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4D-Printed Resins and Nanocomposites Thermally Stimulated by Conventional Heating and IR Radiation

  • A. Cortés
  • , Jose L. Aguilar
  • , A. Cosola
  • , Xoan Xosé Fernández Sanchez-Romate
  • , A. Jiménez-Suárez
  • , M. Sangermano
  • , M. Campo
  • , Silvia G. Prolongo
  • Universidad Rey Juan Carlos
  • Politecnico di Torino

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The shape memory (SM) capabilities of nanocomposites based on two photocurable acrylated/methacrylated resins, doped with carbon nanotubes (CNTs), and manufactured by digital light processing 3D printing were investigated. The mechanical properties and glass transition temperature (Tg) can be tailored in a broad range by varying the weight ratio of the two resins (Tg ranging from 15 to 190 °C; Young's modulus from 1.5 to 2500 MPa). Shape fixity (SF) and recovery (SR) ratios are strongly influenced by the temperature being significantly higher at temperatures close to the Tg. The results confirm that the SF strongly depends on the stiffness of chain segments between cross-linking points, whereas the SR mainly depends on the cross-link density of the network. CNT addition barely affects the SF and SR in the conventional oven, whereas the recovery speed using IR heating is significantly increased for the doped nanocomposites due to their higher IR absorbance.

Original languageEnglish
Pages (from-to)5207-5215
Number of pages9
JournalACS Applied Polymer Materials
Volume3
Issue number10
DOIs
Publication statusPublished - 8 Oct 2021
Externally publishedYes

Keywords

  • 4D printing
  • additive manufacturing
  • carbon nanotubes
  • nanocomposites
  • shape memory

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