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Materials 2016, 9(1), 24; doi:10.3390/ma9010024

Preparation and Characterization of Inorganic PCM Microcapsules by Fluidized Bed Method

1,2,†,* , 1,†
,
3,†
and
1,2,†
1
Department of Chemical Engineering and Mineral Processing and Center for Advanced Study of Lithium and Industrial Minerals (CELiMIN), University of Antofagasta, Av. Universidad de Antofagasta 02800, Campus Coloso, Antofagasta 127300, Chile
2
Solar Energy Research Center (SERC-Chile), Av Tupper 2007, Piso 4, Santiago 8370451, Chile
3
GREA Innovació Concurrent, Edifici CREA, Universitat de Lleida, Pere de Cabrera s/n, Lleida 25001, Spain
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: A. Inés Fernández
Received: 7 October 2015 / Revised: 20 November 2015 / Accepted: 25 November 2015 / Published: 4 January 2016
View Full-Text   |   Download PDF [2523 KB, uploaded 4 January 2016]   |  

Abstract

The literature shows that inorganic phase change materials (PCM) have been very seldom microencapsulated, so this study aims to contribute to filling this research gap. Bischofite, a by-product from the non-metallic industry identified as having good potential to be used as inorganic PCM, was microencapsulated by means of a fluidized bed method with acrylic as polymer and chloroform as solvent, after compatibility studies of both several solvents and several polymers. The formation of bischofite and pure MgCl2·6H2O microcapsules was investigated and analyzed. Results showed an efficiency in microencapsulation of 95% could be achieved when using 2 min of fluidization time and 2 kg/h of atomization flow. The final microcapsules had excellent melting temperatures and enthalpy compared to the original PCM, 104.6 °C and 95 J/g for bischofite, and 95.3 and 118.3 for MgCl2·6H2O. View Full-Text
Keywords: phase change material; inorganic; microencapsulation; fluidization; bischofite; MgCl2·6H2O phase change material; inorganic; microencapsulation; fluidization; bischofite; MgCl2·6H2O
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Ushak, S.; Cruz, M.J.; Cabeza, L.F.; Grágeda, M. Preparation and Characterization of Inorganic PCM Microcapsules by Fluidized Bed Method. Materials 2016, 9, 24.

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