Development of Water-Soluble Type I Photoinitiators for Hydrogel Synthesis
Bérengère Aubry,
Frédéric Dumur,
Muriel Lansalot,
Elodie Bourgeat-Lami,
Emmanuel Lacôte,
Jacques Lalevée
Affiliations
Bérengère Aubry
Université de Haute-Alsace, CNRS, IS2M UMR 7361, F-68100 Mulhouse, France
Frédéric Dumur
Aix Marseille Univ, CNRS, ICR UMR 7273, F-13397 Marseille, France
Muriel Lansalot
Univ Lyon, Université Claude Bernard Lyon 1, CNRS, CPE Lyon, UMR 5128, Catalysis, Polymerization, Processes and Materials (CP2M), 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
Elodie Bourgeat-Lami
Univ Lyon, Université Claude Bernard Lyon 1, CNRS, CPE Lyon, UMR 5128, Catalysis, Polymerization, Processes and Materials (CP2M), 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
Emmanuel Lacôte
Univ Lyon, Université Claude Bernard Lyon 1, CNRS, CNES, ArianeGroup, LHCEP, Bât. Raulin, 2 Rue Victor Grignard, F-69622 Villeurbanne, France
Jacques Lalevée
Université de Haute-Alsace, CNRS, IS2M UMR 7361, F-68100 Mulhouse, France
In this work, two new water-soluble photoinitiators based on the α-alkoxy-arylketone scaffold have been synthesized and investigated for their ability to initiate photopolymerization for the preparation of hydrogels. The efficiency of these new Type I photoinitiators was compared to that of benchmark ones (2-hydroxy-4′-(2-hydroxyethoxy)-2-methylpropiophenone—Irgacure 2959 and 2-hydroxy-2-methyl propiophenone—Irgacure 1173). In combination with additive (carbene-borane), a good initiating ability was found under air. Mechanical properties of the prepared hydrogels were investigated by tensile tests and dynamic mechanical analysis (DMA). Markedly, hydrogels could be prepared with the newly proposed initiating systems in mild conditions (i.e., under air, using low light intensity @405 or 395 nm and without specialized glassware) and exhibited similar properties to those prepared by harsher approaches (thermal treatment or UV light).
