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dc.contributor.author
Fernández Solarte, Alejandra María
dc.contributor.author
Blanco Massani, Mariana Raquel
dc.contributor.author
Molina, Vanesa Magali
dc.contributor.author
Benítez Guerrero, Mónica
dc.contributor.author
Torres Sánchez, Rosa M.
dc.date.available
2020-04-17T18:15:28Z
dc.date.issued
2018-05
dc.identifier.citation
Fernández Solarte, Alejandra María; Blanco Massani, Mariana Raquel; Molina, Vanesa Magali; Benítez Guerrero, Mónica; Torres Sánchez, Rosa M.; Correlating Antimicrobial activity and Structure in Montmorillonite modified with Hexadecyltrimethylammonium and Silver; Sphinxsai; International Journal of ChemTech Research; 11; 6; 5-2018; 209-233
dc.identifier.issn
0974-4290
dc.identifier.uri
http://hdl.handle.net/11336/102942
dc.description.abstract
The relationship between antimicrobial properties and structure of montmorillonite (MMT) containing hexadecyltrimethylammonium bromide (HDTMA-Br) and silver (Ag) was determined. HDTMA was adsorbed at the clay interlayer by a cation exchange, through the positive head of the ammonium group. At higher surfactant loadings (100 and 200% cation exchange capacity (CEC); MH1 and MH2 samples, respectively) the prevalence of weak adsorption (Van der Waals forces) was observed; whereas below the clay CEC (50%, MH0.5) strong interactions predominated (cation exchange). These different interactions impacted on antimicrobial activity, increasing bactericidal capacity when the surfactant was more available to diffuse. For organo-montmorillonites (OMMT) and all samples with Ag, zeta potential pointed out electrical charge changes on the outer surface, respect to MMT. XPS analyses showed peaks attributed to clusters formation, silver oxidation, and Ag0 in MMTAg and MH0.5-Ag. The Ag0 peak was also present in MH1-Ag and MH2-Ag, the later showing an extra peak associated with AgBr. HDMTA+ and Ag adsorbed on the MMT acted synergistically against Staphylococcus aureus. This effect was less noticeable for Escherichia coli and the result was attributed to both, E. coli outer envelope which might lower the efficacy of HDMTA+ adsorbed on the MMT, and decreasing silver proportions when the surfactant loading increased. MH1-Ag presented the best bactericidal properties, showing synergistic effects against S. aureus, while maintaining activity against E. coli compared to MMT-Ag. Understanding MMT-HDMTA-Ag efficacy contributes to the design of new antimicrobial materials for potential applications in health care
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Sphinxsai
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
SYNERGISTIC BACTERICIDAL ACTIVITY
dc.subject
STAPHYLOCOCCUS AUREUS
dc.subject
ESCHERICHIA COLI
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MODIFIED MONTMORILLONITE
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Ingeniería de los Materiales
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Ingeniería de los Materiales
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INGENIERÍAS Y TECNOLOGÍAS
dc.title
Correlating Antimicrobial activity and Structure in Montmorillonite modified with Hexadecyltrimethylammonium and Silver
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-10-18T18:50:14Z
dc.identifier.eissn
2455-9555
dc.journal.volume
11
dc.journal.number
6
dc.journal.pagination
209-233
dc.journal.pais
India
dc.journal.ciudad
New Delhi
dc.description.fil
Fil: Fernández Solarte, Alejandra María. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Tecnología de Recursos Minerales y Cerámica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Tecnología de Recursos Minerales y Cerámica; Argentina. Corporacion Universitaria Minuto de Dios.; Colombia
dc.description.fil
Fil: Blanco Massani, Mariana Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Industrial; Argentina
dc.description.fil
Fil: Molina, Vanesa Magali. Instituto Nacional de Tecnología Industrial; Argentina
dc.description.fil
Fil: Benítez Guerrero, Mónica. Universidad de Malaga. Facultad de Ciencias; España
dc.description.fil
Fil: Torres Sánchez, Rosa M.. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Tecnología de Recursos Minerales y Cerámica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Tecnología de Recursos Minerales y Cerámica; Argentina
dc.journal.title
International Journal of ChemTech Research
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.20902/IJCTR.2018.110627
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://sphinxsai.com/2018/ch_vol11_no6/ch02.htm
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