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Keywords = dynamic magnetowetting

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13 pages, 22029 KiB  
Article
Magnetic Nanofluid Droplet Impact on an AAO Surface with a Magnetic Field
by Yu-Chin Chien and Huei Chu Weng
Appl. Sci. 2018, 8(7), 1059; https://doi.org/10.3390/app8071059 - 29 Jun 2018
Cited by 9 | Viewed by 4057
Abstract
This paper presents an experimental study on the impact of magnetic nanofluid droplets on aluminum sheet surfaces subjected to a magnetic field. A magnetic nanofluid was prepared by synthesizing Fe3O4 nanoparticles and coating amounts of oleic acid surfactant in deionized [...] Read more.
This paper presents an experimental study on the impact of magnetic nanofluid droplets on aluminum sheet surfaces subjected to a magnetic field. A magnetic nanofluid was prepared by synthesizing Fe3O4 nanoparticles and coating amounts of oleic acid surfactant in deionized water. The wettability of an alumina sheet was first changed by using a phosphoric acid (H3PO4) solution to perform the first anodic oxidation process. A contact angle meter and a high-speed camera were then, respectively, used to capture the static contact angle of magnetic nanofluid droplets and their dynamic characteristics during impact on the surface with/without anodic oxidation process. The results of the static contact angle showed that a more hydrophilic surface could be obtained after the sheet was processed. The dynamic images showed that the processed surface exhibited a slightly greater degree of adhesion between the liquid and solid without a magnetic field. The effect of AAO surface topography can be significant under the action of an external magnetic field. Full article
(This article belongs to the Special Issue Selected Papers from the 2017 International Conference on Inventions)
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