Fabrication of CP-Ti structure with controllable wettability using powder bed fusion and eco-friendly post-process

Hydrophobic surfaces have a wide range of applications, such as water harvesting, self-cleaning, and anti-biofouling. However, traditional methods of achieving hydrophobicity often involve the use of toxic materials such as fluoropolymers. This study aims to create controllable wettability surfaces...

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Bibliographic Details
Published in:Scientific reports 2024-02, Vol.14 (1), p.4633-4633, Article 4633
Main Authors: Oh, Won-Jung, Kim, Donghyun, Kim, Dong-Hyun, Chun, Doo-Man, Ha, Jeonghong, Kim, Chung-Soo
Format: Article
Language:English
Subjects:
639/166/898
639/166/988
Biofouling
Contact angle
Fabrication
Hazardous materials
Humanities and Social Sciences
Hydrophobic surface
Hydrophobic surfaces
Hydrophobicity
multidisciplinary
Oils & fats
Powder bed fusion
Science
Science (multidisciplinary)
Silicone oil coating
Silicones
Surface properties
Toxic materials
Water harvesting
Wettability control
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Summary:Hydrophobic surfaces have a wide range of applications, such as water harvesting, self-cleaning, and anti-biofouling. However, traditional methods of achieving hydrophobicity often involve the use of toxic materials such as fluoropolymers. This study aims to create controllable wettability surfaces with a three-dimensional geometry using a laser base powder bed fusion (PBF) process with commercially pure titanium (CP-Ti) and silicone oil as non-toxic materials. The optimal PBF process parameters for fabricating micropillar structures, which are critical for obtaining the surface roughness necessary for achieving hydrophobic properties, were investigated experimentally. After fabricating the micropillar structures using PBF, their surface energy was reduced by treatment with silicone oil. Silicone oil provides a low-surface-energy coating that contributes to the water-repellent nature of hydrophobic surfaces. The wettability of the treated CP-Ti surfaces was evaluated based on the diameter of the pillars and the space between them. The structure with the optimal diameter and spacing of micropillars exhibited a high contact angle (156.15°). A pronounced petal effect (sliding angle of 25.9°) was achieved because of the morphology of the pillars, indicating the controllability of wetting. The micropillar diameter, spacing, and silicone oil played crucial roles in determining the water contact and sliding angle, which are key metrics for surface wettability.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-024-54958-1