Optimization On The Nanoparticle Stability In Liquid Phased Condition By Using Taguchi Analysis

Othman, Aimanezmir (2017) Optimization On The Nanoparticle Stability In Liquid Phased Condition By Using Taguchi Analysis. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The problem arises from the application of nanofluid is that the nanoparticles tend to agglomerate. The agglomeration gives impacts to the properties of nanofluid and the heat transfer performance. Agglomeration and sedimentation are the critical phenomena that affect the stability of nanofluid. The aim of the study is to investigate the effect of different surfactant agents and homogenize time on the stability of nanoparticle (SAE 15W 40). In this study, the nano-oil was prepared by dispersing the nanoparticles with an optimal composition of 0.5 vol.% 70 nm graphite, Al2O3 and ZrO2 in conventional engine oil (SAE 15W 40) grade by using ultrasonic homogenizer for 10-30 minutes. In order to determine the stability of the dispersion, Oleic Acid, SDBS Salt, and Sodium chloride were utilized as a surfactant agent with an optimal composition of 0.3 vol.%. The stability test was conducted using UV-spectrometer. The qualitative test of nanofluid was also being performed through the observation of sedimentation by using the traditional method. The collected data was analyzed by using the Taguchi method to determine the optimum value of nanoparticle stability. The absorbance value of nano-oil was measured using UV-Vis spectrometer as quantitative results and the data was verified by using Taguchi analysis. The sample was also being observed periodically by capturing the image of the nano-oil as qualitative results. The results of Taguchi analysis show that the zirconia nanoparticle with SDBS agent is most stable compared with another sample. Unfortunately, Taguchi analysis analyzed the alumina nanoparticle with the oleic acid agent is a less stable sample.

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