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Open AccessFeature PaperArticle

Fabrication of Highly Filled Composites with an Innovative Miniaturized Spouted Bed

1
Institute of Solids Process Engineering and Particle Technology, Hamburg University of Technology, Denickestraße 15, 21073 Hamburg, Germany
2
Institute of Advanced Ceramics, Hamburg University of Technology, Denickestraße 15, 21073 Hamburg, Germany
*
Author to whom correspondence should be addressed.
Processes 2020, 8(5), 521; https://doi.org/10.3390/pr8050521
Received: 6 April 2020 / Revised: 23 April 2020 / Accepted: 24 April 2020 / Published: 28 April 2020
In nature bio-composites such as nacre show remarkable mechanical properties due to their complex hierarchical structure and high-volume fraction of its hard component. These composites are highly interesting for structural applications in different branches of industries for mechanical engineering and process technology. The aim of this work was to provide a scalable method for the production of highly filled composites by mimicking the structure of bio-composites. Therefore, composites from iron oxide (Fe2O3) and SBC-polymer (styrene-butadiene block copolymer) were fabricated by using a miniaturized spouted bed with an innovative fluidization gap design. Small iron oxide particles (25–45 μm) were fluidized in the spouted bed and coated with a polymer solution via a bottom spray nozzle. Afterwards the coated granules were hot-pressed and the mechanical properties of the obtained composites were tested. By this method composites with a bending strength of up to 6 MPa were fabricated. Although the mechanical properties of these artificial composites are still lower than those of the natural role models, it was shown that the spouted bed is a suitable technique for the fabrication of highly filled composites. For further optimization of the mechanical properties more complex and tailor-made starting materials will be used in following studies. View Full-Text
Keywords: miniaturized spouted bed; particle coating; highly filled composites; three-point bending test; mechanical properties of composites miniaturized spouted bed; particle coating; highly filled composites; three-point bending test; mechanical properties of composites
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MDPI and ACS Style

Rothberg, H.S.; Pietsch, S.; Schneider, G.A.; Heinrich, S. Fabrication of Highly Filled Composites with an Innovative Miniaturized Spouted Bed. Processes 2020, 8, 521.

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