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Non-corrosive green lubricants: strengthened lignin–[choline][amino acid] ionic liquids interaction via reciprocal hydrogen bonding
State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Intelligent Composites Laboratory, Department of Chemical and Biomolecular Engineering, The University of Akron.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Maskinelement.ORCID-id: 0000-0001-6085-7880
Shanghai Institute of Applied Physics, Chinese Academy of Sciences.
Intelligent Composites Laboratory, Department of Chemical and Biomolecular Engineering, The University of Akron.
Vise andre og tillknytning
2015 (engelsk)Inngår i: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 5, nr 81, s. 66067-66072Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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.

sted, utgiver, år, opplag, sider
2015. Vol. 5, nr 81, s. 66067-66072
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URN: urn:nbn:se:ltu:diva-239DOI: 10.1039/C5RA11093AISI: 000359243000052Scopus ID: 2-s2.0-84938802490Lokal ID: 00f63425-c11a-43b1-98e5-e03e7674f814OAI: oai:DiVA.org:ltu-239DiVA, id: diva2:972351
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Validerad; 2015; Nivå 2; 20150821 (andbra)

Tilgjengelig fra: 2016-09-20 Laget: 2016-09-20 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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