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Self-assembling structure formation in low-density magnetoactive polymers

  • The formation of microstructures in magnetoactive polymers (MAPs) is a recently discovered phenomenon found only with very low filler particle concentrations (less than 3 wt %). Due to the degassing process, filler particles collect around an ascending bubble, which dissolves at a certain point leaving particulate rings within the matrix. The formation of toroidal microstructures commences as filler concentration approaches 1 wt %. The development of coherent parallel aligned rings with a compact order continues as particle concentrations increase toward 2 wt %. Between 2 and 3 wt % capillary doublets develop, while mass percentages higher than 3% result in increasing entropy as the random order of particle agglomeration found in higher concentration MAP dominates. Self-structured samples of different filler material and concentrations between 1 and 3 wt % have been investigated using X-ray tomography, where the emerging structures can be observed and visualized. The ring structures resulting from this research represent microinductivities which can be fabricated in a targeted manner, thus enabling new applications in the high-frequency radio field. Furthermore, these anisotropic, but well-organized, structures have magnetic field-dependent implications for optical, thermal, acoustic, and medical applications.

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Metadaten
Author:Dirk SindersbergerORCiD, Nina PremORCiD, Gareth J. MonkmanORCiDGND
DOI:https://doi.org/10.1002/app.48291
Parent Title (English):Journal of Applied Polymer Science
Publisher:Wiley
Document Type:Article
Language:English
Year of first Publication:2019
Release Date:2022/01/31
Tag:ELASTOMERS; PERMEABILITY; Particle; VISCOELASTIC PROPERTIES; X-ray; composites; magnetism and magnetic properties; self-assembly; sensors and actuators
Volume:137
Issue:3
Article Number:48291
Institutes:Fakultät Elektro- und Informationstechnik
Fakultät Elektro- und Informationstechnik / Mechatronics Research Unit (MRU)
Begutachtungsstatus:peer-reviewed
research focus:Energie und Mobilität
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG
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