Enhanced Tribological Performance of Aminated Nano-Silica Modified Graphene Oxide as Water-Based Lubricant Additive

2018 ◽  
Vol 1 (11) ◽  
pp. 6444-6453 ◽  
Author(s):  
Pengfei Guo ◽  
Lin Chen ◽  
Jingjing Wang ◽  
Zhongrong Geng ◽  
Zhibin Lu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Lubricant Additive ◽  
Tribological Performance ◽  
Nano Silica ◽  
Modified Graphene Oxide ◽  
Water Based ◽  
Modified Graphene

High dispersivity and excellent tribological performance of titanate coupling agent modified graphene oxide in hydraulic oil

Carbon ◽  
2020 ◽  
Vol 165 ◽  
pp. 238-250 ◽  
Author(s):  
Xiaopeng Li ◽  
Chaoliang Gan ◽  
Zeyong Han ◽  
Han Yan ◽  
Duoli Chen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Coupling Agent ◽  
Tribological Performance ◽  
Hydraulic Oil ◽  
Modified Graphene Oxide ◽  
Modified Graphene

Tribological properties of graphene oxide sheets as water-based lubricant additive

2018 ◽  
Vol 70 (6) ◽  
pp. 1025-1036 ◽  
Author(s):  
Gangqiang Zhang ◽  
Xiangqiong Zeng ◽  
Tianhui Ren ◽  
Emile van der Heide
Keyword(s):  
Graphene Oxide ◽  
Normal Load ◽  
Lubricant Additive ◽  
Tribological Performance ◽  
Content Type ◽  
Angle Measurements ◽  
Water Based ◽  
Stainless Steel Ball ◽  
Microstructure Morphology ◽  
Experimental Findings

Purpose The purpose of this paper is to investigate the tribological performance of graphene oxide (GO) sheets as water-based lubricant additive when ultra-high molecular weight polyethylene (UHMWPE) plates slid against 316L stainless steel ball using a reciprocating tribometre. Design/methodology/approach The factors influencing the tribological performance were considered, including the viscosity of the GO dispersion, normal load, sliding velocity and the roughness of UHMWPE. The surface microstructure and properties of UHMWPE were studied by means of scanning electron microscopy, laser confocal microscopy, Raman spectroscopy and contact angle measurements. Findings The results revealed that the GO dispersion reduced friction and sliding-wear. The surface images of the wear UHMWPE plates indicated that GO sheets were prone to adsorption on the surface and form a thin physical tribofilms at the substrate. Originality/value Based on the experimental findings for the evolution of the microstructure morphology and the development of subsurface cracks, less debris and cracking can be observed in the UHMWPE plates lubricated by GO dispersion.

Analysis of Tribological Properties of Triethanolamine Modified Graphene Oxide Additive in Water

2018 ◽  
Vol 141 (1) ◽  
Author(s):  
Jianlin Sun ◽  
Shaonan Du ◽  
Yanan Meng ◽  
Ping Wu
Keyword(s):  
Graphene Oxide ◽  
Optical Microscope ◽  
Tribological Performance ◽  
Wear Scar Diameter ◽  
High Temperature Reaction ◽  
Reaction Solution ◽  
Modified Graphene Oxide ◽  
Microscopic Morphology ◽  
Modified Graphene ◽  
Worn Surface

In this paper, triethanolamine modified graphene oxide (TMGO) has been synthesized by filtering and drying the high-temperature reaction solution of graphene oxide (GO) and triethanolamine. The tribological performance of TMGO and GO in de-ionized water were investigated using a four-ball tribometer. The microscopic morphology of the worn surface was analyzed by optical microscope and scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). The results showed that the average friction coefficient (AFC) and wear scar diameter (WSD) of 0.1 wt % TMGO decreased by 21.9% and 6.2% compared with the two values of 0.1 wt % GO, and no corrosion occurred on metal surface. The minimum of the AFC and WSD occurred at 0.3 wt % TMGO. This study provides a new reference for the application of graphene oxide in lubrication.

scholarly journals Design, synthesis, and catalytic performance of modified graphene oxide based on a cobalt complex as a heterogenous catalyst for the preparation of aminonaphthoquinone derivatives

RSC Advances ◽  
2021 ◽  
Vol 11 (28) ◽  
pp. 17108-17115
Author(s):  
Mahnaz Mirheidari ◽  
Javad Safaei-Ghomi
Keyword(s):  
Graphene Oxide ◽  
Cobalt Complex ◽  
Catalytic Performance ◽  
Silica Particles ◽  
Design Synthesis ◽  
Spherical Silica ◽  
Modified Graphene Oxide ◽  
Spherical Silica Particles ◽  
Heterogenous Catalyst ◽  
Modified Graphene

GO@f-SiO2@Co is a heterogenous catalyst composed of spherical silica particles grafted on the surface of graphene oxide with ethylenediamine ligands and coordination with Co(ii). We assessed the activity of the catalyst for the synthesis of aminonaphthoquinones.

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