A Temperature and pH Dual-Sensitive Multifunctional Polyurethane with Bacteria-Triggered Antibacterial Activity.

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Infectious Disease Research

Background:

• Developing effective antibacterial materials is crucial for combating infections.
• Stimuli-responsive polymers offer tunable antibacterial activity based on environmental cues.
• Staphylococcus aureus metabolism alters local pH, presenting an opportunity for targeted material activation.

Purpose of the Study:

• To synthesize and characterize a novel temperature/pH dual-sensitive polyurethane.
• To investigate the material's ability to respond to Staphylococcus aureus metabolic activity.
• To evaluate the antibacterial efficacy and cytocompatibility of the developed material.

Main Methods:

• Synthesis of a novel monomer with temperature and pH-sensitive groups.
• Copolymerization with polyurethane and quaternization for bactericidal activity.
• In situ monitoring of bacterial behavior and pH changes in response to the material.

Main Results:

• The modified polyurethane demonstrated dual temperature/pH sensitivity.
• The material exhibited antibacterial adhesion and bactericidal activity.
• Successful in situ activation of antibacterial properties triggered by Staphylococcus aureus metabolism was confirmed.
• Good cytocompatibility of the modified polyurethane was observed.

Conclusions:

• A novel temperature/pH dual-sensitive polyurethane was successfully developed.
• The material effectively achieves antibacterial activity in response to Staphylococcus aureus metabolic activity without external intervention.
• This design provides a new perspective for creating advanced antibacterial materials.