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Dynamic hydrophobic behavior of water droplets impact on the cotton fabrics coated with POSS block copolymer

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Abstract

In this paper, fluorinated polyhedral oligomeric silsesquioxanes block copolymer with trifluoroethyl methacrylate as arms was synthesized through atom transfer radical polymerization, and blended with poly(vinylidene fluoride) for the preparation of an organic–inorganic hybrid water-repellent material. The organic–inorganic hybrid material was coated on cotton fabric for the hydrophobicity. The surface morphologies, surface chemical composition and contact angles of the coated cotton surface were measured. Furthermore, the dynamic hydrophobic behavior of water droplet impact on the cotton fabric was investigated. The bounce tendency after the water droplets hitting the coated fabric was obvious, and the morphology variation, spreading diameter, bouncing height and energy conversion of the water droplets were examined. In addition, a model of sticking and splashing of water droplet on the cotton surface was proposed. The coated hydrophobic fabrics displayed good water-repellent and durability, and maintained hydrophobicity even after treatment with acid and alkaline compounds, scraping with a knife, rubbing, and tape adhesion.

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Acknowledgments

This work is supported by the Natural Science Foundation of Jiangsu Province (Grant No. BK20180588), the national first-class discipline program of Light Industry Technology and Engineering (LITE2018-21), and the Fundamental Research Funds for the Central Universities (Grant No. JUSRP11702).

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Correspondence to Zhiguang Li or Xuehong Ren.

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Kong, Q., Zhang, Z., Li, Z. et al. Dynamic hydrophobic behavior of water droplets impact on the cotton fabrics coated with POSS block copolymer. Cellulose 27, 1705–1716 (2020). https://doi.org/10.1007/s10570-019-02870-7

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  • DOI: https://doi.org/10.1007/s10570-019-02870-7

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