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. 2023 Aug 21;28(16):6173.
doi: 10.3390/molecules28166173.

Effect of the Addition of Graphene Flakes on the Physical and Biological Properties of Composite Paints

Natalia Bartczak  1   2 , Jerzy Kowalczyk  1 , Robert Tomala  1 , Mariusz Stefanski  1 , Damian Szymański  1 , Maciej Ptak  1 , Wiesław Stręk  1 , Konrad Szustakiewicz  2 , Tomasz Kurzynowski  3 , Łukasz Szczepański  3 , Adam Junka  4 , Damian Gorczyca  5 , Paweł Głuchowski  1
Affiliations

Effect of the Addition of Graphene Flakes on the Physical and Biological Properties of Composite Paints

Natalia Bartczak et al. Molecules. .

Abstract

In this study, graphene flakes were obtained using an electrolytic method and characterized using X-ray diffraction (XRD), Raman and FTIR spectroscopy, scanning and transmission electron microscopy (SEM/TEM). Graphene-based composites with varying concentrations of 0.5%, 1% and 3% by weight were prepared with acrylic paint, enamel and varnish matrices. The mechanical properties were evaluated using micro-hardness testing, while wettability and antimicrobial activity against three pathogens (Staphylococcus aureus 33591, Pseudomonas aeruginosa 15442, Candida albicans 10231) were also examined. The results indicate that the addition of graphene flakes significantly enhances both the mechanical and antimicrobial properties of the coatings.

Keywords: acrylic paint; antimicrobial properties; composite paints; enamel; graphene flakes; micro-hardness; varnish; wettability.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
XRD pattern (a), Raman spectrum (b) and FTIR spectrum (c) of the graphene flakes.
Figure 2
Figure 2
SEM (top) and TEM (bottom) images of graphene flakes used for composites’ preparation.
Figure 3
Figure 3
SEM images of the surface of enamel paint and composites (a) and magnification of the graphene flakes’ aggregates with visible “blades” (b).
Figure 4
Figure 4
The micro-indentations on a ED05 composite surface: immediately after measurement (a) and 10 s later (b).
Figure 5
Figure 5
Water contact angle pictures of reference surface (XX0) and composite paint with 0.5 weight% graphene (XX05). ED—enamel, LV—varnish, FA—acrylic paint.
Figure 6
Figure 6
Survival rates for three pathogens on the different paint composites prepared with various concentrations of graphene flakes.
See this image and copyright information in PMC

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