Título:
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Mechanical response evaluation of microcapsules from different slurries
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Autor/a:
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Giró Paloma, Jessica; Barreneche Güerisoli, Camila; Martínez, Mònica; Sumiga, Bostjan; Fernández Renna, Ana Inés; Cabeza, Luisa F.
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Notas:
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Thermal energy storage (TES) is one method to accumulate thermal energy. In TES, latent heat storage using phase change materials (PCM) has attracted a lot of interest, recently. Phase change slurries (PCS) consist on a carrier fluid binary system composed of water as the continuous phase and microencapsulated PCM as the dispersed phase. In this paper, two PCS to be used for TES in buildings were studied: Micronal® DS 5007 X, from BASF company, and PCS28, a laboratory made sample. Both samples were characterized using particle size distribution and scanning electron microscopy, to observe the regular spherical microcapsules, the surface morphology, and the wall shell thickness of the microcapsules. Atomic force microscopy was used to analyze the force needed to break the PCS microcapsules, a critical parameter when the PCS are to be used in active pumpable systems, and also to evaluate the effective Young's modulus. Both samples were studied with the microcapsules broken and unbroken. The physicochemical and thermal properties were reported in a previous paper, and it can be concluded that both are proper candidates to be used in TES building heating and cooling applications, but the acrylic shell microcapsules present better breakage resistance to be used in active systems.
The work is partially funded by the Spanish government (ENE2011-28269-C03-02 and ENE2011-22722). The authors would like to thank the Catalan Government for the quality accreditation given to their research group GREA (2014 SGR 123) and research group DIOPMA (2014 SGR 1543). The research leading to these results has received funding from the European Union's Seventh Framework Programme (FP7/2007-2013) under grant agreement nº PIRSES-GA-2013-610692 (INNOSTORAGE). |
Materia(s):
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-Phase change slurry (PCS) -Particle size distribution (PSD) -Scanning electron microscopy (SEM) -Atomic force microscope (AFM) -Mechanical characterization |
Derechos:
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(c) Elsevier, 2015
info:eu-repo/semantics/restrictedAccess |
Tipo de documento:
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article publishedVersion |
Editor:
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Elsevier
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