A Study of Water-Based Nanolubricants Using Hexagonal Boron Nitride (hBN)-Based Nanocomposites as Lubricant Additives

IF 3.1 3区工程技术 Q2 ENGINEERING, MECHANICAL

Lubricants Pub Date : 2024-04-06 DOI:10.3390/lubricants12040123

A. Morshed, Hui Wu, Mengyuan Ren, Zhao Xing, S. Jiao, Zhengyi Jiang

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Abstract

An Rtec ball-on-disk tribometer was used to investigate the tribological performance of the synthesised water-based nanolubricants containing hBN/TiO2 nanocomposite at room temperature. The water-based nanolubricants with different concentrations were prepared by adding glycerol and sodium dodecyl benzene sulfonate (SDBS) under ultrasonication. These as-prepared nanolubricants demonstrated exceptional dispersion stability for 7 days without distinct sedimentation. The results indicate that the water-based nanolubricants with an overall concentration of 1.0 wt% at different ratios (hBN: TiO2 = (1:0), (0.7:0.3), (0.5:0.5), (0.3:0.7), (0:1)) can effectively reduce the coefficient of friction (COF) and the wear of the ball and disk. In particular, the water-based nanolubricant containing 0.5 wt% hBN and 0.5 wt% TiO2 exhibited the best tribological performance, leading to a significant reduction in COF up to 70%, and decreased the wear area of the ball and disk by up to 79.57% and 60.40%, respectively, compared to those obtained using distilled water. The lubrication mechanisms were mainly attributed to the formation of a protective film, and the mending, polishing, rolling, and synergistic effects of the hBN nanosheets and TiO2 nanoparticles.

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使用六方氮化硼 (hBN) 纳米复合材料作为润滑油添加剂的水基纳米润滑剂研究

使用 Rtec 盘上球摩擦仪研究了含有 hBN/TiO2 纳米复合材料的合成水基纳米润滑剂在室温下的摩擦学性能。不同浓度的水基纳米润滑剂是通过在超声波中加入甘油和十二烷基苯磺酸钠（SDBS）制备的。这些制备的纳米润滑剂在 7 天内表现出优异的分散稳定性，无明显沉淀。结果表明，总浓度为 1.0 wt%、不同比例（hBN：TiO2 = (1:0)、(0.7:0.3)、(0.5:0.5)、(0.3:0.7)、(0:1))的水基纳米润滑剂可有效降低摩擦系数 (COF) 以及球和盘的磨损。其中，含 0.5 wt% hBN 和 0.5 wt% TiO2 的水基纳米润滑剂的摩擦学性能最佳，与使用蒸馏水相比，COF 显著降低达 70%，球和盘的磨损面积分别减少达 79.57% 和 60.40%。润滑机制主要归因于保护膜的形成，以及 hBN 纳米片和 TiO2 纳米颗粒的修补、抛光、滚动和协同作用。

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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