Fluorographene, a new alternative to graphene, it not only inherits the 2-dimensional (2D) layered structure and outstanding mechanical properties, but also possesses controllable C–F bonds. It is meaningful to reveal the evolution processes of the tribological behaviors from graphene to fluorographene. In this work, fluorinated reduced graphene oxide nanosheets (F–rGO) with different degree of fluorination were prepared using direct gas-fluorination and they were added into gas to liquid-8 (GTL-8) base oil as lubricant additive to improve the tribological performance. According to the results, the coefficient of friction (COF) reduced by 21%, notably, the wear rate reduced by 87% with the addition of highly fluorinated reduced graphene oxide (HF–rGO) compared with rGO. It was confirmed that more covalent C–F bonds which improved the chemical stability of HF–rGO resisted the detachment of fluorine so the HF–rGO nanosheets showed less damage, as demonstrated via X-ray photoelectron spectroscopy (XPS), Raman spectra, and transmission electron microscopy (TEM). Meanwhile, the ionic liquid (IL) adsorbed on HF–rGO successfully improved the dispersibility of F–rGO in GTL-8 base oil. The investigation of tribofilm by TEM and focused ion beam (FIB) illustrated that IL displayed a synergy to participate in the tribochemical reaction and increased the thickness of tribofilm during the friction process.

石墨烯是石墨烯的新替代品，它不仅继承了二维（2D）分层结构和出色的机械性能，而且还具有可控的CF键。揭示摩擦行为从石墨烯到氟代石墨烯的演化过程是有意义的。在这项工作中，使用直接气体氟化方法制备了具有不同氟化程度的氟化还原氧化石墨烯纳米片（F–rGO），并将其作为气体添加剂添加到了液态8（GTL-8）基础油中，改善了摩擦学性能。性能。根据结果​​，与rGO相比，添加高度氟化的还原氧化石墨烯（HF-rGO）可使摩擦系数（COF）降低21％，磨损率降低87％。已证实，通过X射线光电子能谱（XPS），拉曼光谱和拉曼光谱证实，更多的共价C-F键可改善HF-rGO的化学稳定性，可抵抗氟的分离，因此HF-rGO纳米片的损伤较小。透射电子显微镜（TEM）。同时，吸附在HF-rGO上的离子液体（IL）成功提高了F-rGO在GTL-8基础油中的分散性。TEM和聚焦离子束（FIB）对摩擦膜的研究表明，IL在摩擦过程中显示出参与摩擦化学反应的协同作用并增加了摩擦膜的厚度。HF-rGO上吸附的离子液体（IL）成功提高了F-rGO在GTL-8基础油中的分散性。TEM和聚焦离子束（FIB）对摩擦膜的研究表明，IL在摩擦过程中表现出参与摩擦化学反应的协同作用并增加了摩擦膜的厚度。HF-rGO上吸附的离子液体（IL）成功提高了F-rGO在GTL-8基础油中的分散性。TEM和聚焦离子束（FIB）对摩擦膜的研究表明，IL在摩擦过程中表现出参与摩擦化学反应的协同作用并增加了摩擦膜的厚度。