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Facile fabrication of superhydrophobic coatings based on two silica sols

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Abstract

Superhydrophobic coatings were successfully fabricated by using two silica sols and fluorinated acrylate copolymers through the organic-inorganic hybrid method. The two silica sols contained different nanoparticles, namely, silica nanoparticles with many hydroxyl groups on their surfaces and silica nanoparticles with many long-chain alkyls on their surfaces. The integration of these two silica sols and fluorinated acrylate copolymers satisfied two necessary conditions of multi-scale nano/microstructures and low surface energy for fabricating superhydrophobic coatings. The superhydrophobic surfaces were constructed by using appropriate weight ratios of silica/copolymers and silica sol (methanol) contents. The superhydrophobic coatings displayed a water contact angle as high as 156.2° and contact angle hysteresis of 2.4°, which indicated their good self-cleaning capability. In particular, these coatings showed good mechanical properties and excellent thermal stabilities. The method is not only a facile and inexpensive way to achieve the lotus effect but could also create coatings with high values in practical application.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant Nos. 51572201).

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Authors and Affiliations

  1. Hubei Key Laboratory of Coal Conversion and New Carbon Material, College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan, 430081, China

    Yanfen Huang & Zaosheng Lv

  2. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China

    Shengping Yi & Chi Huang

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  1. Yanfen Huang
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  2. Shengping Yi
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  4. Chi Huang
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Correspondence to Chi Huang.

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Yanfen Huang and Shengping Yi contributed equally to this work.

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Huang, Y., Yi, S., Lv, Z. et al. Facile fabrication of superhydrophobic coatings based on two silica sols. Colloid Polym Sci 294, 1503–1509 (2016). https://doi.org/10.1007/s00396-016-3912-9

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  • DOI: https://doi.org/10.1007/s00396-016-3912-9

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