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Multifunctional and Transformable 'Clickable' Hydrogel Coatings on Titanium Surfaces: From Protein Immobilization to
Tugce Nihal Gevrek1, Aysun Degirmenci2, Rana Sanyal1,2
1Department of Chemistry, Bogazici University, Bebek, Istanbul 34342, Turkey.
Polymers
|May 30, 2020
Summary
Researchers developed versatile hydrogel coatings for titanium surfaces, enabling easy attachment of bioactive molecules. These advanced coatings offer precise control for biomedical applications, enhancing titanium-based material functionality.
Area of Science:
- Biomaterials Science
- Surface Chemistry
- Polymer Chemistry
Background:
- Titanium-based materials are widely used in biomedical applications.
- Modifying titanium interfaces with functional coatings is crucial for enhanced performance.
- Existing methods for hydrogel functionalization can be limited in scope and efficiency.
Purpose of the Study:
- To fabricate multifunctional and transformable hydrogel coatings on titanium surfaces.
- To develop a versatile platform for facile surface functionalization using click chemistry.
- To demonstrate controlled immobilization of bioactive molecules for biomedical applications.
Main Methods:
- Fabrication of biocompatible hydrogel layers with furan-protected maleimide groups on titanium.
- Thermal treatment to unmask thiol-reactive maleimide groups.
- Utilizing thiol-maleimide, Diels-Alder, and thiol-ene click reactions for functionalization.
- Photo-initiated thiol-ene click reaction for spatial immobilization of fluorescent dyes (BODIPY-SH).
- Controlled functionalization using biotin-tetrazine chemistry and labeled ExtrAvidin.
Main Results:
- Successfully created multi-clickable hydrogel coatings on titanium surfaces.
- Demonstrated facile and mild functionalization via multiple click chemistry pathways.
- Achieved spatially controlled immobilization of a fluorescent dye using photo-initiated reactions.
- Showcased controllable surface functionalization by varying attachment strategies.
Conclusions:
- The developed hydrogel coatings offer a versatile and practical platform for modifying titanium interfaces.
- The multi-click functionality allows for diverse and controlled attachment of bioactive entities.
- These advanced hydrogel coatings hold significant potential for various biomedical applications involving titanium-based materials.
