TY - JOUR
T1 - Reconfigurable 4D printing via mechanically robust covalent adaptable network shape memory polymer
AU - Li, Honggeng
AU - Zhang, Biao
AU - Ye, Haitao
AU - Jian, Bingcong
AU - He, Xiangnan
AU - Cheng, Jianxiang
AU - Sun, Zechu
AU - Wang, Rong
AU - Chen, Zhe
AU - Lin, Ji
AU - Xiao, Rui
AU - Liu, Qingjiang
AU - Ge, Qi
PY - 2024/5
Y1 - 2024/5
N2 - 4D printing enables 3D printed structures to change shape over "time" in response to environmental stimulus. Because of relatively high modulus, shape memory polymers (SMPs) have been widely used for 4D printing. However, most SMPs for 4D printing are thermosets, which only have one permanent shape. Despite the efforts that implement covalent adaptable networks (CANs) into SMPs to achieve shape reconfigurability, weak thermomechanical properties of the current CAN-SMPs exclude them from practical applications. Here, we report reconfigurable 4D printing via mechanically robust CAN-SMPs (MRC-SMPs), which have high deformability at both programming and reconfiguration temperatures (>1400%), high Tg (75°C), and high room temperature modulus (1.06 GPa). The high printability for DLP high-resolution 3D printing allows MRC-SMPs to create highly complex SMP 3D structures that can be reconfigured multiple times under large deformation. The demonstrations show that the reconfigurable 4D printing allows one printed SMP structure to fulfill multiple tasks.
AB - 4D printing enables 3D printed structures to change shape over "time" in response to environmental stimulus. Because of relatively high modulus, shape memory polymers (SMPs) have been widely used for 4D printing. However, most SMPs for 4D printing are thermosets, which only have one permanent shape. Despite the efforts that implement covalent adaptable networks (CANs) into SMPs to achieve shape reconfigurability, weak thermomechanical properties of the current CAN-SMPs exclude them from practical applications. Here, we report reconfigurable 4D printing via mechanically robust CAN-SMPs (MRC-SMPs), which have high deformability at both programming and reconfiguration temperatures (>1400%), high Tg (75°C), and high room temperature modulus (1.06 GPa). The high printability for DLP high-resolution 3D printing allows MRC-SMPs to create highly complex SMP 3D structures that can be reconfigured multiple times under large deformation. The demonstrations show that the reconfigurable 4D printing allows one printed SMP structure to fulfill multiple tasks.
UR - http://www.scopus.com/inward/record.url?scp=85193384920&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85193384920&origin=recordpage
U2 - 10.1126/sciadv.adl4387
DO - 10.1126/sciadv.adl4387
M3 - RGC 21 - Publication in refereed journal
C2 - 38748786
SN - 2375-2548
VL - 10
JO - Science Advances
JF - Science Advances
IS - 20
M1 - eadl4387
ER -
