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

含可降解的亚硫酸酯键的可升级回收光聚合物助力实现可持续3D打印

作　　者：Beitao Liu Cijian Zhang Jiahui Li Guangsheng Zhang Xigao Jian Zhihuan Weng 刘贝涛;张慈剑;李佳惠;张广胜;蹇锡高;翁志焕

机构地区：[1]State Key Laboratory of Fine Chemicals,Frontiers Science Center for Smart Materials,Liaoning Technology Innovation Center of High Performance Resin Materials,Department of Polymer Science&Engineering,Dalian University of Technology,Dalian 116024,China

出　　处：《Science China Materials》2024年第12期4049-4058,共10页中国科学（材料科学）（英文版）

基　　金：supported by the National Natural Science Foundation of China(52073038 and 51873027);the National Key R&D Program of China(2022YFB3704600);the Fundamental Research Funds for the Central Universities(DUT22LAB605)。

摘　　要：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℃ 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 325.7µW 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.光固化3D打印技术的发展极大地增强了各领域的制造能力,但光敏聚合物的强交联网络不仅限制了光固化3D打印技术在信息加密领域的应用,同时其不可降解和回收性还加剧了环境危机.基于此,本研究设计了一种可降解的热固性光聚合物,通过在聚合物结构中引入可降解的亚硫酸酯键来实现信息加密和特定条件下的解密.由于亚硫酸酯键在酸性条件下水解时的自催化作用,该光聚合物可在温和条件下快速降解(50℃,45 min).利用所开发的光聚合物可降解的特点,结合光固化3D打印技术,我们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,信息解密过程中被降解的光聚合物经过简单的一步改性后,可用于制备功率密度为325.7µW cm^(−2)(一个太阳光强下)的高性能光电转换器.本工作不仅促进了基于3D打印技术的多重信息加密技术的发展,而且为应对塑料污染带来的环境挑战提供了切实可行的解决方案.

关 键 词：sustainable 3D printing thermosetting photopolymer upcycling information encryption solar thermoelectric generator 

分 类 号：TQ317[化学工程—高聚物工业] TP391.73[自动化与计算机技术—计算机应用技术]