Bio-inspired metal-coordinate hydrogels with programmable viscoelastic material functions controlled by longwave UV...

Area of Science:

• Soft Matter Physics
• Biomedical Materials Science
• Polymer Chemistry

Background:

• Controlling hydrogel viscoelastic properties is crucial for biomedical applications.
• Transient networks with reversible crosslinks offer tunable mechanical properties.
• Histidine:transition metal ion complexes provide precise control over hydrogel viscoelasticity.

Purpose of the Study:

• To design hydrogels with viscoelastic properties responsive to longwave UV radiation.
• To explore the use of histidine:transition metal ion complexes for stimuli-responsive hydrogels.
• To enable tunable energy dissipation and stress-relaxation in soft materials.

Main Methods:

• Fabrication of hydrogels using histidine:transition metal ion crosslinks.
• Tuning crosslink mixtures to achieve specific viscoelastic responses.
• Characterization of hydrogel viscoelastic properties before and after UV exposure.

Main Results:

• Demonstrated successful integration of UV-responsiveness into histidine:transition metal ion hydrogels.
• Showcased unique control over pre- and post-UV viscoelastic properties through crosslink selection.
• Validated the tunability of mechanical energy dissipation in response to UV light.

Conclusions:

• The developed strategy allows for precise control over stimuli-responsive viscoelastic properties in hydrogels.
• These UV-responsive hydrogels hold promise for advanced biomedical material development.
• The findings facilitate the creation of soft materials with tailored stress-relaxing and energy-dissipating capabilities.