Preparation and characterization of antibacterial silver/vermiculites and silver/montmorillonites

Valášková, Marta; Hundáková, Marianna; Kutláková, Kateřina Mamulová; Seidlerová, Jana; Čapková, Pavla; Pazdziora, Erich; Matějová, Kateřina; Heřmánek, Martin; Klemm, Volker; Rafaja, David

doi:10.1016/j.gca.2010.08.025

Cited by 37 publications

(19 citation statements)

References 66 publications

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“…A decrease in gallery spacing from 11.72 Å to 10.44 Å was observed following the silver modification. This is consistent with previous preparations of silvercontaining montmorillonite reported by Magaña et al [11] and Valásková et al [15]. showing the relative concentrations of all elements detected is presented in Table 2.…”

Section: Resultssupporting

confidence: 92%

“…Nanoclays have been widely studied as carriers for silver as a route to preparing antimicrobial agents [8][9][10][11][12][13][14][15]; these silver-modified nanoclays have demonstrated good antimicrobial performance against a wide range of bacteria in contact times under 12 hours. Of particular relevance to the present study, Keller-Besrest et al conducted a structural investigation of silver-added montmorillonite clay for possible use in the treatment of burns using EXAFS spectroscopy [8].…”

Section: Introductionmentioning

confidence: 99%

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Formulation of epoxy–polyester powder coatings containing silver-modified nanoclays and evaluation of their antimicrobial properties

et al. 2012

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Current interest in antimicrobial coatings is driven by an urgent need for more effective strategies to control microbial infection. In this study, antimicrobial nanoclays were prepared by ion-exchange of sodium montmorillonite (MMT) with silver ions which have been previously reported to exhibit biocidal activity. The extent of ion exchange achieved was estimated by x-ray photoelectron spectroscopy (XPS). The silver-modified nanoclay (AgMMT) fully inhibited growth of Gram negative Escherichia coli DH5α (E. coli) over 24 hours;annealing AgMMT under typical conditions used to prepare polymer composites did not reduce its antimicrobial efficacy. However, powder coatings of AgMMT dispersed in epoxy/polyester resin exhibited no antimicrobial effect E. coli. This is believed to be caused by poor wetting of the polymer coating, which restricted the diffusion of silver ion from the coating.

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Formulation of epoxy–polyester powder coatings containing silver-modified nanoclays and evaluation of their antimicrobial properties

et al. 2012

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“…Based on the results of the microstructure analysis of silver nanoparticles and clay mineral substrates authors [36,70] assumed the manner of growth of nanoparticles on the surface of vermiculite and montmorillonite.…”

Section: Vermiculite Particles As Carrier Of Silver Nanoparticlesmentioning

confidence: 99%

Vermiculite: Structural Properties and Examples of the Use

Valášková¹,

Martynková²

2012

Clay Minerals in Nature - Their Characterization, Modification and Application

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“…For example, silver nanoparticles on montmorillonite substrates were prepared using a silver nitrate solution in water (Magaña et al, 2008;Valášková et al, 2007Valášková et al, , 2010). Other authors have described procedures, including an additional step of silver nanoparticles' preparation PHILIPS XL-30 equipped with energy dispersive spectrometer (EDS) for elemental analysis and mapping.…”

Section: Introductionmentioning

confidence: 99%

“…Cu-montmorillonites were studied in connection with their potential utilization in veterinary medicine Hu and Xia, 2006;Tong et al, 2005;Yu et al, 2008). The antibacterial influence of Ag/montmorillonites and Ag/vermiculites was less commonly studied (Magaña et al, 2008;Valášková et al, 2010;Özdemir et al, 2010;Malachová et al, 2009). Özdemir et al (2010) compared the antibacterial effect of Ag-, Cu-and Zn-forms of montmorillonite.…”

mentioning

confidence: 99%

Silver and-or copper vermiculites and their antibacterial effect

Hundáková¹

2013

Acta Geodynamica Et Geomaterialia

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Vermiculite (V) from Brazil with aqueous solutions AgNO 3 and/or Cu(NO 3 ) 2 was used for preparation of nanocomposites V/Ag, V/Cu, V/AgCu and V/CuAg using two procedures and their effect on bacteria was compared. Structural changes were evaluated using X-ray diffraction (XRD) analysis, Infrared spectroscopy (IRS) and Scanning electron microscopy (SEM). Elemental chemical composition was determined using X-ray fluorescence (XRF) analysis and the solutions were analyzed by Atomic emission spectroscopy with inductively coupled plasma (AES-ICP). Antibacterial properties of Ag-and Cu-vermiculites and combined Ag/Cu-vermiculites were tested on two bacteria groups: (1) Gram-positive, G + , (Staphylococcus aureus and Enterococcus faecalis) and (2) Gram-negative, G -

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Preparation and characterization of antibacterial silver/vermiculites and silver/montmorillonites

Cited by 37 publications

References 66 publications

Formulation of epoxy–polyester powder coatings containing silver-modified nanoclays and evaluation of their antimicrobial properties

Formulation of epoxy–polyester powder coatings containing silver-modified nanoclays and evaluation of their antimicrobial properties

Vermiculite: Structural Properties and Examples of the Use

Silver and-or copper vermiculites and their antibacterial effect

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