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Superhydrophobic, Superoleophobic and Antimicrobial Coatings for the Protection of Silk Textiles

Department of Management and Conservation of Ecclesiastical Cultural Heritage Objects, University Ecclesiastical Academy of Thessaloniki, 54250 Thessaloniki, Greece
Author to whom correspondence should be addressed.
Coatings 2018, 8(3), 101;
Received: 7 February 2018 / Revised: 28 February 2018 / Accepted: 7 March 2018 / Published: 9 March 2018
(This article belongs to the Special Issue Superhydrophobic Coatings)
PDF [2133 KB, uploaded 12 March 2018]


A method to produce multifunctional coatings for the protection of silk is developed. Aqueous dispersion, free of any organic solvent, containing alkoxy silanes, organic fluoropolymer, silane quaternary ammonium salt, and silica nanoparticles (7 nm in mean diameter) is sprayed onto silk which obtains (i) superhydrophobic and superoleophobic properties, as evidenced by the high contact angles (>150°) of water and oil drops and (ii) antimicrobial properties. Potato dextrose agar is used as culture medium for the growth of microorganisms. The protective coating hinders the microbial growth on coated silk which remains almost free of contamination after extensive exposure to the microorganisms. Furthermore, the multifunctional coating induces a moderate reduction in vapor permeability of the treated silk, it shows very good durability against abrasion and has a minor visual effect on the aesthetic appearance of silk. The distinctive roles of the silica nanoparticles and the antimicrobial agent on the aforementioned properties of the coating are investigated. Silica nanoparticles induce surface structures at the micro/nano-meter scale and are therefore responsible for the achieved extreme wetting properties that promote the antimicrobial activity. The latter is further enhanced by adding the silane quaternary ammonium salt in the composition of the protective coating. View Full-Text
Keywords: superhydrophobic; superoleophobic; antimicrobial; siloxane; nanoparticle; silk; textile; abrasion; color superhydrophobic; superoleophobic; antimicrobial; siloxane; nanoparticle; silk; textile; abrasion; color

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Aslanidou, D.; Karapanagiotis, I. Superhydrophobic, Superoleophobic and Antimicrobial Coatings for the Protection of Silk Textiles. Coatings 2018, 8, 101.

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