Tunable continuous production of RDX from microns to nanoscale using polymeric additives
| Autor: | Fabien Schnell, Florent Pessina, Denis Spitzer |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
General Chemical Engineering Nucleation 02 engineering and technology Polyethylene glycol 01 natural sciences Industrial and Manufacturing Engineering law.invention chemistry.chemical_compound law 0103 physical sciences medicine Environmental Chemistry Organic chemistry Thermal stability Crystallization chemistry.chemical_classification 010304 chemical physics Polyvinylpyrrolidone General Chemistry Polymer 021001 nanoscience & nanotechnology chemistry Chemical engineering Particle size 0210 nano-technology Dispersion (chemistry) medicine.drug |
| Zdroj: | Chemical Engineering Journal. 291:12-19 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2016.01.083 |
| Popis: | The versatility of the Spray Flash Evaporation (SFE) has been extended within the introduction of solid and viscous polymers in solvent. Those polymers are food additives namely polyvinylpyrrolidone (PVP) and polyethylene glycol (PEG); both additives were successfully used to control crystallization steps, thus the particle size and shape of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX). The role of PVP as nucleation and growth inhibitor allowed the formation of spherical RDX particles with an average size of 160 nm; we found that only 1 wt% of PVP per gramme of RDX is needed to reach that size and further addition reduces only the dispersion. The PEG triggered the nucleation of RDX with a low rate and so promoted the growth of RDX particles up to 5 μ m. Despite a lower thermal stability, the synthesized energetic composites exhibit reduced sensitives towards electrostatic discharge, friction and impact. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect