Hydroxyapatite and chloroapatite derived from sardine by-products
authors Piccirillo, C; Pullar, RC; Tobaldi, DM; Castro, PML; Pintado, MME
nationality International
journal CERAMICS INTERNATIONAL
author keywords Bone implants; Bones and scales fish by-products; Calcium phosphate; Chloroapatite; Hydroxyapatite
keywords PHOSPHATE-BASED MATERIALS; NATURAL HYDROXYAPATITE; TRICALCIUM PHOSPHATE; HEAT-TREATMENT; FISH SCALES; EXTRACTION; BONES; APATITE; COMPOSITES; ADSORPTION
abstract In this paper, phosphate-based compounds used in biomedicine were extracted from bones and scales of European sardines (Sardina pilchardus); this is the first time that different parts of the same fish are used for the extraction of these kinds of materials. The bones and scales behave very differently with processing, producing different materials when annealed between 600 and 1000 degrees C. The bones formed a mixture of hydroxyapatite (Ca-10(PO4)(6)(OH)(2), HAp) and beta-tri-calcium phosphate (beta-Ca-3(PO4)(2), beta-TCP), with a higher content of beta-TCP obtained with increasing temperature. This bi-phasic material has a high added value, as it is employed as a bioceramic; in fact HAp has good biocompatibility while beta-TCP has better resorbability than HAp, despite being less biocompatible. With scales, on the other hand, either a HAp-based material or a chlorine-substitute HAp containing material (chloroapatite (Ca-10(PO4)(6)Cl-2, ClAp) were produced. HAp-based material was obtained with a simple annealing process; for ClAp, on the other hand, a combined washing-annealing process was used. ClAp is also used in biomedicine, due to its improved resorption, mechanical properties and bioactivity. This is the first time ClAp of marine origin was produced. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
publisher ELSEVIER SCI LTD
issn 0272-8842
year published 2014
volume 40
issue 8
beginning page 13231
ending page 13240
digital object identifier (doi) 10.1016/j.ceramint.2014.05.030
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000340321300079
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journal impact factor 3.83
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