Development of layer-by-layer assembled carbon nanofiber-filled coatings to reduce polyurethane foam flammability

作者：Kim Yeon Seok; Davis Rick^*; Cain Amanda A; Grunlan Jaime C

来源：Polymer, 2011, 52(13): 2847-2855.

DOI：10.1016/j.polymer.2011.04.023

• Layer-by-layer assembly
• Carbon nanofibers
• Flammability

Layer-by-layer (LbL) assemblies made with carbon nanofibers (CNFs) are shown to reduce the flammability 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 % CNF. 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 (e.g., 40% +/- 3% reduction in peak heat release rate). Normalized by flame retardant concentration, the reduction in foam peak heat release due to these CNF coatings is 38% larger than CNF embedded in the foam and as high as 1138% greater than other commercial technologies used to reduce foam flammability. Published by Elsevier Ltd.

• 出版日期2011-6-8