Authors: Yuanlin Ren Yue Zhang Jieyun Zhao Xiuli Wang Qian Zeng Yetong Gu
Publish Date: 2016/12/01
Volume: 82, Issue: 1, Pages: 280-288
Abstract
In this study in order to increase the flame retardancy of polyacrylonitrile fiber fabric an organic–inorganic hybrid silane coating doped with polyphosphoric acid was prepared using tetraethoxysilane as the precursor by sol–gel technique Fourier transform infrared spectroscopy Xray photoelectron spectroscopy and scanning electron microscope confirm the successful silicon and phosphorusdoped silicon coating on polyacrylonitrile fabric Obviously the char residue values at 800 °C of the silicacoated and phosphorusdoped silica coated polyacrylonitrile fabric samples were observed to increase 1793 and 2592 respectively than that of the control sample The peak and total heat releases of the phosphorusdoped silica coated polyacrylonitrile fabric significantly reduced to only 449 and 421 of that of polyacrylonitrile fabric respectively Besides both the peak values of smoke production rate and total smoke production are remarkably reduced The results show that the coated layer can effectively improve the thermal stability and strengthen the ability to form a thermally stable and condensed barrier for heat and mass transfer Furthermore the phosphorusdoped silicacoated polyacrylonitrile fabric provided a novel and efficient method to prepare flame retardant polyacrylonitrile fabric with attractive featuresIn this article an efficient and facile method was successfully demonstrated to prepare novel fire retardant PAN fabric The organic–inorganic hybrid silane coating doped with polyphosphoric acid PPA can effectively retard the thermal degradation of PAN fabric enhane the charforming ability and can produce a stable and compact shielding layer The phosphorusdoped silicacoated PAN fabric has lower values of pHRR THR pSPR TSP aMLR and FIGRA compared to the control PAN fabric Open image in new window
Keywords: