Abstract
The binary superhydrophobic–superhydrophilic surface has been successfully achieved by a combination of nanoscale texture roughness on micro-textured cotton thread network by layer-by-layer deposition method through the single-step sol–gel route. Furthermore, microstructures with improved wettability were produced, in which silica nanotextures were grown without modifying the chemical method to form superoleophilic and superhydrophobic networks. A superoleophilic surface (oil contact angle 0°) and a superhydrophobic coated cotton fabric with surface free energy of γ total = 13. 23 ± 0.37 mJ m−2 (water contact angle of 167 ± 1° and a small sliding angle of 4 ± 1°) were successfully obtained. The results were exemplified here by the creation of immiscible oils separation membranes, and the innumerable applications of this technology also include self-cleaning fabrics, antistaining fabrics, water purification, and antiwetting fabrics for military applications.
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The author acknowledges the Department of Physics, Shivaji University, Kolhapur, India, for providing experimental facility.
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Mahadik, S.A., Pedraza, F.D., Relekar, B.P. et al. Synthesis and characterization of superhydrophobic–superoleophilic surface. J Sol-Gel Sci Technol 78, 475–481 (2016). https://doi.org/10.1007/s10971-016-3974-7
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DOI: https://doi.org/10.1007/s10971-016-3974-7