Carbon Nanotubes as Modifying Agent of Energetic Compositions: More Safety with Unaltered Applicability
- Paper number
IAC-20,C2,IP,6,x55991
- Author
Mr. Zhenhao Mi, China, The 41st Institute of the Fourth Academy, China Aerospace Science and Technology Corporation (CASC)
- Coauthor
Mr. Jiangyan Lv, China, The 41st Institute of the Fourth Academy, China Aerospace Science and Technology Corporation (CASC)
- Coauthor
Mrs. Jingxuan Li, China, Xi'an Institute of Aerospace Information
- Coauthor
Prof. Jianru Wang, China, The 41st Institute of the Fourth Academy, China Aerospace Science and Technology Corporation (CASC)
- Year
2020
- Abstract
Carbon nanotubes (CNTs) have turned into sparkling due to their remarkable mechanical properties as well as its electrical and thermal conductivities. Not limited to the replacement of traditional carbon materials in propellant, we also pay close attention to the strong modifying function of nanostructure materials. Two kinds of energetic complex were modified by CNTs. One is a certain ignition mixture, while the other is detonating agent, lead styphnate (LTNR). 1) CNTs and ignition mixture were weighed and dispersed by ultrasonic in anhydrous ethanol for 60 min, then dried in 80 ℃ water bath; 2) CNTs and LTNR were weighed and mixed, then sieved for several times in order that the two composition were mixed uniformly, dried in 60 ℃ oil bath. SEM scan, thermal analysis and sensitivity testing were determined respectively and gratifying results were obtained. SEM photos indicated that the CNTs dispersed well-proportionally in aiming complex. Non-isothermal kinetic and thermodynamic parameters were precisely evaluated by two kinetic equations, Ozawa-Doyle and Kissinger. With the additive of CNTs, the activation energy of LTNR decomposition rises obviously from about 181 kJ/mol up to 220 kJ/mol, which is a truly advantage for energetic materials. The sensitivity tests of impact, friction, flame and static electric charge of topic complex were performed according to Chinese military standard GJB 5891.22—2006, GJB 5891.24—2006, GJB 5891.25—2006, GJB 5891.27—2006, respectively. For flame sensitivity of ignition mixture, different changes occurred on different complex. But in general, with only 1\% CNTs added in the mixture, the flame sensitivity was decreased from 23.9 cm to 11.9 cm, which means the mixture become less sensitive. When the percentage raised up to 3\%, almost equal sensitivities were obtained from mixtures with and without CNTs. While 4\% and above-over, it showed a more sensitive performance compared with original mixture. For all kinds of sensitivity of LTNR and CNTs/LTNR, the experimental data indicated that additive CNTs in the system could decrease the impact sensitivity, friction sensitivity and static electric charge sensitivity evidently, while flame sensitivity almost stayed the same with LTNR itself. In allusion to the above-mentioned phenomenon, detailed theory was discussed in our paper. All we done have led to a conclusion: Carbon nanotubes could make a tremendous progress in modifying the practical performances of energetic materials such as pyrotechnic, explosives and propellant.
- Abstract document
- Manuscript document
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