Lubrication properties of chemically aged reduced graphene-oxide additives

Bhavana Gupta; Niranjan Kumar; Alexey Titovich Kozakov; Vladimir Ivanovich Kolesnikov; Andrey V. Sidashov; Sitaram Dash

doi:10.1016/j.surfin.2017.02.005

Lubrication properties of chemically aged reduced graphene-oxide additives

Bhavana Gupta
, Niranjan Kumar
, Alexey Titovich Kozakov
, Vladimir Ivanovich Kolesnikov
, Andrey V. Sidashov
, Sitaram Dash

The Swiss Institute for Dryland Environmental and Energy Research

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

Functionalized graphene is a hydrophilic material that could be an important lubricating additive due to the unique chemical and crystallographic properties. Functionalized aged reduced graphene oxide (A-rGO) additives dispersed in polyethylene glycol (PEG200) significantly improved the lubrication properties of steel-steel contact which is promising for useful application. Aging in humid condition transformed the single phase oxygen functionalized reduced graphene oxide (rGO) into a diphase material where lattice spacing of graphene sheet increased and rGO coexist with the nanocrystalline graphite phase. The evidence of adsorbed graphite tribo-species in the wear track is observed by X-ray photoelectron spectroscopy (XPS) and micro Raman spectroscopy. This acts as a high strength boundary and low shear strength tribofilm for enhancing the antiwear and antifriction properties.

Original language	English
Pages (from-to)	6-13
Number of pages	8
Journal	Surfaces and Interfaces
Volume	7
DOIs	https://doi.org/10.1016/j.surfin.2017.02.005
State	Published - 1 Jun 2017

Keywords

Friction
Graphene oxide ageing
Lubrication
Wear

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
General Physics and Astronomy
Surfaces and Interfaces
Surfaces, Coatings and Films

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10.1016/j.surfin.2017.02.005

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title = "Lubrication properties of chemically aged reduced graphene-oxide additives",

abstract = "Functionalized graphene is a hydrophilic material that could be an important lubricating additive due to the unique chemical and crystallographic properties. Functionalized aged reduced graphene oxide (A-rGO) additives dispersed in polyethylene glycol (PEG200) significantly improved the lubrication properties of steel-steel contact which is promising for useful application. Aging in humid condition transformed the single phase oxygen functionalized reduced graphene oxide (rGO) into a diphase material where lattice spacing of graphene sheet increased and rGO coexist with the nanocrystalline graphite phase. The evidence of adsorbed graphite tribo-species in the wear track is observed by X-ray photoelectron spectroscopy (XPS) and micro Raman spectroscopy. This acts as a high strength boundary and low shear strength tribofilm for enhancing the antiwear and antifriction properties.",

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author = "Bhavana Gupta and Niranjan Kumar and Kozakov, \{Alexey Titovich\} and Kolesnikov, \{Vladimir Ivanovich\} and Sidashov, \{Andrey V.\} and Sitaram Dash",

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doi = "10.1016/j.surfin.2017.02.005",

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TY - JOUR

T1 - Lubrication properties of chemically aged reduced graphene-oxide additives

AU - Gupta, Bhavana

AU - Kumar, Niranjan

AU - Kozakov, Alexey Titovich

AU - Kolesnikov, Vladimir Ivanovich

AU - Sidashov, Andrey V.

AU - Dash, Sitaram

PY - 2017/6/1

Y1 - 2017/6/1

N2 - Functionalized graphene is a hydrophilic material that could be an important lubricating additive due to the unique chemical and crystallographic properties. Functionalized aged reduced graphene oxide (A-rGO) additives dispersed in polyethylene glycol (PEG200) significantly improved the lubrication properties of steel-steel contact which is promising for useful application. Aging in humid condition transformed the single phase oxygen functionalized reduced graphene oxide (rGO) into a diphase material where lattice spacing of graphene sheet increased and rGO coexist with the nanocrystalline graphite phase. The evidence of adsorbed graphite tribo-species in the wear track is observed by X-ray photoelectron spectroscopy (XPS) and micro Raman spectroscopy. This acts as a high strength boundary and low shear strength tribofilm for enhancing the antiwear and antifriction properties.

AB - Functionalized graphene is a hydrophilic material that could be an important lubricating additive due to the unique chemical and crystallographic properties. Functionalized aged reduced graphene oxide (A-rGO) additives dispersed in polyethylene glycol (PEG200) significantly improved the lubrication properties of steel-steel contact which is promising for useful application. Aging in humid condition transformed the single phase oxygen functionalized reduced graphene oxide (rGO) into a diphase material where lattice spacing of graphene sheet increased and rGO coexist with the nanocrystalline graphite phase. The evidence of adsorbed graphite tribo-species in the wear track is observed by X-ray photoelectron spectroscopy (XPS) and micro Raman spectroscopy. This acts as a high strength boundary and low shear strength tribofilm for enhancing the antiwear and antifriction properties.

KW - Friction

KW - Graphene oxide ageing

KW - Lubrication

KW - Wear

UR - https://www.scopus.com/pages/publications/85019684465

U2 - 10.1016/j.surfin.2017.02.005

DO - 10.1016/j.surfin.2017.02.005

M3 - Article

AN - SCOPUS:85019684465

SN - 2468-0230

VL - 7

SP - 6

EP - 13

JO - Surfaces and Interfaces

JF - Surfaces and Interfaces

ER -

Lubrication properties of chemically aged reduced graphene-oxide additives

Abstract

Keywords

ASJC Scopus subject areas

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