Superhydrophobic cotton fabric coating based on a complex layer of silica nanoparticles and perfluorooctylated quaternary ammonium silane coupling agent |
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| Authors: | Minghua Yu Wei-Dong Meng |
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| Institution: | a College of Chemistry and Chemical Engineering, Donghua University, 2999 North Remin Road, Songjiang District, Shanghai 201620, China
b Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China |
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| Abstract: | A superhydrophobic complex coating for cotton fabrics based on silica nanoparticles and perfluorooctylated quaternary ammonium silane coupling agent (PFSC) was reported in this article. The complex thin film was prepared through a sol-gel process using cotton fabrics as a substrate. Silica nanoparticles in the coating made the textile surface much rougher, and perfluorooctylated quaternary ammonium silane coupling agent on the top layer of the surface lowered the surface free energy. Textiles coated with this coating showed excellent water repellent property, and water contact angle (CA) increased from 133° on cotton fabrics treated with pure PFSC without silica sol pretreatment up to 145°. The oil repellency was also improved and the contact angle of CH2I2 droplet on the fabric surface reached to 131°. In contrast, the contact angle of CH2I2 on the fabric surface treated with pure PFSC was only 125°. |
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| Keywords: | Sol-gel Perfluoroalkylated compound Superhydrophobicity Cotton fabrics |
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