A Comprehensive Investigation of Low Proportion TiO2-POE Nanolubricant Stability for Residential Air Conditioning System Application

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Agus Nugroho, Rizalman Mamat, Zhang Bo, Wan Azmi Wan Hamzah, Talal Yusaf, Mohd Fairusham Ghazali, Fitri Khoerunnisa

2023 Lecture Notes in Mechanical Engineering Conference paper Cited by 8 SDG 17SDG 7 Quartile

Abstract

The paper aims to expound on the comprehensive experimental investigation of the stability of TiO2-Polyolester (POE) nanolubricant. A magnetic stirrer was used to disperse TiO2 nanopowder into POE lubricant for 30 min. The six samples were then subjected to various ultrasonication treatments lasting 40-, 60-, 80-, 100-, and 120-min. Stability analysis was performed in three stages: visual observation, Ultra Violet (UV) visible spectrophotometric analysis, and measurement of the absolute zeta potential. The results showed that sample without ultrasonication treatment had substantial agglomeration as compared to other samples. The absorbance ratio of the sample without ultrasonication treatment is 0.33. The absorbance ratio value escalated as the duration of the ultrasonication treatment on the sample increases. After ultrasonication treatment for 40–120 min, the absorbance ratio increased by 34–117%. The samples treated with 120 min of ultrasonication showed the highest level of stability, as evidenced by the high absorbance ratio and zeta potential values of 0.95 and −80.48 mV, respectively. As a result, the findings suggests that TiO2-POE with ultrasonication treatment for 120 min could generate the excellent stability compared to other samples in this experiment. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

Affiliations

School of Mechanical Engineering, Ningxia University, Yinchuan, China; College of Engineering, Universiti Malaysia Pahang, Pahang, Pekan, 26600, Malaysia; School of Engineering and Technology, Central Queensland University, Rockhampton, 4702, Australia; Centre for Research in Advanced Fluid & Processes, Universiti Malaysia Pahang, Lebuhraya Tun Razak, Pahang, Gambang, Kuantan, 26300, Malaysia; Department of Chemistry, Indonesia University of Education, Bandung, Indonesia

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