Duplex coatings of cerium and epoxy modified with polypyrrole and silver nanoparticles formed onto AZ91D Mg alloy

Autores
Loperena, Ana Paula; Lehr, Ivana Leticia; González, María Belén; Brugnoni, Lorena Inés; Saidman, Silvana Beatriz
Año de publicación
2022
Idioma
español castellano
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Due to their biocompatibility, biodegradability and mechanical characteristics similar to those of human bone, Mg alloys are a promising alternative as materials for the fabrication of temporary implants. However, its high rate of degradation in a physiological environment prevents their use in these applications. In order to increase the corrosion resistance of the Mg AZ91D alloy in a simulated physiological environment, double cerium and modified epoxy coatings were generated. As a first step, polypyrrole (PPy) modified with silver nanoparticles was chemically synthesized from pyrrole (Py), Ag-NO3 and Ce(SO4)2. Two sizes of nanoparticles were synthesized by varying the concentration of AgNO3 used for the synthesis of the powders. It was verified that the compounds have bactericidal properties against the Gram negative Escherichia coli (E. coli). From these results, a duplex coating was formed onto the AZ91D Mg alloy and then it was modified with the synthesized powders. The coating consisted of an inner cerium-based film and an epoxy film on top, 1 wt.% of the bactericidal composites was added to the resin before its application. Electrochemical analysis as anodic polarization, Tafel polarization curves, variation of the open circuit potential (OCP) and electrochemical impedance spec-troscopy (EIS) verified that the modified coatings were able to protect the alloy against corrosion in simulated physiological solution. The attained protection degree is attributed to the anticorrosive properties of both films and to the presence of polypyrrole (PPy) in the composite, which contributes to maintain the alloy in the passive state. At the same time, the addition of the composite confers antibacterial properties to the coating, which were evaluated through the Kirby-Bauer technique against bacteria E. coli.
Fil: Loperena, Ana Paula. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Lehr, Ivana Leticia. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: González, María Belén. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Brugnoni, Lorena Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Ciencias Biológicas y Biomédicas del Sur. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Instituto de Ciencias Biológicas y Biomédicas del Sur; Argentina
Fil: Saidman, Silvana Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina
Materia
ANTICORROSIVE AND ANTIBACTERIAL PROPERTIES
AZ91D MG ALLOY
EPOXY
POLYPYRROLE
SILVER NANOPARTICLES
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/198278
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Duplex coatings of cerium and epoxy modified with polypyrrole and silver nanoparticles formed onto AZ91D Mg alloyRecubrimientos dobles de cerio y epoxi modificados con polipirrol y nanopartículas de plata formados sobre la aleación de Mg AZ91DLoperena, Ana PaulaLehr, Ivana LeticiaGonzález, María BelénBrugnoni, Lorena InésSaidman, Silvana BeatrizANTICORROSIVE AND ANTIBACTERIAL PROPERTIESAZ91D MG ALLOYEPOXYPOLYPYRROLESILVER NANOPARTICLEShttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Due to their biocompatibility, biodegradability and mechanical characteristics similar to those of human bone, Mg alloys are a promising alternative as materials for the fabrication of temporary implants. However, its high rate of degradation in a physiological environment prevents their use in these applications. In order to increase the corrosion resistance of the Mg AZ91D alloy in a simulated physiological environment, double cerium and modified epoxy coatings were generated. As a first step, polypyrrole (PPy) modified with silver nanoparticles was chemically synthesized from pyrrole (Py), Ag-NO3 and Ce(SO4)2. Two sizes of nanoparticles were synthesized by varying the concentration of AgNO3 used for the synthesis of the powders. It was verified that the compounds have bactericidal properties against the Gram negative Escherichia coli (E. coli). From these results, a duplex coating was formed onto the AZ91D Mg alloy and then it was modified with the synthesized powders. The coating consisted of an inner cerium-based film and an epoxy film on top, 1 wt.% of the bactericidal composites was added to the resin before its application. Electrochemical analysis as anodic polarization, Tafel polarization curves, variation of the open circuit potential (OCP) and electrochemical impedance spec-troscopy (EIS) verified that the modified coatings were able to protect the alloy against corrosion in simulated physiological solution. The attained protection degree is attributed to the anticorrosive properties of both films and to the presence of polypyrrole (PPy) in the composite, which contributes to maintain the alloy in the passive state. At the same time, the addition of the composite confers antibacterial properties to the coating, which were evaluated through the Kirby-Bauer technique against bacteria E. coli.Fil: Loperena, Ana Paula. