EFFECT OF NANO-SiO2 ON FLAME RETARDANCY AND COMBUSTION BEHAVIOR OF INTUMESCENT FLAME RETARDED COTTON

摘要

This paper was aimed at documenting the synergistic effect of the nano-silica on the flame resistant behavior of intumescent retardant cotton fabric.The results of the limited oxygen index (LOI) test and the vertical burning test (VBT) demonstrated that the flame retardancy of the treated cotton fabric was optimized when 4wt.％ APP/PER/MEL was replaced by the 4％ nano-silica.But it is impaired with increasing the concentration of nano-silica.Char residues, characteristic decomposition temperatures and heat release data from thermogravimetric (TG) and micro-scale combustion calorimeter (MCC) measurements revealed that appropriate addition of nano-silica into traditional IFR system can improve the fire protection properties of IFR-CF to a certain extent, but cause depress in thermal stability of IFR-CF.Therefore, for cellulosic textiles, it is not strongly recommended for use of nano-silica as synergistic agents in IFR system.