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Effect of Dispersion Method on Stability and Dielectric Strength of Transformer Oil-Based TiO 2 Nanofluids

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ABSTRACT

Dispersion stability of nanoparticles in the liquid media is of great importance to the utilization in practice. This study aims to investigate the effects of mechanical dispersion method on the dispersibility of functionalized TiO2 nanoparticles in the transformer oil. Dispersion methods, including stirring, ultrasonic bath, and probe processes, were systematically tested to verify their versatility for preparing stable nanofluid. The test results reveal that the combination of ultrasonic bath process and stirring method has the best dispersion efficiency and the obtained nanofluid possesses the highest AC breakdown strength. Specifically, after aging for 168 h, the size of nanoparticles in the nanofluid prepared by the combination method has no obvious change, while those obtained by the other three paths are increased obviously.

No MeSH data available.


Nanoparticle size vs. dispersion method in the fresh and aged nanofluids for 168 h
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Fig7: Nanoparticle size vs. dispersion method in the fresh and aged nanofluids for 168 h

Mentions: Based on the obtained results, we can see that the stirring and ultrasonic bath processes show better dispersion efficiency than ultrasonic probe process. So, the combination of these two methods under their optimum condition was used to prepare nanofluid with the same loading of functionalized nanoparticles. The average size of nanoparticle in the obtained fresh nanofluid and aged nanofluid for 168 h is shown in Fig. 7 and compared with those obtained by other three methods.Fig. 7


Effect of Dispersion Method on Stability and Dielectric Strength of Transformer Oil-Based TiO 2 Nanofluids
Nanoparticle size vs. dispersion method in the fresh and aged nanofluids for 168 h
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5121108&req=5

Fig7: Nanoparticle size vs. dispersion method in the fresh and aged nanofluids for 168 h
Mentions: Based on the obtained results, we can see that the stirring and ultrasonic bath processes show better dispersion efficiency than ultrasonic probe process. So, the combination of these two methods under their optimum condition was used to prepare nanofluid with the same loading of functionalized nanoparticles. The average size of nanoparticle in the obtained fresh nanofluid and aged nanofluid for 168 h is shown in Fig. 7 and compared with those obtained by other three methods.Fig. 7

View Article: PubMed Central - PubMed

ABSTRACT

Dispersion stability of nanoparticles in the liquid media is of great importance to the utilization in practice. This study aims to investigate the effects of mechanical dispersion method on the dispersibility of functionalized TiO2 nanoparticles in the transformer oil. Dispersion methods, including stirring, ultrasonic bath, and probe processes, were systematically tested to verify their versatility for preparing stable nanofluid. The test results reveal that the combination of ultrasonic bath process and stirring method has the best dispersion efficiency and the obtained nanofluid possesses the highest AC breakdown strength. Specifically, after aging for 168 h, the size of nanoparticles in the nanofluid prepared by the combination method has no obvious change, while those obtained by the other three paths are increased obviously.

No MeSH data available.