Issue 81, 2015
From the journal:

RSC Advances

Non-corrosive green lubricants: strengthened lignin–[choline][amino acid] ionic liquids interaction via reciprocal hydrogen bonding

Liwen Mu,a   Yijun Shi,*b   Xiaojing Guo,c   Tuo Ji,a   Long Chen,a   Ruixia Yuan,ad   Logan Brisbin,a   Huaiyuan Wangd  and  Jiahua Zhu*a  

* Corresponding authors

a Intelligent Composites Laboratory, Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH 44325, USA
E-mail: jzhu1@uakron.edu
Tel: +1-330-972-6859

b Division of Machine Elements, Luleå University of Technology, Luleå, Sweden
E-mail: yijun.shi@ltu.se
Tel: +46-920492064

c Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, P. R. China

d College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, P. R. China

Abstract

A series of novel green lubricants with dissolved lignin in [choline][amino acid] ([CH][AA]) ionic liquids (ILs) have been synthesized in this work. The effect of lignin on the thermal and tribological properties of the lignin/[CH][AA] lubricants was systematically investigated by means of thermogravimetric analysis, differential scanning calorimetry, and a friction and wear tester. The lignin in [CH][AA] has been demonstrated to be an effective additive to improve thermal stability, reduce the wear rates and stabilize the friction coefficients of lignin/[CH][AA] lubricants. Density function theory calculations on the electronic structure of [CH][AA] ILs reveal the atomic natural charge of ILs and their hydrogen bonding capability with lignin. Moreover, these green lubricants show excellent anti-corrosive properties against commercial aluminum and iron boards. The strong physical adsorption of [CH][AA] ILs onto the steel surface and the reciprocal hydrogen bonding between [CH][AA] ILs and lignin synergistically contribute to the enhanced lubrication film strength and thus the tribological properties of these new lubricants. This work provides a new perspective on utilizing complete bio-products in advanced tribological lubrication systems. In addition, this will open a new application venue for lignin to improve product value in lignocellulosic biomass utilization.

Graphical abstract: Non-corrosive green lubricants: strengthened lignin–[choline][amino acid] ionic liquids interaction via reciprocal hydrogen bonding

About
Cited by
Related
Download options Please wait...

Article information

DOI
https://doi.org/10.1039/C5RA11093A
Article type
Paper
Submitted
11 Jun 2015
Accepted
15 Jul 2015
First published
15 Jul 2015
This article is Open Access
Creative Commons BY license

RSC Adv., 2015,5, 66067-66072

Permissions

Request permissions

Non-corrosive green lubricants: strengthened lignin–[choline][amino acid] ionic liquids interaction via reciprocal hydrogen bonding

L. Mu, Y. Shi, X. Guo, T. Ji, L. Chen, R. Yuan, L. Brisbin, H. Wang and J. Zhu, RSC Adv., 2015, 5, 66067 DOI: 10.1039/C5RA11093A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements