Fabrication of highly filled composites with an innovative miniaturized spouted bed

Journal
Processes  
Volume
8
Issue
5
Article Number
521
Citation
Processes 8 (5): 521 (2020)
Publisher DOI
10.3390/pr8050521
Scopus ID
2-s2.0-85085552419
Publisher
Multidisciplinary Digital Publishing Institute
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.
Subjects
miniaturized spouted bed
particle coating
highly filled composites
three-point bendingtest
mechanical properties of composites
DDC Class
540: Chemie
620: Ingenieurwissenschaften
Lizenz
https://creativecommons.org/licenses/by/4.0/
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