Direct 4D printing of ceramics driven by hydrogel dehydration

Direct 4D printing of ceramics driven by hydrogel dehydration

26 January 2024 | Rong Wang, Chao Yuan, Jianxiang Cheng, Xiangnan He, Haitao Ye, Bingcong Jian, Honggeng Li, Jiaming Bai, Qi Ge
This paper presents a novel approach to direct 4D printing of ceramics, combining 3D printing with hydrogel dehydration and sintering. The authors develop a photocurable ceramic elastomer slurry and an acrylic acid hydrogel precursor, which are used in multimaterial digital light processing (DLP) 3D printing to create hydrogel-ceramic laminates. These laminates evolve into complex 3D structures due to hydrogel dehydration, and then transform into pure ceramics after sintering. A theoretical model is developed to calculate the curvatures of bent laminate and sintered ceramic parts, and a design flow is established to guide the fabrication of various complex ceramic objects. The approach offers significant flexibility and efficiency in creating complex 3D ceramic structures, opening new avenues for the application of ceramic materials in engineering fields.This paper presents a novel approach to direct 4D printing of ceramics, combining 3D printing with hydrogel dehydration and sintering. The authors develop a photocurable ceramic elastomer slurry and an acrylic acid hydrogel precursor, which are used in multimaterial digital light processing (DLP) 3D printing to create hydrogel-ceramic laminates. These laminates evolve into complex 3D structures due to hydrogel dehydration, and then transform into pure ceramics after sintering. A theoretical model is developed to calculate the curvatures of bent laminate and sintered ceramic parts, and a design flow is established to guide the fabrication of various complex ceramic objects. The approach offers significant flexibility and efficiency in creating complex 3D ceramic structures, opening new avenues for the application of ceramic materials in engineering fields.
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