Construction and flame‐retardant performance of layer‐by‐layer assembled hexagonal boron nitride coatings on flexible polyurethane foams

2019 ◽  
Vol 136 (29) ◽  
pp. 47839 ◽  
Author(s):  
Xiaoqing Qiu ◽  
Zhiwei Li ◽  
Xiaohong Li ◽  
Laigui Yu ◽  
Zhijun Zhang
Keyword(s):  
Boron Nitride ◽  
Flame Retardant ◽  
Hexagonal Boron Nitride ◽  
Polyurethane Foams ◽  
Layer By Layer ◽  
Nitride Coatings ◽  
Flexible Polyurethane

Fabrication of binary hybrid-filled layer-by-layer coatings on flexible polyurethane foams and studies on their flame-retardant and thermal properties

RSC Advances ◽  
2016 ◽  
Vol 6 (82) ◽  
pp. 78286-78295 ◽  
Author(s):  
Haifeng Pan ◽  
Yushi Lu ◽  
Lei Song ◽  
Xiaotao Zhang ◽  
Yuan Hu
Keyword(s):  
Graphene Oxide ◽  
Thermal Properties ◽  
Flame Retardant ◽  
Polyurethane Foams ◽  
Layer By Layer ◽  
Silica Nanospheres ◽  
Assembly Method ◽  
Layer By Layer Assembly ◽  
Flexible Polyurethane ◽  
Layer Assembly

A binary hybrid-filled flame-retardant coating, consisting of graphene oxide (GO) and amino-terminated silica nanospheres (KH-550-SiO2), was fabricated onto a flexible polyurethane (FPU) foam using the layer-by-layer assembly method.

scholarly journals Mechanically Sustainable Starch-Based Flame-Retardant Coatings on Polyurethane Foams

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1286
Author(s):  
Kyung-Who Choi ◽  
Jun-Woo Kim ◽  
Tae-Soon Kwon ◽  
Seok-Won Kang ◽  
Jung-Il Song ◽  
...  
Keyword(s):  
Heat Release ◽  
Flame Retardant ◽  
Coating Layer ◽  
Real Life ◽  
Polyurethane Foams ◽  
Layer By Layer ◽  
Toxic Substances ◽  
Cone Calorimetry ◽  
Coating Agent ◽  
Cone Calorimeter Test

The use of halogen-based materials has been regulated since toxic substances are released during combustion. In this study, polyurethane foam was coated with cationic starch (CS) and montmorillonite (MMT) nano-clay using a spray-assisted layer-by-layer (LbL) assembly to develop an eco-friendly, high-performance flame-retardant coating agent. The thickness of the CS/MMT coating layer was confirmed to have increased uniformly as the layers were stacked. Likewise, a cone calorimetry test confirmed that the heat release rate and total heat release of the coated foam decreased by about 1/2, and a flame test showed improved fire retardancy based on the analysis of combustion speed, flame size, and residues of the LbL-coated foam. More importantly, an additional cone calorimeter test was performed after conducting more than 1000 compressions to assess the durability of the flame-retardant coating layer when applied in real life, confirming the durability of the LbL coating by the lasting flame retardancy.

Surface-coating engineering for flame retardant flexible polyurethane foams: A critical review

2019 ◽  
Vol 176 ◽  
pp. 107185 ◽  
Author(s):  
Haitang Yang ◽  
Bin Yu ◽  
Pingan Song ◽  
Cristian Maluk ◽  
Hao Wang
Keyword(s):  
Flame Retardant ◽  
Critical Review ◽  
Surface Coating ◽  
Polyurethane Foams ◽  
Flexible Polyurethane

Screening effect of monolayer van der Waals crystals on surface deicing: a molecular simulation study

2020 ◽  
Vol 22 (47) ◽  
pp. 27873-27881
Author(s):  
Yue Wang ◽  
Yufeng Guo ◽  
Wanlin Guo
Keyword(s):  
Boron Nitride ◽  
Molecular Simulation ◽  
Simulation Study ◽  
Hexagonal Boron Nitride ◽  
Van Der Waals ◽  
Monolayer Graphene ◽  
Screening Effect ◽  
Nitride Coatings

Significant screening effect of monolayer graphene and hexagonal boron nitride coatings on surface deicing of superhydrophilic and superhydrophobic crystals.

scholarly journals Synergistic Effects of Black Phosphorus/Boron Nitride Nanosheets on Enhancing the Flame-Retardant Properties of Waterborne Polyurethane and Its Flame-Retardant Mechanism

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1487 ◽  
Author(s):  
Sihao Yin ◽  
Xinlin Ren ◽  
Peichao Lian ◽  
Yuanzhi Zhu ◽  
Yi Mei
Keyword(s):  
Boron Nitride ◽  
Heat Release ◽  
Flame Retardant ◽  
Hexagonal Boron Nitride ◽  
Synergistic Effects ◽  
Waterborne Polyurethane ◽  
Black Phosphorus ◽  
Limiting Oxygen Index ◽  
Polyurethane Composite ◽  
Black Phosphorene

