Nanostructured Poly(methyl Methacrylate)-Silica Coatings for Corrosion Protection of Reinforcing Steel
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1021/acsanm.1c04281 http://hdl.handle.net/11449/234147 |
Resumo: | In the absence of preventive maintenance, corrosion of structural steel by the deterioration of the passive layer due to exposure to aggressive environments is the main failure factor of reinforced concrete. To overcome economic, safety, and environmental implications, present research efforts focus on eco-friendly organic-inorganic hybrid coatings to achieve effective protection of reinforcing steel. Nanostructured PMMA (poly(methyl methacrylate))-silica coatings developed by combining reactions of the polymerization of methyl methacrylate and 3-[(methacryloxy)propyl]trimethoxysilane with the sol-gel hydrolytic condensation of tetraethyl orthosilicate using isopropanol as a solvent represent a promising approach to accomplish this goal. The nanoscale dispersion of silica nodes covalently conjugated with PMMA chains led to transparent, homogeneous, and pore-free coatings deposited with a thickness of 15 μm on 2D and 3D reinforcing steel. Mechanical, thermal, and surface analyses showed a strong adhesion of the coating to the substrate surface (15.9 MPa), a thermal stability of up to 256 °C, and a contact angle of about 75°. Electrochemical assays in standard 3.5 wt % NaCl solution, simulated carbonated, and alkaline concrete pore solutions confirmed effective corrosion protection, with an impedance modulus of up to 100 Gω cm2(at 4 mHz) and a lifetime of more than 670 days. Hence, PMMA-silica hybrid coatings are an eco-friendly and efficient alternative to protect reinforcing steel against corrosion, helping to prevent structural failures and fatal accidents. |
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Nanostructured Poly(methyl Methacrylate)-Silica Coatings for Corrosion Protection of Reinforcing Steelcorrosion protectionorganic-inorganic coatingPMMA-silica hybridreinforcing steelsol-gelIn the absence of preventive maintenance, corrosion of structural steel by the deterioration of the passive layer due to exposure to aggressive environments is the main failure factor of reinforced concrete. To overcome economic, safety, and environmental implications, present research efforts focus on eco-friendly organic-inorganic hybrid coatings to achieve effective protection of reinforcing steel. Nanostructured PMMA (poly(methyl methacrylate))-silica coatings developed by combining reactions of the polymerization of methyl methacrylate and 3-[(methacryloxy)propyl]trimethoxysilane with the sol-gel hydrolytic condensation of tetraethyl orthosilicate using isopropanol as a solvent represent a promising approach to accomplish this goal. The nanoscale dispersion of silica nodes covalently conjugated with PMMA chains led to transparent, homogeneous, and pore-free coatings deposited with a thickness of 15 μm on 2D and 3D reinforcing steel. Mechanical, thermal, and surface analyses showed a strong adhesion of the coating to the substrate surface (15.9 MPa), a thermal stability of up to 256 °C, and a contact angle of about 75°. Electrochemical assays in standard 3.5 wt % NaCl solution, simulated carbonated, and alkaline concrete pore solutions confirmed effective corrosion protection, with an impedance modulus of up to 100 Gω cm2(at 4 mHz) and a lifetime of more than 670 days. Hence, PMMA-silica hybrid coatings are an eco-friendly and efficient alternative to protect reinforcing steel against corrosion, helping to prevent structural failures and fatal accidents.São Paulo State University (UNESP) Institute of ChemistrySão Paulo State University (UNESP) Institute of ChemistryUniversidade Estadual Paulista (UNESP)Uvida, Mayara Carla [UNESP]Trentin, Andressa [UNESP]Harb, Samarah Vargas [UNESP]Pulcinelli, Sandra Helena [UNESP]Santilli, Celso Valentim [UNESP]Hammer, Peter [UNESP]2022-05-01T13:41:37Z2022-05-01T13:41:37Z2022-02-25info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article2603-2615http://dx.doi.org/10.1021/acsanm.1c04281ACS Applied Nano Materials, v. 5, n. 2, p. 2603-2615, 2022.2574-0970http://hdl.handle.net/11449/23414710.1021/acsanm.1c042812-s2.0-85124621431Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengACS Applied Nano Materialsinfo:eu-repo/semantics/openAccess2022-05-01T13:41:37Zoai:repositorio.unesp.br:11449/234147Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-05-01T13:41:37Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Nanostructured Poly(methyl Methacrylate)-Silica Coatings for Corrosion Protection of Reinforcing Steel |
