Ultra-Tough Inverse Artificial Nacre Based on Epoxy-Graphene by Freeze-Casting.
Angew Chem Int Ed Engl
; 58(23): 7636-7640, 2019 06 03.
Article
em En
| MEDLINE
| ID: mdl-30903667
ABSTRACT
Epoxy nanocomposites combining high toughness with advantageous functional properties are needed in many fields. However, fabricating high-performance homogeneous epoxy nanocomposites with traditional methods remains a great challenge. Nacre with outstanding fracture toughness presents an ideal blueprint for the development of future epoxy nanocomposites. Now, high-performance epoxy-graphene layered nanocomposites were demonstrated with ultrahigh toughness and temperature-sensing properties. These nanocomposites are composed of ca. 99â
wt % organic epoxy, which is in contrast to the composition of natural nacre (ca. 96â
wt % inorganic aragonite). These nanocomposites are named an inverse artificial nacre. The fracture toughness reaches about 4.2 times higher than that of pure epoxy. The electrical resistance is temperature-sensitive and stable under various humidity conditions. This strategy opens an avenue for fabricating high-performance epoxy nanocomposites with functional properties.
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MEDLINE
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En
Ano de publicação:
2019
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Article