Search Results - "Figueira, Rita B."

Hybrid sol–gel coatings for corrosion mitigation: a critical review by Figueira, Rita Bacelar

“…The corrosion process is a major source of metallic material degradation, particularly in aggressive environments, such as marine ones. Corrosion progression…”
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Electrochemical Sensors for Monitoring the Corrosion Conditions of Reinforced Concrete Structures: A Review by Figueira, Rita

“…Several methods for corrosion monitoring of reinforced concrete structures (RCS) have been proposed in the last few decades. These systems may be used either…”
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New Dinitrophenyl Hydrazones as Colorimetric Probes for Anions by Sousa, Rui P. C. L, Costa, Susana P. G, Figueira, Rita B, Raposo, M. Manuela M

“…Anion sensing is a dynamic research field due to the biological and environmental importance of some organic or inorganic anions. Hydrazones show promising…”
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Amino-Alcohol Organic-Inorganic Hybrid Sol-Gel Materials Based on an Epoxy Bicyclic Silane: Synthesis and Characterization by Sousa, Rui P. C. L., Figueira, Rita B., Callone, Emanuela, Dirè, Sandra, Costa, Susana P. G., Raposo, Maria Manuela M.

“…Organic-inorganic hybrids (OIHs) are a type of material that can be obtained using the sol-gel process and has the advantages of organic and inorganic moieties…”
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Hybrid Sol-Gel Matrices Doped with Colorimetric/Fluorimetric Imidazole Derivatives by Sousa, Rui P C L, Figueira, Rita B, Gomes, Bárbara R, Sousa, Sara, Ferreira, R Cristina M, Costa, Susana P G, Raposo, M Manuela M

“…Organic-inorganic hybrids (OIH) are materials that can be easily synthesized by the sol-gel method and combine the advantages of organic and inorganic moieties…”
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Chloride threshold value to initiate reinforcement corrosion in simulated concrete pore solutions: The influence of surface finishing and pH by Figueira, Rita B., Sadovski, Andrei, Melo, Ana P., Pereira, Elsa V.

“…[Display omitted] •The influence of steel surface finishing and pH of SCPS on the CTV was evaluated.•Surface finishing of the steel and the pH of SCPS should…”
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Hybrid sol–gel coatings for corrosion protection of hot-dip galvanized steel in alkaline medium by Figueira, Rita B., Silva, Carlos J.R., Pereira, Elsa V.

“…Two distinct organic–inorganic hybrid (OIH) matrices were synthesised using the sol–gel method and deposited on hot-dip galvanized steel (HDGS) by dip-coating…”
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Hot-dip galvanized steel dip-coated with ureasilicate hybrid in simulated concrete pore solution: Assessment of coating morphology and corrosion protection efficiency by Figueira, Rita B., Silva, Carlos J.R., Pereira, Elsa V.

“…•Electrochemical study of U(230) sol–gel coatings on HDGS in contact with SCPS.•The thickness of the coating film was found to be in a range between 3 and…”
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Optical fiber sensors based on sol-gel materials: design, fabrication and application in concrete structures by Figueira, Rita B, de Almeida, José M, Ferreira, Bárbara, Coelho, Luís, Silva, Carlos J. R

“…Optical fiber sensing systems have been widely developed for several fields such as biomedical diagnosis, food technology, military and industrial applications…”
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Organic-inorganic hybrid sol-gel materials doped with a fluorescent triarylimidazole derivative by Sousa, Rui Pedro Romero Amandi, Figueira, Rita Bacelar, Gomes, Bárbara R., Costa, Susana P. G., Azenha, Miguel, Pereira, Rui Francisco Gonçalves Pinto Fernandes, Raposo, M. Manuela M.

