Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, sede di Alessandria, Viale Teresa Michel 5, 15121 Alessandria, Italy.
Carbohydr Polym. 2013 Jan 30;92(1):114-9. doi: 10.1016/j.carbpol.2012.08.086. Epub 2012 Aug 30.
Silica-based assemblies have been deposited on cotton fibres through Layer by Layer technique in order to enhance their flame retardant properties. To this aim, three different deposition procedures (namely, dipping, vertical and horizontal sprays) have been considered and compared. The resulting morphologies of the deposited assemblies have been thoroughly investigated by scanning electron microscopy (SEM) and elemental analysis. SEM observations have demonstrated that only the horizontal spray allows obtaining the deposition of a very homogeneous silica coating when compared to vertical spray or dipping. As a consequence, horizontal spray has proved to ensure the best flame resistance, promoting a substantial increase of the total burning time and final residue, as assessed by flammability tests. Furthermore, cone calorimetry measurements have shown a remarkable increase of the time to ignition, and a significant decrease of heat release rate and total heat release for the fabrics treated by horizontal spray.
通过层层技术，将基于硅的组件沉积在棉纤维上，以提高其阻燃性能。为此，考虑并比较了三种不同的沉积程序（即浸渍、垂直和水平喷射）。通过扫描电子显微镜（SEM）和元素分析对沉积组件的形貌进行了彻底研究。SEM 观察表明，与垂直喷射或浸渍相比，只有水平喷射才能获得非常均匀的硅涂层沉积。因此，水平喷射已被证明能够确保最佳的阻燃性，通过可燃性测试，大大增加总燃烧时间和最终残留物。此外，锥形量热计测量表明，经过水平喷射处理的织物的点火时间显著增加，放热率和总放热量显著降低。
