Micro-encapsulation by complex coacervation: influence of surfactant

✍ Scribed by K S Mayya; A Bhattacharyya; J-F Argillier

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 213 KB
• Volume: 52
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/pi.1125

✦ Synopsis

Abstract

Paraffin oil has been encapsulated using complex coacervation of gelatin and Arabic gum in the presence of a surfactant. Addition of an oppositely charged surfactant to a polyelectrolyte markedly increases the yield of the process. We report a two‐layer encapsulation of paraffin oil, based on a primary layer of interface active polyelectrolyte–surfactant complex, followed by a second layer of the conjugate polyelectrolyte–polyelectrolyte complex. Surfactant concentration has been found to be a crucial parameter to obtain good quality microcapsules and optimal yield. This confirms the importance of formulation aspects when looking for optimization of these techniques of micro‐encapsulation.

© 2003 Society of Chemical Industry