Grafting of straight alkyl chain improved the hydrophobicity and tribological performance of graphene oxide in oil as lubricant
| Autor: | Nurin Wahidah Mohd Zulkifli, Zaira Zaman Chowdhury, Mohd Rafie Johan, Nurul Athirah Ismail |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Base oil Oxide 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention Contact angle symbols.namesake chemistry.chemical_compound law Materials Chemistry Physical and Theoretical Chemistry Lubricant Fourier transform infrared spectroscopy Spectroscopy Alkyl chemistry.chemical_classification Graphene 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Chemical engineering symbols 0210 nano-technology Raman spectroscopy |
| Zdroj: | Journal of Molecular Liquids. 319:114276 |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2020.114276 |
| Popis: | Functionalised graphene (AGO-C(n)), when paired with base oils, results in a product that is dispersively stable with enhanced tribological properties. Straight alkyl chains provided by octadecylamine (ODA), tetradecylamine (TDA), and decylamine (DA) were covalently attached to graphene oxide (GO) via the direct amidation process to synthesise amide-functionalised graphene oxide (AGO-C(n)). The attachment of the ODA, TDA, and DA at the surface of the GO was confirmed via the FTIR, XRD, TGA, Raman, and FESEM/EDX techniques. The hydrophobicity of AGO-C(n) was established via its higher contact angle relative to GO. Stable dispersion of AGO-C(n) in base oil after 30 days was confirmed by UV–vis technique. The AGO-C(n) demonstrated superior tribological behaviour relative to GO due to its high reduction of coefficient of friction (CoF) and wear scar diameter (WSD) of ~22% and ~61% (highest), respectively. |
| Databáze: | OpenAIRE |
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