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Preparation of sub-micron nitrocellulose particles for improved combustion behavior
1Department of Chemical Engineering, Texas Tech University, 6th and Canton, Lubbock, TX 79409, USA.
Journal of Hazardous Materials
|February 11, 2014
Summary
Researchers developed a new method for creating spherical sub-micron nitrocellulose particles. These particles exhibit enhanced combustion properties, including a significantly increased burn rate and more complete burning compared to bulk material.
Area of Science:
- Materials Science
- Chemical Engineering
Background:
- Nitrocellulose is a key energetic material.
- Controlling particle morphology is crucial for optimizing performance.
Purpose of the Study:
- To develop a novel method for synthesizing spherical sub-micron nitrocellulose particles.
- To investigate the influence of synthesis parameters on particle morphology and size.
- To characterize the thermal properties and combustion behavior of the synthesized particles.
Main Methods:
- Sub-micron nitrocellulose particles were prepared using a novel solvent-based method.
- Dimethylformamide (DMF) at 5°C was used as the solvent and growth temperature.
- Particle size was controlled by adjusting reactant concentration.
- Differential scanning calorimetry (DSC) and digital high-speed photography were employed for characterization.
Main Results:
- Reproducible synthesis of spherical nitrocellulose particles with diameters ranging from 500nm to 2 microns.
- Particle size was tunable via concentration (5-10mg/ml for 500nm, 30mg/ml for 2 microns).
- Sub-micron particles demonstrated lower decomposition activation energy, a 350% increase in burn rate, and more complete combustion compared to bulk nitrocellulose.
Conclusions:
- A controllable method for producing spherical sub-micron nitrocellulose particles was established.
- These particles exhibit significantly improved combustion characteristics.
- The findings offer potential for enhanced energetic material formulations.
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