A fully bio-based coating made from alginate, chitosan and hydroxyapatite for protecting flexible polyurethane foam from fire. (15th October 2020)

• Record Type: Journal Article
• Authors: Nabipour, Hafezeh; Wang, Xin; Song, Lei; Hu, Yuan
• Is Part Of: Carbohydrate polymers. Volume 246(2020)
• Publication Date: 2020-10-15
• Subjects: α-ZrP α-zirconium phosphate -- ATH aluminum hydroxide -- BL bilayer -- CNTs carbon nanotubes -- CO carbon monoxide -- CH chitosan -- DTG differential thermogravimetric analysis -- EDX energy-dispersive X-ray -- FRs flame-retardants -- FPUF flexible polyurethane foam -- ATR-FTIR Fourier transformed-infrared spectroscopy in attenuated total reflectance -- h‐BN hexagonal boron nitride -- HAP hydroxyapatite -- HRR heat release rate -- LbL Layer-by-Layer -- LDH layered double hydroxide -- MMT montmorillonite -- PAA polyacrylic acid -- PAADP Poly(allylamine diphosphonate) -- PAH Poly(allylamine hydrochloride) -- PHRR peak heat release rate -- PEI polyethylenimine -- PPA Poly(phosphoric acid) -- PSP Poly(sodium phosphate) -- QL qudra layers -- SA sodium alginate -- SEM scanning electron microscope -- SF support factor -- SPR smoke production rate -- TGA thermogravimetric analysis -- THR total heat release -- TL trilayers -- TNT, titanate nanotubes -- TTI time of ignition -- XRD X-ray diffraction; Flexible polyurethane foam -- Hydroxyapatite -- Layer by layer assembly -- Flame-retardant -- Smoke suppressant; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2020.116641
• Languages: English
• ISSNs: 0144-8617

Abstract

Graphical abstract: Highlights: Layer-by-layer assembled fully bio-based coating protected flexible polyurethane foam (FPUF) from fire. Coated FPUF by 9 bilayers of alginate, chitosan and hydroxyapatite showed self-extinguishing behavior. Peak heat release rate of coated FPUF by 9 bilayers of alginate, chitosan and hydroxyapatite reduced by 77.7 %. Smoke production rate of coated FPUF by 9 bilayers of alginate, chitosan and hydroxyapatite declined by 53.8 %. Abstract: The present study reports the successful synthesis of the flame-retardant and smoke-suppressant flexible polyurethane foam (FPUF) through a fully bio-based coating. Hydroxyapatite (HAP) is added to the solutions containing sodium alginate (SA) and chitosan (CH), respectively, to create negative and positive polyelectrolytes for Layer-by-Layer (LbL) assembly. The influence of the solution concentrations and bilayers numbers deposited on the flame-retardant and mechanical properties of FPUF samples is investigated systematically. Benefitting from the presence of such a fully bio-based coating, the resultant FPUF affords excellent smoke-suppressant and flame-retardant features. In particular, the FPUF coated by 9 bilayers of HAP-SA/HAP-CH exhibits significantly declined peak heat release rate, total release rate and smoke production release by 77.7 %, 56.5 % and 53.8 %, respectively. The compression test verifies the coated FPUFs exhibit lower recovery properties compared with the uncoated one. These results demonstrate that a green and cost-effective strategy is provided for producing flame-retardant, anti-dripping and smoke-suppressant FPUFs.