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Wolk A, Rosenthal M, Neuhaus S, Huber K, Brassat K, Lindner JKN, Grothe R, Grundmeier G, Bremser W, Wilhelm R. A Novel Lubricant Based on Covalent Functionalized Graphene Oxide Quantum Dots. Sci Rep 2018; 8:5843. [PMID: 29643400 PMCID: PMC5895846 DOI: 10.1038/s41598-018-24062-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 03/26/2018] [Indexed: 12/31/2022] Open
Abstract
Dodecyl amine edge functionalized few-layer graphene oxide quantum dots were synthesized in good yields. The covalent functionalization was demonstrated with NMR and AFM-IR. The resulting structure and particle size was measured with AFM and HRTEM. The thermal stability of the compound was investigated and showed a stability of up to 220 °C. The modified graphene oxide quantum dots showed excellent solubility in various organic solvents, including ethers, methanol, toluene, n-hexane, heptane, xylene, dichloromethane and toluene. The stability of a resulting toluene solution was also proven by static light scattering measurements over several days. The excellent solubility gives the possibility of an efficient and fast spray application of the functionalized graphene oxide quantum dots to steel surfaces. Hence, the macroscopic friction behavior was investigated with a Thwing-Albert FP-2250 friction tester. A thin film of the dodecyl amine functionalized graphene oxide quantum dots on steel lowered the friction coefficient from 0.17 to 0.11 and revealed a significant corrosion inhibition effect.
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Affiliation(s)
- Andreas Wolk
- University of Paderborn, Department of Chemistry, Technical Chemistry, Warburgerstr. 100, 33098, Paderborn, Germany
| | - Marta Rosenthal
- University of Paderborn, Department of Chemistry, Organic Chemistry, Warburgerstr. 100, 33098, Paderborn, Germany
| | - Stephan Neuhaus
- University of Paderborn, Department of Chemistry, Technical Chemistry, Warburgerstr. 100, 33098, Paderborn, Germany
| | - Klaus Huber
- University of Paderborn, Department of Chemistry, Physical Chemistry, Warburgerstr. 100, 33098, Paderborn, Germany
| | - Katharina Brassat
- University of Paderborn, Department of Physics, Warburgerstr. 100, 33098, Paderborn, Germany
| | - Jörg K N Lindner
- University of Paderborn, Department of Physics, Warburgerstr. 100, 33098, Paderborn, Germany
| | - Richard Grothe
- University of Paderborn, Department of Chemistry, Technical Chemistry, Warburgerstr. 100, 33098, Paderborn, Germany
| | - Guido Grundmeier
- University of Paderborn, Department of Chemistry, Technical Chemistry, Warburgerstr. 100, 33098, Paderborn, Germany
| | - Wolfgang Bremser
- University of Paderborn, Department of Chemistry, Technical Chemistry, Warburgerstr. 100, 33098, Paderborn, Germany.
| | - René Wilhelm
- University of Paderborn, Department of Chemistry, Organic Chemistry, Warburgerstr. 100, 33098, Paderborn, Germany.
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Xu Z, Zhang Q, Zhai W, Li X. Analytical model and experimental validation of the local damage mechanism of solid lubricant films for metal matrix self-lubricating composites. RSC Adv 2015. [DOI: 10.1039/c5ra14224e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Schematic representation of the local damage mechanism of solid lubricant films during the sliding friction process.
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Affiliation(s)
- Zengshi Xu
- School of Mechanical and Electronic Engineering
- Wuhan University of Technology
- Wuhan 430070
- China
| | - Qiaoxin Zhang
- School of Mechanical and Electronic Engineering
- Wuhan University of Technology
- Wuhan 430070
- China
| | - Wenzheng Zhai
- School of Mechanical and Electronic Engineering
- Wuhan University of Technology
- Wuhan 430070
- China
| | - Xixing Li
- School of Mechanical and Electronic Engineering
- Wuhan University of Technology
- Wuhan 430070
- China
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