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Lehr, Ivana Leticia. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: González, María Belén. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Brugnoni, Lorena Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Ciencias Biológicas y Biomédicas del Sur. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Instituto de Ciencias Biológicas y Biomédicas del Sur; ArgentinaFil: Saidman, Silvana Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; ArgentinaUniversidade Federal do Rio de Janeiro2022-02-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/198278Loperena, Ana Paula; Lehr, Ivana Leticia; González, María Belén; Brugnoni, Lorena Inés; Saidman, Silvana Beatriz; Duplex coatings of cerium and epoxy modified with polypyrrole and silver nanoparticles formed onto AZ91D Mg alloy; Universidade Federal do Rio de Janeiro; Matéria; 27; 2; 8-2-2022; 1 - 111517-7076CONICET DigitalCONICETspainfo:eu-repo/semantics/altIdentifier/doi/10.1590/S1517-707620220002.1370info:eu-repo/semantics/altIdentifier/url/https://www.scielo.br/j/rmat/a/HRqwcdkxB5hQQTgWzJkLJdf/?lang=esinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:17:30Zoai:ri.conicet.gov.ar:11336/198278instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-10 13:17:30.315CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Duplex coatings of cerium and epoxy modified with polypyrrole and silver nanoparticles formed onto AZ91D Mg alloy
Recubrimientos dobles de cerio y epoxi modificados con polipirrol y nanopartículas de plata formados sobre la aleación de Mg AZ91D
title Duplex coatings of cerium and epoxy modified with polypyrrole and silver nanoparticles formed onto AZ91D Mg alloy
spellingShingle Duplex coatings of cerium and epoxy modified with polypyrrole and silver nanoparticles formed onto AZ91D Mg alloy
Loperena, Ana Paula
ANTICORROSIVE AND ANTIBACTERIAL PROPERTIES
AZ91D MG ALLOY
EPOXY
POLYPYRROLE
SILVER NANOPARTICLES
title_short Duplex coatings of cerium and epoxy modified with polypyrrole and silver nanoparticles formed onto AZ91D Mg alloy
title_full Duplex coatings of cerium and epoxy modified with polypyrrole and silver nanoparticles formed onto AZ91D Mg alloy
title_fullStr Duplex coatings of cerium and epoxy modified with polypyrrole and silver nanoparticles formed onto AZ91D Mg alloy
title_full_unstemmed Duplex coatings of cerium and epoxy modified with polypyrrole and silver nanoparticles formed onto AZ91D Mg alloy
title_sort Duplex coatings of cerium and epoxy modified with polypyrrole and silver nanoparticles formed onto AZ91D Mg alloy
dc.creator.none.fl_str_mv Loperena, Ana Paula
Lehr, Ivana Leticia
González, María Belén
Brugnoni, Lorena Inés
Saidman, Silvana Beatriz
author Loperena, Ana Paula
author_facet Loperena, Ana Paula
Lehr, Ivana Leticia
González, María Belén
Brugnoni, Lorena Inés
Saidman, Silvana Beatriz
author_role author
author2 Lehr, Ivana Leticia
González, María Belén
Brugnoni, Lorena Inés
Saidman, Silvana Beatriz
author2_role author
author
author
author
dc.subject.none.fl_str_mv ANTICORROSIVE AND ANTIBACTERIAL PROPERTIES
AZ91D MG ALLOY
EPOXY
POLYPYRROLE
SILVER NANOPARTICLES
topic ANTICORROSIVE AND ANTIBACTERIAL PROPERTIES
AZ91D MG ALLOY
EPOXY
POLYPYRROLE
SILVER NANOPARTICLES
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Due to their biocompatibility, biodegradability and mechanical characteristics similar to those of human bone, Mg alloys are a promising alternative as materials for the fabrication of temporary implants. However, its high rate of degradation in a physiological environment prevents their use in these applications. In order to increase the corrosion resistance of the Mg AZ91D alloy in a simulated physiological environment, double cerium and modified epoxy coatings were generated. As a first step, polypyrrole (PPy) modified with silver nanoparticles was chemically synthesized from pyrrole (Py), Ag-NO3 and Ce(SO4)2. Two sizes of nanoparticles were synthesized by varying the concentration of AgNO3 used for the synthesis of the powders. It was verified that the compounds have bactericidal properties against the Gram negative Escherichia coli (E. coli). From these results, a duplex coating was formed onto the AZ91D Mg alloy and then it was modified with the synthesized powders. The coating consisted of an inner cerium-based film and an epoxy film on top, 1 wt.% of the bactericidal composites was added to the resin before its application. Electrochemical analysis as anodic polarization, Tafel polarization curves, variation of the open circuit potential (OCP) and electrochemical impedance spec-troscopy (EIS) verified that the modified coatings were able to protect the alloy against corrosion in simulated physiological solution. The attained protection degree is attributed to the anticorrosive properties of both films and to the presence of polypyrrole (PPy) in the composite, which contributes to maintain the alloy in the passive state. At the same time, the addition of the composite confers antibacterial properties to the coating, which were evaluated through the Kirby-Bauer technique against bacteria E. coli.
