Open Access
ARTICLE
Preparation and Characterization of Sandwich Structured Materials with Interesting Insulation and Fire Resistance
Haizhu Wu1,#, Jinxing Li1,#, Shouhu Bao1, Fuxian Yang1, Jun Zhang1, Hisham Essawy2,*, Guanben Du1, Xiaojian Zhou1,*
1
Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming,
650224, China
2
Department of Polymers and Pigments, National Research Centre, Cairo, 12622, Egypt
* Corresponding Authors: Hisham Essawy. Email: ; Xiaojian Zhou. Email:
# Haizhu Wu and Jinxin Li contributed equally to this work
Journal of Renewable Materials 2022, 10(8), 2029-2039. https://doi.org/10.32604/jrm.2022.019834
Received 19 October 2021; Accepted 16 November 2021; Issue published 25 April 2022
Abstract
A cellular material in the form of 3-layered sandwich structure material was prepared via sole use of mechanical
stirring without any use of a foaming agent, while Tween-80 was employed as a foam stabilizer via a developed
in-situ mold casting. The resulting structure displayed a good appearance with no visual defects. The 3-layered
composition of the sandwish structure, “nonporous resin layer-porous foam layer-nonporous resin layer”, was
examined in terms of the microstructure, density & density distribution, pulverization ratio, mechanical strength,
insulation and flame retardant performance. It was indicated from the results that the bonding between the resin
layer and foam layer was tight, while the tensile rupture always occurred in the porous layer. Also, the density of
the sandwich structure material was symmetrical with “saddle” distribution, and a uniform density for any given
layer. The increase in the density at the interface layer provided a good interpretation for the tensile rupture never
occurred at the interface. The brittleness resistance of the developed material was significantly improved, and the
pulverization ratio was sharply decreased from 9.93% to 0.31%. The material acquired a thermal conductivity and
limiting oxygen index (LOI) of 0.0241 W/m ⋅ K and 29.92%, respectively, indicating potential use of such materials broadly in fields of insulation and flame retardancy.
Graphical Abstract
Keywords
Cite This Article
APA Style
Wu, H., Li, J., Bao, S., Yang, F., Zhang, J. et al. (2022). Preparation and characterization of sandwich structured materials with interesting insulation and fire resistance. Journal of Renewable Materials, 10(8), 2029-2039. https://doi.org/10.32604/jrm.2022.019834
Vancouver Style
Wu H, Li J, Bao S, Yang F, Zhang J, Essawy H, et al. Preparation and characterization of sandwich structured materials with interesting insulation and fire resistance. J Renew Mater. 2022;10(8):2029-2039 https://doi.org/10.32604/jrm.2022.019834
IEEE Style
H. Wu et al., "Preparation and Characterization of Sandwich Structured Materials with Interesting Insulation and Fire Resistance," J. Renew. Mater., vol. 10, no. 8, pp. 2029-2039. 2022. https://doi.org/10.32604/jrm.2022.019834