Investigating the Effect of Hydrophilic Surface Modification on Droplet Evaporation

Shen Chun Wu; Sin Jie Lin; Dawn Wang; Yau Ming Chen

doi:10.4028/www.scientific.net/AMR.1120-1121.779

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Investigating the Effect of Hydrophilic Surface Modification on Droplet Evaporation

Abstract:

In this study, surface modification of stainless steel flat plates was performed using nanoscale bilayers assembly method to increase the surface’s hydrophilicity and enhance evaporation. Thin layers of SiO₂nanoparticles layered onto the stainless steel surfaces were used to modify their surface properties, and the relationship between the number of layers (0~20) and water’s hydrophilicity (surface tension) was investigated. The effects of modification on evaporation were then tested using de-ionized water. According to experimental results, surface modification was able to reduce the contact angle of water on stainless steel flat plate from the unmodified 87o to 7o at 18 layers, significantly increasing the hydrophilicity of the surface. Evaporation experiments show that the evaporation heat transfer enhancement for droplets on stainless steel plates is at least 300%.Keywords: bilayers assembly, hydrophilicity, surface modification, evaporation performance

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Periodical:

Advanced Materials Research (Volumes 1120-1121)

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779-784

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https://doi.org/10.4028/www.scientific.net/AMR.1120-1121.779

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Online since:

July 2015

Authors:

Shen Chun Wu*, Sin Jie Lin, Dawn Wang, Yau Ming Chen

Keywords:

Bilayers Assembly, Evaporation Performance, Hydrophilicity, Surface Modification

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