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首页> 外文期刊>Polymers >All-Inorganic Intumescent Nanocoating Containing Montmorillonite Nanoplatelets in Ammonium Polyphosphate Matrix Capable of Preventing Cotton Ignition
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All-Inorganic Intumescent Nanocoating Containing Montmorillonite Nanoplatelets in Ammonium Polyphosphate Matrix Capable of Preventing Cotton Ignition

机译：能够防止棉花着火的聚磷酸铵基体中含有蒙脱土纳米片的全无机膨胀型纳米涂层

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摘要

In the present manuscript a new concept of completely inorganic intumescent flame retardant nanocoating comprised of sodium montmorillonite nanoplatelets embedded in an ammonium polyphosphate matrix has been investigated using cotton as model substrate. The coating, deposited by multistep adsorption from diluted water-based suspensions/solutions, homogenously cover each cotton fibers with average thicknesses below 50 nm and add-on up to 5% in weight. Combustion characterization evidences the interesting properties: indeed, the so-treated fabrics reached self-extinguishing during horizontal flame spread tests. Furthermore, when the coating add-on reaches 5%, no ignition has been observed during cone calorimetry tests under 35 kW/m 2 heat flux. Residue analyses pointed out the formation of an expanded all-inorganic coating capable of greatly improving char formation by exerting barrier function towards volatile release and heat transfer.
机译：在本手稿中，已经研究了一种新的概念，即使用棉作为模型基质，对完全无机膨胀型阻燃纳米涂层进行了研究，该涂层包括嵌入多磷酸铵基质中的蒙脱土钠纳米片。通过多步吸附从稀释的水基悬浮液/溶液中沉积的涂层均匀地覆盖了平均厚度低于50 nm的每根棉纤维，且添加量最高可达5％。燃烧特性证明了其有趣的特性：的确，如此处理的织物在水平火焰扩散测试中达到了自熄性。此外，当涂料添加量达到5％时，在35 kW / m 2热通量的锥形量热测试中未观察到起火。残留物分析指出，形成了一种扩展的全无机涂层，该涂层能够通过对挥发物的释放和传热施加阻挡作用来极大地改善炭的形成。

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