Light-Driven, Reversible Spatiotemporal Control of Dynamic Covalent Polymers
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in: Advanced materials, Jahrgang 36.2024, Nr. 47, 2411307, 21.11.2024.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
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TY - JOUR
T1 - Light-Driven, Reversible Spatiotemporal Control of Dynamic Covalent Polymers
AU - Reisinger, David
AU - Sietmann, Alexander
AU - Das, Ankita
AU - Plutzar, Sarah
AU - Korotkov, Roman
AU - Rossegger, Elisabeth
AU - Walluch, Matthias
AU - Holler-Stangl, Stefan
AU - Hofer, Thomas S.
AU - Dielmann, Fabian
AU - Glorius, Frank
AU - Schlögl, Sandra
N1 - Publisher Copyright: © 2024 Wiley-VCH GmbH.
PY - 2024/11/21
Y1 - 2024/11/21
N2 - Dynamic covalent polymer networks exhibit a cross-linked structure like conventional thermosets and elastomers, although their topology can be reorganized through externally triggered bond exchange reactions. This characteristic enables a unique combination of repairability, recyclability and dimensional stability, crucial for a sustainable industrial economy. Herein the application of a photoswitchable nitrogen superbase is reported for the spatially resolved and reversible control over dynamic bond exchange within a thiol-ene photopolymer. By the exposure to UV or visible light, the associative exchange between thioester links and thiol groups is successfully gained control over, and thereby the macroscopic mechanical material properties, in a locally controlled manner. Consequently, the resulting reorganization of the global network topology enables to utilize this material for previously unrealizable advanced applications such as spatially resolved, reversible reshaping as well as micro-imprinting over multiple steps. Finally, the presented concept contributes fundamentally to the evolution of dynamic polymers and provides universal applicability in covalent adaptable networks relying on a base-catalyzed exchange mechanism.
AB - Dynamic covalent polymer networks exhibit a cross-linked structure like conventional thermosets and elastomers, although their topology can be reorganized through externally triggered bond exchange reactions. This characteristic enables a unique combination of repairability, recyclability and dimensional stability, crucial for a sustainable industrial economy. Herein the application of a photoswitchable nitrogen superbase is reported for the spatially resolved and reversible control over dynamic bond exchange within a thiol-ene photopolymer. By the exposure to UV or visible light, the associative exchange between thioester links and thiol groups is successfully gained control over, and thereby the macroscopic mechanical material properties, in a locally controlled manner. Consequently, the resulting reorganization of the global network topology enables to utilize this material for previously unrealizable advanced applications such as spatially resolved, reversible reshaping as well as micro-imprinting over multiple steps. Finally, the presented concept contributes fundamentally to the evolution of dynamic polymers and provides universal applicability in covalent adaptable networks relying on a base-catalyzed exchange mechanism.
KW - dynamic covalent polymers
KW - multi-step micro-imprinting
KW - multi-step reshaping
KW - photopolymerization
KW - photoswitchable base catalysts
KW - reversible photoactivation
UR - http://www.scopus.com/inward/record.url?scp=85205573346&partnerID=8YFLogxK
U2 - 10.1002/adma.202411307
DO - 10.1002/adma.202411307
M3 - Article
AN - SCOPUS:85205573346
VL - 36.2024
JO - Advanced materials
JF - Advanced materials
SN - 0935-9648
IS - 47
M1 - 2411307
ER -
