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4D Fabrication of Two-Way Shape Memory Polymeric Composites by Electrospinning and Melt Electrowriting

Title data

Pasini, Chiara ; Vohr Soreño, Zhander ; Schönfeld, Dennis ; Pretsch, Thorsten ; Constante Ibarra, Gissela Katherine ; Sadilov, Ilia ; Ionov, Leonid:
4D Fabrication of Two-Way Shape Memory Polymeric Composites by Electrospinning and Melt Electrowriting.
In: Macromolecular Rapid Communications. Vol. 45 (2024) Issue 11 . - 2400010.
ISSN 1521-3927

Official URL: Volltext

Project information

Project financing: Deutsche Forschungsgemeinschaft
IO 68/10-1 IO 68/11-1 IO 68/16-1
Europan Regional Development Fund: project 85007031
Fraunhofer Exccellence Cluster "Programmable Materials": grants numer PSP elements 40-04068-2500-00007 and 40-03420-2500-00003

Abstract in another language

This work presents a new method for 4D fabrication of two-way shape memory materials that are capable of reversible shapeshifting right after manufacturing, upon application of proper heating and cooling cycles. The innovative solution here presented consists in the combination of highly stretched electrospun shape memory polymer (SMP) nanofibers with a melt electrowritten elastomer. More specifically, the stretched nanofibers are made of a biocompatible thermoplastic polyurethane (TPU) with crystallizable soft segments, undergoing melt-induced contraction and crystallization-induced elongation upon heating and cooling, respectively. Reversible actuation during crystallization becomes possible due to the elastic recovery of the elastomer component, obtained by melt electrowriting of a commercial TPU filament. Thanks to the design freedom offered by additive manufacturing, the elastomer structure has also the role of guiding the shape transformation. Electrospinning and melt electrowriting process parameters are setup so to obtain smart 4D objects capable of two-way shape memory effect (SME), and the possibility of reversible and repeatable actuation is demonstrated. The two components are then combined in different proportions with the aim of tailoring the two-way SME, taking into account the effect of design parameters such as the SMP content, the elastomer pattern, and the composite thickness.

Further data

Item Type: Article in a journal
Refereed: No
Keywords: shape morphing; reversible shape memory effect; polyester urethane; electrospinning; melt electrowriting
Institutions of the University: Faculties > Faculty of Engineering Science > Professor Biofabrication > Professor Biofabrication - Univ.-Prof. Dr. Leonid Ionov
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Professor Biofabrication
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 600 Technology
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 12 Mar 2024 09:37
Last Modified: 27 Jun 2024 10:51