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AssigneesUniversite Claude Bernard Lyon 1, Centre National De La Recherche Scientifique, Ecole Normale Superieure De Lyon
InventorsAkos Banyasz, Cyrille Monnereau, Patrice Baldeck, Caroline Arnoux
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A polymerization initiator molecule, excitable by two photons and capable of generating polymerization-initiating free radicals, includes two branches grafted onto a central phenyl nucleus. Each branch includes an oligomer of oligophenyleneethynylenyl type or oligo-2,5-dihalogenphenyleneethynylenyl type. A photopolymerizable composition, activatable by two-photon absorption, includes a radically polymerizable resin and a photochemically effective amount of a radical photoinitiator system. The photoinitiator system includes at least one initiator molecule as described above. Moreover, a method and an associated device for two-photon three-dimensional printing are disclosed. The method includes transforming a volume of a photopolymerizable composition including at least one initiator molecule. The transformation includes irradiating the volume of composition with an irradiation light source emitting an irradiation signal having a wavelength Lirr of between 1 and 1.5 times, and preferably between 1.1 and 1.25 times, a cut-off wavelength LCutOff of the initiator molecule. Embodiments may apply to submicron-resolution two-photon 3D printing.
A polymerization initiator molecule, capable of being excited by two photons and of generating polymerization-initiating free radicals, the molecule comprising two branches and a halogen atom grafted onto a central phenyl nucleus respectively at positions 1, 3, and 5, each of the branches comprising an oligomer of oligophenyleneethynylenyl type or oligo-2,5-dihalogenphenyleneethynylenyl type.
Dependencies are inferred from the claim text.