resumo
This work reports the synthesis and characterization of silica nanocapsules with biologically-active compounds 2-mercaptobenzothiazole and 4,5-dichloro-2-octyl-4-isothiazolin-3-one. The resulting particles were characterized by scanning electron microscopy, thermogravimetry and adsorption-desorption isotherms of N-2. The antibacterial activity was assessed for both nanocapsules dispersed in solution as well as incorporated in coating systems, using a recombinant bioluminescent Escherichia coli expressing the luxCDABE genes from the marine bioluminescent bacterium Aliivibrio fischeri. The decrease in light emission of the bacterial model, indicative as decrease of metabolic activity, was directly correlated with the level of biocide detected in solution by UV-Visible spectrophotometry. The results show that the developed nanomaterials show great potential for application in antifouling coatings. (C) 2015 Elsevier B.V. All rights reserved.
palavras-chave
ANTIFOULING COATINGS; 2-MERCAPTOBENZOTHIAZOLE; CORROSION; NANOCONTAINERS; POLYMERIZATION; DERIVATIVES; POLYMERS; SURFACES; PAINTS
categoria
Engineering
autores
Maia, F; Silva, AP; Fernandes, S; Cunha, A; Almeida, A; Tedim, J; Zheludkevich, ML; Ferreira, MGS
nossos autores
Frederico Calheiros Maia
Estudante de doutoramento
João Tedim
Professor associado
Mário Guerreiro Silva Ferreira
Professor(a) Jubilado(a)
Mikhail Zheludkevich
Investigador Principal ConvidadoProjectos
CICECO - Aveiro Institute of Materials (UID/CTM/50011/2013)
NANOMAR - Nanocontainer-based active coatings for maritime applications (NANOMAR)
agradecimentos
FM and JT thank FCT for PhD (SFRH/BD/72663/2010) and for Researcher (IF/00347/2013) grants, respectively. Authors thank Marie Curie IRSES project NANOMAR - Nanocontainer-based active coatings for maritime applications (No. 295145) and the Centre for Environmental and Marine Studies, University of Aveiro (CESAM, project Pest-C/MAR/LA0017/2013). This work was developed in the scope of the project CICECO-Aveiro Institute of Materials (Ref. FCT UID/CTM/50011/2013), financed by national funds through the FCT/MEC and when applicable co-financed by FEDER under the PT2020 Partnership Agreement.