Nacre-like graphene oxide nanocomposite with nanodiamonds as nanoasperities

Zineb Benzait*, Levent Trabzon

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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 languageEnglish
Article number109878
JournalDiamond and Related Materials
Volume135
DOIs
Publication statusPublished - 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 .

FundersFunder number
Istanbul Teknik Üniversitesi
Bilimsel Araştırma Projeleri Birimi, İstanbul Teknik Üniversitesi40587

    Keywords

    • Graphene oxide
    • Mechanical properties
    • Nacre
    • Nanoasperities
    • Nanocomposites
    • Nanodiamond

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