Sprayed Aqueous Microdroplets for Spontaneous Synthesis of Functional Microgels

Area of Science:

• Macromolecular Science
• Microdroplet Chemistry
• Polymer Colloids Synthesis

Background:

• Traditional microgel synthesis often requires confined emulsions, initiators, catalysts, and deoxygenation.
• Developing sustainable and efficient routes for functional and bioactive polymer colloids is a significant challenge.

Purpose of the Study:

• To develop a facile solution spray method for spontaneous microgel synthesis.
• To create a catalyst-free and emulsion-free method for producing tunable polymer colloids.
• To enable in situ encapsulation of enzymes or drugs within microgels.

Main Methods:

• Utilizing the polarization of air-water interfaces in microdroplets to generate hydroxyl radicals.
• Initiating polymerization and crosslinking in an open-air environment.
• Applying the method to various monomers for microgel fabrication.

Main Results:

• Successfully synthesized microgels using a spontaneous solution spray method.
• Demonstrated tunable chemical structures and variable sizes of fabricated microgels.
• Prepared enzyme- or drug-loaded microgels with high enzymatic activity and stimuli-triggered release.

Conclusions:

• The developed method offers a sustainable and efficient alternative for microgel synthesis.
• This approach has broad applicability in macromolecular science, microdroplet chemistry, and potentially cellular and prebiotic chemistry.
• The ability to create functional, loaded microgels opens avenues for advanced drug delivery systems.