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Spray-dried chitinosans. Part I: preparation and characterization
Pankaj R Rege1, Robert J Garmise, Lawrence H Block
1Department of Medicinal Chemistry and Pharmaceutics, Duquesne University, Pittsburgh, PA 15282, USA. pankaj.rege@bms.com
International Journal of Pharmaceutics
|January 29, 2003
Summary
Drying methods significantly impact chitinsan micromeritic properties, affecting particle size and flow. Spray drying enhances characteristics like particle shape and flowability compared to tray drying.
Area of Science:
- Materials Science
- Chemical Engineering
- Biotechnology
Background:
- Chitinsans, derived from chitin, are versatile biopolymers with applications in pharmaceuticals and biomaterials.
- Understanding their physicochemical and micromeritic properties is crucial for optimizing their use in various formulations.
Purpose of the Study:
- To conduct a comprehensive physicochemical and micromeritic characterization of chitinsans.
- To evaluate the impact of different processing conditions, including N-deacetylation, depolymerization, and drying methods, on chitinsan properties.
Main Methods:
- Chitinsans were processed via N-deacetylation and depolymerization.
- Characterization included degree of N-deacetylation (DD), molecular weight (MW), pK(a), particle size, morphology, density, surface area, and flow properties.
- Drying methods compared were spray drying and tray drying.
Main Results:
- Chitinsan DD and MW varied with processing (66-89% and 2-522 kDa).
- Particle size and morphology were influenced by drying; spray-dried chitinsans were spherical with smaller sizes.
- Spray-dried chitinsans exhibited improved flow characteristics and higher specific surface areas compared to tray-dried materials.
Conclusions:
- Drying methods, specifically spray versus tray drying, significantly affect the micromeritic properties of chitinsans.
- While physicochemical properties remained largely unaffected, spray drying enhanced particle characteristics and flowability, suggesting its suitability for improved formulation development.