Rheology of oleogels based on sorbitan and glyceryl monostearates and vegetable oils for lubricating applications
Oleogels based on sorbitan and glyceryl monostearates and different types of vegetable oils, potentially applicable as biodegradable alternatives to traditional lubricating greases, have been studied. In particular, the rheological behavior, by means of small-amplitude oscillatory shear (SAOS) measu...
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| Format: | Article |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
2011-09-01
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| Series: | Grasas y Aceites |
| Subjects: | |
| Online Access: | http://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1331 |
| _version_ | 1818914905236963328 |
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| author | R. Sánchez J. M. Franco M. A. Delgado C. Valencia C. Gallegos |
| author_facet | R. Sánchez J. M. Franco M. A. Delgado C. Valencia C. Gallegos |
| author_sort | R. Sánchez |
| collection | DOAJ |
| description | Oleogels based on sorbitan and glyceryl monostearates and different types of vegetable oils, potentially applicable as biodegradable alternatives to traditional lubricating greases, have been studied. In particular, the rheological behavior, by means of small-amplitude oscillatory shear (SAOS) measurements, and some lubrication performance-related properties (mechanical stability and tribological response) have been evaluated in this work. SAOS response and mechanical stability of these oleogels are significantly influenced by the type and concentration of the organogelator and the vegetable oil used in the formulations. Glyceryl monostearate (GMS) generally produces stronger gels than sorbitan monostearate (SMS). The use of low-viscosity oils, such as rapeseed and soybean oils, yields gels with significantly higher values of the linear viscoelastic functions than oleogels prepared with high-viscosity oils, i.e. castor oil. The rheological behavior of SMS-based oleogels also depends on the cooling rate applied during the gelification process. On the other hand, the oleogels studied present low values of the friction coefficient obtained in a tribological contact, although only some GMS/castor oil-based oleogels exhibit a suitable mechanical stability. |
| first_indexed | 2024-12-19T23:53:48Z |
| format | Article |
| id | doaj.art-e2f2c8172582409b8fc25de240813d32 |
| institution | Directory Open Access Journal |
| issn | 0017-3495 1988-4214 |
| language | English |
| last_indexed | 2024-12-19T23:53:48Z |
| publishDate | 2011-09-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Grasas y Aceites |
| spelling | doaj.art-e2f2c8172582409b8fc25de240813d322022-12-21T20:01:04ZengConsejo Superior de Investigaciones CientíficasGrasas y Aceites0017-34951988-42142011-09-0162332833610.3989/gya.1134101302Rheology of oleogels based on sorbitan and glyceryl monostearates and vegetable oils for lubricating applicationsR. Sánchez0J. M. Franco1M. A. Delgado2C. Valencia3C. Gallegos4Departamento de Ingeniería Química. Facultad de Ciencias Experimentales. Campus de “El Carmen”. Universidad de HuelvaDepartamento de Ingeniería Química. Facultad de Ciencias Experimentales. Campus de “El Carmen”. Universidad de HuelvaDepartamento de Ingeniería Química. Facultad de Ciencias Experimentales. Campus de “El Carmen”. Universidad de HuelvaDepartamento de Ingeniería Química. Facultad de Ciencias Experimentales. Campus de “El Carmen”. Universidad de HuelvaDepartamento de Ingeniería Química. Facultad de Ciencias Experimentales. Campus de “El Carmen”. Universidad de HuelvaOleogels based on sorbitan and glyceryl monostearates and different types of vegetable oils, potentially applicable as biodegradable alternatives to traditional lubricating greases, have been studied. In particular, the rheological behavior, by means of small-amplitude oscillatory shear (SAOS) measurements, and some lubrication performance-related properties (mechanical stability and tribological response) have been evaluated in this work. SAOS response and mechanical stability of these oleogels are significantly influenced by the type and concentration of the organogelator and the vegetable oil used in the formulations. Glyceryl monostearate (GMS) generally produces stronger gels than sorbitan monostearate (SMS). The use of low-viscosity oils, such as rapeseed and soybean oils, yields gels with significantly higher values of the linear viscoelastic functions than oleogels prepared with high-viscosity oils, i.e. castor oil. The rheological behavior of SMS-based oleogels also depends on the cooling rate applied during the gelification process. On the other hand, the oleogels studied present low values of the friction coefficient obtained in a tribological contact, although only some GMS/castor oil-based oleogels exhibit a suitable mechanical stability.http://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1331bio-lubricantsoleogelsrheologyvegetable oils |
| spellingShingle | R. Sánchez J. M. Franco M. A. Delgado C. Valencia C. Gallegos Rheology of oleogels based on sorbitan and glyceryl monostearates and vegetable oils for lubricating applications Grasas y Aceites bio-lubricants oleogels rheology vegetable oils |
| title | Rheology of oleogels based on sorbitan and glyceryl monostearates and vegetable oils for lubricating applications |
| title_full | Rheology of oleogels based on sorbitan and glyceryl monostearates and vegetable oils for lubricating applications |
| title_fullStr | Rheology of oleogels based on sorbitan and glyceryl monostearates and vegetable oils for lubricating applications |
| title_full_unstemmed | Rheology of oleogels based on sorbitan and glyceryl monostearates and vegetable oils for lubricating applications |
| title_short | Rheology of oleogels based on sorbitan and glyceryl monostearates and vegetable oils for lubricating applications |
| title_sort | rheology of oleogels based on sorbitan and glyceryl monostearates and vegetable oils for lubricating applications |
| topic | bio-lubricants oleogels rheology vegetable oils |
| url | http://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1331 |
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