Kinetic Locking of pH-Sensitive Complexes for Mechanically Responsive Polymer Networks.

Area of Science:

• Polymer Chemistry
• Materials Science
• Biomedical Engineering

Background:

• Developing autonomous drug delivery systems requires materials responsive to physiological pH changes.
• Tumor microenvironments and inflamed joints exhibit pH variations (4.5-7.5) suitable for targeted therapies.

Purpose of the Study:

• To engineer pH-responsive molecular interactions for dynamic polymer networks.
• To create materials with tunable mechanical and viscoelastic properties for drug delivery applications.

Main Methods:

• Utilized host-guest complexes exhibiting pH-dependent kinetic locking.
• Incorporated these complexes as dynamic crosslinks in polymer networks.
• Investigated mechanical, viscoelastic, and cargo release properties.

Main Results:

• Demonstrated pH-responsive molecular interactions via kinetic locking.
• Developed polymer networks with highly pH-tunable mechanical and viscoelastic characteristics.
• Achieved pH-dependent cargo release from the engineered materials.

Conclusions:

• pH-responsive host-guest complexes can create dynamic polymer networks.
• These materials offer a self-responsive platform for targeted drug delivery.
• The developed system enables autonomous drug release based on local pH stimuli.