| Autor: |
Saleh A, Ismael S, Tantawy H, Abdelkhalek Sm, Yehia M, Elbasuney S |
| Rok vydání: |
2021 |
| Předmět: |
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| DOI: |
10.21203/rs.3.rs-519875/v1 |
| Popis: |
HMX is considered one of the most powerful energetic materials; however HMX experiences low sensitivity. Cobalt oxide particles can expose active surface sites; low coordination surface oxygen has remarkable capability to act as electron donor to electron deficient explosive materials. Furthermore, cobalt oxide hydrous surface could release active ȮH radicals that could attack HMX heterocyclic ring. Consequently cobalt oxide can experience potential catalyzing ability. Highly crystalline, mono-dispersed cobalt oxide nanoparticles (NPs) of 20 nm were fabricated using hydrothermal processing. Cobalt oxide demonstrated stable colloidal particles; these particles were re-dispersed in organic solvent and integrated into HMX matrix via co-precipitation technique. Enhanced particle dispersion into energetic matrix was verified using SEM. The effectiveness of cobalt oxide on HMX decomposition was evaluated using DSC and TGA. Cobalt oxide NPs demonstrated superior catalytic activity; with an increase in HMX decomposition enthalpy by 53 % using DSC. The main decomposition temperature was decreased by 10 0C. Cobalt oxide NPs offered enhanced reaction propagation index by 56 %; additionally HMX activation energy was decreased by 41 % and 37 % using Kissinger and KAS models respectively. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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