| 초록 |
Graphite oxides (GOs) at various oxidation states were examined as fire retardants of epoxy resin. Excessive oxidation was detrimental to the fire retardant effect of GO because it generated a weak GO with reduced intumescent ability. GO manifested optimum fire retardant properties due to effective intumescence when it was properly oxidized, demonstrating that intumescent GO needs to be strong enough to effectively push the epoxy resin matrix apart to cause efficient intumescence and to generate a solid remnant char that acts as an efficient barrier. When dispersion of GO in the epoxy resin was enhanced by sonication, the fire retardant effect of GO was also reduced. This showed that fine dispersion and disordering the layered structure of GO by the intercalation of epoxy molecules into the gallery of GO also reduced intumescent ability, and consequently the fire retardant effects of GO. |
