Development of light-degradable poly(urethane-urea) hydrogel films

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Biomedical Engineering

Background:

• Biocompatible hydrogels are crucial for biomedical applications, with responsiveness to external stimuli enhancing their utility.
• Polyurethane (PU) and polyurethane-urea (PUU) are widely used polymers for hydrogel systems.
• Stimuli-responsive hydrogels can modulate physical properties for controlled molecule delivery and tissue integration.

Purpose of the Study:

• To develop a novel, stimuli-responsive polyurethane-urea (PUU) hydrogel film.
• To incorporate a reactive oxygen species (ROS)-responsive element for controlled degradation.
• To evaluate the suitability of the developed hydrogel for biomedical applications.

Main Methods:

• Synthesis of PUU hydrogel films using polyethylene glycol (PEG) and a ROS-sensitive β-aminoacrylate bond.
• Characterization of mechanical and thermal properties.
• Assessment of water uptake, cytotoxicity, and degradation profile under ROS-inducing conditions.

Main Results:

• The developed PUU hydrogel films exhibited favorable mechanical and thermal properties.
• Good water uptake and low cytotoxicity were observed, indicating biocompatibility.
• The hydrogel films demonstrated light-degradable behavior through a ROS-mediated cleavage process, evidenced by loss of mechanical integrity.

Conclusions:

• The novel ROS-sensitive PUU hydrogel films are promising biocompatible materials for biomedical applications.
• The light-degradable profile, achieved via ROS-mediated cleavage, offers a unique mechanism for controlled material removal.
• These findings support the potential of tailored stimuli-responsive hydrogels in advanced therapeutic strategies.