Surface Modification for Dispersion Stability of Novel FAl2O3-POE Nanolubricant Using Functional SiO2

Nugroho, Agus and Rizalman, Mamat and Bo, Zhang and Wan Hamzah, Azmi and Mohd Fairusham, Ghazali and Yusaf, Talal (2023) Surface Modification for Dispersion Stability of Novel FAl2O3-POE Nanolubricant Using Functional SiO2. In: Proceedings of the 2nd Energy Security and Chemical Engineering Congress (ESCHE 2021) , 3-5 November 2021 , Virtual Conference, Universiti Malaysia Pahang, Malaysia. pp. 179-192.. ISBN 978-981-19-4425-3

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The presence of a hydroxyl group on the surface of Al2O3 is responsible for the low level of stability of Al2O3-based nanolubricant. This paper aims to illustrate how the SiO2 functionalization approach can be used to modify the surface of Al2O3 nanoparticles. The effects of four different functionalization treatments on Al2O3 on the dispersion stability of FAl2O3-Polyolester (POE) nanolubricant were found to be significant. There are four samples with SiO2:Al2O3 ratios of 15:85, 30:60, 45:55, and 50:50%, respectively. Each sample was mechanically stirred for 120 min for adsorption process. Then, each sample received a sub-inter critical annealing treatment at 120 °C in the furnace for 180 min, after which the samples were chilled using the gradual cooling approach to avoid thermal shock on the FAl2O3 nanoparticle surface. Newly synthesized FAl2O3 was dispersed in POE lubricant for 30 min with a magnetic stirrer and then ultrasonicated for 100 min to prevent agglomeration. On day 1 and day 15, dispersing stability was examined using the UV visible spectrophotometry method to verify the wettability of FAl2O3 nanoparticles enhancement. The results reveal that increasing the SiO2 ratio in the functionalization process enhances the dispersion stability of FAl2O3-POE nanolubricant. The findings suggest that FAl2O3-POE sample with a 50:50 ratio has the best dispersion stability, as shown by the highest absorbance ratio value of 0.945.

Item Type: Conference or Workshop Item (Lecture)
Additional Information: Lecture Notes in Mechanical Engineering (LNME),
Uncontrolled Keywords: Alumina surface modification, Functionalized Al2O3, FAl2O3 Dis-persion stability, FAl2O3-POE nanolubricant
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Institute of Postgraduate Studies
College of Engineering
Depositing User: Noorul Farina Arifin
Date Deposited: 07 Oct 2022 01:44
Last Modified: 07 Oct 2022 01:44
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