Direct 4D printing of ceramics driven by hydrogel dehydration

Rong Wang, Chao Yuan (), Jianxiang Cheng, Xiangnan He, Haitao Ye, Bingcong Jian, Honggeng Li, Jiaming Bai and Qi Ge ()
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Rong Wang: Southern University of Science and Technology
Chao Yuan: Xi’an Jiaotong University
Jianxiang Cheng: Southern University of Science and Technology
Xiangnan He: Southern University of Science and Technology
Haitao Ye: Southern University of Science and Technology
Bingcong Jian: Southern University of Science and Technology
Honggeng Li: Southern University of Science and Technology
Jiaming Bai: Southern University of Science and Technology
Qi Ge: Southern University of Science and Technology

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract 4D printing technology combines 3D printing and stimulus-responsive materials, enabling construction of complex 3D objects efficiently. However, unlike smart soft materials, 4D printing of ceramics is a great challenge due to the extremely weak deformability of ceramics. Here, we report a feasible and efficient manufacturing and design approach to realize direct 4D printing of ceramics. Photocurable ceramic elastomer slurry and hydrogel precursor are developed for the fabrication of hydrogel-ceramic laminates via multimaterial digital light processing 3D printing. Flat patterned laminates evolve into complex 3D structures driven by hydrogel dehydration, and then turn into pure ceramics after sintering. Considering the dehydration-induced deformation and sintering-induced shape retraction, we develop a theoretical model to calculate the curvatures of bent laminate and sintered ceramic part. Then, we build a design flow for direct 4D printing of various complex ceramic objects. This approach opens a new avenue for the development of ceramic 4D printing technology.

Date: 2024
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DOI: 10.1038/s41467-024-45039-y

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