Superhydrophobic surfaces prepared from water glass and non-fluorinated alkylsilane on cotton substrates

• DOI: 10.1016/j.apsusc.2007.08.083
• Publication Date: 2007-09-04T12:42:51Z
• Authors: Zhengxiong Li; Yanjun Xing; Jinjin Dai
• Keywords: Superhydrophobic coating; Dip-coating; Morphology

Abstract Superhydrophobic surfaces have been successfully prepared by sol–gel method using water glass as starting material. Such surfaces were obtained first by dip-coating the silica hydrosols prepared via hydrolysis and condensation of water glass onto cotton substrates, then the surface of the silica coating was modified with a non-fluoro compound, hexadecyltrimethoxysilane (HDTMS), to gain a thin film through self-assembly, superhydrophobicity with a water contact angle higher than 151° can be achieved. The morphology and surface roughness were characterized by SEM and AFM.