Inorganic Nanoparticle Thin Film that Suppresses Flammability of Polyurethane with only a Single Electrostatically-Assembled Bilayer

Patra, Debabrata; Vangal, Prithvi; Cain, Amanda A.; Cho, Chungyeon; Regev, Oren; Grunlan, Jaime C.

doi:10.1021/am504455k

Cited by 88 publications

(71 citation statements)

References 51 publications

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“…S5). After 10 s of horizontal combustibility test ( 46 ), the neat PU foam sample was almost consumed, with only a small piece of debris left (Fig. 6, D and E, and movie S3).…”

Section: Resultsmentioning

confidence: 99%

Biomimetic nanocoatings with exceptional mechanical, barrier, and flame-retardant properties from large-scale one-step coassembly

et al. 2017

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“…S5). After 10 s of horizontal combustibility test ( 46 ), the neat PU foam sample was almost consumed, with only a small piece of debris left (Fig. 6, D and E, and movie S3).…”

Section: Resultsmentioning

confidence: 99%

Biomimetic nanocoatings with exceptional mechanical, barrier, and flame-retardant properties from large-scale one-step coassembly

et al. 2017

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“…Interesting progress towards nanostructured, fire-resistant coatings has been reported for ultrathin coatings based on step-wise, layer-by-layer (LbL) deposition of different polymers and nanoclay2236373839404142, in which substrates are alternatingly dipped into polymer and nanoclay to build up multilayers of organic and inorganic phases. Even though attractive fire barrier properties could be shown, the process requires several deposition steps needed to reach the desired properties (e.g., 20–40 deposition steps)434445464748.…”

mentioning

confidence: 99%

Large-scale, thick, self-assembled, nacre-mimetic brick-walls as fire barrier coatings on textiles

Das

Thomas

Moeller

et al. 2017

Sci Rep

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Highly loaded polymer/clay nanocomposites with layered structures are emerging as robust fire retardant surface coatings. However, time-intensive sequential deposition processes, e.g. layer-by-layer strategies, hinders obtaining large coating thicknesses and complicates an implementation into existing technologies. Here, we demonstrate a single-step, water-borne approach to prepare thick, self-assembling, hybrid fire barrier coatings of sodium carboxymethyl cellulose (CMC)/montmorillonite (MTM) with well-defined, bioinspired brick-wall nanostructure, and showcase their application on textile. The coating thickness on the textile is tailored using different concentrations of CMC/MTM (1–5 wt%) in the coating bath. While lower concentrations impart conformal coatings of fibers, thicker continuous coatings are obtained on the textile surface from highest concentration. Comprehensive fire barrier and fire retardancy tests elucidate the increasing fire barrier and retardancy properties with increasing coating thickness. The materials are free of halogen and heavy metal atoms, and are sourced from sustainable and partly even renewable building blocks. We further introduce an amphiphobic surface modification on the coating to impart oil and water repellency, as well as self-cleaning features. Hence, our study presents a generic, environmentally friendly, scalable, and one-pot coating approach that can be introduced into existing technologies to prepare bioinspired, thick, fire barrier nanocomposite coatings on diverse surfaces.

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“…Layer-by-layer (LbL) assembly has proven to be an effective method to impart non-halogenated FR coatings on PU foam [9][10][11][12][13][14][15][16][17], as well as other flammable materials such as cotton [18][19][20][21][22][23], nylon [24][25][26], and polyester fabric [23,27]. LbL involves alternate adsorption of positively and negatively charged polyelectrolytes from aqueous solution [28,29].…”

Section: Introductionmentioning

confidence: 99%

“…Clay is a passive flame retardant, functioning as an inflammable barrier to heat that protects the underlying foam [44]. Boehmite, an active FR mineral, was recently paired with vermiculite clay, using LbL assembly, to effectively suppress flame on PU foam [14]. Boehmite is able to release water when decomposing at high temperature (over 450°C), reducing the heat of its surroundings and releasing an inert gas to dilute the flame.…”

Section: Introductionmentioning

confidence: 99%

Aluminum hydroxide multilayer assembly capable of extinguishing flame on polyurethane foam

et al. 2015

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Polyurethane foam found in household furnishings and bedding creates a severe fire hazard, resulting in loss of life and property each year. In an effort to reduce the flammability of polyurethane foam, a polyelectrolyte multilayer (PEM) coating, comprised of polyethylenimine and polyacrylic acid-stabilized aluminum hydroxide (ATH), was deposited onto foam using layer-by-layer (LbL) assembly. PEM coatings with and without incorporation of ATH were deposited and compared to assess the effectiveness of ATH on flame suppression. All recipes resulted in conformal coatings, maintaining the open cellular structure of the foam. Only three bilayers of PEI/ PAA-ATH retained the shape of foam after exposure to a butane torch flame for 10 s. With six bilayers, the flame was extinguished, which prevented flashover. Cone calorimetry revealed that this 6 BL coated foam exhibited a 64 % reduction in peak heat release rate and a 44 % reduction in maximum average rate of heat emission. This work demonstrates an extraordinarily effective flame-retardant nanocoating that uses environmentally benign chemistry and relatively few deposition steps, prepared using LbL assembly.

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Inorganic Nanoparticle Thin Film that Suppresses Flammability of Polyurethane with only a Single Electrostatically-Assembled Bilayer

Cited by 88 publications

References 51 publications

Biomimetic nanocoatings with exceptional mechanical, barrier, and flame-retardant properties from large-scale one-step coassembly

Biomimetic nanocoatings with exceptional mechanical, barrier, and flame-retardant properties from large-scale one-step coassembly

Large-scale, thick, self-assembled, nacre-mimetic brick-walls as fire barrier coatings on textiles

Aluminum hydroxide multilayer assembly capable of extinguishing flame on polyurethane foam

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