Preparation and growth mechanism of micro spherical ammonium dinitramide crystal based on ultrasound-assisted solvent-antisolvent method
| Autor: | Jinghui Hu, Jingjing Li, Li Gong, Tao Zeng, Weiqiang Tang, Rongjie Yang, Zhenhui Liu |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Recrystallization (geology) Ammonium dinitramide Acoustics and Ultrasonics QC221-246 Crystal growth Inorganic Chemistry Crystal chemistry.chemical_compound Differential scanning calorimetry Chemical Engineering (miscellaneous) Environmental Chemistry Radiology Nuclear Medicine and imaging Original Research Article Crystal morphology Solvent-antisolvent QD1-999 ComputingMethodologies_COMPUTERGRAPHICS Supersaturation Organic Chemistry Acoustics. Sound Spiral growth model Recrystallization Chemistry chemistry Chemical engineering Melting point Particle size |
| Zdroj: | Ultrasonics Sonochemistry, Vol 78, Iss, Pp 105716-(2021) Ultrasonics Sonochemistry |
| ISSN: | 1350-4177 |
| Popis: | Graphical abstract Highlights • Preparation technology of spherical ammonium dinitramide (ADN) crystals. • An ultrasound-assisted solvent-antisolvent method. • Influences of experimental parameters on morphology and particle size of ADN. • Predicted ADN crystal morphologies by growth and equilibrium morphology methods. • Growth mechanisms of spherical ADN crystal change with supersaturation. Micro-sized spherical ammonium dinitramide (ADN) crystals are successfully prepared by a facile ultrasound-assisted solvent-antisolvent recrystallization method without introducing any additives. The influences of the volume ratio of solvent to antisolvent, the antisolvent temperature and the ultrasound power on the micro-morphologies and properties of ADN crystals are studied systematically. The changes of morphology, particle size, crystal structure and melting point of the ADN crystals are characterized through scanning electron microscopy (SEM), laser particle size analyzer (LPSA), X-ray diffraction (XRD) and differential scanning calorimetry (DSC), respectively. The results show that the optimal experimental parameters for the ADN crystal of spherical morphology are as follows: the volume ratio of solvent to antisolvent is 1:50, the antisolvent temperature is 20 ℃, and the ultrasound power is 70 W. The predicted hexagonal-flake and spherical morphologies for the ADN are close to the experimental morphologies. The growth mechanism of the spherical ADN crystal changes with supersaturation of the ADN solution. As the degree of supersaturation increases, the growth models of the spherical ADN change from the spiral growth to the rough growth, and the morphologies of ADN change from the large-sized ADN ball to the small-sized ADN ball. |
| Databáze: | OpenAIRE |
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