十氢十硼酸双四乙基铵/纳米铝复合物的制备及其性能

为了改善硼氢燃料的能量输出特性,提高其作为推进剂及火炸药添加剂的燃烧效率,使用溶剂-非溶剂法制备了十氢十硼酸双四乙基铵/纳米铝含能复合物,并对其表面形貌、比表面积、热性能及气体分解产物进行了研究。结果表明,使用溶剂-非溶剂方法可制备具有良好分散性的十氢十硼酸双四乙基铵/纳米铝复合物,并能极大的减少纳米铝的团聚。复合物的比表面积为7. 06 m~2/g,远大于混合物的0. 20 m~2/g。BHN-10/纳米铝复合物在分解过程中可形成一种熔融分解型的中间产物,分解过程分为两个阶段,两阶段的分解温度分别为285. 1℃和304. 4℃,在形成BHN-10/纳米铝复合物后分解温度提前,第一分解放热峰提前到262. 0℃,第二分解放热峰提前到298. 8℃。分解气体产物主要为乙烯、乙烷、氨气和氢气等具有高热值的可燃性小分子气体。

Preparation and Properties of [(C2H5)4N]2B10H10/nano-aluminum Composite

In order to optimize the energy output and improve the energy utilization efficiency of the boron-hydrogen fuel and improve its combustion efficiency as a propellant and explosive additive, a solvent-non-solvent method was used to prepare the (C2H5)4N]2B10H10/nano-aluminum (BHN-10/nano-aluminum) composite. The morphology, specific surface area and thermal properties of BHN-10/nano-aluminum composite were investigated. The results show that the solvent-non-solvent method can prepare composite with good dispersibility and greatly reduce the agglomeration of nano-aluminum powder. The specific surface area of the composite was 7.06 m2·g-1, which was much larger than 0.20 m2·g-1 of the BHN-10 and nano-aluminum mixture. BHN-10/nano aluminum composite can form a melt-decomposing intermediate during decomposition process. The decomposition process is divided into two stages. The decomposition temperature of the first and the second stages is 285.1°C and 304.4°C, respectively. After the formation of BHN-10/nano-aluminum composite, the decomposition temperature was advanced. The first exothermic peak was advanced to 262.0°C and the second exothermic peak was advanced to 298.8°C. The decomposed gaseous products are mainly flammable small molecule gases having high calorific value such as ethylene, ethane, ammonia and hydrogen.