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Porous microcapsule formation with microsieve emulsification.

Nagesh A Wagdare¹, Antonius T M Marcelis, Remko M Boom

¹Laboratory of Organic Chemistry, Wageningen University, 6703 HB Wageningen, The Netherlands. nagesh.wagdare@wur.nl

Journal of Colloid and Interface Science

|January 18, 2011

Summary

This summary is machine-generated.

Researchers developed core-shell Eudragit microcapsules using microsieve emulsification and solvent extraction. This method creates porous capsules with tunable properties for controlled content release at specific pH levels.

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Area of Science:

Materials Science
Polymer Chemistry
Nanotechnology

Background:

Eudragit microcapsules are utilized in various applications requiring controlled release.
Developing efficient and scalable methods for microcapsule fabrication is crucial.

Purpose of the Study:

To present a simple and effective method for preparing core-shell Eudragit microcapsules.
To investigate the influence of formulation on microcapsule properties and release characteristics.

Main Methods:

Microsieve emulsification using a micro-engineered membrane to create Eudragit FS 30D and hexadecane droplets in dichloromethane.
Solvent extraction of dichloromethane to induce phase separation and form core-shell structures.
Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) for structural analysis.

Main Results:

Successfully prepared core-shell Eudragit microcapsules with a narrow size distribution.
Demonstrated that shell porosity and pore size are controllable by adjusting Eudragit and hexadecane ratios.
Confirmed pH-dependent dissolution of Eudragit FS 30D above pH 7.1 for triggered release.

Conclusions:

Microsieve emulsification coupled with solvent extraction is a viable method for producing Eudragit microcapsules.
The fabricated microcapsules offer tunable porosity and controlled release capabilities.
These microcapsules are promising for applications requiring pH-triggered drug delivery or encapsulation.