KIT | KIT-Bibliothek | Impressum | Datenschutz

4D Printing of Shape Memory Polymers: From Macro to Micro

Spiegel, Christoph A. 1; Hackner, Maximilian; Bothe, Viktoria P.; Spatz, Joachim P.; Blasco, Eva 1
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)

Abstract:

A novel and versatile shape memory ink system allowing 4D printing with light at the macroscale as well as the microscale is presented. Digital light processing (DLP) and direct laser writing (DLW) are selected as suitable 3D printing technologies to cover both regimes. First, a system based on monofunctional isobornyl acrylate and two crosslinkers consisting of a soft and a hard diacrylate is identified and proven to be compatible with both printing techniques. Employing DLP, a large variety of structures exhibiting distinct complexity is printed. These structures range from simple frames to more demanding 3D geometries such as double platform structures, infinity rings, or cubic grids. The shape memory effect is demonstrated for all the 3D geometries. Excellent shape fixity as well as recovery and repeatability is shown. Furthermore, the formulation is adapted for fast 4D printing at the microscale using DLW. Importantly, the 4D printed microstructures display remarkable shape memory properties. The possibility of trapping and releasing microobjects, such as microspheres, is ultimately demonstrated by designing, smart box-like 4D microstructures that can be thermally actuated—evidencing the versatility and potential of the reported system.


Verlagsausgabe §
DOI: 10.5445/IR/1000146689
Originalveröffentlichung
DOI: 10.1002/adfm.202110580
Scopus
Zitationen: 69
Web of Science
Zitationen: 68
Dimensions
Zitationen: 79
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2022
Sprache Englisch
Identifikator ISSN: 1616-301X, 1616-3028
KITopen-ID: 1000146689
HGF-Programm 43.32.02 (POF IV, LK 01) Designed Optical Materials
Erschienen in Advanced Functional Materials
Verlag Wiley-VCH Verlag
Band 32
Heft 51
Seiten Art.Nr. 2110580
Vorab online veröffentlicht am 06.02.2022
Nachgewiesen in Web of Science
Dimensions
Scopus
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page