Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 03722, Republic of Korea.
School of Mechanical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do, 16419, Republic of Korea.
Nat Commun. 2022 Mar 7;13(1):104. doi: 10.1038/s41467-021-27730-6.
Recent advances in metal additive manufacturing (AM) have provided new opportunities for prompt designs of prototypes and facile personalization of products befitting the fourth industrial revolution. In this regard, its feasibility of becoming a green technology, which is not an inherent aspect of AM, is gaining more interests. A particular interest in adapting and understanding of eco-friendly ingredients can set its important groundworks. Here, we demonstrate a water-based solid-phase binding agent suitable for binder jetting 3D printing of metals. Sodium salts of common fruit acid chelators form stable metal-chelate bridges between metal particles, enabling elaborate 3D printing of metals with improved strengths. Even further reductions in the porosity between the metal particles are possible through post-treatments. A compatibility of this chelation chemistry with variety of metals is also demonstrated. The proposed mechanism for metal 3D printing can open up new avenues for consumer-level personalized 3D printing of metals.
近年来，金属增材制造（AM）领域的进展为快速设计原型和轻松实现符合第四次工业革命要求的产品个性化提供了新的机会。在这方面，其作为绿色技术的可行性（这不是 AM 的固有方面）引起了更多的关注。适应和理解环保成分的特殊兴趣可以为其奠定重要的基础。在这里，我们展示了一种适用于金属粘结剂喷射 3D 打印的水性固相结合剂。常见果酸的钠盐在金属颗粒之间形成稳定的金属螯合桥，使金属的 3D 打印具有更高的强度。通过后处理甚至可以进一步降低金属颗粒之间的孔隙率。还证明了这种螯合化学与各种金属的兼容性。所提出的金属 3D 打印机制为消费者级别的金属 3D 打印开辟了新的途径。
