Strong and Tough Nacre-Inspired Graphene Oxide Composite with Hierarchically Similar Structure

Autor:	Hee Min Yang, Sunghwan Jo, Jun Ho Oh, Byoung-Ho Choi, Ju Yeon Woo, Chang-Soo Han
Rok vydání:	2022
Předmět:	General Engineering General Physics and Astronomy General Materials Science
Zdroj:	ACS Nano. 16:10509-10516
ISSN:	1936-086X 1936-0851
Popis:	We report a graphene oxide (GO)-based composite, featuring GO/cross-linking agent (CA) nanoparticles, inspired by a nacre-like hierarchical structure present in nature. The as-prepared GO/CA composite was powdered to nanoscale particles and then mixed with pure GO to be GO/CA/GO (GCG) composite forming hierarchical GO/CA nanoasperities on the GO surface. The strength and toughness of the nacre-inspired GCG composite films were simultaneously improved by adjusting the nanoparticle concentration and hierarchical level of the GO-based films. Compared to pristine GO films and GO/CA composites, which exhibit a low level of hierarchy in their structures, the tensile strength and toughness of the GCG composites with higher hierarchy were enhanced 3.1 and 1.6 times and 47.6 and 10.9 times, respectively. Furthermore, a plausible mechanism of increasing mechanical properties based on nanoscale asperities and homogeneous interactions between GO and CA has been discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e99babea4d1929d2b4813fceb8512d59 https://doi.org/10.1021/acsnano.2c01667 Zobrazit plný text záznamu