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Facile strategy toward the development of a self-healing coating by electrospray method
Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran. Department of Environmental Science and Policy, Università degli Studi di Milano, Milan, Italy.
Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Department of Materials and Polymer Engineering, Hakim Sabzevari University, Sabzevar, Iran.ORCID iD: 0000-0003-1486-0856
Department of Material Engineering, Isfahan University of Technology, Isfahan, Iran.
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2019 (English)In: Materials Research Express, ISSN 2053-1591, Vol. 6, no 11, article id 116444Article in journal (Refereed) Published
Abstract [en]

A self-healing anti-corrosion epoxy coating was prepared by the incorporation of dual capsule healing system. Microcapsules were prepared through the facile electrospray method by using Poly(styrene-co-acrylonitrile) polymer as shell material. Polyetheramine and Methylene diphenyl diisocyanate (MDI) based isocyanate prepolymer were utilized as core materials because of their high reactivity and low sensitivity in forming polyurea polymers. Scanning electron microscopy (sem) images confirmed the spherical morphology of the prepared microcapsules with average diameters of 0.93 ± 0.55 μm and 1.21 ± 0.68 μm for the encapsulated polyetheramine and isocyanate microcapsules, respectively. Moreover, transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA) results confirmed the successful encapsulation of both core materials with a high encapsulation yield (71% and 68% for Polyetheramine and MDI based isocyanate respectively). Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization technique were used to assess the effects of utilizing the aforementioned system on the intrinsic anti-corrosion barrier property (on pristine samples ) and the self-healing efficiency (after cross scratching) of the resulting smart coatings. The corrosion assessment results confirmed the self-healing performance of the incorporated capsules along with a high healing efficiency (85%) for the optimum microcapsule content.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2019. Vol. 6, no 11, article id 116444
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
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URN: urn:nbn:se:ltu:diva-76823DOI: 10.1088/2053-1591/ab4d1bISI: 000494320200001Scopus ID: 2-s2.0-85075269022OAI: oai:DiVA.org:ltu-76823DiVA, id: diva2:1372294
Note

Validerad;2019;Nivå 2;2019-11-22 (johcin)

Available from: 2019-11-22 Created: 2019-11-22 Last updated: 2019-12-09Bibliographically approved

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Neisiany, Rasoul Esmaeely

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