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AuthorVijayan P., Poornima
AuthorAl-Maadeed, Mariam Ali S.A.
Available date2017-01-04T05:17:18Z
Publication Date2016-12-12
Publication NameScientific Reports
Identifierhttp://dx.doi.org/10.1038/srep38812
CitationVijayan P., P. and Al-Maadeed, M. A. S. A. "TiO2 nanotubes and mesoporous silica as containers in self-healing epoxy coatings." Sci. Rep. 6, 38812;
ISSN2045-2322
URIhttp://hdl.handle.net/10576/5138
AbstractThe potential of inorganic nanomaterials as reservoirs for healing agents is presented here. Mesoporous silica (SBA-15) and TiO2 nanotubes (TNTs) were synthesized. Both epoxy-encapsulated TiO2 nanotubes and amine-immobilized mesoporous silica were incorporated into epoxy and subsequently coated on a carbon steel substrate. The encapsulated TiO2 nanotubes was quantitatively estimated using a ‘dead pore ratio’ calculation. The morphology of the composite coating was studied in detail using transmission electron microscopic (TEM) analysis. The self-healing ability of the coating was monitored using electrochemical impedance spectroscopy (EIS); the coating recovered 57% of its anticorrosive property in 5 days. The self-healing of the scratch on the coating was monitored using Scanning Electron Microscopy (SEM). The results confirmed that the epoxy pre-polymer was slowly released into the crack. The released epoxy pre-polymer came into contact with the amine immobilized in mesoporous silica and cross-linked to heal the scratch.
SponsorThis paper was made possible by PDRA grant # PDRA1-1216-13014 from the Qatar National Research Fund (a member of Qatar Foundation).
Languageen
PublisherNature Publishing Group
SubjectComposites
Organic–inorganic nanostructures
TitleTiO2 nanotubes and mesoporous silica as containers in self-healing epoxy coatings
TypeArticle
Volume Number6
dc.accessType Open Access


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