Tailored alginate and chitosan hydrogels: Structural control and functional applications via copper-based...

Area of Science:

• Materials Science
• Biomaterials Engineering
• Polymer Chemistry

Background:

• Natural polymers like alginate and chitosan offer unique properties for hydrogel development.
• Electrodeposition provides a controlled method for synthesizing functional hydrogels.
• Copper-based materials are explored for diverse applications due to their unique properties.

Purpose of the Study:

• To develop and characterize copper-based hydrogels using alginate and chitosan via electrodeposition.
• To investigate the impact of electrodeposition parameters on hydrogel structure and properties.
• To assess the suitability of these hydrogels for controlled molecular transport applications.

Main Methods:

• Synthesis of copper-based hydrogels using alginate and chitosan through electrodeposition.
• Systematic variation of electrodeposition parameters (current density, deposition time).
• Characterization of hydrogel morphology, cross-link density, mesh size, and mechanical properties.
• Diffusion studies using model molecules to evaluate permeability.
• Design of Experiments (DoE) for parameter optimization.

Main Results:

• Alginate hydrogels exhibited higher cross-link density compared to chitosan hydrogels due to carboxylate interactions with copper ions.
• Chitosan hydrogels formed a more open network structure.
• Polyvinyl alcohol (PVA) addition modulated mechanical properties and enhanced network flexibility.
• Hydrogel mesh size and cross-link density significantly influenced molecular diffusion and permeability.
• DoE approach successfully optimized parameters for reproducible and scalable hydrogel production.

Conclusions:

• Electrodeposition is an effective method for creating tunable copper-based alginate and chitosan hydrogels.
• The developed hydrogels demonstrate potential for applications requiring precise control over molecular transport.
• Optimization via DoE ensures the scalability and reproducibility of hydrogel properties for industrial and biomedical uses.