Graphene–calcium carbonate coating to improve the degradation resistance and mechanical integrity of a biodegradable implant

Lokesh Choudhary; Parama Chakraborty Banerjee; R.K. Singh Raman; Derrek E. Lobo; Christopher D. Easton; Mainak Majumder; Frank Witte; Jörg F. Löffler

Journal of Magnesium and Alloys (Jan 2024)

Graphene–calcium carbonate coating to improve the degradation resistance and mechanical integrity of a biodegradable implant

Lokesh Choudhary,
Parama Chakraborty Banerjee,
R.K. Singh Raman,
Derrek E. Lobo,
Christopher D. Easton,
Mainak Majumder,
Frank Witte,
Jörg F. Löffler

Affiliations

Lokesh Choudhary: Department of Mechanical and Aerospace Engineering, Monash University, Clayton Campus, Melbourne, VIC 3800, Australia
Parama Chakraborty Banerjee: Department of Chemical and Biological Engineering, Monash University, Clayton Campus, Melbourne, VIC 3800, Australia; Corresponding authors.
R.K. Singh Raman: Department of Mechanical and Aerospace Engineering, Monash University, Clayton Campus, Melbourne, VIC 3800, Australia; Department of Chemical and Biological Engineering, Monash University, Clayton Campus, Melbourne, VIC 3800, Australia; Corresponding authors.
Derrek E. Lobo: Department of Mechanical and Aerospace Engineering, Monash University, Clayton Campus, Melbourne, VIC 3800, Australia; Nanoscale Science and Engineering Laboratory (NSEL), Bldg 37, Monash University, Clayton Campus, Melbourne, VIC 3800, Australia
Christopher D. Easton: CSIRO Materials Science and Engineering, Bayview Avenue, Clayton, VIC 3168, Australia
Mainak Majumder: Department of Mechanical and Aerospace Engineering, Monash University, Clayton Campus, Melbourne, VIC 3800, Australia; Nanoscale Science and Engineering Laboratory (NSEL), Bldg 37, Monash University, Clayton Campus, Melbourne, VIC 3800, Australia
Frank Witte: Julius Wolff Institute and Berlin Brandenburg Center for Regenerative Therapies, Charité – Universitätsmedizin Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
Jörg F. Löffler: Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland

Journal volume & issue: Vol. 12, no. 1
pp. 394 – 404

Abstract

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Biodegradable implants are critical for regenerative orthopaedic procedures, but they may suffer from too fast corrosion in human-body environment. This necessitates the synthesis of a suitable coating that may improve the corrosion resistance of these implants without compromising their mechanical integrity. In this study, an AZ91 magnesium alloy, as a representative for a biodegradable Mg implant material, was modified with a thin reduced graphene oxide (RGO)-calcium carbonate (CaCO3) composite coating. Detailed analytical and in-vitro electrochemical characterization reveals that this coating significantly improves the corrosion resistance and mechanical integrity, and thus has the potential to greatly extend the related application field.

Published in Journal of Magnesium and Alloys

ISSN: 2213-9567 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.keaipublishing.com/en/journals/journal-of-magnesium-and-alloys/

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