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Authors
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Motlagh, K. L. ; Seyfi, J. ; Khonakdar, H. A. ; Mortazavi, M.
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Title
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Vinyl ester/silica aerogel nanocomposite coatings with enhanced hydrophobicity and corrosion protection properties
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Date
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10.02.2021
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Number
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59954
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Abstract
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Vinyl ester (VE) resins have been widely used in the coating industry. However, research on its potential in anti-corrosion applications has been limited. In this work, silica aerogels were first synthesized and then incorporated into the VE resin at 5, 10, and 15·wt% with respect to the VE content. Based on the morphological results, higher inclusions of silica aerogels (10 and 15·wt%) were significantly aggregated at the surface layer of the coatings leading to a highly rough surface structure which was also proved by atomic force microscopy. In fact, the aerogel nanoparticles formed a very packed structure leading to the formation of an effective physical barrier against corrosive agents. Fourier-transform infrared spectroscopy also revealed that the nanocomposite coatings exhibited a lower water absorption behavior which could be beneficial for the anti-corrosion behavior. Wetting results demonstrated that the water contact angle has essentially increased from 61° for the pure VE coating to 92° for the aerogel-loaded coating. Such enhancement in hydrophobicity and also the creation of a physical barrier at the surface layer of the coatings led to promising barrier results as found by Tafel polarization curves. The protection efficiency was dramatically improved to 97.9% for the highest inclusion of silica aerogel.
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Publisher
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Polymers for Advanced Technologies
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Wikidata
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Citation
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Polymers for Advanced Technologies 32 (2021) 2176-2184
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DOI
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https://doi.org/10.1002/PAT.5249
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