In an effort to reduce the flammability of flexible polyurethane foam, a thin polyelectrolyte multilayer coating comprising cationic starch and montmorillonite (MMT) or vermiculite (VMT) clay was deposited through layer-by-layer (LbL) assembly. These nanocoatings were characterized with electron microscopy, direct flame exposure and cone calorimetry. All coatings are conformal and maintain the shape of the foam after exposure to an open flame. Cone calorimetry revealed that five bilayers (BLs) of starch/clay reduce the peak heat release rate of foam by 54%, while ten BL coatings reduce the total smoke release by 39 and 67% with MMT and VMT, respectively. These results demonstrate one of the most efficient and renewable nanocoatings prepared using LbL assembly for reducing the flammability of flexible polyurethane foam.
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5 January 2018
Research Article|
December 20 2017
Nanocoating of starch and clay that reduces the flammability of polyurethane foam
Chaoqun Zhang;
Chaoqun Zhang
*
Professor
College of Materials and Energy, South China Agricultural University, Guangzhou, People’s Republic of China; Department of Mechanical Engineering, Texas A&M University, College Station, TX, USA
*Corresponding author e-mail address: nwpuzcq@gmail.com; jgrunlan@tamu.edu
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Aaron Milhorn;
Aaron Milhorn
Department of Mechanical Engineering, Texas A&M University, College Station, TX, USA
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Merid Haile;
Merid Haile
Department of Materials Science and Engineering, Texas A&M University, College Station, TX, USA
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Garret Mai;
Garret Mai
Department of Mechanical Engineering, Texas A&M University, College Station, TX, USA
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Jaime C Grunlan
Jaime C Grunlan
*
Professor
Department of Mechanical Engineering, Texas A&M University, College Station, TX, USA; Department of Materials Science and Engineering, Texas A&M University, College Station, TX, USA
*Corresponding author e-mail address: nwpuzcq@gmail.com; jgrunlan@tamu.edu
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*Corresponding author e-mail address: nwpuzcq@gmail.com; jgrunlan@tamu.edu
Publisher: Emerald Publishing
Received:
August 17 2017
Accepted:
November 16 2017
Online ISSN: 2049-1239
Print ISSN: 2049-1220
ICE Publishing: All rights reserved
2018
Green Materials (2018) 5 (4): 182–186.
Article history
Received:
August 17 2017
Accepted:
November 16 2017
Citation
Zhang C, Milhorn A, Haile M, Mai G, Grunlan JC (2018), "Nanocoating of starch and clay that reduces the flammability of polyurethane foam". Green Materials, Vol. 5 No. 4 pp. 182–186, doi: https://doi.org/10.1680/jgrma.17.00025
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