UV powder coatings containing synthetic Ag-beidellite for antibacterial properties

Croutxé‐Barghorn, Céline; Allonas, Xavier; Brendlé, Jocelyne; Bessières, J.; Merlin, André; Masson, Éric

doi:10.1016/j.clay.2014.03.013

Cited by 10 publications

(9 citation statements)

References 31 publications

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“…Consequently, the Laponite can be considered as inactive because the results suggest a slight increase in the number of bacteria (multiplication) in the presence of this clay. 43,44 These results are similar to Ghadiri et al, 45 who studied the antimicrobial efficiency and cytotoxicity of Laponite clay. In their study, the Laponite did not show any antimicrobial property to the E. coli, Pseudomonas aeruginosa, and S. aureus bacteria, as well as no cytotoxic effect on fibroblast cells.…”

Section: Resultssupporting

confidence: 85%

Photochemical Deposition of Silver Nanoparticles on Clays and Exploring Their Antibacterial Activity

Lombardo

Poli

Castro

et al. 2016

ACS Appl. Mater. Interfaces

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Photochemical method was used to synthesize silver nanoparticles (AgNPs) in the presence of citrate or clay (SWy-1, SYn-1, and Laponite B) as stabilizers and Lucirin TPO as photoinitiator. During the photochemical synthesis, an appearance of the plasmon absorption band was seen around 400 nm, indicating the formation of AgNPs. X-ray diffraction results suggested that AgNPs prepared in SWy-1 were adsorbed into interlamellar space, and moreover, showed some clay exfoliation. In the case of SYn-1, AgNPs was not intercalated. For the AgNP/Lap B sample, the formation of an exfoliated structure occurred. Transmission electron microscopy revealed the spherical shape of AgNPs for all samples. The particle sizes obtained for AgNP/SWy-1, AgNP/SYn-1, and AgNP/Lap B were 2.6, 5.1, and 3.8 nm, respectively. AgNPs adsorbed on SYn-1 reveal nonuniform size and aggregation of some particles. However, AgNP/SWy-1 and AgNP/Lap B samples are more uniform and have diameters smaller than those prepared with SYn-1. This behavior is due to the ability to exfoliate these clays. The antibacterial activities of pure clays, AgNP/citrate, and AgNP/clays were investigated against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). AgNPs in the presence of clays (AgNPs/SYn-1 and AgNPs/SWy-1) showed a lower survival index percentage compared to those obtained for pure clays and AgNPs. The AgNP/SWy-1 sample showed good antibacterial activity against both tested species and the lowest survival index of 3.9 and 4.3 against E. coli and S. aureus, respectively. AgNPs are located in the interlayer region of the SWy-1, which has acid sites. These acidic sites may contribute to the release of Ag(+) ions from the surface of AgNPs. On the other hand, Laponite B and AgNP/Lap B samples did not demonstrate any bactericidal activity.

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Section: Resultssupporting

confidence: 85%

Photochemical Deposition of Silver Nanoparticles on Clays and Exploring Their Antibacterial Activity

Lombardo

Poli

Castro

et al. 2016

ACS Appl. Mater. Interfaces

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“…While they are related to DBC, the surface and bulk mechanical properties of the cured formulation are difficult to quantify by the above-mentioned spectroscopic methods. For this reason, and particularly for industrial applications, certain physical methods tend to be more relevant: pendulum hardness, scratch resistance, rheology, shrinkage measurement, and resistance to stains and solvents . Pendulum hardness, based on the method of König, is in fact very commonly used in industry, as it is robust and simple and commercial devices are relatively inexpensive.…”

Section: Introductionmentioning

confidence: 99%

Strategies to Reduce Oxygen Inhibition in Photoinduced Polymerization

et al. 2013

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“…As we can see, a relatively smooth surface morphology of QOMA coatings was obtained, without any cracks or discontinuities (Figure 3(a)). It is reasonable to deduce that QOMA can be directly incorporated into powder coating formulations and that homogeneous coatings are obtained [39]. Note that in the high-resolution SEM micrographs (Figure 3 (b,c)) QOMA were evident on the coating surface.…”

Section: Microstructure Of Qoma Coatingsmentioning

confidence: 99%

Green antimicrobial coating based on quaternised chitosan/organic montmorillonite/Ag NPs nanocomposites

Chen

Cai³

et al. 2016

Journal of Experimental Nanoscience

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This work is aimed at developing a green antimicrobial coating. First, a green antimicrobial agent, quaternised chitosan (QCS)/organic montmorillonite (OMMT)/silver nanoparticles (Ag NPs) (QOMA) nanocomposite was fabricated through an environmental-friendly one-step approach. Morphological and structural characteristics of QOMA were investigated, and good antimicrobial activity was proved. QOMA was then incorporated into powder coating formulations to form a homogeneous coating on steel plates, which was studied by scanning electron images. Besides, the physical and mechanical properties as well as the antimicrobial performances of the coatings were discussed. The results showed that the addition of QOMA imparted good antimicrobial capacity to the powder coating, but did not affect its physical and mechanical properties. The coatings were able to effectively inactivate Gram-negative bacteria (Escherichia coli), Gram-positive bacteria (Staphylococcus aureus) and fungi (Aspergillus niger, Penicillium funiculosum, Chaetomium globasum, Paecilomyces varioti, Asp. terreus and Aureobasidium pullulans). Our findings demonstrate the possibilities of green antimicrobial coating containing QOMA for practical applications in medical devices, domestic appliances and other solid surfaces concerning bacterial infection and contamination.

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UV powder coatings containing synthetic Ag-beidellite for antibacterial properties

Cited by 10 publications

References 31 publications

Photochemical Deposition of Silver Nanoparticles on Clays and Exploring Their Antibacterial Activity

Photochemical Deposition of Silver Nanoparticles on Clays and Exploring Their Antibacterial Activity

Strategies to Reduce Oxygen Inhibition in Photoinduced Polymerization

Green antimicrobial coating based on quaternised chitosan/organic montmorillonite/Ag NPs nanocomposites

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