Next Article in Journal
Effect of Hydroxyapatite Formation on Titanium Surface with Bone Morphogenetic Protein-2 Loading through Electrochemical Deposition on MG-63 Cells
Next Article in Special Issue
Multifunctional, Polyurethane-Based Foam Composites Reinforced by a Fabric Structure: Preparation, Mechanical, Acoustic, and EMI Shielding Properties
Previous Article in Journal
Applications of Electrochromic Copolymers Based on Tris(4-carbazoyl-9-ylphenyl)amine and Bithiophene Derivatives in Electrochromic Devices
Previous Article in Special Issue
Polyurethane Foams: Past, Present, and Future
Open AccessArticle

Thermal Energy Storage and Mechanical Performance of Crude Glycerol Polyurethane Composite Foams Containing Phase Change Materials and Expandable Graphite

1
CICECO—Aveiro Institute of Materials, 3810-193 Aveiro, Portugal
2
Department of Chemistry of University of Aveiro, 3810-193 Aveiro, Portugal
3
RISCO, 3810-193 Aveiro, Portugal
4
Civil Engineering of University of Aveiro, 3810-193 Aveiro, Portugal
5
Escola Superior de Tecnologia e Gestão de Águeda, 3750-127 Águeda, Portugal
*
Author to whom correspondence should be addressed.
Materials 2018, 11(10), 1896; https://doi.org/10.3390/ma11101896
Received: 1 August 2018 / Revised: 22 September 2018 / Accepted: 27 September 2018 / Published: 4 October 2018
(This article belongs to the Special Issue New Trends in Polymeric Foams)
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. View Full-Text
Keywords: polyurethane foams; crude glycerol; phase change materials; expandable graphite; thermal energy storage; numerical simulations polyurethane foams; crude glycerol; phase change materials; expandable graphite; thermal energy storage; numerical simulations
Show Figures

Graphical abstract

MDPI and ACS Style

Gama, N.V.; Amaral, C.; Silva, T.; Vicente, R.; Coutinho, J.A.P.; Barros-Timmons, A.; Ferreira, A. Thermal Energy Storage and Mechanical Performance of Crude Glycerol Polyurethane Composite Foams Containing Phase Change Materials and Expandable Graphite. Materials 2018, 11, 1896.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop