Soot is one of the degradation products of material burning, having the fingerprints of the conditions in which it is formed. In this work, in-flame soot was probed from flaming combustion of balsa core and its sandwich composite at different heat flux scenarios during mass loss cone calorimeter tests. Soot probing was performed by thermophoresis. Electron microscopy was performed to analyze the size of the particulate media at multiscale. The size of the aggregates and the primary particles were found to be inherent to scenarios, i.e. materials specifications and heat flux rates. Nanoscale structure of in-flame soot was consistent with the results of thermogravimetric analysis of emitted-deposited soot. This semi-quantitative study contributes to soot observations in fire scenarios and constitutes the first application of soot probing by thermophoresis in a bench-scale fire scenario simulated by cone calorimetry. Technique shall be used in future to support emitted soot and smoke data.

烟灰是材料燃烧的降解产物之一，具有形成烟灰的条件的指纹。在这项工作中，在质量损失锥量热仪测试期间，在不同热通量情况下，从轻木芯及其三明治复合材料的燃烧燃烧中探测了火焰中的烟灰。通过热泳进行烟尘探测。进行电子显微镜以多尺度分析颗粒介质的大小。发现聚集体和初级颗粒的大小是方案固有的，即材料规格和热通量率。火焰烟尘的纳米级结构与排放沉积烟尘的热重分析结果一致。这项半定量研究有助于对火情中的烟尘进行观测，并构成了通过热泳进行烟尘探测的第一个应用，它是在锥形量热法模拟的台式火情中。将来应使用该技术来支持排放的烟灰和烟气数据。