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Nanoparticle self-migration to obtain wear-resistant UV-curing antibacterial coatings

Researchers from China revealed the fabrication of a robust and wear-resistant polyurethane-based coatings via the addition of fluoro-containing quaternary ammonium compounds (QACF) modified silica nanoparticles. A classical Stöber process was used to obtain nanoparticles with a thin layer of thiol groups on the particle surface. Then, through double bond and thiol group reaction, QACF is then further linked to the particle surface.

It was shown that QACF and its modified silica nanoparticles both show high levels of antibacterial properties toward Gram positive and Gram negative bacteria. Moreover, an antibacterial coating with excellent anti-wear resistance due to the self-migration of the modified silica nanoparticles to the surface layer of the coating was obtained by addition of nanoparticles as less as 10 wt% in the formulation recipe. It was concluded that compared to coatings with added pure antibacterial reagents, coating developed in this research shows enhanced anti-wear property at relatively low particle additions.

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Materials provided by Progress in Organic Coatings 

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Journal Reference:

  1. Guanqing Sun, Huiwen Ge, Jing Luo, Ren Liu, Highly wear-resistant UV-curing antibacterial coatings via nanoparticle self-migration to the top surface, Progress in Organic Coatings, Volume 135, 2019, Pages 19-26, ISSN 0300-9440,
    https://doi.org/10.1016/j.porgcoat.2019.05.018
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