Chiang Mai Journal of Science

Adhesion Mechanism of Different Alkyltrichlorosilanes Enhanced Superhydrophobicity on Superhydrophilic SiO2 Film Prepared by Dip Coating

Paper Type	Contributed Paper
Title	Adhesion Mechanism of Different Alkyltrichlorosilanes Enhanced Superhydrophobicity on Superhydrophilic SiO2 Film Prepared by Dip Coating
Author	Atchara Sriboonruang, Tewasin Kumpika, Ekkapong Kantarak, Wattikon Sroila, Pisith Singjai, Narin Lawan, Sairoong Muangpil and Wiradej Thongsuwan
Email	wiradej.t@cmu.ac.th
Abstract: Superhydrophilic silica (SiO2) nanoparticles (NPs) were successfully modified superhydrophobic SiO2 NPs via a facile one-step reaction technique. The modified SiO2 NPs with different alkyltrichlorosilanes (ATCS) were then coated on a glass substrate by dip-coating process. The effect of different ATCS chain lengths such as methyltrichlorosilane (C1), butyltrichlorosilane (C4), and octadecyltrichlorosilane (C18) on superhydrophobicity was investigated. The result showed the particle sizes of modified SiO2 NPs slightly increases with the chain length. Likewise, the water contact angle (WCA) of C1, C4 and C18 modified SiO2 NPs were 156º, 159º and 160º. Furthermore, the sliding angle (SA) of all the modified SiO2 NPs are less than 3º. It is clearly indicated that ATCS with different chain lengths modified SiO2 NPs were superhydrophobic. Interestingly, ATCSs modified SiO2 NPs have high transparency with optical transmittance greater than 80%. This is a key opportunity for self-cleaning applications.
Start & End Page	823 - 828
Received Date	2019-07-26
Revised Date	2019-11-16
Accepted Date	2019-11-23
Full Text	Download
Keyword	superhydrophobic, superhydrophilic, alkyltrichlorosilane, SiO2, nanoparticles
Volume	Vol.47 No.4 (Special Issue II : July 2020)
DOI
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