A novel hydrogel with self-healing property and bactericidal activity

Area of Science:

• Materials Science
• Biomedical Engineering
• Polymer Chemistry

Background:

• Advanced wound dressings require self-healing and antimicrobial capabilities for enhanced efficacy.
• Dynamic covalent bonds offer a promising strategy for developing self-healing hydrogels.
• The integration of specific functional groups can modulate hydrogel properties for improved performance.

Purpose of the Study:

• To design and synthesize a novel self-healing hydrogel dressing with bactericidal activity.
• To investigate the self-healing mechanism based on dynamic B-O-B bonds.
• To evaluate the hydrogel's potential for accelerating wound healing.

Main Methods:

• Synthesis of a poly (4-vinyl benzene boronic acid-co-N-vinyl pyrrolidone-co-1-vinyl-3-butylimidazolium bromide) hydrogel (VNV hydrogel).
• Characterization of the hydrogel's self-healing mechanism via dynamic B-O-B bond formation and reformation.
• Assessment of hydrogel properties including water absorption and molecular migration.
• Evaluation of antibacterial activity against E. coli, S. aureus, and C. albicans.
• In vivo study on rat wound models to assess wound healing acceleration.

Main Results:

• The VNV hydrogel exhibits efficient self-healing properties attributed to reversible B-O-B bonds.
• Hydrophilic groups enhanced porous structure, water absorption, and molecular migration, improving self-healing.
• The VNV hydrogel demonstrated significant antibacterial activity against tested pathogens.
• Application of the VNV hydrogel dressing accelerated wound healing in a rat model.

Conclusions:

• The developed VNV hydrogel dressing possesses excellent self-healing and bactericidal properties.
• The hydrogel's unique properties make it a promising candidate for advanced wound dressing applications.
• Further research into VNV hydrogel dressings could lead to improved wound care solutions.