Journal
MATTER
Volume 2, Issue 5, Pages 1187-1197Publisher
ELSEVIER
DOI: 10.1016/j.matt.2020.01.014
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Funding
- National Natural Science Foundation of China [21604070, 51822307, 51673169, 21625402]
- Natural Science Foundation of Zhejiang Province [LR18E030001]
- Science and Technology Project of Zhejiang Province [2019C03071]
- Fundamental Research Funds for the Central Universities [2018RC020]
- State Key Laboratory of Chemical Engineering [SKL-ChE-17D03]
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Advanced multifunctional devices increasingly rely on challenging complex shapes for their functions. 3D printing offers a solution but is often limited by the fabrication speed and/or material diversity. 4D printing based on digitally controlled 2D-to-3D transformation is advantageous in speed, but the accessible shapes are limited and integration of multiple materials is difficult. We report herein a concept that significantly extends the technological scope by combining 4D printing with modular assembly. Specifically, 4D photo-printed structures based on dynamically crosslinked polymers can be assembled in a modular fashion by interfacial bond exchange. Complex 3D objects with tailorable multiple materials can consequently be produced. This allows the fabrication of sophisticated shape-memory devices including a 3D Miura-patterned structure with zero Poisson's ratio and a Kresling-patterned cylindrical structure with superior mechanical stability. Our approach extends the possibilities for the future development of multifunctional devices with seamless integration of material, structure, and function.
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