Jagdale Pravin, Salimpour Samera, Islam Md Hujjatul, Cuttica Fabio, Hernandez Francisco C Robles, Tagliaferro Alberto, Frache Alberto
DISAT, Politecnico di Torino, C.so Duca Degli Abruzzi, 24-10129, Torino, Italy.
Textile Department, Amirkabir University of Technology, 424, Hafez St., Tehran, 159163-4311, Iran.
J Nanosci Nanotechnol. 2018 Feb 1;18(2):1468-1473. doi: 10.1166/jnn.2018.15251.
Polydimethylsiloxane has exceptional fire retardancy characteristics, which make it a popular polymer in flame retardancy applications. Flame retardancy of polydimethylsiloxane with different nano fillers was studied. Polydimethylsiloxane composite fire property varies because of the shape, size, density, and chemical nature of nano fillers. In house made carbon and bismuth oxide nano fillers were used in polydimethylsiloxane composite. Carbon from biochar (carbonised bamboo) and a carbon by-product (carbon soot) were selected. For comparative study of nano fillers, standard commercial multiwall carbon nano tubes (functionalised, graphitised and pristine) as nano fillers were selected. Nano fillers in polydimethylsiloxane positively affects their fire retardant properties such as total smoke release, peak heat release rate, and time to ignition. Charring and surface ceramization are the main reasons for such improvement. Nano fillers in polydimethylsiloxane may affect the thermal mobility of polymer chains, which can directly affect the time to ignition. The study concludes that the addition of pristine multiwall carbon nano tubes and bismuth oxide nano particles as filler in polydimethylsiloxane composite improves the fire retardant property.
聚二甲基硅氧烷具有卓越的阻燃特性，这使其成为阻燃应用中一种受欢迎的聚合物。研究了添加不同纳米填料的聚二甲基硅氧烷的阻燃性能。聚二甲基硅氧烷复合材料的燃烧性能因纳米填料的形状、尺寸、密度和化学性质而异。在聚二甲基硅氧烷复合材料中使用了自制的碳和氧化铋纳米填料。选用了生物炭（碳化竹子）中的碳和一种碳副产物（碳黑）。为了对纳米填料进行对比研究，选用了标准商用多壁碳纳米管（功能化、石墨化和原始态）作为纳米填料。聚二甲基硅氧烷中的纳米填料对其阻燃性能有积极影响，如总烟雾释放量、热释放峰值速率和着火时间。炭化和表面陶瓷化是性能提高的主要原因。聚二甲基硅氧烷中的纳米填料可能会影响聚合物链的热迁移率，这会直接影响着火时间。该研究得出结论，在聚二甲基硅氧烷复合材料中添加原始态多壁碳纳米管和氧化铋纳米颗粒作为填料可提高其阻燃性能。
