Thermal reactions of nitrocellulose-encapsulated Al/CuO nanoenergetic materials fabricated in the gas and liquid phases
| Autor: | Soo Hyung Kim, Myung Hoon Cho, Ji Hoon Kim, Ho Sung Kim, Jeong Keun Cha, Hong-Min Shim |
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| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Materials science Precipitation (chemistry) Liquid phase 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Gas phase Aerosol Matrix (chemical analysis) chemistry.chemical_compound chemistry Chemical engineering Thermal General Materials Science 0210 nano-technology Nitrocellulose |
| Zdroj: | Materials Chemistry and Physics. 238:121955 |
| ISSN: | 0254-0584 |
| DOI: | 10.1016/j.matchemphys.2019.121955 |
| Popis: | We examined the effect of polymer encapsulation on the insensitivity and thermal reactions of Al and CuO-based nanoenergetic materials (nEMs). The nEMs were encapsulated by nitrocellulose (NC) polymer using aerosol and solution drying processes for comparison. Severe aggregation and precipitation of Al/CuO reactants in the NC matrix were made in the liquid phase during the drying process so that the thermal reactions of the resulting Al/CuO/NC composites was unstable. However, the rapid aerosol drying process in the gas phase resulted in the formation of uniformly mixed NC-encapsulated Al/CuO composites. The NC content in the Al/CuO composites fabricated in the gas phase strongly affected the thermal reactions by perturbing thermochemical interactions between the Al and CuO reactants. Meanwhile, the insensitivity of Al/CuO composites gradually increased with increasing NC content. Therefore, the aerosol drying process in the gas phase is suggested as a viable and effective method to generate polymer-encapsulated homogeneously mixed nEMs with enhanced insensitivity and thermal reaction properties. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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