DLP 4D‐Printing of Remotely, Modularly, and Selectively Controllable Shape Memory Polymer Nanocomposites Embedding Carbon Nanotubes | Zendy

Cortés Alejandro | Zendy; Cosola Andrea | Zendy; Sangermano Marco | Zendy; Campo Mónica | Zendy; González Prolongo Silvia | Zendy; Pirri Candido Fabrizio | Zendy; JiménezSuárez Alberto | Zendy; Chiappone Annalisa | Zendy

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DLP 4D‐Printing of Remotely, Modularly, and Selectively Controllable Shape Memory Polymer Nanocomposites Embedding Carbon Nanotubes

Author(s) -

Cortés Alejandro,

Cosola Andrea,

Sangermano Marco,

Campo Mónica,

González Prolongo Silvia,

Pirri Candido Fabrizio,

JiménezSuárez Alberto,

Chiappone Annalisa

Publication year - 2021

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.202106774

Subject(s) - materials science , carbon nanotube , nanocomposite , joule heating , shape memory polymer , methacrylate , polymer , ethylene glycol , acrylate , composite material , nanotechnology , chemical engineering , copolymer , engineering

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 ( R f ) and shape recovery ( R r ) ratios achieved ( R f ≈ 100%, R r > 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.

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