The fire protection and thermal stability properties of intumescent fire‐retardant coatings filled with three various clay nano‐fillers (layer double hydroxide [LDH], montmorillonite [MMT], and sepiolite) were compared by fire protection tests and thermo‐gravimetric analysis. The fire protection tests show that the incorporation of three fillers improves the fire protection properties of the intumescent fire‐retardant coatings and the addition of 1 wt% sepiolite exhibits the lowest flame spread rating of 9.9 and equilibrium backside temperature of 164.5°C at 900 seconds. TG analysis shows that the incorporation of nano‐fillers imparts a considerable enhancement of thermal stability and char formation to the intumescent coatings. Especially, the coating with 1 wt% sepiolite acquires the highest residual weight of 34.2% among the samples. Char residue analysis presents that the introduction of clay nano‐fillers plays a positive role in enhancing the compactness and anti‐oxidation ability of the char residues, and this positive effect as well as the flame‐retardant efficiency depends on the types of clay nano‐fillers. The three types of layered clay nano‐fillers exhibit synergistic flame‐retardant effectiveness in the order of sepiolite > MMT > LDH.

中文翻译：

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三种粘土纳米填料填充的膨胀型阻燃涂料防火性能和热稳定性的比较研究

通过防火测试和热重分析，比较了填充有三种不同粘土纳米填料（双层氢氧化物[LDH]，蒙脱土[MMT]和海泡石）的膨胀型防火涂料的防火和热稳定性能。防火测试表明，三种填料的加入改善了膨胀型防火涂料的防火性能，添加1 wt％的海泡石在900秒时表现出最低的火焰蔓延等级9.9和平衡背侧温度164.5°C。 。TG分析表明，纳米填料的加入大大提高了膨胀型涂料的热稳定性和炭形成。特别地，具有1重量％海泡石的涂层在样品中获得34.2％的最高残留重量。炭渣分析表明，粘土纳米填料的引入在增强炭渣的致密性和抗氧化能力方面发挥了积极作用，这种积极作用以及阻燃效率取决于粘土纳米填料的类型。填充物。三种类型的层状粘土纳米填料表现出协同的阻燃效果，依次为海泡石> MMT> LDH。