Reprocessed magnetorheological elastomers with reduced carbon footprint and their piezoresistive properties

Despite the vast amount of studies based on magnetorheological elastomers (MREs), a very limited number of investigations have been initiated on their reprocessing. This paper presents a new type of recyclable MRE which is composed of thermoplastic polyurethane (TPU) and carbonyl iron particles (CI)...

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Bibliographic Details
Published in:Scientific reports 2022-07, Vol.12 (1), p.12041-12041, Article 12041
Main Authors: Munteanu, A., Ronzova, A., Kutalkova, E., Drohsler, P., Moucka, R., Kracalik, M., Bilek, O., Mazlan, S. A., Sedlacik, M.
Format: Article
Language:English
Subjects:
639/166
639/301
Carbon footprint
Carbonyl compounds
Competition
Elastomers
Humanities and Social Sciences
Injection
Investigations
Iron
Mechanical properties
Molecular weight
multidisciplinary
Polymers
Polyurethane
Recycled materials
Recycling
Science
Science (multidisciplinary)
Spectrum analysis
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Summary:Despite the vast amount of studies based on magnetorheological elastomers (MREs), a very limited number of investigations have been initiated on their reprocessing. This paper presents a new type of recyclable MRE which is composed of thermoplastic polyurethane (TPU) and carbonyl iron particles (CI). The chosen TPU can be processed using injection moulding (IM), followed by several reprocessing cycles while preserving its properties. Numerous types of injection moulded and reprocessed MREs have been prepared for various particle concentrations. The effect of thermo-mechanical degradation on the recycled MREs has been investigated while simulating the reprocessing procedure. An apparent decrease in molecular weight was observed for all the examined matrices during the reprocessing cycles. These changes are attributed to the intermolecular bonding between the hydroxyl groups on the surface of the CI particles and the matrix which is studied in depth. The effect of reprocessing and the presence of magnetic particles is evaluated via tensile test, magnetorheology and piezoresistivity. These characterization techniques prove that the properties of our MREs are preserved at an acceptable level despite using 100% of recyclates while in real applications only up to 30% of recycled material is generally used.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-022-16129-y