In Situ Crystallization of Hydroxyapatite on Carboxymethyl Cellulose as a Biomimetic Approach to Biomass-Derived Composite Materials.

Content Provider	Europe PMC
Author	Okuda, Kohei Shigemasa, Ryosuke Hirota, Ken Mizutani, Tadashi
Copyright Year	2022
Abstract	Nanohydroxyapatite(HAP) was crystallized in an aqueous solutionof carboxymethyl cellulose (CMC) to prepare the composites of CMCand HAP with a stable interface between them with the aim of developinga sustainable tough biomass composite material inspired by bone. Thetemperature (room temperature to 90 °C) and the concentrationof CMC (0.83–13.2 g/L) were optimized for the mechanical propertiesof the composites. The composite containing 67 wt % HAP prepared at50 °C in the presence of 9.9 g/L CMC exhibited the largest flexuralstrength of 113 ± 2 MPa and the elastic modulus of 7.7 ±0.3 GPa. X-ray diffraction showed that nanometer-sized HAP crystalswere formed with a large aspect ratio, and energy-dispersive X-rayspectroscopy and infrared spectroscopy revealed that CMC was boundto the surface of HAP through an ionic interaction between Ca2+ and COO–. Since the composite has a higherflexural strength than polyamide 6 (92 MPa) and a higher elastic modulusthan polyamide 6 with 40 wt % glass fiber (5.5 GPa), it can be usedas new tough biomass composite material to replace petroleum-derivedengineering plastics.
Journal	ACS Omega
Volume Number	7
PubMed Central reference number	PMC9016835
Issue Number	14
PubMed reference number	35449963
e-ISSN	24701343
DOI	10.1021/acsomega.2c00423
Language	English
Publisher	American Chemical Society
Publisher Date	2022-04-01
Access Restriction	Open
Rights License	Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). © 2022 The Authors. Published by American Chemical Society
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering