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research
Precipitation of hydroxyapatite at 37 °C in a meso oscillatory flow reactor operated in batch at constant power density
Authors
Bernard
Brown
+38 more
Brown
Brown
Cabaret
Castro
Chew
Elliot
Ferreira
Fitch
Florea
Gomez-Morales
Johannsen
Jones
Koutsopoulos
Kumta
Kuznetsov
Lee
Lopes
Lynn
Mackley
Neira
Nelson
Ni
Ni
Ni
Osaka
Panda
Reis
Reis
Rezk
Ristic
Shekunov
Siddharthan
Simon
Simon
Wang
Wang
Zhou
Zhuang
Publication date
1 December 2013
Publisher
'Wiley'
Doi
Cite
Abstract
A meso oscillatory flow reactor (OFR) was successfully applied for the precipitation of hydroxyapatite (HAp) nanoparticles. Mixing efficiency of the mesoreactor operated batchwise in a vertical tube was evaluated at constant power density, by monitoring variation of hue values upon mixing both spatially and temporally. The best operating conditions for fast mixing and a more homogeneous reaction medium were verified for f = 0.83 Hz and x0 = 4.5 mm. HAp precipitation was then carried out under these conditions at 37 °C for different mixing Ca/P molar ratios. HAp nanoparticles with a mean size (d50) of about 67 nm and a narrow size distribution were obtained. Furthermore, the obtained results show the advantages of the meso-OFR over a stirred tank batch reactor due to the production, about four times faster, of smaller and more uniform HAp nanoparticles. © 2013 American Institute of Chemical Engineers AIChE J, 2013This work was supported by the Portuguese Foundation for Science and Technology (SFRH/BD/42992/2008) through the MIT-Portugal Program, Bioengineering Systems Focus Area. The authors are thankful to Dr Jorge Ferreira from LNEG (Laboratorio Nacional de Energia e Geologia, Portugal) for carrying out the X-ray measurements and his help with the interpretation of results
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info:doi/10.1002%2Faic.14193
Last time updated on 25/04/2021
Universidade do Minho: RepositoriUM
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oai:repositorium.sdum.uminho.p...
Last time updated on 12/11/2016