Thermally Switched Release from a Nanogel-in-Microfiber Device

Area of Science:

• Materials Science
• Biomedical Engineering
• Polymer Science

Background:

• Controlled drug release systems are crucial for targeted therapies.
• Stimuli-responsive materials offer advanced solutions for on-demand delivery.
• Integrating nanogels within microfiber architectures presents unique fabrication challenges and opportunities.

Purpose of the Study:

• To develop a novel nanogel-in-microfiber device with temperature-controlled release capabilities.
• To investigate the mechanism of on-off release based on nanogel swelling and deswelling.
• To demonstrate the feasibility of a switchable release system for potential therapeutic applications.

Main Methods:

• Fabrication of a composite microfiber containing nanogels in its shell layer.
• Utilizing temperature cycling (elevation and lowering) to trigger nanogel deswelling and swelling.
• Characterization of the release kinetics in response to thermal stimuli.

Main Results:

• Successful development of a nanogel-in-microfiber device.
• Demonstration of switchable on-off release behavior triggered by temperature changes.
• Correlation between temperature fluctuations and nanogel volume changes (deswelling/swelling) controlling release.

Conclusions:

• The developed nanogel-in-microfiber device offers a promising platform for tunable, temperature-responsive release.
• The on-off release mechanism based on nanogel hydrodynamics is effective and controllable.
• This technology has potential applications in advanced drug delivery and smart material systems.