We applied black phosphorene (BP) and hexagonal boron nitride (BN) nanosheets as flame retardants to waterborne polyurethane to fabricate a novel black phosphorus/boron nitride/waterborne polyurethane composite material. The results demonstrated that the limiting oxygen index of the flame-retarded waterborne polyurethane composite increased from 21.7% for pure waterborne polyurethane to 33.8%. The peak heat release rate and total heat release of the waterborne polyurethane composite were significantly reduced by 50.94% and 23.92%, respectively, at a flame-retardant content of only 0.4 wt%. The superior refractory performances of waterborne polyurethane composite are attributed to the synergistic effect of BP and BN in the gas phase and condensed phase. This study shows that black phosphorus-based nanocomposites have great potential to improve the fire resistance of polymers.

scholarly journals Layer-by-Layer Dielectric Breakdown of Hexagonal Boron Nitride

ACS Nano ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. 916-921 ◽  
Author(s):  
Yoshiaki Hattori ◽  
Takashi Taniguchi ◽  
Kenji Watanabe ◽  
Kosuke Nagashio
Keyword(s):  
Boron Nitride ◽  
Dielectric Breakdown ◽  
Hexagonal Boron Nitride ◽  
Layer By Layer

A New Flame Retardant Additive for Conventional Flexible Polyurethane Foams

1991 ◽  
Vol 27 (1) ◽  
pp. 32-32
Author(s):  
T. Ebbrecht ◽  
V. Zellmer ◽  
G. Burkhart
Keyword(s):  
Flame Retardant ◽  
Polyurethane Foams ◽  
Flexible Polyurethane

Flame-retardant activity of modified boron nitride nanosheets to cotton

2019 ◽  
Vol 90 (5-6) ◽  
pp. 512-522 ◽  
Author(s):  
Hong Liu ◽  
Yang Du ◽  
Shaohua Lei ◽  
Zhuoqun Liu
Keyword(s):  
Boron Nitride ◽  
Flame Retardant ◽  
Hexagonal Boron Nitride ◽  
Cotton Fabrics ◽  
High Yield ◽  
Limiting Oxygen Index ◽  
Boron Nitride Nanosheets ◽  
Boron Nitride Powder ◽  
Coated Fabrics ◽  
Index Value

Boron nitride nanosheets (BNN) were prepared by molten hydroxide-assisted liquid exfoliation from hexagonal boron nitride powder with an effectively high yield, and then modified with hexachlorocyclotriphosphazene (HCCP) to obtain HCCP-BNN. The series of samples were applied to prepare flame-retardant cotton fabrics with the impregnation-drying method, and successful treatment was confirmed by scanning electron microscopy. The combustion performance of the as-prepared cotton fabrics was tested and evaluated. After coating with HCCP-BNN, the combustion rate of the fabric is reduced in vertical and horizontal combustion conditions and the limiting oxygen-index value of cotton fabric increases to 24.1, becoming less flammable than the blank cotton. The fibrous structure of the BNN and HCCP-BNN coated fabrics is relatively complete after combustion, which indicates that BNN have a certain protective effect on the fabric. The results demonstrate HCCP-BNN as an effective flame-retardant for cotton fabrics.

Enhanced thermal conductivity and flame retardancy of polyamide 6/flame retardant composites with hexagonal boron nitride

2018 ◽  
Vol 38 (8) ◽  
pp. 767-774 ◽  
Author(s):  
Liang Wang ◽  
Luchong Zhang ◽  
Andreas Fischer ◽  
Yuhua Zhong ◽  
Dietmar Drummer ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Boron Nitride ◽  
Flame Retardant ◽  
Flame Retardancy ◽  
High Performance ◽  
Heat Dissipation ◽  
Hexagonal Boron Nitride ◽  
Light Emitting Diode ◽  
Polyamide 6 ◽  
Twin Screw

Abstract High performance composite of polyamide 6 (PA6)/flame retardant (FR)/hexagonal boron nitride (hBN) was prepared via twin screw extrusion, followed by injection molding. The heat dissipation of the composite was significantly improved by incorporating 40 vol% of hBN, and the corresponding thermal conductivity was up to 5.701 W/(m·K), nearly 17 times that of the PA6/FR composites. In addition, the combination effect of hBN and FR to the flame retardancy of the composites was observed, and the addition of hBN could dramatically enhance the flame retardancy of composites, achieving a UL94 V-0 rating with a limited oxygen index (LOI) value of 37%. This multifunctional modification would broaden the application field of PA6 composites in light-emitting diode (LED) lamps, electronic products, and so on.

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