Onium Photocages for Visible-Light-Activated Poly(thiourethane) Synthesis and 3D Printing.

Autor:	Kiker MT; Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States., Uddin A; Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States., Stevens LM; Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States., O'Dea CJ; Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States., Mason KS; Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States., Page ZA; Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States.
Jazyk:	angličtina
Zdroj:	Journal of the American Chemical Society [J Am Chem Soc] 2024 Jul 24; Vol. 146 (29), pp. 19704-19709. Date of Electronic Publication: 2024 Jul 09.
DOI:	10.1021/jacs.4c07220
Abstrakt:	The lack of chemical diversity in light-driven reactions for 3D printing poses challenges in the production of structures with long-term ambient stability, recyclability, and breadth in properties (mechanical, optical, etc.). Herein we expand the scope of photochemistries compatible with 3D printing by introducing onium photocages for the rapid formation of poly(thiourethanes) (PTUs). Efficient nonsensitized visible-light photolysis releases organophosphine and -amine derivatives that catalyze thiol-isocyanate polyaddition reactions with excellent temporal control. Two resin formulations comprising commercial isocyanates and thiols were developed for digital light processing (DLP) 3D printing to showcase the fast production of high-resolution PTU objects with disparate mechanical properties. Onium photocages represent valuable tools to advance light-driven manufacturing of next-generation high-performance sustainable materials.
Databáze:	MEDLINE
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