Preparation of Biomimetic Superhydrophobic Silica/Polyurethane Composite Coating

Abstract:

The SiO₂/PU composite coatings were prepared by the bionic methods. First, nanosilica (SiO₂) was prepared by sol-gel method using tetraethyl orthosilicate (TEOS) as the precursor. Then, by a simple spray process. The formation mechanism and the structure characteristics of the coating were analyzed. The coating surface was characterized using scanning electron microscopy (SEM). The effect of the content of the SiO₂ and the dosage of PU and PEAC on the coating structure and contact angle was also studied. The results show that the coating surface has the similar micro-nanostructure with a lotus leaf, and the SiO₂ content is 9%, the total content of PU and PEAC is 15%, that the contact angle of coating can reach 161°and rolling angle can reach 3°, and that the SiO₂/PU composite coating possesses good super-hydrophobic properties.

• Periodical: Advanced Materials Research (Volumes 785-786)
• Pages: 974-977
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.785-786.974
• Online since: September 2013
• Authors: Hua Bing Yu*, Rui Feng Li
• Keywords: Biomimetic, Micro/Nanostructure, Sol-Gel Method, Superhydrophobic Coating

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DOI: 10.1016/j.cis.2008.10.003