News Resource: School of Materials Science and Engineering

Editor: News Agency of BIT

Translator: Yuan Mengfan, News Agency of BIT

High energy density material is a kind of energetic material with high density and high detonation performance. At present, HMX is the most widely used high-energy density material. Because of the inherent contradiction between energy and safety, most new high-energy density materials reported in the literature often sacrifice part of the safety of the material while obtaining higher energy density, such as the degradation of decomposition temperature, sensitivity and other properties. How to design and prepare new high-energy density materials with both high energy and high safety and higher energy level than HMX is a long-term challenge in this research field.

Based on the above problems, Professor Pang Siping from School of Materials Science and Engineering, BIT, used the synergistic strategy of multiple explosive groups to introduce stabilizing groups (C-NH₂) and energy density increasing groups (C-NO₂, N→O) into the fused ring skeleton. By using the synergistic coupling of multiple explosive groups, the structural energy density was increased and its safety was greatly improved. A new high energy density material with superior performance was designed and prepared, which was made of Bite (Bite). The related research results were published in the top international journal Nature Communications ( IF 17.694) with the title "Tri-explosive groups driven fused energetic heterogeneous cycles". This work is supported by general programs and key programs of the National Natural Science Foundation of China. The first author of this paper is Li Jie, a doctoral student in School of Materials Science and Engineering, BIT, and the corresponding authors are Professor He Chunlin and Professor Pang Siping.

Compared with HMX, the initial decomposition temperature of BITE-101 is 295 °C, and the peak decomposition temperature is 300°C, which is the highest among the CHON-type simple explosives with detonation velocity greater than 9000 m s-1 reported in the literature so far. In addition, the density of BITE-101 is 1.957 g cm-3, the detonation velocity is 9,314 m s-1, the detonation pressure is 39.3 GPa, the impact sensitivity is 18 J, and the friction sensitivity is 128 N. The comprehensive performance of Bite-101 surpasses that of traditional simple explosive HMX, and its related engineering application research work is being promoted. This study provides a new idea for improving the energy and safety of energetic materials at the same time and creating new high energy density materials.

Comparison of comprehensive properties between BITE-101 and other high energy density materials

Paper link:https://www.nature.com/articles/s41467-022-33413-7

With author's profile:

He Chunlin, a professor and doctoral supervisor at the School of Materials Science and Engineering, BIT, was selected into the youth program of "Overseas High-level Talents" in 2017. At present, he is the editorial board of Energetic Materials Frontiers, the editorial board of journal of BIT (Chinese version of natural science), the editorial board of Energetic Materials, a member of the Academic Committee of the Key Laboratory of Aerospace Chemical Power Technology, and a visiting professor at the Institute of Chemical Materials, China Academy of Engineering Physics. Long-term research on the synthesis of new high-nitrogen energetic organic compounds and the synthesis and application of new energetic compounds. In recent years, he has published more than 60 papers in top international journals, such as ACC. Chem. Res., Angew. Chem. Int. Ed., J. AM. Chem. SOC., J. Mater. Chem. A, etc., and his papers have been cited more than 1000 times.

Pang Siping, professor and doctoral supervisor of BIT, is currently the vice president of BIT. Mainly engaged in the design, synthesis and application research of energetic materials/organic functional materials. With the first author or correspondent author, he published more than 100 papers included in SCI in international journals such as JACS, Angew. Chem. He has been selected into the national talent plan leading talents in science and technology, the national candidate of "Millions of Talents Project", the young and middle-aged leading talents of the Ministry of Science and Technology and other talent plans. Served as the editorial board of such journals as Propellants, Explosives, Pyrotechnics and Energetic Materials. The research results won 1 second prize of the National Technological Invention Award (ranking 1), 1 special prize of provincial and ministerial level scientific and technological progress award (ranking 1), and won the ho leung ho lee foundation Scientific and Technological Innovation Award, the special prize of the Science and Technology Award of China Ordnance Industry Society and other awards.