Onium Photocages for Visible-Light-Activated Poly(thiourethane) Synthesis and 3D Printing,Journal of the American Chemical Society

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Onium Photocages for Visible-Light-Activated Poly(thiourethane) Synthesis and 3D Printing
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2024-07-09 , DOI: 10.1021/jacs.4c07220
Meghan T Kiker ₁ , Ain Uddin ₁ , Lynn M Stevens ₁ , Connor J O'Dea ₁ , Keldy S Mason ₁ , Zachariah A Page ₁

Affiliation

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.

中文翻译：

用于可见光激活聚（硫氨酯）合成和 3D 打印的 Onium 光笼

3D 打印光驱动反应缺乏化学多样性，这给生产具有长期环境稳定性、可回收性和广泛性能（机械、光学等）的结构带来了挑战。在此，我们通过引入鎓光笼来快速形成聚硫氨酯 (PTU)，扩大了与 3D 打印兼容的光化学范围。高效的非敏化可见光光解释放有机膦和胺衍生物，以优异的时间控制催化硫醇-异氰酸酯加聚反应。开发了两种包含商用异氰酸酯和硫醇的树脂配方，用于数字光处理 (DLP) 3D 打印，以展示具有不同机械性能的高分辨率 PTU 物体的快速生产。 Onium 光笼是推进下一代高性能可持续材料的光驱动制造的宝贵工具。

更新日期：2024-07-09

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