Abstract
Nacre, due to its layered “brick-and-mortar” nanostructure together with the nanograins grafted on its “bricks” surface, so-called nanoasperities, exhibits a superior combination of mechanical strength and toughness, and constitutes an attractive model for strengthening and toughening artificial composites. However, the existing bioinspired graphene-based composites rarely address the nano-asperity aspect. Here, we fabricated an artificial nacre consisting of bricks of graphene oxide (GO) sheets, mortars of polyamide 6,6 (PA), and nanoasperities made of detonation nanodiamond (DND) particles. The DND particles were grafted into GO sheets through either amidation or esterification reactions, then the PA polymer chains were added and interacted with the oxygen groups in both GO and DND through hydrogen bonding. The resulting ternary system with a nacre-like hierarchical structure exhibits superior mechanical properties, and has tensile strength, Young's modulus, and toughness ~1.4 times, 2.6 times, and ~4 times higher than that of the GO control film.
Original language | English |
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Article number | 109878 |
Journal | Diamond and Related Materials |
Volume | 135 |
DOIs | |
Publication status | Published - May 2023 |
Bibliographical note
Publisher Copyright:© 2023 Elsevier B.V.
Funding
This work was supported by Istanbul Technical University - Scientific Research Projects Unit (ITU-BAP) under the project number 40587 .
Funders | Funder number |
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Istanbul Teknik Üniversitesi | |
Bilimsel Araştırma Projeleri Birimi, İstanbul Teknik Üniversitesi | 40587 |
Keywords
- Graphene oxide
- Mechanical properties
- Nacre
- Nanoasperities
- Nanocomposites
- Nanodiamond