Engineered silica nanoparticles as additives in lubricant oils
Silica nanoparticles (SiO2 NPs) synthesized by the sol–gel approach were engineered for size and surface properties by grafting hydrophobic chains to prevent their aggregation and facilitate their contact with the phase boundary, thus improving their dispersibility in lubricant base oils. The surfac...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2015-10-01
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| Series: | Science and Technology of Advanced Materials |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1088/1468-6996/16/5/055005 |
| _version_ | 1819060514867642368 |
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| author | Teresa Díaz-Faes López Alfonso Fernández González Ángel Del Reguero María Matos Marta E Díaz-García Rosana Badía-Laíño |
| author_facet | Teresa Díaz-Faes López Alfonso Fernández González Ángel Del Reguero María Matos Marta E Díaz-García Rosana Badía-Laíño |
| author_sort | Teresa Díaz-Faes López |
| collection | DOAJ |
| description | Silica nanoparticles (SiO2 NPs) synthesized by the sol–gel approach were engineered for size and surface properties by grafting hydrophobic chains to prevent their aggregation and facilitate their contact with the phase boundary, thus improving their dispersibility in lubricant base oils. The surface modification was performed by covalent binding of long chain alkyl functionalities using lauric acid and decanoyl chloride to the SiO2 NP surface. The hybrid SiO2 NPs were characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, simultaneous differential thermal analysis, nuclear magnetic resonance and dynamic light scattering, while their dispersion in two base oils was studied by static multiple light scattering at low (0.01% w/v) and high (0.50%w/v) concentrations. The nature of the functional layer and the functionalization degree seemed to be directly involved in the stability of the suspensions. The potential use of the functional SiO2 NPs as lubricant additives in base oils, specially designed for being used in hydraulic circuits, has been outlined by analyzing the tribological properties of the dispersions. The dendritic structure of the external layer played a key role in the tribological characteristics of the material by reducing the friction coefficient and wear. These nanoparticles reduce drastically the waste of energy in friction processes and are more environmentally friendly than other additives. |
| first_indexed | 2024-12-21T14:28:13Z |
| format | Article |
| id | doaj.art-e8a275aa54414c15983b2277fd042142 |
| institution | Directory Open Access Journal |
| issn | 1468-6996 1878-5514 |
| language | English |
| last_indexed | 2024-12-21T14:28:13Z |
| publishDate | 2015-10-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Science and Technology of Advanced Materials |
| spelling | doaj.art-e8a275aa54414c15983b2277fd0421422022-12-21T19:00:35ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142015-10-0116510.1088/1468-6996/16/5/05500511661336Engineered silica nanoparticles as additives in lubricant oilsTeresa Díaz-Faes López0Alfonso Fernández González1Ángel Del Reguero2María Matos3Marta E Díaz-García4Rosana Badía-Laíño5University of Oviedo, Av. Julián ClaveríaUniversity of Oviedo, Av. Julián ClaveríaUniversity of OviedoUniversity of OviedoUniversity of Oviedo, Av. Julián ClaveríaUniversity of Oviedo, Av. Julián ClaveríaSilica nanoparticles (SiO2 NPs) synthesized by the sol–gel approach were engineered for size and surface properties by grafting hydrophobic chains to prevent their aggregation and facilitate their contact with the phase boundary, thus improving their dispersibility in lubricant base oils. The surface modification was performed by covalent binding of long chain alkyl functionalities using lauric acid and decanoyl chloride to the SiO2 NP surface. The hybrid SiO2 NPs were characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, simultaneous differential thermal analysis, nuclear magnetic resonance and dynamic light scattering, while their dispersion in two base oils was studied by static multiple light scattering at low (0.01% w/v) and high (0.50%w/v) concentrations. The nature of the functional layer and the functionalization degree seemed to be directly involved in the stability of the suspensions. The potential use of the functional SiO2 NPs as lubricant additives in base oils, specially designed for being used in hydraulic circuits, has been outlined by analyzing the tribological properties of the dispersions. The dendritic structure of the external layer played a key role in the tribological characteristics of the material by reducing the friction coefficient and wear. These nanoparticles reduce drastically the waste of energy in friction processes and are more environmentally friendly than other additives.http://dx.doi.org/10.1088/1468-6996/16/5/055005engineered hybrid sio2 nanoparticlessurface functionalizationdispersion stabilitytribological propertiesbase oil |
| spellingShingle | Teresa Díaz-Faes López Alfonso Fernández González Ángel Del Reguero María Matos Marta E Díaz-García Rosana Badía-Laíño Engineered silica nanoparticles as additives in lubricant oils Science and Technology of Advanced Materials engineered hybrid sio2 nanoparticles surface functionalization dispersion stability tribological properties base oil |
| title | Engineered silica nanoparticles as additives in lubricant oils |
| title_full | Engineered silica nanoparticles as additives in lubricant oils |
| title_fullStr | Engineered silica nanoparticles as additives in lubricant oils |
| title_full_unstemmed | Engineered silica nanoparticles as additives in lubricant oils |
| title_short | Engineered silica nanoparticles as additives in lubricant oils |
| title_sort | engineered silica nanoparticles as additives in lubricant oils |
| topic | engineered hybrid sio2 nanoparticles surface functionalization dispersion stability tribological properties base oil |
| url | http://dx.doi.org/10.1088/1468-6996/16/5/055005 |
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