Norbornene Dicarboximide: A Green Alternative for Thiol-Norbornene Photopolymers,ACS Macro Letters

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Norbornene Dicarboximide: A Green Alternative for Thiol-Norbornene Photopolymers
ACS Macro Letters ( IF 5.1 ) Pub Date : 2024-07-11 , DOI: 10.1021/acsmacrolett.4c00334
Warrick Ma ₁ , Nathaniel Wright ₂ , Yadong Wang ₂

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Carbic anhydride is an underappreciated starting material for 3D-printable, non-hydrogel photopolymers. Compared with other norbornene precursors, carbic anhydride is cheaper and reactive via aminolysis. As a result, the generalized and efficient functionalization with carbic anhydride can increase the utilization of thiol-norbornene photopolymers. Here, we report carbic anhydride’s catalyst-free condensation with two commodity polymers: amine-functionalized polypropylene glycol and polydimethylsiloxane. The reaction completes in 1 h, produces water as the only byproduct, and does not require purification. It is therefore affordable, facile, and green. Mixing the product with thiol cross-linkers and the appropriate photoadditives produces photopolymers that are printable via Digital Light Processing. The photopolymers exhibit tunable tensile properties and a functional surface by varying the polymer backbone and thiol stoichiometry. Moreover, the photopolymers are 3D-printed into true-to-scale human aorta models and porous scaffolds with high resolution. The simple yet versatile platform will benefit additive manufacturing of soft materials and beyond.

中文翻译：

降冰片烯二甲酰亚胺：硫醇-降冰片烯光聚合物的绿色替代品

碳酸酐是一种未被充分重视的 3D 打印非水凝胶光聚合物原材料。与其他降冰片烯前体相比，碳酐更便宜并且通过氨解反应。因此，用碳酐进行通用且有效的官能化可以提高硫醇-降冰片烯光聚合物的利用率。在这里，我们报道了碳酐与两种商品聚合物的无催化剂缩合：胺官能化聚丙二醇和聚二甲基硅氧烷。反应在 1 小时内完成，产生水作为唯一的副产物，并且不需要纯化。因此，它价格实惠、方便且绿色。将产品与硫醇交联剂和适当的光添加剂混合可产生可通过数字光处理进行印刷的光聚合物。通过改变聚合物主链和硫醇化学计量，光聚合物表现出可调节的拉伸性能和功能表面。此外，光聚合物可 3D 打印成真实比例的人体主动脉模型和高分辨率的多孔支架。这个简单而多功能的平台将有利于软材料及其他材料的增材制造。

更新日期：2024-07-11

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