Broad-spectrum antimicrobial polycarbonate hydrogels with fast degradability

Area of Science:

• Polymer Chemistry
• Biomaterials Science
• Antimicrobial Materials

Background:

• Developing effective antimicrobial materials is crucial for preventing infections associated with medical devices and wounds.
• Polycarbonate hydrogels offer tunable properties for various biomedical applications.
• Incorporating antimicrobial functionalities into hydrogel scaffolds can enhance their therapeutic potential.

Purpose of the Study:

• To synthesize and characterize a novel family of broad-spectrum antimicrobial polycarbonate hydrogels.
• To investigate the antimicrobial efficacy and degradation properties of these hydrogels.
• To evaluate their suitability for wound healing and as implantable biomaterials.

Main Methods:

• Synthesis of tertiary amine-containing cyclic carbonates.
• Organocatalyzed ring-opening polymerization to form polycarbonate hydrogels.
• Quaternization of hydrogels using methyl iodide to impart antimicrobial activity.
• In vitro antimicrobial testing against Gram-positive bacteria, Gram-negative bacteria, and fungi.
• Degradation studies at room temperature.

Main Results:

• Stable polycarbonate hydrogels were formed with bifunctional monomer concentrations ≥ 12 mol %.
• Quaternized hydrogels demonstrated broad-spectrum antimicrobial activity against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and Candida albicans.
• Non-quaternized hydrogels exhibited negligible antimicrobial activity.
• The hydrogels exhibited rapid degradation within 4-6 days at room temperature.

Conclusions:

• A new class of broad-spectrum antimicrobial polycarbonate hydrogels has been successfully developed.
• The quaternized hydrogels show significant potential for combating microbial infections.
• Their fast degradation profile makes them highly suitable for applications in wound healing and as implantable biomaterials.