A novel and effective method to fabricate flame retardant and smoke suppressed flexible polyurethane foam

Abstract

In the present work, chitosan and magnesium hydroxide (MH) were successfully deposited on the surface of flexible polyurethane foam (FPUF). Due to the strong interaction, the coated foam with 10.3 wt% weightgain could be prepared by constructing one chitosan layer and one MH layer. Scanning electron microscopy images showed that this coating continuously covered the substrate. The combustion properties of FPUF were investigated by cone calorimeter and smoke density tests, and the gases released during the thermal degradation process were monitored by thermal gravimetric-Fourier transform infrared spectrometry. It was found that the FPUF with a chitosan/MH coating kept its shape and released less black smoke after being exposed to a butane flame for 10 s, while the pure foam was consumed completely. The cone calorimeter test data indicated that a reduction in the peak heat release rate of the foam with 10.3 wt% weight-gain achieved 52.6% relative to pure foam. Remarkably, the smoke density test results showed that the coating can significantly suppress the smoke production of FPUF. Moreover, the evolved gas products of FPUF during the thermal decomposition were effectively decreased after being covered with the hybrid coating.

Epoxy‐based multilayers for flame resistant flexible polyurethane foam (FPUF)

“…The increase in the number of trilayers has resulted in better thermal stability with increased char residue as given in Table S1 (a,b) (Supporting Information). The number of trilayers has a direct influence upon the % mass gain and ultimately delay the rapid thermal decomposition of FPUF . Ultrathin multilayers have significantly delayed the second stage degradation by 16–23 °C as depicted in Table S1 (a,b) (Supporting Information).…”

Intumescent flame retardancy and smoke suppression of Eucommia ulmoides gum/natural rubber blends based on synergistic g-C3N4@Fe3O4 nanocomposites

“…6 Additionally, it was needed to investigate the ame retardancy of rubber, aiming to meet quite a lot of areas with high ame retardancy requirements, such as aerospace, electrical insulating products, electrical wires and cables. 7,8 Adding ame retardants into rubber can effectively improve its ame retardant property. Compared with other ame retardants, the intumescent ame retardant (IFR) plays the roles of heat insulation, oxygen insulation, smoke suppression, and prevention of dripping.…”

“…6 Additionally, it was needed to investigate the flame retardancy of rubber, aiming to meet quite a lot of areas with high flame retardancy requirements, such as aerospace, electrical insulating products, electrical wires and cables. 7,8…”

Anti-flammability, mechanical and thermal properties of bio-based rigid polyurethane foams with the addition of flame retardants

“…Furthermore, the toxic gases and high temperature hamper humans and animals from escaping to safe place. [10][11][12] At present, numerous polyurethane foams in practical applications barely have property of ame resistance. In view of ammability control and environmental protection, the RPUFs with improved ame resistance needs to be further developed.…”