期的润滑性能。
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