Synergistic tribological effect between polyisobutylene succinimide-modified molybdenum oxide nanoparticle and zinc dialkyldithiophosphate for reducing friction and wear of diamond-like carbon coating under boundary lubrication

Chen, Shuoshuo; Song, Ningning; Zhang, Shengmao; Zhang, Yujuan; Yu, Laigui; Zhang, Pingyu

doi:10.1007/s40544-022-0708-4

Cited by 15 publications

(5 citation statements)

References 42 publications

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“…Dynamic light scattering (DLS) and UV spectral studies showed that minimal aggregation of the carbon nanoparticles in n -decane is observed at a PIB-SI concentration of 5 wt%, which correlates with the optimized formulations for Group III and IV engine oils. An amphiphilic nature of PIB-SI was used in surface-capping of MoO 3 ; the nanoparticles modified with zinc dialkyldithiophosphate [ 150 ] demonstrated a synergistic tribological effect, reduced friction and caused wear in the diamond-like carbon coating under boundary lubrication.…”

Section: Further Transformations Of Hrpib (Pib-cl) and Applications O...mentioning

confidence: 99%

Polyisobutylenes with Controlled Molecular Weight and Chain-End Structure: Synthesis and Actual Applications

et al. 2023

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The polymerization of isobutylene allows us to obtain a wide spectrum of polyisobutylenes (PIBs) which differ in their molecular weight characteristics and the chemical structure of chain-end groups. The bulk of the PIBs manufactured worldwide are highly reactive polyisobutylenes (HRPIBs) with –C(Me)=CH2 end-groups and low-molecular weights (Mn < 5 kDa). HRPIBs are feedstocks that are in high demand in the manufacturing of additives for fuels and oils, adhesives, detergents, and other fine chemicals. In addition, HRPIBs and CMe2Cl-terminated PIBs are intensively studied with the aim of finding biomedical applications and for the purpose of developing new materials. Both chain control (molecular weight and dispersity) and chemoselectivity (formation of exo-olefinic or –CMe2Cl groups) should be achieved during polymerization. This review highlights the fundamental issues in the mechanisms of isobutylene polymerization and PIB analysis, examines actual catalytic approaches to PIBs, and describes recent studies on the functionalization and applications of HRPIBs and halogen-terminated PIBs.

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Section: Further Transformations Of Hrpib (Pib-cl) and Applications O...mentioning

confidence: 99%

Polyisobutylenes with Controlled Molecular Weight and Chain-End Structure: Synthesis and Actual Applications

et al. 2023

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“…They experienced reduced friction and wear on a diamond-like carbon coating during their study. During their surface analysis, they revealed some of the tribochemical reactions in the boundary layer, thereby demonstrating the fundamental operation of ZDDP and the transformation of MoO3 [35].…”

Section: Introductionmentioning

confidence: 98%

“…Despite this, nanoparticles with high thermal stability can reduce the coefficient of friction [28]. As Chen [35] did, to understand the entire operation, it is necessary to look in detail at the reactions in the boundary layer.…”

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confidence: 99%

Tribological Investigation of the Effect of Nanosized CuO and TiO2 on a Base Oil Containing Komad 323 Dispersant

Szabó,

Marsicki,

Hargitai

2023

Preprint

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In this article, copper(II) oxide and titanium dioxide nanoparticles were added to Group III base oil formulated with 8 wt% Komad 323 dispersant. The nanoparticles were treated with ethyl oleate surface modification. The tribological properties of the homogenized oil samples were tested on a linear oscillating tribometer with continuous monitoring of static friction. Friction absolute integral values were calculated from high data acquisition. The wear was evaluated using a digital optical and confocal microscope. The wear types were characterized with scanning electron microscopy, while the remaining additives were located and quantified with energy-dispersive X-ray spectroscopy. The measurement results show that the CuO nanoparticles did not work well with the Komad 323 dispersant. As a result of their antagonistic effect, in the case of low CuO concentrations (≤0.3 wt%), the friction increased, while in the case of high concentrations (≥0.4%), surface fatigue caused a high wear rate. The cooperation between TiO2 and the dispersant showed synergistic effects. The oxygen-rich boundary layer formed on the worn surface with a titanium content of 0.33-0.39 norm.wt% provides both lower friction and high wear resistance.

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“…The metal/metal oxide nanoparticles, a kind of typical extreme-pressure antiwear additives, tend to form the chemical reaction film under high load resistance. , Despite their excellent properties, the dispersion stability of nanoparticles in lubricating oils remains a thorny issue, which directly affects the performance and lifespan of the lubricant. Chemically modified metal/metal oxide nanoparticles used as lubricating oil additives often show defects such as complicated processes, short life, and even environmental pollution. ,, Another typical extreme-pressure antiwear agent is an organic additive containing N, S, P, Cl, and other elements, such as zinc dialkyldithiophosphate (ZDDP); , however, ZDDP also has some disadvantages that cannot be ignored, such as bad smell and an unfriendly environment . Therefore, it is extremely important to prepare a highly dispersed, environmentally friendly, and nontoxic antiwear agent.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Carbon Nanospheres with Encapsulated (Bi)Metallic Nanocrystals as Lubricant Additives for Antiwear and Friction Reduction

Liu,

Hu,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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Herein, the novel core−shell organo-inorganic hybrid carbon nanospheres with encapsulated ultrafine bimetal nanocrystals were successfully prepared by a one-pot domino drive synthesis combined with postcarbonization. The excellent properties of the metals such as high strength and thermal conductivity are retained, and the poor dispersion of the metal in the oil could be improved by encapsulating the metal in organic−inorganic hybrid carbon nanospheres. The vanadium and wolframium nanocrystals embedded in nitrogen-doped carbon nanospheres (V/W@NCNs) manifested remarkable oil dispersity on account of the lipophilic organic phase of the carbon shell. It is worth noting that the as-obtained V/W@NCNs display better tribological properties compared with the base oil, such as a higher extreme pressure of 1250 N, a lower friction coefficient of about 0.09, and a significant reduction in wear volume of 91.5%, which are attributed to the robust protective film that was formed on the surface of the friction pair through mechanical deposition and physical and tribochemical reaction during the friction process.

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Synergistic tribological effect between polyisobutylene succinimide-modified molybdenum oxide nanoparticle and zinc dialkyldithiophosphate for reducing friction and wear of diamond-like carbon coating under boundary lubrication

Cited by 15 publications

References 42 publications

Polyisobutylenes with Controlled Molecular Weight and Chain-End Structure: Synthesis and Actual Applications

Polyisobutylenes with Controlled Molecular Weight and Chain-End Structure: Synthesis and Actual Applications

Tribological Investigation of the Effect of Nanosized CuO and TiO2 on a Base Oil Containing Komad 323 Dispersant

Hybrid Carbon Nanospheres with Encapsulated (Bi)Metallic Nanocrystals as Lubricant Additives for Antiwear and Friction Reduction

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