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The Scientific World Journal
Volume 2014 (2014), Article ID 379582, 5 pages
http://dx.doi.org/10.1155/2014/379582
Research Article

Facile Preparation of Carbon Microcapsules Containing Phase-Change Material with Enhanced Thermal Properties

1Department of Mechanical Engineering, Advanced Material Research Center, University of Malaya, 50603 Kuala Lumpur, Malaysia
2Department of Mechanical Engineering, Universiti Tenaga Nasional, 43009 Kajang, Selangor, Malaysia

Received 14 February 2014; Accepted 11 June 2014; Published 26 June 2014

Academic Editor: Juan C. Gómez-Fernández

Copyright © 2014 Sara Tahan Latibari et al. 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.

Abstract

This study describes the hydrothermal synthesis of a novel carbon/palmitic acid (PA) microencapsulated phase change material (MEPCM). The field emission scanning electron microscopy (FESEM) and high resolution transmission electron microscopy (HRTEM) images confirm that spherical capsules of uniform size were formed with a mean diameter of 6.42 μm. The melting and freezing temperature were found to be slightly lower than those of pure PA with little undercooling. The composite retained 75% of the latent heat of pure PA. Thermal stability of the MEPCM was found to be better than that of pure PA. The thermal conductivity of MEPCM was increased by as much as 41% at 30°C. Due to its good thermal properties and chemical and mechanical stability, the carbon/PA MEPCM displays a good potential for thermal energy storage systems.