Isomer effect on chemical reactivity and superhydrophobicity of chlorosilane modified SiO <inf>2</inf> nanoparticles prepared by one-step reaction

• Main Authors: A. Sriboonruang, T. Kumpika, E. Kantarak, W. Sroila, P. Singjai, N. Lawan, S. Muangpil, W. Thongsuwan
• Format: Journal
• Published: 2019
• Subjects: Engineering; Materials Science; Physics and Astronomy
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85064165780&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/65591
• Institution: Chiang Mai University

© 2019 Superhydrophobic (SH) silica (SiO 2 ) nanoparticles (NPs) were successfully synthesized through a simple and facile technique. The effect of chlorosilane isomers was investigated by the grafting of butyltrichlorosilane (C4But) and dichloro (3-chloropropyl) methylsilane (C4Di) on superhydrophilic SiO 2 NPs. The SEM results displayed that the particle size of C4Di modified SiO 2 (C4Di-SiO 2 ) NPs was larger than C4But modified SiO 2 (C4But-SiO 2 ). This can be due to the steric effect of the methyl group on the C4Di segment. The wetting analysis revealed that C4Di-SiO 2 cannot reach SH criteria as it showed a water contact angle (WCA) of 149° and a sliding angle (SA) over 10°, while C4But-SiO 2 showed a SH surface with a WCA of 159° and SA of 2°. Interestingly, the modified SiO 2 NPs created a transparent film on the glass substrate which is a key opportunity for self-cleaning application.