Thermal Energy Storage and Mechanical Performance of Crude Glycerol Polyurethane Composite Foams Containing Phase Change Materials and Expandable Graphite
authors Gama, NV; Amaral, C; Silva, T; Vicente, R; Coutinho, JAP; Barros-Timmons, A; Ferreira, A
nationality International
journal MATERIALS
author keywords polyurethane foams; crude glycerol; phase change materials; expandable graphite; thermal energy storage; numerical simulations
keywords FLAME-RETARDANT; POLYOL; CONDUCTIVITY; INSULATION; SURFACTANT
abstract The aim of this study was to enhance the thermal comfort properties of crude glycerol (CG) derived polyurethane foams (PUFs) using phase change materials (PCMs) (2.5-10.0% (wt/wt)) to contribute to the reduction of the use of non-renewable resources and increase energy savings. The main challenge when adding PCM to PUFs is to combine the low conductivity of PUFs whilst taking advantage of the heat released/absorbed by PCMs to achieve efficient thermal regulation. The solution considered to overcome this limitation was to use expandable graphite (EG) (0.50-1.50% (wt/wt)). The results obtained show that the use of PCMs increased the heterogeneity of the foams cellular structure and that the incorporation of PCMs and EG increased the stiffness of the ensuing composite PUFs acting as filler-reinforcing materials. However, these fillers also caused a substantial increase of the thermal conductivity and density of the ensuing foams which limited their thermal energy storage. Therefore, numerical simulations were carried using a single layer panel and the thermal and physical properties measured to evaluate the behavior of a composite PUF panel with different compositions, and guide future formulations to attain more effective results in respect to temperature buffering and temperature peak delay.
publisher MDPI
issn 1996-1944
year published 2018
volume 11
issue 10
digital object identifier (doi) 10.3390/ma11101896
web of science category Materials Science, Multidisciplinary
subject category Materials Science
unique article identifier WOS:000448658400110
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  impact metrics
journal analysis (jcr 2017):
journal impact factor 2.467
5 year journal impact factor 3.325
category normalized journal impact factor percentile 61.228
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