Drug entrapment for controlled release in radiation-polymerized beads

Area of Science:

• Polymer Chemistry
• Materials Science
• Drug Delivery Systems

Background:

• Drug delivery systems often require precise control over release kinetics.
• Polymer beads offer a versatile platform for encapsulating active pharmaceutical ingredients.
• Radiation-induced polymerization is a method for creating polymer matrices.

Purpose of the Study:

• To develop a method for preparing drug-loaded polymer beads using low-temperature, radiation-induced polymerization.
• To investigate the influence of formulation parameters on particle characteristics and drug release.
• To establish a controllable drug release mechanism from synthesized polymer beads.

Main Methods:

• Preparation of polymer beads via low-temperature, radiation-induced polymerization.
• Dissolving polymers (polymethyl methacrylate, polystyrene) in glass-forming monomers with dispersed drug.
• Dropping the mixture into cold precipitation media (e.g., ethanol) to form monomeric particles.
• Irradiating monomeric particles at low temperatures to induce polymerization.

Main Results:

• Achieved complete spherical particles using ethanol as the precipitation medium.
• Demonstrated that drug release profiles from polymerized particles are modifiable.
• Showed that varying the glass-forming monomer and precipitation medium impacts drug release.

Conclusions:

• Low-temperature, radiation-induced polymerization is a viable method for producing drug-loaded polymer beads.
• The characteristics of the glass-forming monomer and precipitation medium are critical factors in controlling drug release.
• This technique offers a tunable approach for designing advanced drug delivery systems.