ReviewA review on synthesis, properties and applications of natural polymer based carrageenan blends and composites

- Carrageenan, a polysaccharide extracted from edible red seaweeds of Rhodophycea class.
- Very useful for viscosity increasing or gelling agent for long retention and controlled drug release.
- In spite of wide range of applications carrageenans have some drawbacks and adverse effects on the biological systems.
- This review article mostly emphases on natural polymer (chitosan, starch, collagen, alginate, gelatin, PLA based carrageenan blends and composites.

Carrageenan is a natural polysaccharide extracted from edible red seaweeds of Rhodophycea class. It has been used as a viscosity increasing or gelling agent for prolonged and controlled drug release, food, pharmaceuticals and other industries. However, in spite of wide range of applications, carrageenan has some drawbacks and adverse effects on the biological systems, so its modifications with natural and synthetic polymers are carried out. This review article presents different sources and properties of carrageenans with special emphasis on natural polymer based carrageenan blends and composites and their applications in controlled drug delivery system, wound dressing and tissue engineering because of their biodegradability and biocompatibility, food industry as thickening/gelling materials, cosmeceuticals and making polyelectrolyte complexes.