Upcyclable thermosetting photopolymer containing degradable sulfite bonds for sustainable 3D printing

IF 6.8 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Science China Materials Pub Date : 2024-10-12 DOI:10.1007/s40843-024-3113-2

Beitao Liu (, ), Cijian Zhang (, ), Jiahui Li (, ), Guangsheng Zhang (, ), Xigao Jian (, ), Zhihuan Weng (, )

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Abstract

The advancement of photo-curing three-dimensional (3D) printing technology has significantly enhanced the capabilities of advanced manufacturing across various fields. However, the robust cross-linking network of photopolymers limits its application in information encryption and exacerbates environmental issues. In this study, a degradable thermosetting photopolymer platform for information encryption was proposed by incorporating sulfite bonds into the polymer structure. Due to the autocatalytic behavior of sulfite bonds during hydrolysis under acidic conditions, the photopolymer can achieve complete degradation at 50°C within 45 min. Based on the degradability of the developed photopolymers, a highly secure degradation-UV dual information encryption system has been established using photo-curing-based 3D printing technology. Furthermore, the degradation products of these photopolymers, generated during the information decryption process, can be utilized to prepare high-performance solar thermoelectric generators with a power density of 325.7 µW cm⁻² (under one sun) after a simple one-step modification. This work not only inspires the development of multiple information encryption methods based on 3D printing but also provides a practical solution to address environmental challenges associated with plastic pollution.

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用于可持续 3D 打印的含有可降解亚硫酸盐键的可循环热固性光聚合物

光固化三维（3D）打印技术的发展大大提高了各领域先进制造的能力。然而，光聚合物的强交联网络限制了其在信息加密领域的应用，并加剧了环境问题。本研究通过在聚合物结构中加入亚硫酸盐键，提出了一种用于信息加密的可降解热固性光聚合物平台。由于亚硫酸盐键在酸性条件下水解时具有自催化行为，该光敏聚合物可在 50°C 温度下于 45 分钟内实现完全降解。基于所开发的光聚合物的降解性，利用基于光固化的 3D 打印技术建立了一个高度安全的降解-紫外线双重信息加密系统。此外，这些光聚合物在信息解密过程中产生的降解产物经过简单的一步改性后，可用于制备功率密度为 325.7 µW cm-2（一个太阳下）的高性能太阳能热电发电机。这项工作不仅启发了基于三维打印技术的多种信息加密方法的开发，而且为应对与塑料污染相关的环境挑战提供了一种实用的解决方案。

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.