Mechanical and tribological performance of polyamide 12 reinforced with graphene nanoplatelets and paraffin oil nanocomposites

2019 ◽  
Vol 50 (1) ◽  
pp. 74-85 ◽  
Author(s):  
A. E. M. Hassan ◽  
A. I. EiD ◽  
M. El-Sheikh ◽  
W.Y. Ali
Keyword(s):  
Tribological Performance ◽  
Graphene Nanoplatelets ◽  
Polyamide 12 ◽  
Paraffin Oil

Tribological studies of some SAPS-free Schiff bases derived from 4-aminoantipyrine and aromatic aldehydes and their synergistic interaction with borate ester

2014 ◽  
Vol 2 (27) ◽  
pp. 10424-10434 ◽  
Author(s):  
Vinay Jaiswal ◽  
Kalyani Kalyani ◽  
Rashmi B. Rastogi ◽  
Rajesh Kumar
Keyword(s):  
Schiff Bases ◽  
Aromatic Aldehydes ◽  
Tribological Performance ◽  
Synergistic Interaction ◽  
Metal Free ◽  
Paraffin Oil ◽  
Borate Ester

Tribological performance of sulfur, phosphorous and metal-free Schiff bases and their synergistic formulations with borate ester in paraffin oil has been evaluated using a four-ball tester at optimized concentrations (1% w/v).

Fabrication and tribological behavior of novel UHMWPE/vitamin-C/graphene nanoplatelets based hybrid composite for joint replacement

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Omar Hussain ◽  
Shahid Saleem Sheikh ◽  
Babar Ahmad
Keyword(s):  
Composite Materials ◽  
Vitamin C ◽  
Human Serum ◽  
Hybrid Composite ◽  
Wear Behavior ◽  
Tribological Performance ◽  
Graphene Nanoplatelets ◽  
Morphological Examination ◽  
Content Type ◽  
Weight Percentage

Purpose This study aims to fabricate and investigate the tribological performance of ultra-high molecular weight polyethylene (UHMWPE)-based composite materials reinforced with 0.5, 1 and 2 weight percentage of graphene nanoplatelets (GNPs) while keeping the weight percentage of vitamin C constant at 2% for each composite. Design/methodology/approach In this paper, the composites were fabricated using hot pressing, and the dispersion of GNP/vitamin C/UHMWPE hybrid composite was investigated by X-ray diffraction. Experimental trials were performed according to ASTM F732 on a reciprocating sliding tribometer (pin-on-disc) at human body temperature of 37 ± 1 °C, for a load of 52 N, to assess the role of these fillers on the tribological properties of UHMWPE against Ti6Al4V counter body material under dry and lubricating (human serum) environment. Findings In this study, it has been observed that friction and wear behavior of the developed composites improve with increase in weight percentage of GNP, and human serum adheres to the surface of the composite pins upon sliding, resulting in the formation of a film, which results in better wear resistance of the composite pins under human serum lubrication than dry sliding. Scanning electron microscope was used to investigate the worn surface morphological examination of the composite materials. Specific wear rate of 0.76 × 10−7 mm3/Nm was attained for 2 Wt.% GNP-filled composite under human serum lubrication. Practical implications The results indicate the compatibility of the composite material used in this study and suggested the in vitro implant application. Originality/value The presented work includes novel study of synergistic effect of GNP (which acts as a solid lubricant) and vitamin C (added as an antioxidant) on the tribological performance of UHMWPE under dry and human serum lubrication.

Pristine and Alkylated MoS2 Nanosheets for Enhancement of Tribological Performance of Paraffin Grease Under Boundary Lubrication Regime

2019 ◽  
Vol 141 (7) ◽  
Author(s):  
Sooraj S. Rawat ◽  
A. P. Harsha ◽  
Deepak P. Agarwal ◽  
Sangita Kumari ◽  
Om P. Khatri
Keyword(s):  
Coefficient Of Friction ◽  
Tribological Performance ◽  
Wear Volume ◽  
Mos2 Nanosheets ◽  
Lubricating Grease ◽  
Metal Soap ◽  
Paraffin Oil ◽  
Lubrication Regime ◽  
The Coefficient Of Friction ◽  
Worn Surface

In the present study, lubricating grease was developed with paraffin oil and 12-lithium hydroxy stearate metal soap as a thickening agent. MoS2 nanosheets were synthesized by hydrothermal method and functionalized with 1-octadecanethiol (i.e., MoS2-ODT). The MoS2 and MoS2-ODT nanosheets were dispersed in the grease with different concentrations to evaluate its tribological performance. Tribological results unveiled that the addition of MoS2 nanosheets in grease appreciably reduced the coefficient of friction and mean wear volume of tribo-interfaces as compared with pure grease. Energy dispersive spectroscopy (EDS) spectrum revealed the deposition of MoS2 on the worn surface and confirmed a thin tribo-film which protects steel tribo-pair against wear.

