Synthesis and Characterization of Jellified Composites from Bovine Bone-Derived Hydroxyapatite and Starch as Precursors for Robocasting

Florin Miculescu, Andreea Maidaniuc, Marian Miculescu*, Nicolae Dan Batalu, Robert Catalin Ciocoiu, Ştefan Ioan Voicu, George E. Stan, Vijay Kumar Thakur

*Corresponding author for this work

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Hydroxyapatite-starch composites solidify rapidly via jellification, making them suitable candidates for robocasting. However, many aspects related to hydroxyapatite powder characteristics, hydroxyapatite-starch interaction, and composites composition and properties need to be aligned with robocasting requirements to achieve a notable improvement in the functionality of printed scaffolds intended for bone regeneration. This article presents a preliminary evaluation of hydroxyapatite-starch microcomposites. Thermal analysis of the starting powders was performed for predicting composites' behavior during heat-induced densification. Also, morphology, mechanical properties, and hydroxyapatite-starch interaction were evaluated for the jellified composites and the porous bodies obtained after conventional sintering, for different starch additions, and for ceramic particle size distributions. The results indicate that starch could be used for hydroxyapatite consolidation in limited quantities, whereas the composites shall be processed under controlled temperature. Due to a different mechanical behavior induced by particle size and geometry, a wide particle size distribution of hydroxyapatite powder is recommended for further robocasting ink development.

Original languageEnglish
Pages (from-to)1338-1349
Number of pages12
JournalACS Omega
Volume3
Issue number1
Early online date31 Jan 2018
DOIs
Publication statusFirst published - 31 Jan 2018
Externally publishedYes

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    Miculescu, F., Maidaniuc, A., Miculescu, M., Dan Batalu, N., Catalin Ciocoiu, R., Voicu, Ş. I., Stan, G. E., & Thakur, V. K. (2018). Synthesis and Characterization of Jellified Composites from Bovine Bone-Derived Hydroxyapatite and Starch as Precursors for Robocasting. ACS Omega, 3(1), 1338-1349. https://doi.org/10.1021/acsomega.7b01855