Flame retardant effects of GUP and sodium silicate on wood

doi:10.3969/j.issn.1000-1565.2019.03.007

Abstract

Abstract: Wood was treated by guanyl urea phosphate(GUP)firstly and sodium silicate(Na₂SiO₃)secondly to impart flame retardance. The flame retarding properties of the treated samples were investigated by cone calorimeter and the thermal behaviors of these samples were studied by differential thermogravimetry(DTG)and thermogravimetry(TG)in air. It was found that the combustion parameters including peak of heat release rate(HRR_peak), total heat release(THR), smoke production rate(SPR), total smoke product(TSP)and the yield of CO₂(Y_CO₂)were decreased considerably by the treatment of GUP and Na₂SiO₃ when compared with those of the untreated samples. Furthermore, wood treated by both GUP and Na₂SiO₃ had better flame retarding properties than that by only GUP possibly because GUP could accelerate dehydration and carbonation, and simultaneously Na₂SiO₃ could relatively increase the activation energy of cellulose, which resulted in the enhancement of wood thermal stabilization.

Key words: cone calorimeter, flame retardant, thermolysis, thermogravimetry analysis, wood

CLC Number:

TU545
TS67

ZHAO Juanjuan, LIU Gang, GAO Ming. Flame retardant effects of GUP and sodium silicate on wood[J]. Journal of Hebei University (Natural Science Edition), 2019, 39(3): 264-269.

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