Influence of Glyceryl Monostearate Adsorption on the Lubrication Behavior of a Slider Bearing

IF 3.1 3区工程技术 Q2 ENGINEERING, MECHANICAL

Lubricants Pub Date : 2024-02-23 DOI:10.3390/lubricants12030067

Qiaoni Xu, Zhaogang Jing, Shijie Du, Feng Guo, Ruitao Mu

引用次数: 0

Abstract

Glyceryl monostearate (GMS) was used as an organic friction modifier (OFM) and added to the base oil (PAO10, polyα-olefin) in this study. The film thickness and friction coefficient of the base oil added with GMS (PAO10G) under different slider inclinations and loads were investigated experimentally by using a slider-on-disc contact lubricant film measurement system, and the effect of the adsorption of GMS on the friction behavior of lubricant was studied. Contact angle hysteresis (CAH) was used to evaluate the wettability of the solid–liquid interface, and its correlation with the coefficient of friction was analyzed. The results show that CAH is in good agreement with the wettability of the solid–liquid interface. Compared with the base oil, the wettability of POA10G is weak, which can effectively reduce the coefficient of friction. However, different from the classical lubrication theory, the film thickness of PAO10G is higher than that of PAO10; this unusual phenomenon is preliminarily explained by the interface slippage in this paper.

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单硬脂酸甘油酯吸附对滑动轴承润滑行为的影响

本研究采用甘油单硬脂酸酯 (GMS) 作为有机摩擦改进剂 (OFM)，并将其添加到基础油（PAO10，聚α-烯烃）中。使用滑块-圆盘接触式润滑油膜测量系统对添加了 GMS 的基础油（PAO10G）在不同滑块倾角和载荷下的油膜厚度和摩擦系数进行了实验研究，并研究了 GMS 的吸附对润滑油摩擦行为的影响。利用接触角滞后（CAH）评估了固液界面的润湿性，并分析了其与摩擦系数的相关性。结果表明，CAH 与固液界面的润湿性非常吻合。与基础油相比，POA10G 的润湿性较弱，可有效降低摩擦系数。然而，与经典润滑理论不同的是，PAO10G 的油膜厚度高于 PAO10；本文用界面滑移初步解释了这一异常现象。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Lubricants Engineering-Mechanical Engineering

CiteScore

3.60

自引率

25.70%

发文量

293

审稿时长

11 weeks

期刊介绍： This journal is dedicated to the field of Tribology and closely related disciplines. This includes the fundamentals of the following topics: -Lubrication, comprising hydrostatics, hydrodynamics, elastohydrodynamics, mixed and boundary regimes of lubrication -Friction, comprising viscous shear, Newtonian and non-Newtonian traction, boundary friction -Wear, including adhesion, abrasion, tribo-corrosion, scuffing and scoring -Cavitation and erosion -Sub-surface stressing, fatigue spalling, pitting, micro-pitting -Contact Mechanics: elasticity, elasto-plasticity, adhesion, viscoelasticity, poroelasticity, coatings and solid lubricants, layered bonded and unbonded solids -Surface Science: topography, tribo-film formation, lubricant–surface combination, surface texturing, micro-hydrodynamics, micro-elastohydrodynamics -Rheology: Newtonian, non-Newtonian fluids, dilatants, pseudo-plastics, thixotropy, shear thinning -Physical chemistry of lubricants, boundary active species, adsorption, bonding