Strong and super tough: Layered ceramic-polymer composites with bio-inspired morphology
Veröffentlichungsdatum
2018
Zusammenfassung
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.
Schlagwörter
cationically curing epoxy resins
;
composites
;
layered ceramics
;
mechanical properties
;
Strength
;
toughness
Verlag
Wiley
Institution
Dokumenttyp
Wissenschaftlicher Artikel
Zeitschrift/Sammelwerk
Startseite
1
Endseite
11
Zweitveröffentlichung
Ja
Dokumentversion
Postprint
Lizenz
Alle Rechte vorbehalten
Sprache
Englisch
Dateien![Vorschaubild]()
Lade...
Name
Rezwan_Pogorelov_et_al-strong-and-supertough_2018.pdf
Size
890,99 KB
Format
Adobe PDF
Checksum
(MD5):7a0cb569153532cac2d52c9c4cb7f634