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231226s2023 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202207673
|2 doi
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|a pubmed24n1170.xml
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|a (DE-627)NLM351057331
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|a (NLM)36594431
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Wong, Jitkanya
|e verfasserin
|4 aut
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|a Triplet Fusion Upconversion for Photocuring 3D-Printed Particle-Reinforced Composite Networks
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|c 2023
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 20.03.2023
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|a Date Revised 20.03.2023
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2023 Wiley-VCH GmbH.
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|a 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
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|a Journal Article
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|a 3D Printing
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|a composites
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|a direct-ink-write printing
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|a hydrogels
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|a photopolymerization
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|a triplet-triplet annihilation upconversion
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1 |
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|a Wei, Shixuan
|e verfasserin
|4 aut
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|a Meir, Rinat
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sadaba, Naroa
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ballinger, Nathan A
|e verfasserin
|4 aut
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|a Harmon, Elizabeth K
|e verfasserin
|4 aut
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1 |
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|a Gao, Xin
|e verfasserin
|4 aut
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1 |
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|a Altin-Yavuzarslan, Gokce
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Pozzo, Lilo D
|e verfasserin
|4 aut
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|a Campos, Luis M
|e verfasserin
|4 aut
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|a Nelson, Alshakim
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 35(2023), 11 vom: 03. März, Seite e2207673
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:35
|g year:2023
|g number:11
|g day:03
|g month:03
|g pages:e2207673
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|u http://dx.doi.org/10.1002/adma.202207673
|3 Volltext
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