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Journal Articles Progress in Organic Coatings Year : 2015

Preparation of self-healing acrylic latex coatings using novel oil-filled ethyl cellulose microcapsules

Abstract

Novel oil-filled microcapsules were prepared by introducing a phase separation method using ethyl cellulose as a shell-forming containing rapeseed oil. The prepared oil-filled microcapsules were evaluated by optical microscopy, scanning electron microscopy and particle size analysis. Results showed that spherical microcapsules with a diameter of 10 to 45 μm and a rough porous shell were obtained. Carboxylated styrene/butadiene copolymer latex films containing various levels of these microcapsules were subjected to various levels of pre-elongation and their tensile properties were examined. The addition of oil-filled microcapsules resulted in a significant improvement in the modulus, strain-to-break, and toughness of the films. The self-healing mechanism of latex films was examined through the colorimetric measurements of the release of dye-containing following the pre-elongation of the samples. These measurements confirmed that pre-elongation of samples resulted in the release of oil within the latex films, hence plasticizing the surrounding polymeric network and partly restoring the mechanical properties of the pre-elongated films.
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Dates and versions

hal-01943657 , version 1 (04-12-2018)

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Mojtaba S. Mirabedini, Isabelle Dutil, Lucile Gauquelin, Ning Yan, Ramin R. Farnood. Preparation of self-healing acrylic latex coatings using novel oil-filled ethyl cellulose microcapsules. Progress in Organic Coatings, 2015, 85, pp.168-177. ⟨10.1016/j.porgcoat.2015.03.024⟩. ⟨hal-01943657⟩
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