Uniform-sized PLA nanoparticles: preparation by premix membrane emulsification.

Area of Science:

• Materials Science
• Chemical Engineering
• Pharmaceutical Sciences

Background:

• Nanoparticle size critically influences drug release kinetics and in vivo biodistribution.
• Limited research exists on biodegradable nanoparticles with controlled, narrow size distributions.
• Achieving uniform nanoparticle size is essential for predictable drug delivery performance.

Purpose of the Study:

• To develop a facile and scalable method for producing uniform-sized biodegradable nanoparticles.
• To investigate the key parameters influencing nanoparticle size uniformity.
• To demonstrate the potential of these uniform nanoparticles in drug delivery applications.

Main Methods:

• A novel method combining emulsion-solvent removal and premix membrane emulsification was employed.
• Uniform nanodroplets were generated using high-pressure premix membrane emulsification.
• Polylactide (PLA) nanoparticles were formed through subsequent solidification.
• Optimization involved screening organic solvents, phase ratios, membrane pore size, and transmembrane pressure.

Main Results:

• Uniform-sized polylactide (PLA) nanoparticles were successfully prepared for the first time using the novel method.
• The coefficient of variation (CV) for nanoparticle size was controlled below 16.9% under optimized conditions.
• Key factors influencing size uniformity included solvent type, phase volume ratio, membrane pore size, and transmembrane pressure.
• The method demonstrated high productivity, simplicity, and ease of scale-up.

Conclusions:

• A novel, efficient, and scalable method for producing uniform-sized biodegradable nanoparticles was established.
• The developed nanoparticles exhibit great potential for advanced drug delivery systems.
• This technique addresses the need for precisely controlled nanoparticle characteristics in pharmaceutical development.