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

2019 ◽  
Vol 9 (1) ◽  
pp. 170 ◽  
Author(s):  
Chunying Min ◽  
Zengbao He ◽  
Haojie Song ◽  
Dengdeng Liu ◽  
Wei Jia ◽  
...  
Keyword(s):  
Tribological Performance ◽  
Ceo2 Nanoparticles ◽  
Hybrid Nanocomposite ◽  
Facile Hydrothermal Method ◽  
One Dimensional ◽  
Paraffin Oil ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Lubrication Properties ◽  
Lubricating Properties

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.

Effect of CuO and ZnO Nano-Additives on the Tribological Performance of Paraffin Oil–Based Lithium Grease

2019 ◽  
Vol 63 (1) ◽  
pp. 90-100
Author(s):  
Sooraj Singh Rawat ◽  
A. P. Harsha ◽  
Santanu Das ◽  
Agarwal Pratik Deepak
Keyword(s):  
Tribological Performance ◽  
Lithium Grease ◽  
Paraffin Oil ◽  
Nano Additives

Effects of frictional heat on the tribological properties of Ni3Al matrix self-lubricating composite containing graphene nanoplatelets under different loads

2017 ◽  
Vol 232 (6) ◽  
pp. 645-656 ◽  
Author(s):  
Yuchun Huang ◽  
Xiaoliang Shi ◽  
Kang Yang ◽  
Xiyao Liu ◽  
Zhihai Wang
Keyword(s):  
Working Conditions ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Tribological Behavior ◽  
Tribological Performance ◽  
Graphene Nanoplatelets ◽  
Frictional Heat ◽  
Worn Surface ◽  
Al Matrix ◽  
Better Than

In order to analyze the effects of frictional heat on the tribological performance of Ni3Al matrix self-lubricating composite containing 6.2 vol.% graphene nanoplatelets (NB), the dry sliding friction tests of Ni3Al-based alloy and NB against GCr15 steel ball are undertaken under different loads from 3 to 18 N. The effects of different amount of frictional heat on the friction and wear mechanism of NB are also studied. The results show that tribological performance of NB is better than that of Ni3Al-based alloy under same working conditions. The addition of graphene nanoplatelets promotes the formation of stable glaze layer on worn surface. In addition, graphene nanoplatelets enhance the thermal conductivity of NB, which makes the surface temperature of wear scar of NB in a proper range (about 413 ℃) at 13 N and avoids the serious friction and wear caused by the accumulation of frictional heat. At 13 N, NB shows the lower friction coefficient (0.32) and wear rate (3.6 × 10−5 mm3·N−1·m−1). It is attributed to the appropriate local temperature (about 413 ℃) of worn surface, resulting in the formation of stable glaze layer with good friction reducing and wear resistance on worn surface. This study was meaningful for optimizing applied loads to realize the appropriate frictional heat and good tribological behavior of NB.

scholarly journals Preparation and Tribological Properties of WS2 Hexagonal Nanoplates and Nanoflowers

Nanomaterials ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 840 ◽  
Author(s):  
Xianghua Zhang ◽  
Jiangtao Wang ◽  
Hongxiang Xu ◽  
Heng Tan ◽  
Xia Ye
Keyword(s):  
Electron Microscopy ◽  
Tribological Properties ◽  
Tribological Performance ◽  
Lubricating Oil ◽  
X Ray Diffraction ◽  
Wear Performance ◽  
Paraffin Oil ◽  
Transmission Electron ◽  
Special Morphology ◽  
Hexagonal Nanoplates

This paper presents the facile synthesis of two different morphologies of WS2 nanomaterials—WS2 hexagonal nanoplates and nanoflowers—by a sulfurization reaction. The phases and morphology of the samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The tribological performance of the two kinds of WS2 nanomaterials as additives in paraffin oil were measured using a UMT (Universal Mechanical Tester)-2 tribotester. The results demonstrated that the friction and wear performance of paraffin oil can be greatly improved with the addition of WS2 nanomaterials, and that the morphology and content of WS2 nanomaterials have a significant effect on the tribological properties of paraffin oil. The tribological performance of lubricating oil was best when the concentration of the WS2 nanomaterial additive was 0.5 wt %. Moreover, the paraffin oil with added WS2 nanoflowers exhibited better tribological properties than paraffin oil with added WS2 hexagonal nanoplates. The superior tribological properties of WS2 nanoflowers can be attributed to their special morphology, which contributes to the formation of a uniform tribo-film during the sliding process.

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