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|Author(s):||Yeon S. 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.|
|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:||Click here to retrieve PDF version of paper (1MB)|