title |
Nanostructured Poly(methyl Methacrylate)-Silica Coatings for Corrosion Protection of Reinforcing Steel |
spellingShingle |
Nanostructured Poly(methyl Methacrylate)-Silica Coatings for Corrosion Protection of Reinforcing Steel Uvida, Mayara Carla [UNESP] corrosion protection organic-inorganic coating PMMA-silica hybrid reinforcing steel sol-gel |
title_short |
Nanostructured Poly(methyl Methacrylate)-Silica Coatings for Corrosion Protection of Reinforcing Steel |
title_full |
Nanostructured Poly(methyl Methacrylate)-Silica Coatings for Corrosion Protection of Reinforcing Steel |
title_fullStr |
Nanostructured Poly(methyl Methacrylate)-Silica Coatings for Corrosion Protection of Reinforcing Steel |
title_full_unstemmed |
Nanostructured Poly(methyl Methacrylate)-Silica Coatings for Corrosion Protection of Reinforcing Steel |
title_sort |
Nanostructured Poly(methyl Methacrylate)-Silica Coatings for Corrosion Protection of Reinforcing Steel |
author |
Uvida, Mayara Carla [UNESP] |
author_facet |
Uvida, Mayara Carla [UNESP] Trentin, Andressa [UNESP] Harb, Samarah Vargas [UNESP] Pulcinelli, Sandra Helena [UNESP] Santilli, Celso Valentim [UNESP] Hammer, Peter [UNESP] |
author_role |
author |
author2 |
Trentin, Andressa [UNESP] Harb, Samarah Vargas [UNESP] Pulcinelli, Sandra Helena [UNESP] Santilli, Celso Valentim [UNESP] Hammer, Peter [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Uvida, Mayara Carla [UNESP] Trentin, Andressa [UNESP] Harb, Samarah Vargas [UNESP] Pulcinelli, Sandra Helena [UNESP] Santilli, Celso Valentim [UNESP] Hammer, Peter [UNESP] |
dc.subject.por.fl_str_mv |
corrosion protection organic-inorganic coating PMMA-silica hybrid reinforcing steel sol-gel |
topic |
corrosion protection organic-inorganic coating PMMA-silica hybrid reinforcing steel sol-gel |
description |
In the absence of preventive maintenance, corrosion of structural steel by the deterioration of the passive layer due to exposure to aggressive environments is the main failure factor of reinforced concrete. To overcome economic, safety, and environmental implications, present research efforts focus on eco-friendly organic-inorganic hybrid coatings to achieve effective protection of reinforcing steel. Nanostructured PMMA (poly(methyl methacrylate))-silica coatings developed by combining reactions of the polymerization of methyl methacrylate and 3-[(methacryloxy)propyl]trimethoxysilane with the sol-gel hydrolytic condensation of tetraethyl orthosilicate using isopropanol as a solvent represent a promising approach to accomplish this goal. The nanoscale dispersion of silica nodes covalently conjugated with PMMA chains led to transparent, homogeneous, and pore-free coatings deposited with a thickness of 15 μm on 2D and 3D reinforcing steel. Mechanical, thermal, and surface analyses showed a strong adhesion of the coating to the substrate surface (15.9 MPa), a thermal stability of up to 256 °C, and a contact angle of about 75°. Electrochemical assays in standard 3.5 wt % NaCl solution, simulated carbonated, and alkaline concrete pore solutions confirmed effective corrosion protection, with an impedance modulus of up to 100 Gω cm2(at 4 mHz) and a lifetime of more than 670 days. Hence, PMMA-silica hybrid coatings are an eco-friendly and efficient alternative to protect reinforcing steel against corrosion, helping to prevent structural failures and fatal accidents. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-05-01T13:41:37Z 2022-05-01T13:41:37Z 2022-02-25 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1021/acsanm.1c04281 ACS Applied Nano Materials, v. 5, n. 2, p. 2603-2615, 2022. 2574-0970 http://hdl.handle.net/11449/234147 10.1021/acsanm.1c04281 2-s2.0-85124621431 |
url |
http://dx.doi.org/10.1021/acsanm.1c04281 http://hdl.handle.net/11449/234147 |
identifier_str_mv |
ACS Applied Nano Materials, v. 5, n. 2, p. 2603-2615, 2022. 2574-0970 10.1021/acsanm.1c04281 2-s2.0-85124621431 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
ACS Applied Nano Materials |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
2603-2615 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965543340441600 |