Investigation on stability of tri-hybrid nanofluids in water-ethylene glycol mixture

1st International Postgraduate Conference on Mechanical Engineering

工业技术（总论）;机械制造

Ramadhan, A.I.^1^2 ; Azmi, W.H.^1 ; Mamat, R.^1 ; Hamid, K.A.^1 ; Norsakinah, S.^1

Faculty of Mechanical Engineering, Universiti Malaysia Pahang, Pekan, Pahang

26600, Malaysia^1

Department of Mechanical Engineering, Faculty of Engineering, Universitas Muhammadiyah Jakarta, Jakarta

10510, Indonesia^2

关键词: Concentration ratio;    Data concentration;    Liquid containing;    Potential evaluation;    Sonication time;    Visual stabilities;    Volume concentration;    Water ethylene glycol mixtures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/469/1/012068/pdf
DOI  :  10.1088/1757-899X/469/1/012068

学科分类：工业工程学

来源: IOP

【 摘 要 】

Nanofluid is a suspension of liquid containing metal or non-metallic nanoparticles of typical size (1-100 nm) dispersed into the base liquid. Hybrid or composite nanofluids is considered an extension of research work for single nanofluids, which can be carried out through a combination of two or more different nanoparticles - either in mixed or dispersed composites in liquids. The objective of this study is to investigate the stability of tri-hybrid nanofluids suspended in Water-Ethylene Glycol (EG) mixture. The tri-hybrid nanofluids were prepared at a volume concentration of 0.05 to 0.3% using the two-step method. Three types of nanoparticles used namely Al2O3, TiO2 and SiO2, and dispersed in a base fluid of water/EG. The investigation on the stability of the hybrid nanofluids in the present study is conducted through UV-Vis, zeta-potential, sedimentation and micrograph observation. The findings from the investigations on the visual stability of sedimentation show that the differences in concentration (0.05, 0.1, 0.2, 0.3%) have been low in day 14. It was found that 10 h sonication time is the most suitable period for sonication to obtain a stable suspension. Comparison of data concentration ratio to sedimentation for single, hybrid and tri-hybrid nanofluids presents tri-hybrid nanofluids remains stable with a concentration ratio of 80%. Zeta potential evaluation conducted for the tri-hybrid nanofluids obtained the value of 25.1 mV in the classification of good stability. It can be concluded that the tri-hybrid nanofluids were successfully prepared and achieved good stability.