扫描电镜能谱辨识纸质材料燃烧灰烬的研究

Identification of Paper Material Ashes by SEM-EDAX

利用扫描电镜能谱仪,分析了常见纸质材料——静电复印纸、纸巾纸、报纸和瓦楞纸板等燃烧后灰烬颗粒的形貌特征、成分及组成比例,分析了水分、温度对灰烬颗粒形貌的影响。结果表明,以上4种纸质材料的灰烬颗粒形貌明显不同。静电复印纸灰烬颗粒外形单一,钙元素含量远高于其他元素;纸巾纸灰烬中纤维体边沿上有呈圆点状或细条状元机物;报纸灰烬中纤维状物质形多样;瓦楞纸板灰烬中含有较多的奇特形状颗粒,且氮元素含量高。

Combustion ashes play important roles in investigating causes of fire and solving cases. Research on combustion ashes was rare in the past because of the backwardness of technical approaches. With the SEM-EDAX analysis technique, it becomes possible to study the kind of combustible material through ashes. The morphological characteristics of paper material ash particles, their elementary composition and percentage can be analyzed by SEM-EDAX, and then the kind of ashes can be determined. Therefore, paper materials such as printing paper, tissue paper, newspaper, corrugated paper etc. can be identified.