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Synthesis of superhydrophobic fluoro-containing silica sol coatings for cotton textile by one-step sol–gel process

  • Original Paper: Sol-gel and hybrid materials with surface modification for applications
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Abstract

Superhydrophobic coatings were successfully fabricated on cotton textiles through a simple one-step sol–gel process. A fluorinated copolymer (PHFA-MPS), as a precursor in the sol–gel reaction, was prepared by copolymerization of hexafluorobutyl methacrylate (HFA) and 3-methacryloxypropyltrimethoxysilane (MPS) as monomers. Then, the fluoro-containing silica sols were formed by alkaline hydrolysis of tetraethylorthosilicate (TEOS) and PHFA-MPS solution in an ethanol solution, which was used to impart the cotton textiles with excellent superhydrophobicity via a facile dip-coating method. The effects of ammonium hydroxide solution (NH4OH) and PHFA-MPS concentration on the structure of the fluoro-containing silica sols, as well as the wetting behavior, surface morphology, and surface composition of the as-prepared cotton textiles were characterized. The results show that the resultant cotton textiles exhibited excellent superhydrophobicity with a WCA of 153.4° and satisfied stability, which offers a simple procedure to generate the superhydrophobicity on cotton textiles for use in a wide range of fields.

A series of fluoro-containing silica sols were prepared through ammonium hydroxide catalyzed sol–gel reaction with tetraethylorthosilicate and a fluorinated copolymer as precursors. The fluoro-containing silica nanocomposites imparted excellent superhydrophobicity to the cotton textile.

Highlights

  • Fluorinated copolymer solution was directly utilized as a sol–gel co-precursor.

  • The fluoro-containing silica sols were prepared via a one-step sol–gel reaction.

  • The fluoro-containing silica sols were helpful to achieve the low surface energy and nanostructure.

  • The fluoro-containing silica sols imparted superhydrophobicity to the textiles.

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Acknowledgements

This study is supported by the Key Laboratory of Cellulose and Lignocellulosics, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, and Provincial Science and technology project of Guangdong Province (No. 2015B090925019).

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Authors and Affiliations

  1. Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, China

    Chi Jiang, Weiqu Liu, Maiping Yang, Sha He, Yankun Xie & Zhengfang Wang

  2. Key Laboratory of Cellulose and Lignocellulosics Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, China

    Chi Jiang, Weiqu Liu, Maiping Yang, Sha He, Yankun Xie & Zhengfang Wang

  3. University of Chinese Academy of Sciences, Beijing, 100049, China

    Chi Jiang, Maiping Yang, Sha He & Yankun Xie

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  1. Chi Jiang
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  2. Weiqu Liu
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  4. Sha He
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  5. Yankun Xie
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Correspondence to Weiqu Liu.

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Jiang, C., Liu, W., Yang, M. et al. Synthesis of superhydrophobic fluoro-containing silica sol coatings for cotton textile by one-step sol–gel process. J Sol-Gel Sci Technol 87, 455–463 (2018). https://doi.org/10.1007/s10971-018-4750-7

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  • DOI: https://doi.org/10.1007/s10971-018-4750-7

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