Impact of Ionic Liquid Additives and Inorganic Fullerene-Like Tungsten Disulfide on Friction and Wear under Aqueous Environments,Langmuir

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Impact of Ionic Liquid Additives and Inorganic Fullerene-Like Tungsten Disulfide on Friction and Wear under Aqueous Environments
Langmuir ( IF 3.7 ) Pub Date : 2022-06-14 , DOI: 10.1021/acs.langmuir.2c00620
Ayesha Asif ₁ , Ahmad Amiri ₁ , Hyun Jo Jun ₂ , Andreas A Polycarpou ₁

Affiliation

Aqueous lubricants are gaining attention due to significant advantages such as being environmentally friendly, tunable, and thermally stable. The oil and gas industry can use such additives to utilize in water-based fluids for applications where small sliding velocities and large lateral forces require enhanced lubrication. This investigation aims to compare the effects of two different additives: (i) inorganic fullerene-like tungsten disulfide (IF-WS₂) and (ii) an alkanolamine ionic liquid denoted as AA-IL. Both additives were paired with three different base fluids, deionized water (DIW), aqueous NaCl, and aqueous CaCl₂, to measure the impact on fluids commonly utilized in the field. The addition of IF-WS₂ to all three solutions resulted in a 30–60% decrease in the coefficient of friction (COF) and wear. Surface analysis by X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray spectroscopy (EDS) showed that the formation of a tribofilm (tungsten oxide layer) is primarily responsible for tribological improvements. The AA-IL did not show evidence of any chemical interaction. Instead, a physically bonded film of the AA-IL on the steel surface enabled the improved COF (40–50% reduction) and wear response. Both additives are effective in very small amounts and provide excellent wear and friction reduction properties.

中文翻译：

离子液体添加剂和无机类富勒烯二硫化钨对水环境下摩擦磨损的影响

由于环境友好、可调和热稳定等显着优势，水性润滑剂受到关注。石油和天然气工业可以使用此类添加剂在水基流体中用于小滑动速度和大侧向力需要增强润滑的应用。本研究旨在比较两种不同添加剂的效果：(i) 无机类富勒烯二硫化钨 (IF-WS ₂ ) 和 (ii) 表示为 AA-IL 的链烷醇胺离子液体。两种添加剂均与三种不同的基础流体（去离子水 (DIW)、NaCl 水溶液和 CaCl ₂水溶液）配对，以测量对该领域常用流体的影响。添加 IF-WS ₂这三种解决方案的摩擦系数 (COF) 和磨损均降低了 30-60%。通过 X 射线光电子能谱 (XPS) 和能量色散 X 射线光谱 (EDS) 进行的表面分析表明，摩擦膜（氧化钨层）的形成是摩擦学改进的主要原因。AA-IL 没有显示任何化学相互作用的证据。相反，钢表面上的 AA-IL 物理粘合膜能够改善 COF（减少 40-50%）和磨损响应。这两种添加剂在非常少量的情况下都有效，并提供出色的磨损和摩擦减少性能。

更新日期：2022-06-14

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