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Published on: January 24, 2025
RDX-based nanocomposite microparticles for significantly reduced shock sensitivity.
Hongwei Qiu1, Victor Stepanov, Anthony R Di Stasio
1Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, NJ 07030, USA. hqiu@stevens.edu
Journal of Hazardous Materials
|October 14, 2010
Summary
A new spray drying method creates Cyclotrimethylenetrinitramine (RDX) nanocomposite microparticles. These energetic materials show reduced shock sensitivity due to small crystal and void sizes, offering potential for insensitive explosives.
Area of Science:
- Materials Science
- Chemical Engineering
- Energetic Materials
Background:
- Cyclotrimethylenetrinitramine (RDX) is a common energetic material.
- Reducing the sensitivity of explosives is crucial for safety and handling.
- Nanocomposite formulations offer potential for improved energetic material properties.
Purpose of the Study:
- To develop a novel spray drying method for producing RDX-based nanocomposite microparticles.
- To characterize the morphology and composition of the RDX microparticles.
- To evaluate the shock sensitivity of energetic materials derived from these microparticles.
Main Methods:
- Spray drying was employed to synthesize RDX-based nanocomposite microparticles.
- Characterization techniques included scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and high performance liquid chromatography (HPLC).
- Microparticles were pressed into dense energetic materials for sensitivity testing.
Main Results:
- The spray drying method yielded uniformly dispersed RDX crystals (∼0.1-1 μm) within a binder matrix.
- Pressed energetic materials exhibited significantly lower shock sensitivity.
- The reduced sensitivity was correlated with small RDX crystal size and small void size (∼250 nm).
Conclusions:
- A simple and novel spray drying technique effectively produced RDX nanocomposite microparticles.
- The resulting energetic materials demonstrate reduced shock sensitivity, attributed to controlled microparticle morphology.
- This method holds promise for the development of a variety of insensitive explosive compositions.
