Multi-Material 3D Printed Shape Memory Polymer with Tunable Melting and Glass Transition Temperature Activated by Heat or Light
| Autor: | Ela Sachyani Keneth, Rama Lieberman, Matthew Rednor, Shlomo Magdassi, Giulia Scalet, Ferdinando Auricchio |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
soft robotics
Materials science Fabrication Polymers and Plastics 4D printing 02 engineering and technology finite element analysis engineering.material 010402 general chemistry Smart material actuators 01 natural sciences Diluent Article lcsh:QD241-441 chemistry.chemical_compound Coating lcsh:Organic chemistry Composite material multi-material printing Transition temperature shape memory polymers General Chemistry 3D printing 021001 nanoscience & nanotechnology 0104 chemical sciences carbon nano tubes Shape-memory polymer chemistry Polycaprolactone engineering 0210 nano-technology Glass transition |
| Zdroj: | Polymers Volume 12 Issue 3 Polymers, Vol 12, Iss 3, p 710 (2020) |
| ISSN: | 2073-4360 |
| DOI: | 10.3390/polym12030710 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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