The development of renewable vinyl-based photopolymer resins offers a promising solution to reducing the environmental impact associated with 3D printed materials. This study introduces a bifunctional lipoate cross-linker containing a dynamic disulfide bond, which is combined with acrylic monomers (n-butyl acrylate) and conventional photoinitiators to develop photopolymer resins that are compatible with commercial stereolithography 3D printing. The incorporation of disulfide bonds within the polymer network’s backbone imparts the 3D printed objects with self-healing capabilities and complete degradability. Remarkably, the degraded resin can be fully recycled and reused for high-resolution reprinting of complex structures while preserving mechanical properties that are comparable to the original material. This proof-of-concept study not only presents a sustainable strategy for advancing acrylate-based 3D printing materials, but also introduces a novel approach for fabricating fully recyclable 3D-printed structures. This method paves the way for reducing the environmental impact while enhancing material reusability, offering significant potential for the development of eco-friendly additive manufacturing.

中文翻译：

---

用于基于硫辛酸的液晶显示器 3D 打印的可持续和可回收丙烯酸酯树脂


可再生乙烯基光敏树脂的开发为减少与 3D 打印材料相关的环境影响提供了一种有前途的解决方案。本研究介绍了一种含有动态二硫键的双功能硫辛酸盐交联剂，它与丙烯酸单体（丙烯酸正丁酯）和常规光引发剂相结合，开发出与商业立体光固化成型 3D 打印兼容的光敏树脂。在聚合物网络的主链中掺入二硫键，使 3D 打印物体具有自愈能力和完全可降解性。值得注意的是，降解的树脂可以完全回收和再用于复杂结构的高分辨率打印，同时保持与原始材料相当的机械性能。这项概念验证研究不仅提出了一种推进丙烯酸酯基 3D 打印材料的可持续策略，还引入了一种制造完全可回收 3D 打印结构的新方法。这种方法为减少环境影响铺平了道路，同时提高了材料的可重用性，为环保增材制造的发展提供了巨大的潜力。