Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) Lubricants
Deep eutectic ionic liquids (DES) possess similar properties to conventional ionic liquids (ILs). However, ILs cannot be considered as environmentally friendly compounds due to both its processing and synthesis, which could have significant polluting effects. On the contrary, deep eutectic solvents...
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doaj-c4e58bd585a54bb1b02c50be4fbe1b322020-11-25T00:55:41ZengMDPI AGLubricants2075-44422019-04-01743710.3390/lubricants7040037lubricants7040037Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) LubricantsIgnacio Garcia0Silvia Guerra1Juan de Damborenea2Ana Conde3Surface Engineering, Corrosion and Durability Department, National Centre for Metallurgical Research (CENIM-CSIC), Avda. Gregorio del Amo 8, E28040 Madrid, SpainSurface Engineering, Corrosion and Durability Department, National Centre for Metallurgical Research (CENIM-CSIC), Avda. Gregorio del Amo 8, E28040 Madrid, SpainSurface Engineering, Corrosion and Durability Department, National Centre for Metallurgical Research (CENIM-CSIC), Avda. Gregorio del Amo 8, E28040 Madrid, SpainSurface Engineering, Corrosion and Durability Department, National Centre for Metallurgical Research (CENIM-CSIC), Avda. Gregorio del Amo 8, E28040 Madrid, SpainDeep eutectic ionic liquids (DES) possess similar properties to conventional ionic liquids (ILs). However, ILs cannot be considered as environmentally friendly compounds due to both its processing and synthesis, which could have significant polluting effects. On the contrary, deep eutectic solvents (DESs) can be biodegradable, non-toxic, and have a lower price than most ILs, making them potentially useful in a wide variety of advanced technological applications, such as tribology. On the other hand, graphene has recently been proposed as an extremely promising lubricant due to its combination of mechanical properties and chemical stability as well as its “green„ character. In the present paper, graphene flakes (≈250 nm) have been used as an additive to DES composed of choline chloride (ChCl)-urea, ChCl-ethylene glycol, and ChCl-malic acid. According to the results, the addition of 1 wt% graphene reduces friction coefficient (COF) and, notably, prevents adhesive wear, reducing wear rate on steel-steel sliding contacts.https://www.mdpi.com/2075-4442/7/4/37carbon nanomaterialsgraphenefriction and wear mechanismssteeldeep eutectic solventsionic liquids |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ignacio Garcia Silvia Guerra Juan de Damborenea Ana Conde |
spellingShingle |
Ignacio Garcia Silvia Guerra Juan de Damborenea Ana Conde Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) Lubricants Lubricants carbon nanomaterials graphene friction and wear mechanisms steel deep eutectic solvents ionic liquids |
author_facet |
Ignacio Garcia Silvia Guerra Juan de Damborenea Ana Conde |
author_sort |
Ignacio Garcia |
title |
Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) Lubricants |
title_short |
Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) Lubricants |
title_full |
Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) Lubricants |
title_fullStr |
Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) Lubricants |
title_full_unstemmed |
Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) Lubricants |
title_sort |
reduction of the coefficient of friction of steel-steel tribological contacts by novel graphene-deep eutectic solvents (dess) lubricants |
publisher |
MDPI AG |
series |
Lubricants |
issn |
2075-4442 |
publishDate |
2019-04-01 |
description |
Deep eutectic ionic liquids (DES) possess similar properties to conventional ionic liquids (ILs). However, ILs cannot be considered as environmentally friendly compounds due to both its processing and synthesis, which could have significant polluting effects. On the contrary, deep eutectic solvents (DESs) can be biodegradable, non-toxic, and have a lower price than most ILs, making them potentially useful in a wide variety of advanced technological applications, such as tribology. On the other hand, graphene has recently been proposed as an extremely promising lubricant due to its combination of mechanical properties and chemical stability as well as its “green„ character. In the present paper, graphene flakes (≈250 nm) have been used as an additive to DES composed of choline chloride (ChCl)-urea, ChCl-ethylene glycol, and ChCl-malic acid. According to the results, the addition of 1 wt% graphene reduces friction coefficient (COF) and, notably, prevents adhesive wear, reducing wear rate on steel-steel sliding contacts. |
topic |
carbon nanomaterials graphene friction and wear mechanisms steel deep eutectic solvents ionic liquids |
url |
https://www.mdpi.com/2075-4442/7/4/37 |
work_keys_str_mv |
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