Issue 38, 2016

Photoinitiated thiol–epoxy addition for the preparation of photoinduced self-healing fatty coatings

Abstract

Herein, we report the use of the photoinitiated thiol–epoxy chemistry for the preparation of a new biosourced self-healing coating. Epoxidized cottonseed oil is used as the main reagent (>80 wt%) and photocrosslinked in the presence of 0.25 equivalents of 7-mercapto-4-methyl coumarin, used as a photodimerizable and healable reactant. The reaction is initiated with 2 wt% of a photobase generator (PBG). The stability of the thiol–epoxy mixture under storage and the oxygen-promoted photoinitiating system are some of the advantages illustrated in this study. The physicochemical properties of the resulting coatings as well as the photoreversibility of the coumarin derivative once grafted on the vegetable oil are studied. The photoinitiation step is demonstrated to be efficient for the grafting of the healing reagent as well as for epoxy homopolymerization.

Graphical abstract: Photoinitiated thiol–epoxy addition for the preparation of photoinduced self-healing fatty coatings

Article information

Article type
Paper
Submitted
09 Feb 2016
Accepted
22 Mar 2016
First published
24 Mar 2016
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2016,6, 32098-32105

Photoinitiated thiol–epoxy addition for the preparation of photoinduced self-healing fatty coatings

Y. H. Zhao, D. Vuluga, L. Lecamp and F. Burel, RSC Adv., 2016, 6, 32098 DOI: 10.1039/C6RA03693G

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