Abstract
Recently, hydrophobic and superhydrophobic natural surfaces have attained great attention due to their diverse properties. It was found that micro-geometrical features on these natural surfaces have a great influence on generating hydrophobicity. Butterfly and Cicada wings are commonly studied natural hydrophobic surfaces for bio-mimicking and their microstructures are simplified into micro-grooves and micro-pillars, respectively. In the present study, a nanosecond fiber laser is used to produce these micro-geometries on stainless steel AISI 304 surface and its effect on surface wettability is investigated. Experimental results show that fabricated micro-geometries have a wetting transition from hydrophilic to the hydrophobic state over time. In this study, a good hydrophobic surface with a large apparent contact angle of 120° is obtained with 150, 200 µm step size micro-groove geometry on day-29 and micro-pillar geometry with 200 µm step size attained the highest contact angle of 118° on day-4. The contact angle of the non-textured parent material surface is 75°.
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Chilaparapu Venkata Vamsi, Vimal Thomas, Govindaraju, M. (2020). Influence of Laser-Machined Micro-geometrical Features on the Surface Wettability of Stainless Steel 304. In: Deepak, B., Parhi, D., Jena, P. (eds) Innovative Product Design and Intelligent Manufacturing Systems. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-15-2696-1_39
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DOI: https://doi.org/10.1007/978-981-15-2696-1_39
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