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Research Article | Open Access

Effective sugar-derived organic gelator for three different types of lubricant oils to improve tribological performance

Ruochong ZHANG1,2, Xuqing LIU3, Zhiguang GUO1,4, Meirong CAI1 ( ), Lei SHI1( )
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
University of Chinese Academy of Sciences, Beijing 100049, China
School of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, UK
Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Key Laboratory for the Green Preparation and Application of Functional Materials (Ministry of Education), Hubei University, Wuhan 430062, China
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Abstract

In this study, the gelling ability and lubrication performance of N-octadecyl-D-gluconamides (NOG) in liquid paraffin (LP), pentaerythritol oleate (PE-OA), and polyethylene glycol (PEG) oils were systemically investigated. The NOG, which could gelate the investigated oils, was successfully synthesized by a one-step method. The prepared gel lubricants were completely thermoreversible and exhibited improved thermal stability, according to the thermogravimetry analysis (TGA) reports. Rheological tests confirmed that the NOG gelator could effectively regulate the rheological behavior of the base oils. Tribological evaluation suggested that NOG, as an additive in the three types of base oils, could remarkably reduce the friction and wear in steel contacts. A plausible mechanism for the improved performances was proposed based on the mechanical strength of the gels and the formation of the boundary-lubricating film on the worn surface. The results indicated that NOG is a potential gelator for preparing gel lubricants with excellent tribological properties and environment-friendly characteristics.

Keywords

gel lubricantsupermolecular assemblyrheological propertytribological performancelubricating mechanism

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Friction
Volume 8 Issue 6,
December 2020
Pages 1025-1038
DOI: 10.1007/s40544-019-0316-0

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ZHANG R, LIU X, GUO Z, et al. Effective sugar-derived organic gelator for three different types of lubricant oils to improve tribological performance. Friction, 2020, 8(6): 1025-1038. https://doi.org/10.1007/s40544-019-0316-0

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Received: 19 July 2017
Revised: 30 September 2018
Accepted: 06 July 2019
Published: 09 September 2019
© The author(s) 2019

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