基于微纳米LLM-105多孔球晶炸药的构筑及其形成机制研究

LLM-105作为一种新型高能钝感炸药，有望代替BTF和HNS应用于起爆/传爆序列。我们最近研究发现，对于起爆过程，LLM-105粒径越大，受到的低压长脉冲击波作用后形成的热点尺寸也越大，起爆可靠性越高；而对于传爆过程，LLM-105比表面积越大，化学反应速率越快，化学反应去宽度越窄，传爆可靠性越高。但是，对于致密的规则晶体，粒径越小比表面积越大，因此传统的单纯从粒径大小来调控的方法不能获得起爆传爆性能皆优的LLM-105炸药。本项目基于纳米材料自组装和多级结构概念，构筑一种兼具大粒径和高比表面积的LLM-105结构——多孔球晶，揭示其形成规律，表征其理化、安全及爆轰性能。开辟可控组装其它相关微纳米含能材料多级结构的普适性新途径。

As a new type of high energy insensitive explosive, LLM-105 is expected to replace BTF and HNS to be applied in the detonation initiation and propagation sequence. In our recent research, we found that in the detonation initiation process, with the particle size of LLM-105 increased, the explosive will have a larger hot spot size formed by the low pressure and long pulse shock wave and higher initiation reliability. In the detonation propagation process, with the specific surface area of the LLM-105 increased, the explosive will have a faster chemical reaction rate, a narrower width of the chemical reaction, and a higher reliability of the explosion propagation. But, as for dense regular crystals, smaller particle size means higher specific surface area. Therefore, traditional explosive particle regulating methods can’t meet comprehensive performance of detonation initiation and propagation. This project is based on self-assembly of nanomaterials and the.concept multilevel structure. A porous spheroidal crystals based on micro-nano LLM-105 explosive will be prepared which has both big particle and high specific surface area at the same time. Its physical and chemical properties, safety and detonation performance will be characterized and its possible self-assembly mechanism will be explored. It will open up a new way of universality for controllable assembly of multilevel structures of other related nano-micron energetic materials.