Two Step Method for Fabrication of Superhydrophobic Aluminum Surface
摘要
Fabrication of superhydrophobic metallic surface is an emerging area of research for enhancing the condensation rate in atmospheric water generators (AWGs). In this manuscript, two step method is proposed for the fabrication of superhydrophobic aluminum surface. The contact angle and its hysteresis of the water droplet were measured, revealing a contact angle of 150° ± 1.5° with hysteresis of 7.5° ± 2°. The elemental analysis of fabricated superhydrophobic was carried out using energy dispersive X-ray spectroscopy (EDAX), indicating the presence of Si, C, F, and O over the surface of aluminum. In addition, durability of the fabricated superhydrophobic surface and its applicability for moist air condensation were analyzed. The present results show the surface is stable for the range of contact angle of 142 ± 3° for a year. The spatial–temporal pattern of condensation shows that the droplet frequently grows and slides-off for re-exposing the surface for re-nucleation with respect to aging of surface.