Antifouling and antimicrobial cobaltocenium-containing metallopolymer double-network hydrogels

Area of Science:

• Materials Science
• Polymer Chemistry
• Biomaterials Engineering

Background:

• Double-network hydrogels exhibit superior mechanical properties compared to single-network hydrogels.
• Functional integration into hydrogel networks expands their application scope.
• Metallopolymer hydrogels offer unique properties due to metal ion incorporation.

Purpose of the Study:

• To prepare and characterize novel double-network metallopolymer hydrogels.
• To investigate the hydration, mechanical, antifouling, and antimicrobial properties of these hydrogels.
• To explore the role of cobaltocenium cations in the hydrogel's functionality.

Main Methods:

• Preparation of double-network hydrogels using cationic cobaltocenium polyelectrolytes and polyacrylamide via radical polymerization.
• Incorporation of antibiotics through ion-complexation with metal cations.
• Evaluation of mechanical strength, hydration, protein adsorption (antifouling), and bacterial inhibition (antimicrobial activity).

Main Results:

• The synthesized hydrogels demonstrated significantly enhanced hydration and robust mechanical strength compared to polyacrylamide hydrogels.
• Cationic metallopolymer hydrogels showed strong antifouling capabilities against oppositely charged proteins.
• Antibiotic-loaded hydrogels exhibited synergistic antibacterial effects and enhanced bacterial antifouling due to cobaltocenium cation complexation.

Conclusions:

• Double-network metallopolymer hydrogels offer a promising platform for advanced functional materials.
• The combination of mechanical robustness, hydration, antifouling, and antimicrobial properties is achieved through the designed network structure and ion complexation.
• These hydrogels show potential for applications requiring biocompatibility and infection resistance.