Highly ordered mesoporous silica loaded with dodecylamine for smart anticorrosion coatings
Carregando...
Data
Data de publicação
Autores IPEN
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Surface & Coatings Technology
Exportar
Resumo
The development of nanoscience and technology has devoted significant attention to studies on hollowparticles.
Among these materials, mesoporous silica nanoparticles have recently attracted attention as potential
nanocontainers due to their high stability, biocompatibility, large surface area, controllable pore diameter and
easy surface functionalization.Mesoporous silica nanoparticles can uptake, store and release organic or inorganic
molecules of various sizes, shapes and functionalities. The aimof thiswork is to study the use ofmesoporous silica
with hexagonally ordered (4–14 nm) for active corrosion protection of carbon steel.Mesoporous silicawas characterized
by X-ray diffraction (XRD), nitrogen adsorption isotherms, scanning electron microscopy (SEM) and
transmission electron microscopy (TEM). Mesoporous silica structures were loaded with dodecylamine and embedded
into an alkyd primer with a weight load ratio of 15 wt.% of mesoporous silica. Kinetics of the release of
inhibitor was evaluated by electrochemical impedance measurements in aerated 0.1 mol/L NaCl solution containing
1 wt.% of mesoporous silica at different pH values (2.0, 6.2 and 9.0).
The anticorrosive performance of carbon steel coatedwith alkyd primer loadedwith 15wt.% ofmesoporous silica
with entrapped dodecylamine was demonstrated by electrochemical impedance spectroscopy (EIS) and scanning
vibrating electrode technique (SVET). Kinetics of inhibitor releasing curves showed that for pH 2.0 condition
the release of inhibitor was faster in comparison to other pH conditions (9.0 and 6.2) showing that this complex
porous system provides high loading capacity and efficient inhibitor release in lowpH. In addition, due to the release
of inhibitor during the corrosion process,well-pronounced active anticorrosion properties and self-healing
were provided and confirmed by EIS and SVET measurements. Coated sampleswere also evaluated in a salt spray
chamber and the self-healing effect was also remarkable.
Como referenciar
FALCON, J.M.; OTUBO, L.; AOKI, I.V. Highly ordered mesoporous silica loaded with dodecylamine for smart anticorrosion coatings. Surface & Coatings Technology, v. 303, p. 319-329, 2016. DOI: 10.1016/j.surfcoat.2015.11.029. Disponível em: http://repositorio.ipen.br/handle/123456789/26994. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.