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

Mirabedini, Mojtaba S. and Dutil, Isabelle and Gauquelin, Lucile and Yan, Ning and Farnood, Ramin R. Preparation of self-healing acrylic latex coatings using novel oil-filled ethyl cellulose microcapsules. (2015) Progress in Organic Coatings, 85. 168-177. ISSN 0300-9440

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Official URL: https://doi.org/10.1016/j.porgcoat.2015.03.024

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.

Item Type:Article
HAL Id:hal-01943657
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Iran Polymer and Petrochemical Institute - IPPI (IRAN)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > University of Toronto (CANADA)
Laboratory name:
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Deposited By: Loetitia MOYA
Deposited On:16 Oct 2018 11:31

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