Preparation and Flame-retartant Property of LaCl3 Doped Polyacrylamide/Silica Ash-based Flame Retardant Materials

doi:10.11901/1005.3093.2016.385

Chinese Journal of Materials Research

2017, Vol. 31

Issue (5): 387-393 DOI: 10.11901/1005.3093.2016.385

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Preparation and Flame-retartant Property of LaCl₃ Doped Polyacrylamide/Silica Ash-based Flame Retardant Materials

Yachao WANG(

), Jiangping ZHAO, Yuanyuan TONG, Jianxiong DING

College of Materials & Mineral Resources, Xi'an University of Architecture and Technology Xi'an 710055, China

Cite this article:

Yachao WANG, Jiangping ZHAO, Yuanyuan TONG, Jianxiong DING. Preparation and Flame-retartant Property of LaCl₃ Doped Polyacrylamide/Silica Ash-based Flame Retardant Materials. Chinese Journal of Materials Research, 2017, 31(5): 387-393.

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Abstract

LaCl₃ doped organic-inorganic hybrid flame-retardant materials of LaCl₃/PAM/ SiO₂nH₂O were prepared with Na₂SiO₃9H₂O-KOH modified silica ash as base material, and with PAM, LaCl₃7H₂O and Na₄P₂O₇10H₂O as additives. Then the effect of the addition amount of PAM, LaCl₃7H₂O and Na₄P₂O₇10H₂O on the flame-retardant property of the LaCl₃/PAM/ SiO₂nH₂O was investigated via orthogonal experiments L₉(3⁴). In the meanwhile, the flame-retardant materials of LaCl₃/PAM/ SiO₂nH₂O were characterized by using TG/DSC, SEM, XRD and FT-IR. Results show that the LOI of the cotton canvas with an applied surface film of LaCl₃/PAM/SiO₂nH₂O can reach 39.2%; the sequence of the effectiveness of the additives on the flame-retardant property of LaCl₃/PAM/SiO₂nH₂O can be ranked as PAM > LaCl₃7H₂O > Na₄P₂O₇10H₂O according to the results of range analysis. The results of XRD and SEM showed that the PAM favored the formation of denser amorphous swelling silica layers, the results of FT-IR and TG/DSC confirmed that the prepared flame-retardant materials held excellent high-temperature thermal stability, leading to the occurrence of heat insulation and fire-resistance effects.

Key words: composite flame retardant variance analysis microstructure mechanism

Received: 06 July 2016

Fund: Supported by Shanxi National Science Foundation and Natural Science Fund of Education Department

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	Yachao WANG
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https://www.cjmr.org/EN/10.11901/1005.3093.2016.385 OR https://www.cjmr.org/EN/Y2017/V31/I5/387

Table 1 Factors and levels of orthogonal experiments (%, mass fraction)

Table 2 Experiment scheme and results analysis

Table 3 Variance analysis of orthogonal experiments

Fig.1 XRD spectra of samples (a) silica ash;(b) S1;(c) S4, (d) S7, (e) S1 after firing, (f) S4 after firing, (g) S7 after firing

Fig.2 FT-IR spectra of samples (a) silica ash; (b) S1; (c) S4; (d) S7

Fig.3 FT-IR spectra of samples after burning (a) silica ash; (b) S1; (c) S4; (d) S7

Fig.4 TG/DSC curves of sample (a) S1, (b) S4, (c) S7

Fig.5 Morphologies of samples (a) S1; (b) S1 after burning; (c) S4; (d) S4 after burning; (e) S7; (f) S7 after burning

Fig.6 Schematic diagram of flame retardant mechanism

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