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Programmable 4D Printing of Bioinspired Solvent‐Driven Morphing Composites
Author(s) -
Ren Luquan,
Li Zhuoshi,
Liu Qingping,
Ren Lei,
Wu Qian,
Li Bingqian,
Li Guiwei,
Song Zhengyi,
Zhou Xueli
Publication year - 2021
Publication title -
advanced materials technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.184
H-Index - 42
ISSN - 2365-709X
DOI - 10.1002/admt.202001289
Subject(s) - morphing , materials science , 3d printing , orientation (vector space) , composite material , composite number , process (computing) , computer science , geometry , computer graphics (images) , mathematics , operating system
Abstract In this article, we propose a bioinspired programmed 4D printing method. A combination of magnetic orientation process and grayscale 3D printing is used to achieve site‐specific orientation of the reinforcing fibers and gradient crosslinking of the matrix resin in the thickness direction within 2D composite films. After solventization and desolventization, 2D thin film structures can be transformed into complex 3D architectures, and the transformed 3D architectures can be permanently preserved without stimulation sources. Thus, the method can also be considered as an efficient 3D printing process. Then, the influences of crosslinking density, sample geometry, formulation, and fiber architecture on the deformation of the printed objects are investigated. Finally, as a proof of concept, various samples, including a hand, snowflake, and leaf, are printed to verify the feasibility of the proposed 4D printing strategy. This programmed 4D printing method provides a simple and effective reversible strategy, taking the full advantages of 4D printing and expanding the design space of 4D printing.