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Preparation and characteristics of a recycled cement-based superhydrophobic coating with dirt pickup resistance

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Abstract

We introduce a low-cost and effective technique that can transform waste cement-based dust into a superhydrophobic coating with dirt pickup resistance. An organic-inorganic hybrid superhydrophobic coating is prepared by the sol-gel method using methyltriethoxysilane as a precursor and waste cement-based dust as a film-forming material. Orthogonal experiments and a comprehensive scoring method were used to optimize the composition and production technologies. Our results show that this superhydrophobic organic-inorganic hybrid coating has an average static contact angle of 151.65° and low water adhesion. Related tests reveal that the dirt pickup resistance, washing resistance and film-substrate cohesion of this coating are also outstanding. The multi-scale physical and chemical mechanisms behind the properties of the coating are investigated. This recycled cement-based coating can be used as the external cover of engineering structures to protect them from corrosion.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China

    LiPing Guo & Wei Sun

  2. Collaborative Innovation Center for Advanced Civil Engineering Materials, Nanjing, 211189, China

    LiPing Guo & Wei Sun

  3. Jiangsu Key Laboratory of Construction Materials, Nanjing, 211189, China

    LiPing Guo & Wei Sun

  4. Wuxi Communication Engineering Co., Ltd., Wuxi, 214026, China

    Tao Yu

  5. Department of Civil, Environmental and Architectural Engineering, The University of Kansas, Lawrence, Kansas, 66045, USA

    MuZai Feng

Authors
  1. LiPing Guo
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  2. Wei Sun
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  3. Tao Yu
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  4. MuZai Feng
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Correspondence to LiPing Guo.

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Guo, L., Sun, W., Yu, T. et al. Preparation and characteristics of a recycled cement-based superhydrophobic coating with dirt pickup resistance. Sci. China Technol. Sci. 58, 1096–1104 (2015). https://doi.org/10.1007/s11431-015-5804-5

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  • DOI: https://doi.org/10.1007/s11431-015-5804-5

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