Abstract
In order to prepare hydrophobic waterborne polyurethane coatings with better performances, the silicon-containing waterborne polyurethane (SiWPU) with functional chain extender hydroxyethyl acrylate (HEA) was prepared first, and then a series of silicon&fluorine-containing polyurethane/acrylate (FSiPUA) emulsions were obtained with flourine containing acrylic monomer by seed emulsion polymerization, introducing micro-nano SiO2 into FSiPUA emulsion to make the final hybrid emulsion. The properties of SiWPU, FSiPUA and SiO2/FSiPUA were investigated by fourier transform infrared spectra (FTIR), transmission electron microscope (TEM), Scanning Electron Microscope (SEM) and some other analytical methods. The results revealed that FSiPUA emulsion particles possessed composite core-shell structure and FSiPUA films with suitable ratio performed better than SiWPU films in hardness, water resistance and solvent resistance. The SiO2/FSiPUA films with micro-nano dual roughness structure showed a water contact angle of 136° with good resistance to acid and alkali.
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Funded by the National High Technology Research and Development Program ("863"Program) (No.2003AA305071)
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Cai, Q., Huang, J., Weng, R. et al. Preparation and surface properties of silicon-containing waterborne polyurethane functionalized with fluorine-containing acrylate and micro-nano silica. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 33, 233–241 (2018). https://doi.org/10.1007/s11595-018-1811-2
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DOI: https://doi.org/10.1007/s11595-018-1811-2