Preparation of spray dried submicron particles: Part A - Particle generation by aerosol conditioning
| Autor: | Peter Walzel, Ramona Strob, Gerhard Schaldach, Markus Thommes, Adrian Dobrowolski |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Mass flow Chemistry Pharmaceutical Nozzle Static Electricity Pharmaceutical Science Nanoparticle Separator (oil production) 02 engineering and technology 010402 general chemistry complex mixtures 01 natural sciences Technology Pharmaceutical Mannitol Desiccation Particle Size Dissolution Aerosols Povidone 021001 nanoscience & nanotechnology 0104 chemical sciences Aerosol Chemical engineering Spray drying Particle size 0210 nano-technology |
| Zdroj: | International journal of pharmaceutics. 548(1) |
| ISSN: | 1873-3476 |
| Popis: | The preparation of submicron-sized particles is relevant in chemical, food and pharmaceutical applications. In pharmaceutics, spray dried submicron-sized particles (0.1–1 µm) can increase the dissolution rate as well as the solubility of poorly water-soluble drugs. Since the particle size during spray drying is mainly influenced by the droplet size, the preparation of uniform droplets smaller than 3 µm is of particular interest. In this work, a two-fluid nozzle was combined with a cyclone droplet separator. Droplets larger than the cut-off size were separated with a cyclone droplet separator and returned to the liquid feed. The aerosol at the outlet of the droplet separator was subsequently dried. The drop size of the conditioned aerosol was small, d 50 , 3 = 2 µm, and independent of the liquid-to-gas mass flow ratio and the viscosity of the liquid feed. Thus it only depended on the characteristics of the separator. Finally, the dried particles were spherical in shape and in the submicron-sized range. |
| Databáze: | OpenAIRE |
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