Fortified Lubricating Response to Sustainable PEG System from Protic Ionic Liquid and Their Strong Hydrogen Bonding Network,ACS Sustainable Chemistry & Engineering

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Fortified Lubricating Response to Sustainable PEG System from Protic Ionic Liquid and Their Strong Hydrogen Bonding Network
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2024-03-22 , DOI: 10.1021/acssuschemeng.4c00798
Fan Xu ₁ , Bingyu Tian ₁ , Kun Cui ₁ , Mengyao Liu ₁ , Yingying Yao ₁ , Haolin Li ₂ , Rui Dong _{1,

3,

4} , Mingjin Fan ₁ , Meirong Cai ₃ , Feng Zhou _{3,

4} , Weimin Liu _{3,

4}

Affiliation

As a hydrophilic polyether molecule, polyethylene glycol has environmentally friendly, degradable, and compatibility characteristics, gradually becoming a potential choice for green lubrication. Two novel multifunctional protic ionic liquids (ILs) were synthesized, and an ILs-PEG200 lubrication system was constructed with a strong hydrogen bonding network structure. The determination of rheological properties and boundary lubrication states inspired us to consider the interaction between polar additives and systems. Surprisingly, an extremely stable run-in period was obtained by the high efficiency adsorption contributed from high-polarity ILs at the sliding interface in the initial shear stage. Meanwhile, the ILs-PEG200 lubrication system also has superior load carrying and antishear properties, as well as remarkable lubrication stability even under very high loads, showing certain potential for engineering applications. In addition, the lubrication mechanism was obtained by exploring the interaction among ILs, PEG system, and metal surface, and the results revealed that tribo-oxidation reactions, physical/chemical adsorption, and tribochemical reactions occurred on the metal asperity during shear. Therefore, a tribofilm containing metal phosphates and sulfides is generated through the occurrence of tribochemical reaction and the synergistic effect of the base system, metal interface, and functional additives. The protic ILs lubrication additives in this work can significantly enhance the tribological performance of poly(ethylene glycol) systems under harsh conditions, providing a theoretical basis for its development in the engineering field.

中文翻译：

质子离子液体及其强氢键网络对可持续 PEG 系统的强化润滑响应

聚乙二醇作为亲水性聚醚分子，具有环保、可降解、相容等特点，逐渐成为绿色润滑的潜在选择。合成了两种新型多功能质子离子液体（ILs），并构建了具有强氢键网络结构的ILs-PEG200润滑体系。流变特性和边界润滑状态的确定激发我们考虑极性添加剂和系统之间的相互作用。令人惊讶的是，在初始剪切阶段，由于高极性离子液体在滑动界面处的高效吸附，获得了极其稳定的磨合期。同时，ILs-PEG200润滑系统还具有优异的承载和抗剪切性能，即使在极高载荷下也具有出色的润滑稳定性，显示出一定的工程应用潜力。此外，通过探索ILs、PEG体系和金属表面之间的相互作用，获得了润滑机理，结果表明剪切过程中金属粗糙体上发生了摩擦氧化反应、物理/化学吸附和摩擦化学反应。因此，通过摩擦化学反应的发生以及基础体系、金属界面和功能添加剂的协同作用，生成含有金属磷酸盐和硫化物的摩擦膜。该工作中的质子离子液体润滑添加剂可以显着增强聚乙二醇体系在恶劣条件下的摩擦学性能，为其在工程领域的发展提供理论基础。

更新日期：2024-03-22

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