Fil: Loperena, Ana Paula. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Lehr, Ivana Leticia. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: González, María Belén. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Brugnoni, Lorena Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Ciencias Biológicas y Biomédicas del Sur. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia. Instituto de Ciencias Biológicas y Biomédicas del Sur; Argentina
Fil: Saidman, Silvana Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química. Instituto de Ingeniería Electroquímica y Corrosión; Argentina
description Due to their biocompatibility, biodegradability and mechanical characteristics similar to those of human bone, Mg alloys are a promising alternative as materials for the fabrication of temporary implants. However, its high rate of degradation in a physiological environment prevents their use in these applications. In order to increase the corrosion resistance of the Mg AZ91D alloy in a simulated physiological environment, double cerium and modified epoxy coatings were generated. As a first step, polypyrrole (PPy) modified with silver nanoparticles was chemically synthesized from pyrrole (Py), Ag-NO3 and Ce(SO4)2. Two sizes of nanoparticles were synthesized by varying the concentration of AgNO3 used for the synthesis of the powders. It was verified that the compounds have bactericidal properties against the Gram negative Escherichia coli (E. coli). From these results, a duplex coating was formed onto the AZ91D Mg alloy and then it was modified with the synthesized powders. The coating consisted of an inner cerium-based film and an epoxy film on top, 1 wt.% of the bactericidal composites was added to the resin before its application. Electrochemical analysis as anodic polarization, Tafel polarization curves, variation of the open circuit potential (OCP) and electrochemical impedance spec-troscopy (EIS) verified that the modified coatings were able to protect the alloy against corrosion in simulated physiological solution. The attained protection degree is attributed to the anticorrosive properties of both films and to the presence of polypyrrole (PPy) in the composite, which contributes to maintain the alloy in the passive state. At the same time, the addition of the composite confers antibacterial properties to the coating, which were evaluated through the Kirby-Bauer technique against bacteria E. coli.
publishDate 2022
dc.date.none.fl_str_mv 2022-02-08
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/198278
Loperena, Ana Paula; Lehr, Ivana Leticia; González, María Belén; Brugnoni, Lorena Inés; Saidman, Silvana Beatriz; Duplex coatings of cerium and epoxy modified with polypyrrole and silver nanoparticles formed onto AZ91D Mg alloy; Universidade Federal do Rio de Janeiro; Matéria; 27; 2; 8-2-2022; 1 - 11
1517-7076
CONICET Digital
CONICET
url http://hdl.handle.net/11336/198278
identifier_str_mv Loperena, Ana Paula; Lehr, Ivana Leticia; González, María Belén; Brugnoni, Lorena Inés; Saidman, Silvana Beatriz; Duplex coatings of cerium and epoxy modified with polypyrrole and silver nanoparticles formed onto AZ91D Mg alloy; Universidade Federal do Rio de Janeiro; Matéria; 27; 2; 8-2-2022; 1 - 11
1517-7076
CONICET Digital
CONICET
dc.language.none.fl_str_mv spa
language spa
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1590/S1517-707620220002.1370
info:eu-repo/semantics/altIdentifier/url/https://www.scielo.br/j/rmat/a/HRqwcdkxB5hQQTgWzJkLJdf/?lang=es
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Universidade Federal do Rio de Janeiro
publisher.none.fl_str_mv Universidade Federal do Rio de Janeiro
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.004268

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