Structured Hydrogel Particles With Nanofabricated Interfaces via Controlled Oxygen Inhibition

Area of Science:

• Biomaterials Science
• Microfluidics
• Polymer Chemistry

Background:

• Hydrogels are engineered for biomedical uses like drug delivery and tissue engineering.
• Controlling hydrogel microparticle interfacial properties is crucial for function.
• Existing methods lack precise control over particle architecture.

Purpose of the Study:

• To demonstrate precise control over hydrogel microparticle interfacial properties.
• To engineer particles with tunable radial crosslinking density gradients.
• To explore the impact of structural tunability on function.

Main Methods:

• Utilized droplet microfluidics for particle fabrication.
• Employed oxygen-inhibited photopolymerization for precise crosslinking control.
• Created spherical particles with radial crosslinking density gradients.

Main Results:

• Achieved extraordinary precision in tuning interfacial properties.
• Demonstrated predictable radial crosslinking density gradients.
• Showcased structural tenability impacting macromolecule encapsulation and release.

Conclusions:

• Engineered hydrogel microparticles offer precise control over network properties.
• Tunable interfacial properties dictate release profiles and functional group availability.
• This platform enables advanced applications in biosensing and drug delivery.