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4D printing of shape memory polymers: from macro to micro

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 mono...

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Bibliographic Details
Main Authors: Spiegel, Christoph A. (Author) , Hackner, Maximilian (Author) , Bothe, Viktoria P. (Author) , Spatz, Joachim P. (Author) , Blasco, Eva (Author)
Format: Article (Journal)
Language:English
Published: December 16, 2022
In: Advanced functional materials
Year: 2022, Volume: 32, Issue: 51, Pages: 1-11
ISSN:1616-3028
DOI:10.1002/adfm.202110580
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1002/adfm.202110580
Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.202110580
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Author Notes:Christoph A. Spiegel, Maximilian Hackner, Viktoria P. Bothe, Joachim P. Spatz, and Eva Blasco
Description
Summary: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.
Item Description:Online veröffentlicht: 6. Februar 2022
Gesehen am 13.03.2025
Physical Description:Online Resource
ISSN:1616-3028
DOI:10.1002/adfm.202110580

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