2024年8月常州大学低碳清洁能源与安全高效燃烧科研团队孙运兰教授课题组陈九玉博士在Fuel期刊发表了题为“Study of polyethylene glycol modified boron particles and their combustion characteristics”的研究论文。

硼具有高体积热值和重量热值，在含能材料中具有良好的实际应用前景。然而，B表面的氧化膜是其作为燃料发挥自身优势的最大障碍；如何消除或破坏B表面的氧化膜是当前迫切需要解决的问题。本文采用平均分子量为2000的含氧有机物聚乙二醇(PEG)对微米级B颗粒进行改性，通过热分析、氧弹分析、CO₂激光点火实验、光谱分析和对不同燃烧条件下获得的燃烧产物分析等研究了PEG对B的点火与燃烧性能影响。结果表明，适量PEG改性可以降低B的着火温度、增强氧化、改善燃烧强度以及提高放热。此外，PEG改性还可以改善B颗粒的团聚行为。通过分析，PEG改善B燃烧行为主要源于PEG热分解产物与B间的相互作用及对硼氧化物的破坏与消除。PEG热分解产物H₂O(g)与硼氧化物反应生成气相HBO₂（反应式：H₂O(g) + B₂O₃(l或g)→2HBO₂(g)），上述反应能够去除B颗粒表面的B₂O₃层，从而促进硼的点火燃烧。以上结果表明，PEG改性是促进B点火和燃烧的有效策略。

该论文第一作者是陈九玉博士，常州大学孙运兰教授和朱宝忠教授为通讯作者，常州大学是第一通讯单位。该研究成果得到了国家自然科学基金面上项目资助！

英文摘要：

 Boron (B) has a good practical application prospect in energetic materials due to its high volumetric and gravimetric heating values. However, the challenge of incomplete combustion inhibited its further application because of the existence of surface boron oxides. Herein, polyethylene glycol (PEG), a kind of oxygen-containing organic matter with an average molecular weight of 2000, was used to modify the B particles at a micron level to improve the combustion performance. The effect of PEG contents on the thermal behavior, heat of combustion, ignition and combustion performance, as well as the combustion intensity of boron powder, was studied. The results showed that the appropriate amount of PEG modification could reduce the ignition temperature of boron powder, increase the degree of oxidation, improve the combustion intensity and heat release. Additionally, the agglomeration behavior of B particles could be alleviated but the improvement diminished with the increase of PEG contents. These results revealed that PEG modification was an efficient strategy to facilitate boron ignition and combustion.

图文摘要：

原文链接：https://doi.org/10.1016/j.fuel.2024.132681

撰稿：陈九玉博士     审核：朱宝忠