Journal
POLYMERS
Volume 13, Issue 14, Pages -Publisher
MDPI
DOI: 10.3390/polym13142325
Keywords
3D printings; additive manufacturing; polymerization kinetics; photoredox; monomer conversion; synergic effects; cationic; free radical; UV visible light
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Funding
- Agence Nationale de la Recherche (ANR agency) through the NoPerox grant
- 359 China Medical University [CMU109-S-39]
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This review explores the synergic features and enhancing strategies for various photopolymerization systems, including treatments using different light sources and photosensitizers, synergic effects in initiator systems, and the use of copper-complex photoredox catalysts. By presenting these features, the review not only bridges modeling and measurements, but also guides further experimental studies and applications in 3D printing and additive manufacturing.
The synergic features and enhancing strategies for various photopolymerization systems are reviewed by kinetic schemes and the associated measurements. The important topics include (i) photo crosslinking of corneas for the treatment of corneal diseases using UVA-light (365 nm) light and riboflavin as the photosensitizer; (ii) synergic effects by a dual-function enhancer in a three-initiator system; (iii) synergic effects by a three-initiator C/B/A system, with electron-transfer and oxygen-mediated energy-transfer pathways; (iv) copper-complex (G1) photoredox catalyst in G1/Iod/NVK systems for free radical (FRP) and cationic photopolymerization (CP); (v) radical-mediated thiol-ene (TE) photopolymerizations; (vi) superbase photogenerator based-catalyzed thiol-acrylate Michael (TM) addition reaction; and the combined system of TE and TM using dual wavelength; (vii) dual-wavelength (UV and blue) controlled photopolymerization confinement (PC); (viii) dual-wavelength (UV and red) selectively controlled 3D printing; and (ix) three-wavelength selectively controlled in 3D printing and additive manufacturing (AM). With minimum mathematics, we present (for the first time) the synergic features and enhancing strategies for various systems of multi-components, initiators, monomers, and under one-, two-, and three-wavelength light. Therefore, this review provides not only the bridging between modeling and measurements, but also guidance for further experimental studies and new applications in 3D printings and additive manufacturing (AM), based on the innovative concepts (kinetics/schemes).
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