Fluorine free superhydrophobic surface textured silica particles and its dynamics–Transition from impalement to impingement

• Published in: Journal of alloys and compounds Vol. 711; pp. 197 - 204
• Main Authors: Anitha, C., Azim, S. Syed, Mayavan, Sundar
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.07.2017; Elsevier BV
• Subjects: Fluorine; Fluorine-free; Hydrophobic surfaces; Impingement; Rice husk; Silane; Silica; Silicon dioxide; Superhydrophobic; Wetting; Wetting nature; Wetting nature; Rice husk; Fluorine-free; Superhydrophobic; Silane
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2017.03.338

We report a facile method towards synthesis of fluorine free superhydrophobic mesoporous silica particles. Silica particles were prepared from rice husk (RH) as the silica source and CTAB as the structure directing agent. The as-prepared hydrophilic silica particles were converted to superhydrophobic structures by silane treatments. Silane treatment enhanced the wetting nature of the silica material from 60° to <150° and resulted in superhydrophobicity. Silica particles were prepared from rice husk which were functionalized with silane, free of fluorine tends to show superhydrophobic behaviour. Bouncing behaviour of the prepared particles was studied. Rice leaf shows anisotropic superhydrophobicityinterestingly, the silica extracted from rice husk after functionalization also reflects superhydrophobicity. Thus, the alpha and omega of rice plant shows superhydrophobicity. [Display omitted] •Fluorine free superhydrophobic mesoporous silica particles were prepared form rice by facile synthesis step.•Silane treatment enhanced the wetting nature of the silica from 60° to <150° and resulted in superhydrophobicity.•Impact dynamics of water droplet on functionalized silica substrate had been explored in this study.