Triplet Fusion Upconversion for Photocuring 3D-Printed Particle-Reinforced Composite Networks

Triplet Fusion Upconversion for Photocuring 3D-Printed Particle-Reinforced Composite Networks

© 2023 Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 11 vom: 03. März, Seite e2207673
1. Verfasser: Wong, Jitkanya (VerfasserIn)
Weitere Verfasser: Wei, Shixuan, Meir, Rinat, Sadaba, Naroa, Ballinger, Nathan A, Harmon, Elizabeth K, Gao, Xin, Altin-Yavuzarslan, Gokce, Pozzo, Lilo D, Campos, Luis M, Nelson, Alshakim
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article 3D Printing composites direct-ink-write printing hydrogels photopolymerization triplet-triplet annihilation upconversion
Beschreibung
Zusammenfassung:© 2023 Wiley-VCH GmbH.
High energy photons (λ < 400 nm) are frequently used to initiate free radical polymerizations to form polymer networks, but are only effective for transparent objects. This phenomenon poses a major challenge to additive manufacturing of particle-reinforced composite networks since deep light penetration of short-wavelength photons limits the homogeneous modification of physicochemical and mechanical properties. Herein, the unconventional, yet versatile, multiexciton process of triplet-triplet annihilation upconversion (TTA-UC) is employed for curing opaque hydrogel composites created by direct-ink-write (DIW) 3D printing. TTA-UC converts low energy red light (λmax  = 660 nm) for deep penetration into higher-energy blue light to initiate free radical polymerizations within opaque objects. As proof-of-principle, hydrogels containing up to 15 wt.% TiO2 filler particles and doped with TTA-UC chromophores are readily cured with red light, while composites without the chromophores and TiO2 loadings as little as 1-2 wt.% remain uncured. Importantly, this method has wide potential to modify the chemical and mechanical properties of complex DIW 3D-printed composite polymer networks
Beschreibung:Date Completed 20.03.2023
Date Revised 20.03.2023
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202207673