Coating of leather with dye-containing antibacterial and conducting polypyrrole

0570050 - ÚMCH 2024 RIV CH eng J - Journal Article
Ngwabebhoh, F. A. - Zandraa, O. - Sáha, T. - Stejskal, J. - Kopecký, D. - Trchová, M. - Pfleger, Jiří
Coating of leather with dye-containing antibacterial and conducting polypyrrole.
Coatings. Roč. 13, č. 3 (2023), č. článku 608. E-ISSN 2079-6412
Institutional support: RVO:61389013
Keywords : polypyrrole * poly(N-vinylpyrrolidone) * conducting leather
OECD category: Polymer science
Impact factor: 3.4, year: 2022
Method of publishing: Open access
https://www.mdpi.com/2079-6412/13/3/608

In the search for functional organic biomaterials, leather constituted by collagen fibers was coated with a conducting polymer, polypyrrole. The coating was carried out during the oxidation of pyrrole in an aqueous solution of poly(N-vinylpyrrolidone) in the presence of five organic dyes: crystal violet, neutral red, methyl orange, acriflavine, and methylene blue. This technique ensures the uniform coating of collagen fibers with polypyrrole and incorporation of organic dyes. The surface morphology was observed with scanning electron microscopy and the transverse profile, reflecting the penetration of the conducting phase into the leather body with optical microscopy. While the polypyrrole coating endows leather with electrical conductivity, organic dyes are expected to affect the polymer morphology and to provide an antibacterial effect. The lowest sheet resistance and antibacterial activity were obtained with crystal violet. This type of coating was characterized in more detail. Infrared spectroscopy confirmed the coating of collagen fibers with polypyrrole and dye incorporation. Mechanical properties were extended to the cyclic bending of the leather at various angles over 5000 cycles. The relative resistance changes were a few percent, indicating good electrical stability during repeated mechanical stress.

Permanent Link: https://hdl.handle.net/11104/0342250