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Synthesis of Graphene Nanofluids with Controllable Flake Size Distributions

Synthesis of Graphene Nanofluids with Controllable Flake Size Distributions

Published on: July 17, 2019

Graphene-based engine oil nanofluids for tribological applications.

Varrla Eswaraiah¹, Venkataraman Sankaranarayanan, Sundara Ramaprabhu

¹Alternative Energy and Nanotechnology Laboratory, Nanofunctional Materials Technology Center (NFMTC), Department of Physics, Indian Institute of Technology Madras, Chennai-600036, India.

ACS Applied Materials & Interfaces

|October 11, 2011

Summary

Ultrathin graphene (UG) significantly enhances engine oil performance. Graphene-based nanofluids show remarkable improvements in friction reduction, antiwear, and extreme pressure properties compared to base oil.

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Area of Science:

Materials Science
Tribology
Nanotechnology

Background:

Engine oils are crucial for reducing friction and wear in machinery.
Enhancing lubricant properties is essential for improving efficiency and longevity.
Graphene, a novel nanomaterial, shows potential for tribological applications.

Purpose of the Study:

To prepare ultrathin graphene (UG) using a novel solar radiation technique.
To evaluate the tribological properties of graphene-based engine oil nanofluids.
To investigate the potential of UG as an additive for improving engine oil performance.

Main Methods:

Ultrathin graphene (UG) synthesized via exfoliation of graphite oxide using focused solar radiation.
Graphene-based engine oil nanofluids prepared by dispersing UG in base oil.
Frictional characteristics (FC), antiwear (AW), and extreme pressure (EP) properties evaluated using standard tribological tests.

Main Results:

Significant improvements observed in FC (80%), AW (33%), and EP (40%) properties of nanofluids compared to base oil.
Graphene addition effectively reduced friction and wear under various load conditions.
The performance enhancement was consistent across different tribological parameters.

Conclusions:

Ultrathin graphene is a highly effective additive for enhancing engine oil tribological properties.
The nanobearing mechanism and mechanical strength of graphene contribute to improved lubrication.
Graphene-based nanofluids offer a promising solution for advanced lubrication applications.