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

IF 44.7 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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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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