Abstract
Surface hydrophobicity is a significant characteristic of a surface which proves to be a deciding factor for applications in domains such as lubrication retention, wear reduction, self-cleaning properties, fluid drag determination, etc. Texturing a surface governs the surface energy which influences the hydrophobicity of a material. Low surface energy and surface texture with microdimpling has proved to be favorable for enhancing hydrophobicity. In this study, experimental evaluation of texture induced hydrophobicity has been carried out to quantify impact of critical parameters on surface hydrophobicity. The experimentation involved laser texturing of HSS disks to create circle, triangle, and square shaped microdimpled surfaces. The microtextured disks were individually subjected to a drop of distilled water, and drop profile was observed for a time span ranging 0–30 s, to determine the most optimum surface exhibiting the highest contact angle. Among the textured disks subjected to experimentation, it was found that the disk with triangular shaped dimples having parameters (dimple density = 10% and dimple area = 0.01mm2) has displayed maximum hydrophobicity (Contact Angle = 112.6°). Experimentation results confirm that nontextured surfaces are least hydrophobic as compared to either of the textured surfaces, namely circle, triangle and square shaped microdimples. Micro-texturing of HSS surfaces can improve the hydrophobic properties for desired applications.
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A. Singh, D.S. Patel, J. Ramkumar, K. Balani, Single step laser surface texturing for enhancing contact angle and tribological properties. Int. J. Adv. Manuf. Technol. 100, 1253–1267 (2019). https://doi.org/10.1007/s00170-018-1579-8
M. Jamali, H.V. Tafreshi, B. Pourdeyhimi, Droplet mobility on hydrophobic fibrous coatings comprising orthogonal fibers. Langmuir 34, 12488–12499 (2018). https://doi.org/10.1021/acs.langmuir.8b02810
C. Kunz, J. Bonse, D. Spaltmann, C. Neumann, A. Turchanin, J.F. Bartolomé, F.A. Müller, S. Gräf, Tribological performance of metal-reinforced ceramic composites selectively structured with femtosecond laser-induced periodic surface structures. Appl. Surf. Sci. 499, 143917 (2020). https://doi.org/10.1016/j.apsusc.2019.143917
D.I. Yu, S.W. Doh, H.J. Kwak, H.C. Kang, H.S. Ahn, H.S. Park, M. Kiyofumi, M.H. Kim, Wetting state on hydrophilic and hydrophobic micro-textured surfaces: Thermodynamic analysis and X-ray visualization. Appl. Phys. Lett. 106, 1–6 (2015). https://doi.org/10.1063/1.4919136
P. Krishna Kumar, A. Sathish Kumar, Investigation of frictional characteristics of laser textured aluminium 6061 and aluminium 7071 alloys under dry sliding conformal contact in pin on disc tribometer. Mater. Today Proc. (2020). https://doi.org/10.1016/j.matpr.2020.02.735
M.D. Nikam, D. Shimpi, K. Bhole, S.A. Mastud, Design and development of surface texture for tribological application. Key Eng. Mater. (2019). https://doi.org/10.4028/www.scientific.net/KEM.803.55
A.B.D. Cassie, S. Baxter, Wettability of porous surfaces. Trans. Faraday Soc. (1944). https://doi.org/10.1039/tf9444000546
R.N. Wenzel, Resistance of solid surfaces to wetting by water. Ind. Eng. Chem. 28, 988–994 (1936). https://doi.org/10.1021/ie50320a024
A. Al-Sharafi, H. Ali, B.S. Yilbas, A.Z. Sahin, M. Khaled, N. Al-Aqeeli, F. Al-Sulaiman, Influence of thermalcapillary and buoyant forces on flow characteristics in a droplet on hydrophobic surface. Int. J. Therm. Sci. 102, 239–253 (2016). https://doi.org/10.1016/j.ijthermalsci.2015.11.013
W. Huang, L. Jiang, C. Zhou, X. Wang, The lubricant retaining effect of micro-dimples on the sliding surface of PDMS. Tribol. Int. 52, 87–93 (2012). https://doi.org/10.1016/j.triboint.2012.03.003
W. Zhang, R. Zhang, C. Jiang, C. Wu, Effect of pillar height on the wettability of micro-textured surface: volume-of-fluid simulations. Int. J. Adhes. Adhes. 74, 64–69 (2017). https://doi.org/10.1016/j.ijadhadh.2016.12.011
W. Qing, X. Li, Y. Wu, S. Shao, H. Guo, Z. Yao, Y. Chen, W. Zhang, C.Y. Tang, In situ silica growth for superhydrophilic-underwater superoleophobic Silica/PVA nanofibrous membrane for gravity-driven oil-in-water emulsion separation. J. Memb. Sci. 612, 118476 (2020). https://doi.org/10.1016/j.memsci.2020.118476
M. Kumar, R. Bhardwaj, Wetting characteristics of Colocasia esculenta (Taro) leaf and a bioinspired surface thereof. Sci. Rep. 10, 1–15 (2020). https://doi.org/10.1038/s41598-020-57410-2
A. Rosenkranz, H.L. Costa, F. Profito, C. Gachot, S. Medina, D. Dini, Influence of surface texturing on hydrodynamic friction in plane converging bearings—an experimental and numerical approach. Tribol. Int. 134, 190–204 (2019). https://doi.org/10.1016/j.triboint.2019.01.042
S. Kunar, B. Bhattacharyya, Electrochemical microsurface texturing with reusable masked patterned tool. Eng. Sci. Technol. Int. J. 21, 1095–1103 (2018). https://doi.org/10.1016/j.jestch.2018.08.001
M. Pang, X. Liu, K. Liu, Effect of wettability on the friction of a laser-textured cemented carbide surface in dilute cutting fluid. Adv. Mech. Eng. 9, 1–9 (2017). https://doi.org/10.1177/1687814017738154
A.O. Ijaola, E.A. Bamidele, C.J. Akisin, I.T. Bello, A.T. Oyatobo, A. Abdulkareem, P.K. Farayibi, E. Asmatulu, Wettability transition for laser textured surfaces: a comprehensive review. Surf. Interfaces 21, 100802 (2020). https://doi.org/10.1016/j.surfin.2020.100802
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Manoj Nikam: Student; Tribeni Roy: Research Associate; Sachin Mastud: Associate Professor and Head of Department.
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Nikam, M., Roy, T. & Mastud, S. Wettability Analysis of Hydrophobic Micro-dimpled HSS Surfaces. J. Inst. Eng. India Ser. D (2021). https://doi.org/10.1007/s40033-021-00269-y
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DOI: https://doi.org/10.1007/s40033-021-00269-y