Circular 3D printing of high-performance photopolymers through dissociative network design

IF 45.8 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2025-04-10 DOI:10.1126/science.ads3880

Bo Yang, Tiantian Ni, Jingjun Wu, Zizheng Fang, Kexuan Yang, Ben He, Xingqun Pu, Guancong Chen, Chujun Ni, Di Chen, Qian Zhao, Wei Li, Sujing Li, Hao Li, Ning Zheng, Tao Xie

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引用次数: 0

Abstract

One approach for closed-loop plastics recycling relies on reverting polymers back into monomers because one can then make new plastics without loss of properties. This depolymerization requirement restricts the molecular design to making polymers with high mechanical performance. We report a three-dimensional (3D) printing chemistry through stepwise photopolymerization by forming dithioacetal bonds. The polymerized network can be transformed back into a photoreactive oligomer by dissociation of the dithioacetal bonds. This network-oligomer transformation is reversible, therefore allowing circular 3D printing using the same material. Our approach offers the flexibility of making modular adjustments in the design of the network backbone of a polymer. This allows access to fully recyclable elastomers, crystalline polymers, and rigid glassy polymers with high mechanical toughness, making them potentially suitable for diverse applications.

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通过解离网络设计实现高性能光聚合物的圆形3D打印

闭环塑料回收的一种方法是将聚合物还原为单体，因为这样就可以在不损失性能的情况下制造新的塑料。这种解聚要求限制了分子设计以制造具有高机械性能的聚合物。我们报告了三维（3D）打印化学通过形成二硫缩醛键逐步光聚合。通过解离二硫缩醛键，聚合网络可以转化回光反应性低聚物。这种网络-低聚物转换是可逆的，因此可以使用相同的材料进行圆形3D打印。我们的方法提供了在设计聚合物的网络主干时进行模块化调整的灵活性。这样就可以获得完全可回收的弹性体、结晶聚合物和具有高机械韧性的刚性玻璃聚合物，使它们可能适用于各种应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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