Silica nanocontainers with rhodamine B acylhydrazone for early fluorescent detection of steel corrosion.

Autor:	Mal'tanova A; Research Institute for Physical Chemical Problems, Belarusian State University Leningradskaya Str. 14 220006 Minsk Belarus poznyak@bsu.by., Bel'ko N; A. N. Sevchenko Institute of Applied Physical Problems, Belarusian State University Kurchatova Str. 7 220045 Minsk Belarus., Kulahava T; Institute for Nuclear Problems, Belarusian State University Bobruiskaya Str. 11 220006 Minsk Belarus., Samtsov M; A. N. Sevchenko Institute of Applied Physical Problems, Belarusian State University Kurchatova Str. 7 220045 Minsk Belarus., Poznyak S; Research Institute for Physical Chemical Problems, Belarusian State University Leningradskaya Str. 14 220006 Minsk Belarus poznyak@bsu.by.
Jazyk:	angličtina
Zdroj:	RSC advances [RSC Adv] 2024 Dec 09; Vol. 14 (52), pp. 38739-38745. Date of Electronic Publication: 2024 Dec 09 (Print Publication: 2024).
DOI:	10.1039/d4ra07677j
Abstrakt:	Developing new materials for efficient fluorescent detection of metal corrosion is a highly relevant task. One challenge is that highly sensitive sensors might lose functionality after exposure to certain coating formulations. In this work, silica nanocontainers are used to encapsulate rhodamine B acylhydrazone, an efficient pH sensor. The resulting nanomaterial is then used in water-based epoxy and acrylic coatings for early-stage detection of steel corrosion. Coatings with as little as 0.01 wt% rhodamine B acylhydrazone show a marked increase in fluorescence intensity that correlates with the onset of steel corrosion. Coatings containing the dye encapsulated in silica nanocontainers demonstrate a significantly stronger response (4 times) compared to coatings containing the dye without an encapsulating agent. Furthermore, encapsulating rhodamine B acylhydrazone improves the dispersion of this hydrophobic dye in epoxy and acrylic coating formulations without requiring an organic solvent. The ability of the resulting coatings to detect corrosion by changes in fluorescence is validated by fluorescence spectroscopy and microscopy. Impedance spectroscopy investigations indicate that silica nanocontainers improve the barrier properties of the composite epoxy coatings on steel. The encapsulation of highly sensitive and hydrophobic molecules in silica nanocontainers can be an effective method for preparing smart coatings with desired characteristics. Competing Interests: There are no conflicts to declare. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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