A., Nugroho and Z., Bo and R., Rizalman and W. H., Azmi and G., Najafi and F., Khoirunnisa (2021) Extensive examination of sonication duration impact on stability of Al2O3-Polyol ester nanolubricant. International Communications in Heat and Mass Transfer, 126 (105418). pp. 1-14. ISSN 0735-1933. (Published)
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Abstract
The sonication technique is one of the effective methods to stabilize nanolubricants. This paper aims to elaborate on the sonication duration’s impact on the stability of Al2O3-Polyol ester nanolubricants. A two-step method has been performed to prepare nanolubricants. Each sample consisted of a nanoparticle mixed with POE using a magnetic stirrer without surfactant for 30 min. All samples had the same volume concentration, namely 0.02 vol % but received different interlude sonication duration treatments for 0, 40, 60, 80, 100, and 120 min. FESEM with Energy Dispersive X-Ray was used to characterize the Al2O3 nanoparticle sample’s morphology and element analysis. UV Visible and absolute zeta potential were used to determine Al2O3-POE nanolubricants stability. The findings show that the most optimal sonication impact in this study is 80-min sonication. It proofed by the highest absorbance ratio among other samples, which is 0.411, the lowest drop absorbance value, which is 58.9%, and and with a zeta potential value of 45 mV. The rheological behavior analysis shows that Al2O3-POE nanolubricants show Newtonian behavior.
| Item Type: | Article |
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| Uncontrolled Keywords: | Absorbance, Al2O3 nanoparticles, Al2O3-POE nanolubricants, UV visible, Sonication |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Faculty/Division: | College of Engineering Institute of Postgraduate Studies |
| Depositing User: | Dr. Wan Azmi Wan Hamzah |
| Date Deposited: | 10 May 2022 01:31 |
| Last Modified: | 18 Aug 2022 03:26 |
| URI: | http://umpir.ump.edu.my/id/eprint/33994 |
| Download Statistic: | View Download Statistics |
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