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Reports from South Dakota School of Mines and Technology Describe Recent Advances in Pyrotechnics (Preparation and Characterization of Aqueous...

July 22, 2014



Reports from South Dakota School of Mines and Technology Describe Recent Advances in Pyrotechnics (Preparation and Characterization of Aqueous Nanothermite Inks for Direct Deposition on SCB Initiators)

By a News Reporter-Staff News Editor at Journal of Technology -- Research findings on Pyrotechnics are discussed in a new report. According to news reporting originating from Rapid City, South Dakota, by VerticalNews correspondents, research stated, "Nanothermites are a promising replacement energetic for many devices but their use has been limited by high sensitivity during processing, hazardous processing solvents, and time consuming deposition. Incorporating processing and deposition into a single step, especially if no organic solvents were used, could allow nanothermites to be applied safely in a wider range of applications."

Our news editors obtained a quote from the research from the South Dakota School of Mines and Technology, "This work reports on the performance and characterization of direct-deposited water processed nanothermite inks on semiconductor bridge (SCB) initiators. Specifically, it investigates the replacement of nanothermites processed by resonant mixing (Resodyn LabRAM) in the solvent N,N-dimethylformamide (DMF) with nanothermites processed in water. Processing safety and mixture performance were then characterized. It was found that water processed nanothermites were stable for up to 480 min in a water bath at 50 degrees C only if both metal and metal oxide particles were coated with palmitic acid. In addition, water processed nanothermites were found to have better mixing intimacy, which resulted in better performance than nanothermite processed in DMF. Direct deposition of water processed nanothermites also mitigates electrostatic discharge (ESD) sensitivity, while the material remains wetted, improving processing safety dramatically. For the system investigated, it was found that processing at a solids loading of 30 vol.% resulted in a high density, high performance ink that was deposited directly onto the SCBs. This resulted in a 25% reduction in the all fire threshold over traditional energetics."

According to the news editors, the research concluded: "This mixing approach uses an environmentally friendly mixing medium, can result in a higher density final material, and allows safe one-step mixing and deposition."

For more information on this research see: Preparation and Characterization of Aqueous Nanothermite Inks for Direct Deposition on SCB Initiators. Propellants Explosives Pyrotechnics, 2014;39(3):463-470. Propellants Explosives Pyrotechnics can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany.

The news editors report that additional information may be obtained by contacting R.R. Nellums, South Dakota Sch Mines & Technol, Dept. of Chem & Biol Engn, Rapid City, SD 57701, United States. Additional authors for this research include S.F. Son and L.J. Groven.

Keywords for this news article include: Rapid City, South Dakota, Pyrotechnics, United States, North and Central America

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Source: Journal of Technology


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