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Field-structured magnetic elastomers based on thermoplastic polyurethane for fused filament fabrication

: Dohmen, Eike; Saloum, Alexander; Abel, Johannes


Philosophical Transactions of the Royal Society of London. Series A 378 (2020), No.2171, Art. 20190257, 11 pp.
ISSN: 0080-4614
ISSN: 0962-8428
ISSN: 1364-503X
ISSN: 0264-3820
ISSN: 1471-2962
Journal Article
Fraunhofer IKTS ()
FFF; Fused Filament Fabrication; AM; additive manufacturing; magnetic particles; field structuring; magnetic elastomers; smart material

The utilization of ‘smart’ materials with adaptable properties or characteristics are a widespread research issue, offering potential for tailored solutions, weight reduction or added value of products through integrated functionality. Therefore, field controlled hybrid materials such as magnetorheological (MR) elastomers or electrorheological (ER) fluids are particularly valuable and within the focus of science and research. At the same time, additive manufacturing has had a strong influence on production processes over the past decade. Today a 3D printer can be found across all disciplines in almost every company, research institution and even in many private households. The Fused Filament Fabrication (FFF) process is especially popular due to its low cost and simplicity. Within this work, a new approach for the generation of field-structured magnetic elastomers using the FFF process and a correspondingly developed prototype print head for implementation are presented and discussed. With its unique research landscape Dresden offers excellent conditions for the development of innovative processes and composite materials in the field of generative manufacture. In the ‘Dresden Concept’ network, experts from various disciplines collaborate and investigate the entire spectrum starting from biological materials, through lightweight fibre reinforced polymer composites, to high-temperature ceramics.