Review of layer-by-layer self-assembly technology for fire protection of flexible polyurethane foam

2021 ◽  
Author(s):  
Quanyi Liu ◽  
Shansong Gao ◽  
Yinlong Zhao ◽  
Wan Tao ◽  
Xingke Yu ◽  
...  
Keyword(s):  
Polyurethane Foam ◽  
Fire Protection ◽  
Self Assembly ◽  
Layer By Layer ◽  
Assembly Technology ◽  
Flexible Polyurethane Foam ◽  
Flexible Polyurethane

scholarly journals Correlation of Montmorillonite Sheet Thickness and Flame Retardant Behavior of a Chitosan–Montmorillonite Nanosheet Membrane Assembled on Flexible Polyurethane Foam

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 213 ◽  
Author(s):  
Peng Chen ◽  
Yunliang Zhao ◽  
Wei Wang ◽  
Tingting Zhang ◽  
Shaoxian Song
Keyword(s):  
Flame Retardant ◽  
Flame Retardancy ◽  
Sheet Thickness ◽  
Wall Structure ◽  
Layer By Layer ◽  
Lbl Assembly ◽  
Assembly Technology ◽  
Flexible Polyurethane Foam ◽  
Flexible Polyurethane ◽  
Different Thickness

Polymer–clay membranes constructed via the layer-by-layer (LbL) assembly, with a nanobrick wall structure, are known to exhibit high flame retardancy. In this work, chitosan–montmorillonite nanosheet (CH–MMTNS) membranes with different thickness of MMTNS were constructed to suppress the flammability of flexible polyurethane (FPU) foam. It was found that a thinner MMTNS membrane was more efficient in terms of reducing the flammability of the FPU foam. This was because such MMTNS membrane could deposit cheek by jowl and form a dense CH–MMTNS membrane on the foam surface, thus greatly limiting the translation of heat, oxygen, and volatile gases. In contrast, a thicker MMTNS constructed a fragmentary CH–MMTNS membrane on the coated foam surface, due to its greater gravity and weaker electrostatic attraction of chitosan; thus, the flame retardancy of a thick MMTNS membrane was lower. Moreover, the finding of different deposition behaviors of MMTNS membranes with different thickness may suggest improvements for the application of clay with the LbL assembly technology.

scholarly journals Experimental and numerical perspective on the fire performance of MXene/Chitosan/Phytic acid coated flexible polyurethane foam

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Bo Lin ◽  
Anthony Chun Yin Yuen ◽  
Timothy Bo Yuan Chen ◽  
Bin Yu ◽  
Wei Yang ◽  
...  
Keyword(s):  
Phytic Acid ◽  
Polyurethane Foam ◽  
Flame Retardants ◽  
Layer By Layer ◽  
Aromatic Rings ◽  
Pyrolysis Model ◽  
Biomass Materials ◽  
Flexible Polyurethane Foam ◽  
Flexible Polyurethane ◽  
Phosphorous Compounds

AbstractRecent discoveries of two-dimensional transitional metal based materials have emerged as an excellent candidate for fabricating nanostructured flame-retardants. Herein, we report an eco-friendly flame-retardant for flexible polyurethane foam (PUF), which is synthesised by hybridising MXene (Ti$$_3\hbox {C}_2$$ 3 C 2 ) with biomass materials including phytic acid (PA), casein, pectin, and chitosan (CH). Results show that coating PUFs with 3 layers of CH/PA/Ti$$_3\hbox {C}_2$$ 3 C 2 via layer-by-layer approach reduces the peak heat release and total smoke release by 51.1% and 84.8%, respectively. These exceptional improvements exceed those achieved by a CH/Ti$$_3\hbox {C}_2$$ 3 C 2 coating. To further understand the fundamental flame and smoke reduction phenomena, a pyrolysis model with surface regression was developed to simulate the flame propagation and char layer. A genetic algorithm was utilised to determine optimum parameters describing the thermal degradation rate. The superior flame-retardancy of CH/PA/Ti$$_3\hbox {C}_2$$ 3 C 2 was originated from the shielding and charring effects of the hybrid MXene with biomass materials containing aromatic rings, phenolic and phosphorous compounds.

Layered double hydroxide-decorated flexible polyurethane foam: significantly improved toxic effluent elimination

RSC Advances ◽  
2015 ◽  
Vol 5 (118) ◽  
pp. 97458-97466 ◽  
Author(s):  
Lei Liu ◽  
Wei Wang ◽  
Yuan Hu
Keyword(s):  
Thermal Stability ◽  
Polyurethane Foam ◽  
Layered Double Hydroxide ◽  
Flame Retardancy ◽  
Smoke Suppression ◽  
Layer By Layer ◽  
Layer Method ◽  
Flexible Polyurethane Foam ◽  
Flexible Polyurethane ◽  
Double Hydroxide

A layered double hydroxide-based fire-blocking coating was deposited on the surface of a flexible polyurethane foam using a layer-by-layer method to improve its thermal stability, flame retardancy and smoke suppression properties.

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