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Appl. Sci. 2017, 7(7), 723; doi:10.3390/app7070723

Comparison of Microencapsulated Phase Change Materials Prepared at Laboratory Containing the Same Core and Different Shell Material

1
Departament de Ciència de Materials i Química Física, Universitat de Barcelona, C/Martí i Franquès, 1, 08028 Barcelona, Spain
2
Department of Chemistry, Gaziosmanpaşa University, 60240 Tokat, Turkey
*
Author to whom correspondence should be addressed.
Academic Editor: Luisa F. Cabeza
Received: 16 June 2017 / Revised: 6 July 2017 / Accepted: 11 July 2017 / Published: 14 July 2017
(This article belongs to the Special Issue Phase Change Material (PCM) 2017)
View Full-Text   |   Download PDF [3203 KB, uploaded 24 July 2017]   |  

Abstract

Microencapsulated Phase Change Materials (MPCM) are widely used in active and passive systems for thermal energy storage. To evaluate the strength of a proper shell/PCM system, comparisons were performed between laboratory-prepared MPCM samples produced by in situ polymerization with a phase change temperature of 50 °C and a particle size of around 1–2 μm with tetracosane as PCM, and polystyrene (PS) and poly (methyl methacrylate) (PMMA) as shells. Evaluation of mechanical performance was performed for different samples by means of Atomic Force Microscopy (AFM) at different temperatures (23 °C and 60 °C) and with different encapsulation ratios (1:3 and 1:1, shell:core) in order to compare their properties with the PCM below and above its phase change. Evaluations of the Effective Young’s modulus (E) and deformation properties were performed for both types of MPCM. For an encapsulation mass ratio of 1:3, PS has better mechanical properties because, when increasing the temperature, the E decreases less than with PMMA. In the comparison between PS/tetracosane systems with different encapsulation mass ratios (1:3 and 1:1), E values were higher for the 1:3 encapsulation mass ratio at both temperatures under study. This means that, in terms of mechanical and thermal properties, the best combination core/shell/encapsulation mass ratio is PS/tetracosane/1:3. View Full-Text
Keywords: phase change material; microencapsulated phase change material; atomic force microscopy phase change material; microencapsulated phase change material; atomic force microscopy
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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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MDPI and ACS Style

Giro-Paloma, J.; Alkan, C.; Chimenos, J.M.; Fernández, A.I. Comparison of Microencapsulated Phase Change Materials Prepared at Laboratory Containing the Same Core and Different Shell Material. Appl. Sci. 2017, 7, 723.

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