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4D Printing Auxetic Metamaterials with Tunable, Programmable, and Reconfigurable Mechanical Properties
Author(s) -
Xin Xiaozhou,
Liu Liwu,
Liu Yanju,
Leng Jinsong
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202004226
Subject(s) - auxetics , metamaterial , materials science , stretchable electronics , reconfigurability , 3d printing , bending , flexible electronics , deformation (meteorology) , electronics , nanotechnology , optoelectronics , composite material , computer science , electrical engineering , telecommunications , engineering
Auxetic mechanical metamaterials, which expand transversally when axially stretched, are widely used in flexible electronics and aerospace. However, these chiral metamaterials suffer from three severe limitations as a typical auxetic metamaterials: narrow strain range, non‐tunable mechanical behaviors, and fixed properties after fabrication. In this work, 4D printing chiral metamaterials with tunable, programmable, and reconfigurable properties are developed. The deformation mode transforms from bending dominated to stretching dominated under large deformation, leading to the stress–deformation (σ–λ) behavior of the auxetic metamaterials similar to those of the biomaterials (“ J ”‐shaped), such as tissues or organs. The programmability and reconfigurability of the developed chiral metamaterials allow mechanical behavior to change between different biomaterials with high precision. Furthermore, scaffolds with personalized mechanical properties as well as configurations and metamaterials‐based light‐emitting diode integrated devices demonstrate potential applications in tissue engineering and programmable flexible electronics.