TY - JOUR
T1 - DLP 4D-Printing of Remotely, Modularly, and Selectively Controllable Shape Memory Polymer Nanocomposites Embedding Carbon Nanotubes
AU - Cortés, Alejandro
AU - Cosola, Andrea
AU - Sangermano, Marco
AU - Campo, Mónica
AU - González Prolongo, Silvia
AU - Pirri, Candido Fabrizio
AU - Jiménez-Suárez, Alberto
AU - Chiappone, Annalisa
N1 - Publisher Copyright:
© 2021 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH
PY - 2021/12/1
Y1 - 2021/12/1
N2 - An in-depth investigation on novel electro-activated shape memory polymer composites (SMPCs) for digital light processing 3D-Printing, consisting of a poly(ethylene glycol) diacrylate/poly(hydroxyethyl methacrylate) matrix embedding multi-walled carbon nanotubes (CNTs), is reported here. The composition of the photocurable (meth)acrylate system is finely tuned to tailor the thermomechanical properties of the matrix, whereas the effect of CNTs on the photoreactivity and rheological properties of the formulations is investigated to assess the printability. Electrical measurements confirmed that the incorporation of CNT into the polymeric matrix enables the electrical conductivity and thus the possibility to remotely heat the nanocomposite using the Joule effect. The feasibility to drive a shape memory cycle via Joule heating is proved, given that the high shape fixity (Rf) and shape recovery (Rr) ratios achieved (Rf ≈ 100%, Rr > 95%) confirmed the significant electrically-triggered responsiveness of such CNT/SMPCs. Finally, it is shown how to activate a modular and selective electro-activated shape recovery, which may ultimately envisage the 4D-Printing of remotely and selectively controllable smart devices.
AB - An in-depth investigation on novel electro-activated shape memory polymer composites (SMPCs) for digital light processing 3D-Printing, consisting of a poly(ethylene glycol) diacrylate/poly(hydroxyethyl methacrylate) matrix embedding multi-walled carbon nanotubes (CNTs), is reported here. The composition of the photocurable (meth)acrylate system is finely tuned to tailor the thermomechanical properties of the matrix, whereas the effect of CNTs on the photoreactivity and rheological properties of the formulations is investigated to assess the printability. Electrical measurements confirmed that the incorporation of CNT into the polymeric matrix enables the electrical conductivity and thus the possibility to remotely heat the nanocomposite using the Joule effect. The feasibility to drive a shape memory cycle via Joule heating is proved, given that the high shape fixity (Rf) and shape recovery (Rr) ratios achieved (Rf ≈ 100%, Rr > 95%) confirmed the significant electrically-triggered responsiveness of such CNT/SMPCs. Finally, it is shown how to activate a modular and selective electro-activated shape recovery, which may ultimately envisage the 4D-Printing of remotely and selectively controllable smart devices.
KW - 4D printing
KW - carbon nanotubes
KW - digital light processing
KW - electro-activated composites, shape memory polymer
U2 - 10.1002/adfm.202106774
DO - 10.1002/adfm.202106774
M3 - Article
AN - SCOPUS:85114681237
SN - 1616-301X
VL - 31
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 50
M1 - 2106774
ER -