Sandwichlike Coating Consisting of Alternating Montmorillonite and β-FeOOH for Reducing the Fire Hazard of Flexible Polyurethane Foam

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

20 Scopus Citations
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Author(s)

  • Haifeng Pan
  • Yongqian Shi
  • Ying Pan
  • Lei Song
  • Yuan Hu

Detail(s)

Original languageEnglish
Pages (from-to)3214-3223
Journal / PublicationACS Sustainable Chemistry and Engineering
Volume3
Issue number12
Early online date30 Oct 2015
Publication statusPublished - 7 Dec 2015

Abstract

A novel nanocoating, composed of montmorillonite (MMT) nanosheets and β-FeOOH nanorods, was deposited on the surface of flexible polyurethane (FPU) foams through a layer-by-layer assembly technique to reduce its flamability. The coating growth was performed by alternately immersing FPU foams into polyethylenimine (PEI) solution, MMT-alginate suspension, and β-FeOOH dispersion. Structural and morphological characterization indicated that MMT nanosheets and β-FeOOH nanorods were distributed homogeneously on the surface of the matrix and formed a sandwichlike topology. The coated FPU foams showed the lower peak heat release rate (PHRR), compared to the counterparts fabricated by introduction of MMT nanosheets or β-FeOOH nanorods alone. Furthermore, the concentration of volatile products released from the coated FPU foams was reduced remarkably, indicating that the binary components had tremendous advantages in reducing the flamability of the material. These significant improvements in flame retardancy and toxic gas suppression could be attributed to the following: the MMT-based layers and the network formed by β-FeOOH nanorods exhibited a "labyrinth effect" to retard the permeation of heat, oxygen, and mass between the flame and underlying FPU matrix.

Research Area(s)

  • Fire hazard, Layer-by-layer assembly, Mechanism, Montmorillonite, β-FeOOH nanorods

Citation Format(s)

Sandwichlike Coating Consisting of Alternating Montmorillonite and β-FeOOH for Reducing the Fire Hazard of Flexible Polyurethane Foam. / Wang, Wei; Pan, Haifeng; Shi, Yongqian; Yu, Bin; Pan, Ying; Liew, Kim Meow; Song, Lei; Hu, Yuan.

In: ACS Sustainable Chemistry and Engineering, Vol. 3, No. 12, 07.12.2015, p. 3214-3223.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review