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Publication Citation: Reduced Flammability of Polyurethane Foam Using a Carbon Nanofiber-based Multilayer Nanocoating

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Author(s): Yeon Seok Kim; Rick D. Davis; Jaime C. Grunlan; Amanda A. Cain;
Title: Reduced Flammability of Polyurethane Foam Using a Carbon Nanofiber-based Multilayer Nanocoating
Published: April 10, 2011
Abstract: For the first time, Layer-by-layer (LbL) assemblies made with carbon nanofiber (CNFs) are shown to improve the fire performance of polyurethane foam. The (359 ± 36) nm thick four bilayer coating of polyethyleneimine/CNF (cationic layer) and poly(acrylic acid) (anionic layer) contains (51 ± 1) mass fraction % CNFs. This coating completely covers the entire internal and external surfaces of the porous foam. Even though the microscopic CNF distribution was non-uniform, the macroscopic CNF network armor that was generated from this LbL process significantly reduced the flammability of the foam (55% ± 6% reduction in total heat release and peak heat release rate). This reduction is 50% better than previously reported for CNF-filled foam and 12% to 47% greater than the other most commonly used technologies for reducing foam flammability.
Citation: Polymer
Keywords: Layer-by-layer assembly; thin films; carbon nanofibers; polyurethane foam; Cone Calorimetry; flammability; soft furnishings
Research Areas: Polymers/Polymeric Composites, Nanocomposite Materials, Fire Materials Research
PDF version: PDF Document Click here to retrieve PDF version of paper (1MB)