MXene/chitosan nanocoating for flexible polyurethane foam towards remarkable fire hazards reductions.

Autor: Lin B; School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia., Yuen ACY; School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia., Li A; School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia., Zhang Y; Department of Chemical and Materials Engineering, Hefei University, 99 Jinxiu Avenue, Hefei, Anhui, 230601, China., Chen TBY; School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia., Yu B; Department of Architecture and Civil Engineering, City University of Hong Kong, 88 Tat Chee Avenue, Kowloon, Hong Kong, China. Electronic address: yubin2-c@my.cityu.edu.hk., Lee EWM; Department of Architecture and Civil Engineering, City University of Hong Kong, 88 Tat Chee Avenue, Kowloon, Hong Kong, China., Peng S; School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia., Yang W; School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia; Department of Chemical and Materials Engineering, Hefei University, 99 Jinxiu Avenue, Hefei, Anhui, 230601, China. Electronic address: yangwei@hfuu.edu.cn., Lu HD; Department of Chemical and Materials Engineering, Hefei University, 99 Jinxiu Avenue, Hefei, Anhui, 230601, China., Chan QN; School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia., Yeoh GH; School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia., Wang CH; School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2020 Jan 05; Vol. 381, pp. 120952. Date of Electronic Publication: 2019 Jul 31.
DOI: 10.1016/j.jhazmat.2019.120952
Abstrakt: MXene/chitosan nanocoating for flexible polyurethane foam (PUF) was prepared via layer-by-layer (LbL) approach. MXene (Ti 3 C 2 ) ultra-thin nanosheets were obtained through etching process of Ti 3 AlC 2 followed by exfoliation. The deposition of MXene/chitosan nanocoating was conducted by alternatingly immersing the PUF into a chitosan solution and a Ti 3 C 2 aqueous dispersion, which resulted in different number of bilayers (BL) ranging from 2, 5 and 8. Owing to the utilization of ultra-thin Ti 3 C 2 nanosheets, the weight gain was only 6.9% for 8 BL coating of PUF, which minimised the unfavourable impact on the intrinsic properties of PUF. The Ti 3 C 2 /chitosan coating significantly reduced the flammability and smoke releases of PUF. Compared with unmodified PUF, the 8 BL coating reduced the peak heat release rate by 57.2%, alongside with a 65.5% reduction in the total heat release. The 8 BL coating also showed outstanding smoke suppression ability with total smoke release decreased by 71.1% and peak smoke production rate reduced by 60.3%, respectively. The peak production of CO and CO 2 gases also decreased by 70.8% and 68.6%, respectively. Furthermore, an outstanding char formation performance of 37.2 wt.% residue was obtained for 8 BL coated PUF, indicating the excellent barrier and carbonization property of the hybrid coating.
(Copyright © 2019 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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