Citation

Xu W, Wang G, Xu J, Liu Y, Chen R, Yan H. J. Hazard. Mater. 2019; 379: e120819.

Affiliation

School of Materials Science and Chemical Engineering, Anhui Jianzhu University, 292 Ziyun Road, Hefei, Anhui 230601, People's Republic of China.

Copyright

(Copyright © 2019, Elsevier Publishing)

DOI

10.1016/j.jhazmat.2019.120819

PMID

31276921

Abstract

In this work, the core-shell structure (ZIF-8@MA) was prepared first with melamine (MA) coated zeolitic imidazolate framework-8 (ZIF-8), and the ternary composite ZMD containing Si-N-Zn was successfully synthesized with the diatomite modified ZIF-8@MA. Subsequently, the prepared ZMD was added into rigid polyurethane foam (RPUF) to investigate its effect on fire safety of RPUF. The results of cone calorimeter and limiting oxygen index (LOI) tests indicated that ZMD effectively reduced the fire hazard of RPUF. This was because of the physical barrier effect of diatomite, the co-catalyzed char formation in the condensed phase of ZnO produced by the decomposition of ZIF-8 and silica produced by the decomposition of diatomite, and the gas phase effect of MA that enabled RPUF to achieve excellent flame retardancy and smoke suppression. The specific mechanism of flame retardancy and smoke suppression of ZMD for RPUF was also discussed in this study.

Copyright © 2019 Elsevier B.V. All rights reserved.

Language: en

Keywords

Diatomite; Flame retardancy; Imidazolate; Melamine; Rigid polyurethane foam; Zeolitic; framework-8