Enhanced lubrication by core-shell TiO2 nanoparticles modified with gallic acid ester

Hong, Frank T.; Schneider, Ameneh; Sarathy, S. Mani

doi:10.1016/j.triboint.2020.106263

Cited by 23 publications

(12 citation statements)

References 42 publications

(7 reference statements)

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“…At the same time, the agglomeration phenomenon could destroy the continuity of the oil film, leading to the direct contact of the surface asperities and acute adhesive wear (Scheme a). When GLM nanodroplets are dispersed evenly in the lubricant and form a layer of nanofluids, abrasive and adhesive wear is significantly reduced by the formation of GLM nanodroplets’ protective film (oxides of Ga, In, Fe, and ferrous sulfide) (Scheme b). , Moreover, the modification of DDP not only enhances the dispersibility and boosts the antioxidant properties of GLMs but also optimizes the tribological performance and load-carrying capacity by forming the FeS and FePO 4 protective film.…”

Section: Resultsmentioning

confidence: 99%

Dialkyl Dithiophosphate-Functionalized Gallium-Based Liquid-Metal Nanodroplets as Lubricant Additives for Antiwear and Friction Reduction

Liu

Zhao

et al. 2020

ACS Appl. Nano Mater.

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The escalation in industrial demand and environmental concerns has necessitated the development of high-performance nanoadditivesthe driving force behind advanced lubricating oil used in engineered systems. Herein, dialkyl dithiophosphate (DDP)-functionalized gallium-based liquid-metal (GLM) nanodropletsDDP@GLMs, were prepared with an average size of about 178 nm and used as effective lubricant additives for tribological properties such as friction and wear reduction. Polydopamine-coated GLM nanodroplets (PDA@GLMs) can simply be prepared by means of sonication of liquid metal in bulk in Tris aqueous solution of dopamine, followed by modification by a commercial lubricating additive (DDP) via Michael addition. The DDP@GLMs exhibited exceptional stability in poly(alphaolefin) (PAO) base oil and remained stable for more than 5 days. The tribological properties of DDP@GLM additives were evaluated under varied conditions. It can be seen that the as-obtained DDP@GLMs demonstrated remarkable friction reduction and wear resistance abilities while operating as lubricating additives. The high load-carrying property is seen reaching a value as high as 1050 N with the frictional coefficient befalling less than 0.1 and the corresponding wear volume loss being decreased by 96%. The tribological properties seem attributable to the formation of a protective film (oxides of Ga, In, Fe, ferrous sulfide, and iron phosphate) on the interfaces of friction pairs. This study establishes a reliable basis for simple preparation of functional GLM nanodroplets and the manner of their implementation as lubrication additives.

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Section: Resultsmentioning

confidence: 99%

Dialkyl Dithiophosphate-Functionalized Gallium-Based Liquid-Metal Nanodroplets as Lubricant Additives for Antiwear and Friction Reduction

Liu

Zhao

et al. 2020

ACS Appl. Nano Mater.

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“…(3) nanoparticles polish the contact surface and decrease the surface roughness, and (4) nanoparticles protect the contacting surfaces by providing a stable tribo-film [7]. Nano lubricants are mainly used in the turbine meter to reduce friction and wear in bearings.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of TiO2 and MWCNTs turbine meter oil nanofluids: Flow and hydrodynamic properties

Sarvari

Heris

Mohammadpourfard

et al. 2022

Fuel

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“…Zhang et al synthesised TiO 2 NPs and modified them with stearic acid to improve their dispersion ability in base oil 11 . Hong et al modified TiO 2 NPs with 2‐octyldodecyl gallic acid ester and the resulting products showed high dispersion stabilities in base oils 12 …”

Section: Introductionmentioning

confidence: 99%

Bisurfactant‐functionalized TiO₂ nanoparticles as additives of the lubricating oil

Wang

2022

Lubrication Science

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In this work, TiO 2 nanoparticles modified with octadecylamine and dodecyl mercaptan (DDM/ODA@PDA@TiO 2 NPs) are uesd to improve the tribological properties of the white oil. The DDM/ODA@PDA@TiO 2 NPs which are simply prepared by mussel inspired chemistry and the Michael addition reaction can be facilely dispersed in the white base oil. Tribological measurements showed that the dispersion of the white oil containing 3 wt% DDM/ODA@PDA@TiO 2 NPs displays significant reductions in the friction coefficient and wear scar diameter at room temperature and 75 C. Further XPS investigation shows that the favourable tribological properties of DDM/ODA@PDA@TiO 2 NPs are ascribed to the synergistic effect of tribofilm

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Enhanced lubrication by core-shell TiO2 nanoparticles modified with gallic acid ester

Cited by 23 publications

References 42 publications

Dialkyl Dithiophosphate-Functionalized Gallium-Based Liquid-Metal Nanodroplets as Lubricant Additives for Antiwear and Friction Reduction

Dialkyl Dithiophosphate-Functionalized Gallium-Based Liquid-Metal Nanodroplets as Lubricant Additives for Antiwear and Friction Reduction

Numerical investigation of TiO2 and MWCNTs turbine meter oil nanofluids: Flow and hydrodynamic properties

Bisurfactant‐functionalized TiO₂ nanoparticles as additives of the lubricating oil

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Enhanced lubrication by core-shell TiO2 nanoparticles modified with gallic acid ester

Cited by 23 publications

References 42 publications

Dialkyl Dithiophosphate-Functionalized Gallium-Based Liquid-Metal Nanodroplets as Lubricant Additives for Antiwear and Friction Reduction

Dialkyl Dithiophosphate-Functionalized Gallium-Based Liquid-Metal Nanodroplets as Lubricant Additives for Antiwear and Friction Reduction

Numerical investigation of TiO2 and MWCNTs turbine meter oil nanofluids: Flow and hydrodynamic properties

Bisurfactant‐functionalized TiO2 nanoparticles as additives of the lubricating oil

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Product

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Bisurfactant‐functionalized TiO₂ nanoparticles as additives of the lubricating oil