Tribological performances of highly dispersed graphene oxide derivatives in vegetable oil

Zhang, Gangqiang; Xu, Yong; Xiang, Xianzheng; Zheng, Ganlin; Zeng, Xiangqiong; Li, Zhipeng; Ren, Tianhui; Zhang, Yadong

doi:10.1016/j.triboint.2018.05.004

Cited by 89 publications

(35 citation statements)

References 40 publications

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“…The friction coefficient is the lowest at the same testing time when the concentration of RSOPE reaches 2.0 wt%, which indicates that RSOPE can impart good friction properties of W-EG solution. The finding confirms the results of the four-ball experiment [26,27].…”

Section: Antiwear and Friction-reducing Performancesupporting

confidence: 90%

Tribological Behavior of Plant Oil-Based Extreme Pressure Lubricant Additive in Water-Ethylene Glycol Liquid

Ding¹,

Yang²,

Xu³

et al. 2019

Journal of Renewable Materials

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A water-soluble lubricant additive (RSOPE) was prepared by esterification reaction using fatty acid from rubber seed oil. The RSOPE was added into water-ethylene glycol (W-EG) solution as lubricant additive. Dispersion stability and rheological properties were investigated. We used a four-ball tribotester to assess the lubrication performance of W-EG based fluid with the RSOPE additive. The stainless-steel surface was analyzed using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Good dispersion stability was observed in the RSOPE/W-EG solutions. Furthermore, non-Newtonian fluid behavior at low shear rates and Newtonian fluid behavior at high shear rates was exhibited. The addition of RSOPE into water-glycol reduced the friction coefficients (COF) and wear scar diameters (WSD). The maximum nonseizure loads (PB) increased from 98 N to 752 N and the W-EG solution with RSOPE had good corrosion resistance properties. Good tribological performances for W-EG solution with RSOPE were attributed to the boundary tribofilm composed of iron oxide, iron phosphide and so on.

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Section: Antiwear and Friction-reducing Performancesupporting

confidence: 90%

Tribological Behavior of Plant Oil-Based Extreme Pressure Lubricant Additive in Water-Ethylene Glycol Liquid

Ding¹,

Yang²,

Xu³

et al. 2019

Journal of Renewable Materials

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“…This phenomenon was due to the oxidation of BDS, which increased the amount of hydrophilic functional groups in NA-BDS [31], and stabilized the material in H 2 O. As indicated by Figure 5b, the mean particle size decreased from 200.5 nm (between 122.4 and 396.1 nm for BDS in LP) to 130.4 nm (between 68.1 and 295.3 nm for NA-BDS-OLA in LP), which is ascribed to the introduction of functional groups with high lipophilicity on the surface of NA-BDS-OLA [33]. These results agree well with the FTIR measurements.…”

Section: Resultsmentioning

confidence: 99%

Novel Carbon Nanoparticles Derived from Biodiesel Soot as Lubricant Additives

Wang

et al. 2019

Nanomaterials

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The objective of this study was to investigate the roles and tribological mechanisms of onion-like carbon nanoparticles derived from biodiesel soot (BDS) when applied in water (H2O) and liquid paraffin (LP). In this study, we prepared nitric acid-treated BDS (NA-BDS) as an additive to H2O and NA-BDS modified with oleylamine (NA-BDS-OLA) as an additive to LP. Raman spectroscopy, field-emission transmission electron microscopy, Fourier transform infrared spectroscopy, and zeta potentiometry were used to characterize the results of the nitric acid treatment and oleylamine modification. The tribological behaviors and corresponding mechanisms of the new onion-like carbon nanoparticles were evaluated using a ball-on-disc reciprocating tribometer, as well as field-emission scanning electron microscopy, three-dimensional laser scanning microscopy, and Raman spectroscopy. The results indicated that the additives NA-BDS and NA-BDS-OLA, which were onion-like carbon nanoparticles with sizes ranging from 35 to 40 nm, enhanced the antiwear and friction reduction properties of H2O and LP, respectively. Through tribo-mechanisms, these types of soot can serve as spacers and ball bearings between the rubbing surfaces. Moreover, exfoliation under a high load as a result of the formation of a graphitic layer facilitates easy shearing.

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“…Through the generation of a GO-adsorption film on the contact surfaces, GO can separate the contact surfaces and reduce the wear (Wu et al, 2018;Zhao et al, 2018). However, the macroscale COFs of GO are generally in the range of 0.02-0.1 (Meng et al, 2015;Jaiswal et al, 2016;Fan et al, 2018;Wu et al, 2018;Zhang et al, 2018;Zhao et al, 2018), indicating a near-superlubricity state or traditional lubrication state.…”

Section: Nanomaterial-based Lubricantsmentioning

confidence: 99%

Macroscale Superlubricity Achieved With Various Liquid Molecules: A Review

Luo

2019

Front. Mech. Eng.

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Superlubricity is generally classified as solid superlubricity and liquid superlubricity according to the lubricants involved at the interfaces, and is a popular research topic in tribology, which is closely linked to energy dissipation. Significant advancements in both experimental studies and theoretical analysis have been made regarding superlubricity in the past two decades. Compared with solid superlubricity, liquid superlubricity has many advantages; e.g., it is more easily achieved at the macroscale and less sensitive to the surface smoothness and atmospheric conditions. In the present study, the advancements in liquid superlubricity at the macroscale are reviewed, and the corresponding mechanisms for various types of liquid lubricants are discussed. This investigation is important for engineering traditional mechanical lubricating systems. Finally, the issues regarding the liquid superlubricity mechanism and the future development of liquid superlubricity are addressed.

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Tribological performances of highly dispersed graphene oxide derivatives in vegetable oil

Cited by 89 publications

References 40 publications

Tribological Behavior of Plant Oil-Based Extreme Pressure Lubricant Additive in Water-Ethylene Glycol Liquid

Tribological Behavior of Plant Oil-Based Extreme Pressure Lubricant Additive in Water-Ethylene Glycol Liquid

Novel Carbon Nanoparticles Derived from Biodiesel Soot as Lubricant Additives

Macroscale Superlubricity Achieved With Various Liquid Molecules: A Review

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