Possibility of using coal soot as masking material in the creation of supper- hydrophobic surfaces

Abstract

Hydrophobic and super-hydrophobic surfaces have a wide of range applications in various fields. Coating a surface to make it water repellent has a topic of researched in recent years. For this purpose, octadecyltrichlorosilane is one of the common major materials being used to coat glass surfaces. However, super-hydrophobicity has not been achieved using OTS alone. In this study, coal soot is being utilized to reionforce OTS in the creation of a coated surface that possesses both super-hydrophobicity and acceptable durability. In addition, tetraethyl orthosilicate is used as a primer to create a three dimensional polyethylsiloxane network to trap air pockets. The effects of two different coating techniques, spraying and immersing on the quality and the appearance of the hydrophobic coating were studied in this report. Water contact angle measurements and optical transmittance of the coated glass slides will be used to evaluate the initial hydrophobicity and appearance of the coatings. We have successfully utilized the coating process to achieve a coating that is super-hydrophobic, relatively transparent and durable. Keywords: super-hydrophobicity, Octadecyltrichlorosilane, coal soot, Tetraethyl orthosilicate, water contact angle, stability.