A general fruit acid chelation route for eco-friendly and ambient 3D printing of metals

Soo Young Cho, Dong Hae Ho, Yoon Young Choi, Soomook Lim, Sungjoo Lee, Ji Won Suk, Sae Byeok Jo () and Jeong Ho Cho ()
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Soo Young Cho: Yonsei University
Dong Hae Ho: Yonsei University
Yoon Young Choi: Yonsei University
Soomook Lim: Sungkyunkwan University
Sungjoo Lee: Sungkyunkwan University
Ji Won Suk: Sungkyunkwan University
Sae Byeok Jo: Sungkyunkwan University
Jeong Ho Cho: Yonsei University

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract 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.

Date: 2022
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DOI: 10.1038/s41467-021-27730-6

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