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| Abstract No.: |
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Scheduled at:
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Friday, May 06, 2022, Hall D 1:40 PM
Suspension Spraying II
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| Title: |
Copper-graphene nanoflakes composite coating deposited by suspension plasma spray for antibacterial applications
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| Authors: |
Taki Aissou* / Sherbrooke University, Canada
Jocelyn Veilleux / , Canada
Nadi Braidy/ , Canada
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| Abstract: |
The recent COVID-19 pandemic has highlighted the need for antiviral and antibacterial coatings as a basic option, along with disinfectants, to protect people from contamination. The surfaces we touch in our daily routine can potentially carry the pathogens and thus contribute to the rapid spread of disease from one person to another. Copper (Cu) is one of the materials known for both its antiviral and antibacterial ability and its use dates back hundreds of years. Recently, studies have shown that the combination of graphene with copper coating improves its efficiency and antibacterial behavior. However, the use of copper-graphene composite remains limited because of the cost of copper and its shortage to cover large areas in public places. In addition, its mixture with graphene proves to be difficult and there is no approach to coat surfaces on a large scale and to guarantee homogeneous distribution of graphene within copper grains.
In this work, we have used a versatile inductively-coupled plasma technology process in which a suspension of copper nanopowder and graphene nanoflakes (GNFs) is uniformly deposited on metal substrates. This technique guarantees a good dispersion of the GNFs in the copper matrix and allows to have a nanometric/micrometric thickness of the coating, thus reducing the material consumption. The Cu-GNFs coating and the quality of the graphene flakes were characterized using scanning electron microscopy, Raman spectroscopy and X-ray diffraction. The antibacterial performance of the coating with Escherichia coli was studied and the results show that Cu-GNFs coating has a better antibacterial rate than copper (Cu) coating and exhibits a 99% reduction of Escherichia coli within 1h.
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