Effective non-halogen flame-retardants combined with nSiO2 particles to improve thermal stability and fire resistance of high-performance polyurethane nanocomposite foams - Archive ouverte HAL Access content directly
Journal Articles Journal of Materials Science and Technology Year : 2024

Effective non-halogen flame-retardants combined with nSiO2 particles to improve thermal stability and fire resistance of high-performance polyurethane nanocomposite foams

Anh Dung Tran Le
Yuri Ferreira da Silva

Abstract

This study focuses on the improvement of the thermal stability and flame-retardant performance of polyurethane (PU) foam by using effective flame-retardant additives and nano silica (nSiO2) particles from rice husk. The addition of non-halogen flame retardants (FRs) including aluminum trihydroxide (ATH), triphenyl phosphate (TPP), and diammonium phosphate (DAP) leads to markedly enhanced thermal stability and fire resistance of the PU/nSiO2/FRs nanocomposites, resulting in achieving UL-94 HB standard. In particular, the nanocomposites met the UL-94 V-0 criteria thanks to the inclusion of DAP at 25 phr. The LOI value of the nanocomposites reached 26% which is much higher than that of PU/nSiO2 nanocomposite, about 20%. In order to further understand the fire-proof mechanism, the residue char layer remaining of the PU/nSiO2/FRs nanocomposites after being burned was also investigated by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR). In addition, the microstructure, thermal stability, thermal conductivity, and mechanical properties of nanocomposites were also evaluated in this study.
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Dates and versions

hal-04530552 , version 1 (02-05-2024)

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Lam Pham, Ngoc Thuy Nguyen, Dang Mao Nguyen, Tuan An Nguyen, Tan Binh Nguyen, et al.. Effective non-halogen flame-retardants combined with nSiO2 particles to improve thermal stability and fire resistance of high-performance polyurethane nanocomposite foams. Journal of Materials Science and Technology, inPress, ⟨10.1016/j.jmst.2024.02.066⟩. ⟨hal-04530552⟩
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