Multifunctional and Recyclable Bio‐Based Vitrimers With Tunable Properties for Sustainable Digital Light Processing 4D Printing

Recent advances in 4D printing have enabled the development of smart materials with programmable shapechanging capabilities. However, the concurrent realization of sustainability, reprocessability, and multifunctionality remains a key challenge. In this study, a bio‐based hybrid vitrimer resin is developed for Digital Light Processing (DLP) 4D printing, utilizing acrylate and epoxy monomers derived from soybean oil. This dual‐curable resin allows for compositional tuning, enabling precise control over mechanical, thermal, and rheological properties. The printed structures exhibit excellent shape memory and reconfiguration behavior, along with high printing resolution and surface fidelity. Importantly, the vitrimer network supports closed‐loop recycling through dynamic covalent bond exchange, allowing for repair, reprocessing, and reprinting without loss of structural or functional performance. By integrating environmental sustainability, structural versatility, and reusability into a single system, this work demonstrates the potential of bio‐based vitrimers as next‐generation intelligent materials for sustainable 4D printing and advanced additive manufacturing technologies.