Double-capsule self-repairing epoxy coating and preparation method thereof
An epoxy coating, self-healing technology, used in microcapsule preparations, microsphere preparation and other directions, can solve the problems of low encapsulation efficiency, inability to provide sufficient structural stability, emulsion droplet fusion, demulsification, etc., to improve the encapsulation efficiency. volume, improve repair efficiency, and prevent the effect of milk droplet fusion
Inactive Publication Date: 2016-08-10
SOUTH CHINA UNIV OF TECH
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Abstract
The invention discloses a double-capsule self-repairing epoxy coating and a preparation method thereof. The preparation method mainly uses Pickering emulsion droplet template method and conducts an interface polymerization of interface isophorone diisocyanate and tetraethylenepentamine in water-oil of epoxy interface to prepare epoxy microcapsule and tetraethylenepentamine microcapsule; and the two microcapsules are added to epoxy resin microcapsules for the formation of double-capsule self-repairing epoxy coating. The Pickering emulsion droplet template method ensures the stability of the emulsion, prevents emulsion droplet blending, improves package amount and efficiency of the microcapsule core material; Pickering emulsion improves the repair efficiency of the double-capsule self-repairing epoxy coating; the introduction of nano silica particles and nano clay in the capsule walls of the epoxy microcapsule and tetraethylenepentamine microcapsule improves the mechanical strength and thermal stability of the microcapsule wall, but also improves the brittleness of the microcapsule and the releasing efficiency of the microcapsule core material, so as to ensure the repair performance of the double-capsule self-repair coating.
Application Domain
Microballoon preparationMicrocapsule preparation
Technology Topic
ChemistrySilicon dioxide +12
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