Crystallographic textures and morphologies of solution cast Ibuprofen composite films at solid surfaces

Area of Science:

• Materials Science
• Pharmaceutical Sciences
• Drug Delivery

Background:

• Thin composite layers offer advantages for transdermal, buccal, and sublingual drug delivery patches.
• Understanding matrix material impact is crucial for optimizing film properties and drug release profiles.

Purpose of the Study:

• To investigate the influence of matrix materials (polystyrene, methyl cellulose, hydroxyl ethyl cellulose) on the film-forming properties of ibuprofen-matrix composite films.
• To evaluate the effect of preparation methods (spin coating, drop casting) and ibuprofen-to-matrix ratio on film characteristics.
• To compare the dissolution properties and drug release rates of composite films based on different matrix materials.

Main Methods:

• Preparation of ibuprofen-matrix composite films using spin coating and drop casting techniques.
• Characterization of film properties using X-ray diffraction (XRD) and atomic force microscopy (AFM).
• Analysis of drug dissolution profiles and release kinetics for various composite formulations.

Main Results:

• Spin coating induced preferred (100) textures, while drop casting resulted in powder-like behavior.
• Film morphology was primarily influenced by ibuprofen concentration, not the preparation method.
• Methyl cellulose matrices exhibited a two-fold faster zero-order release of ibuprofen compared to polystyrene.
• Hydroxyl ethyl cellulose showed the slowest release, limited by diffusion through a swollen matrix.

Conclusions:

• Matrix material significantly impacts drug release kinetics, with methyl cellulose offering faster release than polystyrene or hydroxyl ethyl cellulose.
• Ibuprofen crystallization and film formation are minimally affected by matrix selection, unlike dissolution properties.
• The findings suggest that careful selection of matrix materials can optimize composite layers for specific drug delivery applications.