Chitosan and alginate polyelectrolyte complex membranes and their properties for wound dressing application

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Drug Delivery Systems

Background:

• Chitosan and alginate are biocompatible polymers with potential in biomedical applications.
• Developing effective wound dressings requires materials with specific physical and drug release properties.

Purpose of the Study:

• To investigate the characteristics and drug release of chitosan-alginate membranes.
• To evaluate the potential of these membranes as wound dressings or for controlled drug release.

Main Methods:

• Casting/solvent evaporation technique was used to prepare chitosan-alginate membranes.
• Silver sulfadiazine was incorporated as a model drug at various concentrations and compositions.
• Membrane properties including viscosity, water uptake, WVTR, breaking strength, and elongation were analyzed.

Main Results:

• Polyblend solution viscosity peaked at a 1:1 chitosan:alginate ratio.
• Membranes displayed pH- and ionic strength-dependent water uptake.
• WVTR ranged from 442 to 618 g/m(2)/day.
• Maximum dry membrane breaking strength was 52.16 MPa, and wet membrane breaking elongation was 46.28%.
• Silver sulfadiazine release was fastest at 50% alginate content.

Conclusions:

• Chitosan-alginate poly(ethylene terephthalate) (PEC) membranes possess suitable physical properties for biomedical applications.
• These membranes show promise for use as wound dressings or in controlled drug release systems.