Self-assembly of ceria/graphene oxide composite films with ultra-long antiwear lifetime under a high applied load

Bai, Guoying; Wang, Jinqing; Yang, Zhigang; Wang, Honggang; Wang, Zhaofeng; Yang, Shengrong

doi:10.1016/j.carbon.2014.11.063

Cited by 36 publications

(12 citation statements)

References 51 publications

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“…In particular, the paraffin oil filled with CeO2/GO/CNTs-d nanocomposites displayed excellent tribological properties. This can be explained by the fact that the two-dimensional lamellar structure of GO, the one-dimensional tubular CNTs, and the zero-dimensional spherical CeO2 were uniformly compounded and achieved the synergistic lubrication effect [42] that the improvement of tribological properties of CeO2/GO/CNTs-d nanocomposites was far superior to the single-component nanomaterials. Considering the effect of different weight ratios of CeO2, GO, and CNTs in the nanocomposite on the friction properties of paraffin oil, the tribological behaviors of CeO2/GO/CNTs nanocomposites with a content of 1 wt% in paraffin oil were investigated as lubricant additives in pure paraffin oil.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, 1 wt% CeO2/GO/CNTs-d nanocomposites were the most suitable concentration, which makes the corresponding paraffin oil possess excellent friction resistance. The excellent lubricating performance was attributed to the perfect combination of the laminated GO nanosheets and the ball-bearing CeO2 and CNTs [41][42][43]. In order to obtain the appropriate content of CeO 2 /GO/CNTs-d nanocomposites as a lubricant additive that improves the friction resistance of paraffin oil, the tribological performance of paraffin oil with different contents of CeO 2 /GO/CNTs-d nanocomposites were investigated, as shown in Figure 8a,b.…”

Section: Resultsmentioning

confidence: 99%

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Fabrication of Novel CeO2/GO/CNTs Ternary Nanocomposites with Enhanced Tribological Performance

Min

Song

et al. 2019

Applied Sciences

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Increasing demands of multi-functional lubricant materials with well distributed nanoparticles has been generated in the field of oil lubrication. In this study, one-dimensional (1-D) acidified multi-walled carbon nanotubes (CNTs) and two-dimensional (2-D) graphene oxide (GO) sheets were dispersed together under an ultra-sonication condition to form CNTs/GO hybrids and the corresponding CNTs/GO hybrids decorated with uniform zero-dimensional (0-D) cerium oxide (CeO2) nanoparticles were prepared via a facile hydrothermal method. The tribological performance of CeO2/CNTs/GO ternary nanocomposite was systematically investigated using a MS-T3000 ball-on-disk tester. The results demonstrated that CeO2/GO/CNTs nanocomposites can effectively reduce the friction of sliding pairs in paraffin oil. Moreover, the oil with 1 wt% of CeO2/GO/CNTs exhibited the best lubrication properties with the lowest friction coefficient and wear scar diameters (WSD) compared with adding only GO nanosheet, CeO2, and CeO2/CNTs hybrid nanocomposite as lubricant additives. It is concluded that due to the synergistic effect of 0D CeO2, 1D CNTs, and 2D GO during sliding process, a dimensionally mixed CeO2/GO/CNTs nanocomposite exhibits excellent lubricating properties, providing innovative and effective additives for application in the field of lubrication.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Fabrication of Novel CeO2/GO/CNTs Ternary Nanocomposites with Enhanced Tribological Performance

Min

Song

et al. 2019

Applied Sciences

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“…[58].Li et al investigated and compared three different structures: titanium substrate, APTES-SAM, and GO-APTES nanolayer. The modifications changed the wettability, adhesion, and friction forces of the final structures (Figure 18) [59].…”

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confidence: 99%

“…SEM images of the wear scars on the steel balls sliding against (a) APTES-GO and (b) CeO 2 /GO composite film. (c) Variation of kinetic friction coefficient with time for different samples under an applied load of 2 N and a constant speed of 10 mm/s (1 Hz) ( figure image reprinted from Ref [58]…”

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confidence: 99%

Applications of Graphene Modified by Self-Assembled Monolayers

Ersü¹,

Gokpek²,

Can³

et al. 2020

Advances in Condensed-Matter and Materials Physics - Rudimentary Research to Topical Technology

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Self-assembled monolayers (SAMs) are well-oriented molecular structures that are formed by the adsorption of an active site of a surfactant onto a substrate's surface. Aromatic SAMs were used to modify anode/hole transport layer interface in order to achieve preferable barrier alignment and charge carrier injection from anode to an organic-based thin film material. Other functions of SAMs include current blocking layers or moisture penetration blocking layers, dipolar surface layers for enhanced charge injection, and modification of work function of a material such as graphene acting as a spacer to physically separate and electrically decouple it from the substrate. Additionally, SAM modification of graphene leads to its electronic passivation at layers' edges, elimination of defects, and enhanced adhesion and stability. The surface modification with molecules capable of forming SAM is a fast, simple, low-cost, and effective technique for the development of novel materials especially for the production of electronic devices. The ability to modify its properties by SAM technique has opened up a wide range of applications in electronic and optoelectronic devices.

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“…The unusual friction mechanics of graphene oxide is attributed to the intrinsic mechanical anisotropy which is inherently stiff in plane but remarkably flexible out of plane [31], or it contains many surface regions that tend to wear more easily than graphene [14].The main tribological mechanism of GO additives in water [34,35], ionic liquid [36], oleic acid [37], esterified bio-oil [38] was observed to be a thin film of GO sheets on the counter ball surface forming a lubricating layer and binding water molecules into contact. The development of a polymer/graphene, graphene oxide or graphite composite coating, improved the friction and wear behavior which were considered to be the result of the formation of uniform transfer film and the spalling of abrasive debris [39][40][41][42][43][44][45][46][47]. The friction force pattern was used as the fingerprint to reveal the frictional anisotropy on graphite surface [48][49][50][51][52] and weak interplanar van der Waals interactions between planes of graphite are considered to be the origin of its low friction coefficient.…”

mentioning

confidence: 99%

Friction and Wear Behaviour of Polyester Nanocomposites with Graphene Oxide and Graphite Investigated Through Block-on-ring Test

Bastiurea¹,

Dima²,

Hadăr³

et al. 2018

Rev. Chim.

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A new class of polyester nanocomposites with graphene oxide and graphite has been obtained through a specific chemical method. Aiming to assess the tribological performance of this type of material, a basic experimental plan has been conceived which includes block-on-ring test, wear rate measurement, Vickers micro hardness test and scanning electron microscopy. Accordingly, the influence of graphene oxide and graphite on coefficient of friction and friction stability were investigated through wear test of nanocomposite blocks against steel rings. At the same time, specific wear rate was inferred in order to examine the mass loss which is strongly dependent on surface micro hardness. After wear test, SEM analysis allowed identification of the transfer film between nanocomposite surface and steel counterpart, and the occurrence of the third body. A careful examination of the friction coefficient recordings has highlighted the effect of the contact condition during the dry sliding test.

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Self-assembly of ceria/graphene oxide composite films with ultra-long antiwear lifetime under a high applied load

Cited by 36 publications

References 51 publications

Fabrication of Novel CeO2/GO/CNTs Ternary Nanocomposites with Enhanced Tribological Performance

Fabrication of Novel CeO2/GO/CNTs Ternary Nanocomposites with Enhanced Tribological Performance

Applications of Graphene Modified by Self-Assembled Monolayers

Friction and Wear Behaviour of Polyester Nanocomposites with Graphene Oxide and Graphite Investigated Through Block-on-ring Test

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