Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) Lubricants
Abstract
:1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Halide Salt | mp/°C | Hydrogen Bond Donor (HBD) | mp/°C | Salt:HBD (Molar Ratio) | Viscosity (cP) | Density (g/cm3) | Conductivity (mS/cm−1) | DES Tf °C |
---|---|---|---|---|---|---|---|---|
ChCl | 303 | Urea | 134 | 1:2 | 630–750 | 1.16 | 0.75 | 12 |
ChCl | 303 | Ethylene glycol | −12.9 | 1:2 | 36 | 1.06–1.10 | 7.61 | - |
ChCl | 303 | Malic acid | 130 | 1:1 | 446 | 1.23 | 0.1–10 | −56 |
Lubricant | Wear Rate (10−8 mm3/mN) | SD (10−8 mm3/mN) | COF | SD |
---|---|---|---|---|
PAO6 | 1.5 | 0.2 | 0.116 | 0.006 |
ChCl-urea | 4.9 | 1.1 | 0.05 | 0.01 |
ChCl-malic acid | 1.3 | 0.9 | 0.024 | 0.004 |
ChCl-ethylene glycol | 2.6 | 1.8 | 0.017 | 0.004 |
PAO6 + graphene | 0.2 | 0.1 | 0.108 | 0.003 |
ChCl-urea + graphene | 2.1 | 0.6 | 0.013 | 0.001 |
ChCl-malic acid + graphene | 1.1 | 1.1 | 0.043 | 0.009 |
ChCl-ethylene glycol + graphene | 2.2 | 0.2 | 0.010 | 0.005 |
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Garcia, I.; Guerra, S.; de Damborenea, J.; Conde, A. Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) Lubricants. Lubricants 2019, 7, 37. https://doi.org/10.3390/lubricants7040037
Garcia I, Guerra S, de Damborenea J, Conde A. Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) Lubricants. Lubricants. 2019; 7(4):37. https://doi.org/10.3390/lubricants7040037
Chicago/Turabian StyleGarcia, Ignacio, Silvia Guerra, Juan de Damborenea, and Ana Conde. 2019. "Reduction of the Coefficient of Friction of Steel-Steel Tribological Contacts by Novel Graphene-Deep Eutectic Solvents (DESs) Lubricants" Lubricants 7, no. 4: 37. https://doi.org/10.3390/lubricants7040037