3D printing of multi-scalable structures via high penetration near-infrared photopolymerization

Junzhe Zhu, Qiang Zhang, Tianqing Yang, Yu Liu () and Ren Liu ()
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Junzhe Zhu: Jiangnan University
Qiang Zhang: Jiangnan University
Tianqing Yang: Jiangnan University
Yu Liu: Jiangnan University
Ren Liu: Jiangnan University

Nature Communications, 2020, vol. 11, issue 1, 1-7

Abstract: Abstract 3D printing consisted of in-situ UV-curing module can build complex 3D structures, in which direct ink writing can handle versatile materials. However, UV-based direct ink writing (DIW) is facing a trade-off between required curing intensity and effectiveness range, and it cannot implement multiscale parallelization at ease. We overcome these difficulties by ink design and introducing near-infrared (NIR) laser assisted module, and this increases the scalability of direct ink writing to solidify the deposited filament with diameter up to 4 mm, which is much beyond any of existing UV-assisted DIW. The NIR effectiveness range can expand to tens of centimeters and deliver the embedded writing capability. We also demonstrate its parallel manufacturing capability for simultaneous curing of multi-color filaments and freestanding objects. The strategy owns further advantages to be integrated with other types of ink-based 3D printing technologies for extensive applications.

Date: 2020
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DOI: 10.1038/s41467-020-17251-z

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