Development of chemically synthesized hydroxyapatite composite with reduced graphene oxide for enhanced mechanical properties

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2023-06
Major/Subject
Mcode
Degree programme
Language
en
Pages
10
1-10
Series
Journal of the Mechanical Behavior of Biomedical Materials, Volume 142
Abstract
A successful attempt has been made to improve the mechanical properties of Hydroxyapatite (HAp) and reduced graphene oxide (rGO) composite nanoparticles (NPs). Various proportions of HAp and rGO were synthesized to improve the mechanical properties. HAp NPs were prepared using the wet precipitation method and further calcined to form crystalline particles. The physicochemical characterization of the HAp NPs revealed that the crystalline size and percentage of crystallinity were calculated to be 42.49 ± 1.2 nm and 44% post calcination. Furthermore, the rGO-HA composites were prepared using ball milling and obtained in the shape of pellets with different ratios of rGO (10, 20, 30, 40, 50% wt.). The mechanical properties have been evaluated through a Universal testing machine. Compared to calcined HAp (cHAp), the strength of variants significantly enhanced with the increased concentration of rGO. The compressive strength of HA-rGO with the ratio of the concentration of 60:40% by weight is a maximum of about 10.39 ± 0.43 MPa. However, the porosity has also been bolstered by increasing the concentration of rGO, which has been evaluated through the liquid displacement method. The mean surface roughness of the composites has also been evaluated from the images through Image J (an image analysis program).
Description
Publisher Copyright: © 2023 The Authors
Keywords
Calcination, Hydroxyapatite, Mechanical strength, Reduced graphene oxide, Surface roughness
Other note
Citation
Flora, B, Kumar, R, Tiwari, P, Kumar, A, Ruokolainen, J, Narasimhan, A K, Kesari, K K, Gupta, P K & Singh, A 2023, ' Development of chemically synthesized hydroxyapatite composite with reduced graphene oxide for enhanced mechanical properties ', Journal of the Mechanical Behavior of Biomedical Materials, vol. 142, 105845, pp. 1-10 . https://doi.org/10.1016/j.jmbbm.2023.105845