Cellular PCM/graphite composites with improved thermal and electrical response
authors Vitorino, N; Abrantes, JCC; Frade, JR
nationality International
journal MATERIALS LETTERS
author keywords Cellular composites; Emulsified suspensions; Starch consolidation; Thermal conductivity; Electrical conductivity
keywords PHASE-CHANGE MATERIALS; FORM-STABLE PCM; CONDUCTIVITY ENHANCEMENT; ENERGY-STORAGE; PARAFFIN WAX; STARCH
abstract This work describes the preparation of cellular graphite/paraffin composites by a facile emulsification-based method. Graphite is readily dispersed in starch aqueous suspension and this readily emulsifies with liquid paraffin above its melting temperature. The resulting emulsion remains stable to allow selective drying of the aqueous suspension, yielding a cellular graphite network consolidated by starch and filled in situ by paraffin. Self organization of the cellular graphite skeleton was easily revealed by volatilization of paraffin. These cellular graphite/paraffin composites show remarkable enhancement of thermal conductivity, in the range 5-8 W m(-1) K-1, and electrical conductivity up to about 6S m(-1). A Taguchi plan was used to analyse the effects of stirring rate, stirring time, starch content and graphite suspension to paraffin volumetric ratio on average cellular cavity size, thermal conductivity and electrical conductivity. This analysis provides trends for further optimization. (C) 2012 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0167-577X
year published 2013
volume 92
beginning page 100
ending page 103
digital object identifier (doi) 10.1016/j.matlet.2012.10.025
web of science category Materials Science, Multidisciplinary; Physics, Applied
subject category Materials Science; Physics
unique article identifier WOS:000316033500029
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 2.687
5 year journal impact factor 2.452
category normalized journal impact factor percentile 68.173
dimensions (citation analysis):
altmetrics (social interaction):



 


Apoio

1suponsers_list_ciceco.jpg