Multi-material 3D printed shape memory polymer with tunable melting and glass transition temperature activated by heat or light

Ela Sachyani Keneth, Rama Lieberman, Matthew Rednor, Giulia Scalet, Ferdinando Auricchio, Shlomo Magdassi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

Shape memory polymers are attractive smart materials that have many practical applications and academic interest. Three-dimensional (3D) printable shape memory polymers are of great importance for the fabrication of soft robotic devices due to their ability to build complex 3D structures with desired shapes. We present a 3D printable shape memory polymer, with controlled melting and transition temperature, composed of methacrylated polycaprolactone monomers and N-Vinylcaprolactam reactive diluent. Tuning the ratio between the monomers and the diluents resulted in changes in melting and transition temperatures by 20, and 6 °C, respectively. The effect of the diluent addition on the shape memory behavior and mechanical properties was studied, showing above 85% recovery ratio, and above 90% fixity, when the concentration of the diluent was up to 40 wt %. Finally, we demonstrated multi-material printing of a 3D structure that can be activated locally, at two different temperatures, by two different stimuli; direct heating and light irradiation. The remote light activation was enabled by utilizing a coating of Carbon Nano Tubes (CNTs) as an absorbing material, onto sections of the printed objects.

Original languageAmerican English
Article number710
JournalPolymers
Volume12
Issue number3
DOIs
StatePublished - 1 Mar 2020

Bibliographical note

Publisher Copyright:
© 2020 by the authors.

Keywords

  • 3D printing
  • 4D printing
  • Actuators
  • Carbon nano tubes
  • Finite element analysis
  • Multi-material printing
  • Shape memory polymers
  • Soft robotics

Fingerprint

Dive into the research topics of 'Multi-material 3D printed shape memory polymer with tunable melting and glass transition temperature activated by heat or light'. Together they form a unique fingerprint.

Cite this