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Citation link: https://doi.org/10.26092/elib/2235

Publisher DOI: https://doi.org/10.1111/jace.15717
Rezwan_Pogorelov_et_al-strong-and-supertough_2018.pdf
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Strong and super tough: Layered ceramic-polymer composites with bio-inspired morphology


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Authors: Pogorelov, Evgeny 
Tushtev, Kamen  
Arnebold, André 
Koschek, Katharina  
Hartwig, Andreas  
Rezwan, Kurosch  
Abstract: 
Bio-inspired layered ceramic-polymer composites with high strength and toughness were prepared from sintered aluminum oxide ceramic sheets and cationically curing epoxy resins toughened with poly(ε-caprolactone) (PCL). The architecture of the composite is inspired by nacre but is arranged on a larger scale. Ceramic sheets with a nominal thickness of 250 μm were assembled into composite plates by adhesive layers with a nominal thickness of 20 μm. Before the manufacturing of the composites, the stress-strain properties of the polymer component were tailored by the variation in the PCL content between 0 and 39 wt%. For composites with 4 and 15 ceramic layers, the bending strengths achieved 327 MPa and 376 MPa, which are higher than that of pure ceramic sheets. Moreover, composites with 15 ceramic layers show a 16 times higher toughness compared to that of the pure ceramic sheets. The results indicate that the toughness of the layered composites increases significantly with the number of layers. Inspired by the geometrical ratio of the natural sheet composite nacre, we have achieved a similar strength but a 2 times higher toughness than nacre by only adding up to 6 vol% of the polymer.
Keywords: cationically curing epoxy resins; composites; layered ceramics; mechanical properties; Strength; toughness
Issue Date: 2018
Publisher: Wiley
Journal/Edited collection: Journal of the American Ceramic Society 
Start page: 1
End page: 11
Type: Artikel/Aufsatz
ISSN: 1551-2916
Secondary publication: yes
DOI: 10.26092/elib/2235
URN: urn:nbn:de:gbv:46-elib69147
Institution: Universität Bremen 
Faculty: Fachbereich 02: Biologie/Chemie (FB 02) 
Zentrale Wissenschaftliche Einrichtungen und Kooperationen 
Institute: MAPEX Center for Materials and Processes 
Appears in Collections:Forschungsdokumente

  

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