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Hydrophobicity modification of woven cotton fabric by hydrophobic fumed silica coating

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Abstract

Water repellency of woven cotton fabric was achieved by coating with the aqueous dispersion containing organosilane agent (HDTMS) and fumed silica. The coating agents were applied using padding method and then followed by batching the coated fabric at the ambient temperature for 24 h to allow the condensation reaction between HDTMS silanol group and fumed silica silanol group, rendering silica particles hydrophobic. An ultrasonicator was employed to prepare the homogenous coating dispersion. The water repellency evaluated by water contact angle determination which showed the contact angle over 110° was obtained with low amount of applied HDTMS of 1 wt%. The effect of fumed silica addition on an increase in fiber surface roughness geometry showed the influential result in improving the water contact angle. From durability to washing test, the hydrophobic coatings evidenced from SEM and ATR/FTIR remained adhering to fiber surface, indicating the durability. After washing, the coating on the fabric with fumed silica addition appeared to be scatter particles which made a contribution to the higher contact angle value when compared to sheet-like layer coating in case of HDTMS coating alone.

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Acknowledgment

The authors would like to acknowledge the Graduate School Chulalongkorn University for financial support.

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Authors and Affiliations

  1. Department of Materials Science, Faculty of Science, Chulalongkorn University, Phayathai Road, Bangkok, 10330, Thailand

    Thanwarat Pipatchanchai & Kawee Srikulkit

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  1. Thanwarat Pipatchanchai
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  2. Kawee Srikulkit
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Correspondence to Kawee Srikulkit.

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Pipatchanchai, T., Srikulkit, K. Hydrophobicity modification of woven cotton fabric by hydrophobic fumed silica coating. J Sol-Gel Sci Technol 44, 119–123 (2007). https://doi.org/10.1007/s10971-007-1609-8

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  • DOI: https://doi.org/10.1007/s10971-007-1609-8

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