Volume 36, Issue 10 pp. 1627-1642
Review

Size and Shape of Calcium Alginate Beads Produced by Extrusion Dripping

B.-B. Lee

Corresponding Author

B.-B. Lee

Universiti Malaysia Perlis, School of Bioprocess Engineering, Arau, Perlis, Malaysia

Universiti Malaysia Perlis, School of Bioprocess Engineering, Arau, Perlis, MalaysiaSearch for more papers by this author
P. Ravindra

P. Ravindra

Universiti Malaysia Sabah, School of Engineering and Information Technology, Kota Kinabalu, Sabah, Malaysia

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E.-S. Chan

E.-S. Chan

Monash University Malaysia, School of Engineering, Chemical Engineering Discipline, Bandar Sunway, Selangor, Malaysia

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First published: 10 September 2013
Citations: 261

Abstract

Alginate hydrogel beads are widely used as an encapsulation medium for biomedical, bioprocessing, and pharmaceutical applications. The size and shape of the beads are often critically controlled since in many usages the beads are monodisperse in size and spherical in shape. Extrusion dripping is a well-known method to produce alginate beads. Nevertheless, the production of beads of desired size and spherical shape is often achieved based on one's experience or trial and error. An overview is provided on alginate properties, formulation and preparation of alginate and gelling solutions, production conditions, and post-production treatment that may influence the bead size and shape. Various methods of bead size and shape measurement are also discussed.

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