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<p>Functional superhydrophobic coatings have attracted considerable attention because of their potential for a wide range of applications. In this study, a novel cyclotetrasiloxane-based hybrid superhydrophobic modifier (F-D<sub>4</sub>) was prepared for the first time using a mild thiolene click reaction of 2,4,6,8-tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane (Vi-D<sub>4</sub>) with perfluorohexylethanethiol (PFOT) and mercaptopropyltrimethoxysilane (MPTMS) as the raw materials. Then, F-D<sub>4</sub> was introduced into the fabric <i>via</i> a sol-gel process, resulting in a superhydrophobic fabric (F-D<sub>4</sub>-Fabric). The surface characteristics of the modified fabric were determined using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and water contact angle (WCA). The coated fabrics have outstanding mechanical, physical, and chemical stability, and exhibit excellent self-cleaning and anti-fouling properties. Owing to its superhydrophobicity, F-D<sub>4</sub>-Fabric could efficiently separate a range of oil/water mixtures with a separation efficiency of up to 99.99%. The study showed that the modification strategy used in the dip-coating process greatly affected the superhydrophobicity of the cotton fabric, which is useful for oil/water separation and self-cleaning applications.</p>

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Rational Design and Fabrication of Cyclotetrasiloxane-based Hybrid Superhydrophobic Fabrics for Oil/Water Separation and Self-cleaning

  • 期刊论文

  • 发表日期：

    2025年4月29日

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  • Meng-Shu Liu,
  • Rungthip Kunthom,
  • Beata Dudziec,
  • Hong-Zhi Liu

摘要

Functional superhydrophobic coatings have attracted considerable attention because of their potential for a wide range of applications. In this study, a novel cyclotetrasiloxane-based hybrid superhydrophobic modifier (F-D4) was prepared for the first time using a mild thiolene click reaction of 2,4,6,8-tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane (Vi-D4) with perfluorohexylethanethiol (PFOT) and mercaptopropyltrimethoxysilane (MPTMS) as the raw materials. Then, F-D4 was introduced into the fabric via a sol-gel process, resulting in a superhydrophobic fabric (F-D4-Fabric). The surface characteristics of the modified fabric were determined using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and water contact angle (WCA). The coated fabrics have outstanding mechanical, physical, and chemical stability, and exhibit excellent self-cleaning and anti-fouling properties. Owing to its superhydrophobicity, F-D4-Fabric could efficiently separate a range of oil/water mixtures with a separation efficiency of up to 99.99%. The study showed that the modification strategy used in the dip-coating process greatly affected the superhydrophobicity of the cotton fabric, which is useful for oil/water separation and self-cleaning applications.