Influence of Ar plasma treatment on the wetting behavior of pharmaceutical powders

Perspectives on the Wetting of Solids in Pharmaceutical Systems

PURPOSE

The ability of water and aqueous solutions to wet relatively nonpolar pharmaceutical solids during the processing and administration of solid dosage forms is an important part of development.

RESULTS

Various factors, both fundamental and technological, which are important to wettability are reviewed and analyzed. Initially, the ideal thermodynamic importance of liquid surface tension and solid surface energetics, determined by the contact angle and the polarity of the solid surface, are established. Then, emphasis is placed on various factors that change the surface energetics due to crystal defects, polymorphism, varying Miller Indices, crystal habit, amorphous structure, variable surface concentration of components in a formulation mixture, surface roughness, and complex pore structure. Case studies cover single component systems (APIs and excipients), binary mixtures (amorphous solid dispersions and physical mixtures), multicomponent systems (granules and tablets), as well as disintegration and dissolution of solid oral dosage forms.

CONCLUSIONS

This perspective and analysis indicates the primary importance of understanding and modifying solid surface energetics, surface chemical and physical heterogeneities, and pore structure to promote wettability in pharmaceutical systems.

Development, preparation and characterization of chitosan, gelatin and heparin membranes for biomedical applications

With the rising in life expectancy and the consequent population aging, degenerative chronic diseases have been figured as the major cause of morbidity and mortality in the world. It is believed that the production of a polymeric matrix composed of chitosan and gelatin may be an alternative to obtain a carrier base of heparin, with the prospective objective of applying these materials as an alternative to the conventional therapeutic resources biomedical. Based on the results, it can be concluded that the interaction between chitosan, gelatin, and heparin demonstrating a satisfactory result by the methodologies that were applied, making the study hypothesis concrete., certifying the use of a methodology for including heparin in a biodegradable polymeric base. Thus, expanding the alternatives for possible alternatives to the conventional therapeutic resources of vascular diseases with the application of the developed materials.