Zhang Mi, Ren Hui, Cui Qingzhong, Li Hanjian, Chen Yongjin
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China.
Beijing Research Institute of Mechanical & Electrical Technology, Beijing 100081, China.
Nanomaterials (Basel). 2022 Feb 14;12(4):635. doi: 10.3390/nano12040635.
In order to improve thermal conductivity, energy performance, and combustion performance of the aluminum-containing thermite, nanocarbon materials were added to thermite. Aluminum/molybdenum and trioxide/nanocarbon materials (Al/MoO/NCM) were fabricated by electrostatic spinning technology. The Al and MoO particles of the nAl/MoO/NCM thermite are much smaller than nitrocellulose (NC); thus, the two components can be better attached to NC fibers. Results on thermal conductivity demonstrated that the addition of NCM can improve the thermal conductivity of Al/MoO, and the addition of reduced graphene oxide (RGO) has a more significant impact on thermal conductivity. Energy performance analysis results indicated that the energy performance of Al/MoO/NCM thermite spinning is the best when the value of combustion oxygen equivalent ratio (Φ) is 0.90-1.00. The combustion performance results show that the addition of NCM can significantly increase the combustion rate of thermites, and the addition of RGO improves its combustion rate the most, followed by carbon nanotubes (CNT) and nanoflake graphite (NFG) being the lowest. By changing the shape of the Al/MoO/NCM charge and the internal composition of the charge, the sensitivity of the agent can be adjusted, and the matching performance and use performance of the electric igniter can be improved.
为了提高含铝铝热剂的热导率、能量性能和燃烧性能，将纳米碳材料添加到铝热剂中。通过静电纺丝技术制备了铝/三氧化钼与纳米碳材料（Al/MoO₃/NCM）。nAl/MoO₃/NCM铝热剂中的Al和MoO₃颗粒比硝化纤维素（NC）小得多；因此，这两种组分能更好地附着在NC纤维上。热导率测试结果表明，添加NCM可提高Al/MoO₃的热导率，添加还原氧化石墨烯（RGO）对热导率的影响更为显著。能量性能分析结果表明，当燃烧氧当量比（Φ）值为0.90 - 1.00时，Al/MoO₃/NCM铝热剂纺丝的能量性能最佳。燃烧性能结果表明，添加NCM可显著提高铝热剂的燃烧速率，添加RGO对其燃烧速率的提升最大，其次是碳纳米管（CNT），纳米片状石墨（NFG）的提升最小。通过改变Al/MoO₃/NCM装药的形状和装药内部组成，可以调节药剂的感度，提高电点火器的匹配性能和使用性能。
