Zwitterionic polyurethane hydrogels derived from carboxybetaine-functionalized diols

Area of Science:

• Polymer Chemistry
• Materials Science
• Biomaterials

Background:

• Polyurethane hydrogels are versatile biomaterials.
• Controlling water uptake in hydrogels is crucial for applications.
• Zwitterionic materials offer enhanced hydration properties.

Purpose of the Study:

• To synthesize novel zwitterionic polyurethane hydrogels.
• To achieve tunable water uptake properties.
• To investigate the relationship between material structure and hydration.

Main Methods:

• Polymerization of protected carboxybetaine-functionalized diols with polyisocyanate oligomers.
• Post-polymerization hydrolysis to establish zwitterionic functionalities.
• Control over diol precursor structure and hydrolysis conditions.

Main Results:

• Successful synthesis of zwitterionic polyurethane hydrogels.
• Achieved tunable water uptake ranging from 24% to 250%.
• Demonstrated control over hydration by modifying diol structure and hydrolysis.

Conclusions:

• Zwitterionic polyurethane hydrogels with tunable water uptake were synthesized.
• Material hydration can be precisely controlled.
• These hydrogels show promise for applications requiring specific water absorption characteristics.