“…The development of sensors for pH monitoring is of extreme importance in the monitoring of concrete and reinforced concrete structures. Imidazole derivatives…”
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Hybrid Coatings Enriched with Tetraethoxysilane for Corrosion Mitigation of Hot-Dip Galvanized Steel in Chloride Contaminated Simulated Concrete Pore Solutions by Figueira, Rita B, Callone, Emanuela, Silva, Carlos J R, Pereira, Elsa V, Dirè, Sandra

“…Hybrid sol-gel coatings, named U(X):TEOS, based on ureasilicate matrices (U(X)) enriched with tetraethoxysilane (TEOS), were synthesized. The influence of TEOS…”
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Synthesis, optical and electrical characterization of amino-alcohol based sol-gel hybrid materials by Gomes, Bárbara R., Figueira, Rita B., Costa, Susana P. G., Raposo, M. Manuela M., Silva, Carlos J. R.

“…This manuscript describes the synthesis and characterization of five new organic–inorganic hybrid (OIH) sol-gel materials that were obtained from a…”
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Optical Fiber Sensors for Biocide Monitoring: Examples, Transduction Materials, and Prospects by Sousa, Rui P. C. L, Figueira, Rita B, Costa, Susana P. G, M. Raposo, M. Manuela

“…Antifouling biocides are toxic to the marine environment impacting negatively on the aquatic ecosystems. These biocides, namely, tributyltin (TBT) and Cu­(I)…”
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PDMS based hybrid sol-gel materials for sensing applications in alkaline environments: synthesis and characterization by Sousa, Rui P. C. L., Ferreira, Bárbara, Azenha, Miguel, Costa, Susana P. G., Silva, Carlos J. R., Figueira, Rita Bacelar

“…Nowadays, concrete degradation is a major problem in the civil engineering field. Concrete carbonation, one of the main sources of structures’ degradation,…”
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Organic–Inorganic Hybrid Sol–Gel Material Loaded with an Heterocyclic Aldehyde with Potential Application for Cu(II) Detection by Rui P. C. L. Sousa, Susana P. G. Costa, Rita B. Figueira, Maria Manuela M. Raposo

“…Organic–inorganic hybrids (OIH) are a versatile type of material that joins organic and inorganic moieties in a polymeric matrix and can be easily synthesized…”
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Quinoline-Based Hydrazone Derivative as a Biocide Chemosensor: Synthesis and Sensing Studies by Rui P. C. L. Sousa, Susana P. G. Costa, Rita B. Figueira, M. Manuela M. Raposo

“…Tributyltin (TBT) is an organic biocide used on antifouling paints to avoid biofouling on boats and submersed structures. It is toxic to a variety of aquatic…”
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Energetics and Structure of Hydroxynicotinic Acids. Crystal Structures of 2-, 4-, 6-Hydroxynicotinic and 5-Chloro-6-hydroxynicotinic Acids by Santos, Rui C, Figueira, Rita M. B. B. M, Piedade, M. Fátima M, Diogo, Hermínio P, Minas da Piedade, Manuel E

“…The relationship between energetics and structure in 2-, 4-, 5-, and 6-hydroxynicotinic and 5-chloro-6-hydroxynicotinic acids (2HNA, 4HNA, 5HNA, 6HNA, and…”
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Quinoline-based hydrazones for biocide detection: Machine learning-aided design of new TBT chemosensors by Sousa, Rui P.C.L., Teixeira, Filipe, Costa, Susana P.G., Figueira, Rita B., Raposo, M. Manuela M.

“…Antifouling compounds are used as paint components to mitigate biofouling on ships and submerged structures. One of the most known and used antifouling…”
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Organic-inorganic hybrid sol–gel membranes for pH sensing in highly alkaline environment by Ferreira, Bárbara, Sousa, Sara, Sousa, Rui P.C.L., Costa, Susana P.G., Raposo, M. Manuela M., Parpot, Pier, Valente, Artur J.M., Pereira, Rui F.P., Figueira, Rita B.

“…•Resistance are > 107 Ω cm2 therefore the OIHs are fit for alkaline environments.•Presence of phph in the OIH matrix does not affect the OIH dielectric…”
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Hybrid sol–gel coatings for corrosion protection of galvanized steel in simulated concrete pore solution by Figueira, Rita B., Silva, Carlos J. R., Pereira, Elsa V.

“…The aim of this experimental research was to study the electrochemical behavior of organic–inorganic hybrid (OIH) coatings for corrosion protection of hot-dip…”
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