Copper (II) oxide nanoparticles as additve in engine oil to increase the durability of piston-liner contact

Asnida, M.; Hisham, Sakinah; Awang, Normah; Amirruddin, A. K.; Noor, M. M.; Kadirgama, K.; Najafi, G.; Tarlochan, Faris

doi:10.1016/j.fuel.2017.10.002

Cited by 84 publications

(37 citation statements)

References 56 publications

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“…Nanosized fillers possess some distinctive effects in surface, volume, quantum dimension, and macroscopic quantum tunneling and thus exhibit properties that those with macroscopic size do not have . The fraction of coordination unsaturated atoms markedly increases when the particle size of fillers decreases, and thus the nanofillers with much higher specific surface area and surface energy than its micron‐sized counterpart can strongly interact with the matrix and achieve an enhanced interface combination . This enables the nanocomposite to possess excellent mechanical and tribological properties even at a low loading of nanofillers.…”

Section: Introductionmentioning

confidence: 99%

“…Cupric oxide (CuO) can be synthesized conveniently and its nanoparticles are found more excellent properties in wear resistance and friction reduction than other nanoparticles, such as alumina, zirconia, iron (Fe), and cobalt (Co) . CuO nanoparticles showed a huge potential in tribology when it was added into base oil and polymer matrices . Asnida et al .…”

Section: Introductionmentioning

confidence: 99%

“…Asnida et al . added CuO nanoparticles into base oil and found that CuO nanoparticles particles can be attached to the friction surface to provide a protective layer for the inner surface of the engine . Yang et al .…”

Section: Introductionmentioning

confidence: 99%

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In situ fabrication of CuO/UHMWPE nanocomposites and their tribological performance

Cao

Shi

Yan

et al. 2019

J of Applied Polymer Sci

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Polymer nanocomposites present remarkably enhanced mechanical and tribological properties with respect to their matrices even at a low loading of nanofillers. Here, cupric oxide (CuO) nanoparticles (nano-CuO) were in situ filled into ultra-high-molecularweight polyethylene (UHMWPE) to inhibit a possible agglomeration encountered in the preparation by mechanical mixing. The filled CuO nanoparticles were highly dispersed in UHMWPE with a reliable interface combination. The CuO nanoparticles in the matrix play a role for heterogeneous nucleation, resulting in an enhancement in degree of crystallinity of UHMWPE. The elastic modulus and the elongation at break of the nanocomposites also presented an improvement, indicating a good compatibility between the nano-CuO and the matrix. The average sliding friction coefficient of UHMWPE against 45 # steel was reduced by up to 34% after the in situ filling of CuO nanoparticles, and the wear mechanism was found to transform from adhesive to fatigue wear after the introduction of nano-CuO. It is concluded that the in situ filling can improve the dispersion of CuO nanoparticles in UHMWPE, and markedly promote the mechanical properties and tribological performance of UHMWPE.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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In situ fabrication of CuO/UHMWPE nanocomposites and their tribological performance

Cao

Shi

Yan

et al. 2019

J of Applied Polymer Sci

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“…In most of the studies carried out, it is noted that the addition of NPs to the lubricant can increase its tribological characteristics, which largely depend on the composition of the lubricant [39,47,[52][53][54][55][56][57][58].…”

Section: Composition Of Metal-containing Nanolubricantsmentioning

confidence: 99%

Metal-containing nanomaterials as lubricant additives: State-of-the-art and future development

2019

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This review focuses on the effect of metal-containing nanomaterials on tribological performance in oil lubrication. The basic data on nanolubricants based on nanoparticles of metals, metal oxides, metal sulfides, nanocomposities, and rare-earth compounds are generalized. The influence of nanoparticle size, morphology, surface functionalization, and concentration on friction and wear is analyzed. The lubrication mechanisms of nanolubricants are discussed. The problems and prospects for the development of metal-containing nanomaterials as lubricant additives are considered. The bibliography includes articles published during the last five years. Friction 7(2): 93-116 (2019) | https://mc03.manuscriptcentral.com/friction Friction 7(2): 93-116 (2019) 97 |www.Springer.com/journal/40544 | Friction http://friction.tsinghuajournals.comFriction 7(2): 93-116 (2019)

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“…Copper oxide nanoparticles (CuO-NPs) have gained a lot of attention for industrial applications due to their beneficial optical, electrical and thermal properties [1][2][3][4]. They are frequently applied as catalysts or additives [5][6][7][8] as well as for medical purposes due to their high antimicrobial potential [9]. Copper-containing NPs are generated and released not only into the outdoor environment during welding [10] or from anti-fouling paints [11], but also in indoor environments from household electric appliances like vacuum cleaners [12].…”

Section: Introductionmentioning

confidence: 99%

Iron-Doping of Copper Oxide Nanoparticles Lowers Their Toxic Potential on C6 Glioma Cells

et al. 2020

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Copper oxide nanoparticles (CuO-NPs) are well known for their cytotoxicity which in part has been attributed to the release of copper ions from CuO-NPs. As iron-doping has been reported to reduce the susceptibility of CuO-NPs to dissolution, we have compared pure CuO-NPs and CuO-NPs that had been doped with 10% iron (CuO-Fe-NPs) for copper release and for their toxic potential on C6 glioma cells. Physicochemical characterization revealed that dimercaptosuccinate (DMSA)-coated CuO-NPs and CuO-Fe-NPs did not differ in their size or zeta potential. However, the redox activity and liberation of copper ions from CuO-Fe-NPs was substantially slower compared to that from CuO-NPs, as demonstrated by cyclic voltammetry and by the photometric quantification of the copper ion-bathocuproine complex, respectively. Exposure of C6 cells to these NPs caused an almost identical cellular copper accumulation and each of the two types of NPs induced ROS production and cell toxicity. However, the time-and concentration-dependent loss in cell viability was more severe for cells that had been treated with CuO-NPs compared to cells exposed to CuO-Fe-NPs. Copper accumulation and toxicity after exposure to either CuO-NPs or CuO-Fe-NPs was prevented in the presence of copper chelators, while neutralization of the lysosomal pH by bafilomycin A1 prevented toxicity without affecting cellular copper accumulation or ROS production. These data demonstrate that iron-doping does not affect cellular accumulation of CuO-NPs and suggests that the intracellular liberation of copper ions from CuO-NPs is slowed by the iron doping, which in turn lowers the cell toxic potential of iron-doped CuO-NPs.

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Copper (II) oxide nanoparticles as additve in engine oil to increase the durability of piston-liner contact

Cited by 84 publications

References 56 publications

In situ fabrication of CuO/UHMWPE nanocomposites and their tribological performance

In situ fabrication of CuO/UHMWPE nanocomposites and their tribological performance

Metal-containing nanomaterials as lubricant additives: State-of-the-art and future development

Iron-Doping of Copper Oxide Nanoparticles Lowers Their Toxic Potential on C6 Glioma Cells

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