title: Oil core microcapsules by inverse gelation technique.
abstract: A promising technique for oil encapsulation in Ca-alginate capsules by inverse gelation was proposed by Abang et al. This method consists of emulsifying calcium chloride solution in oil and then adding it dropwise in an alginate solution to produce Ca-alginate capsules. Spherical capsules with diameters around 3 mm were produced by this technique, however the production of smaller capsules was not demonstrated. The objective of this study is to propose a new method of oil encapsulation in a Ca-alginate membrane by inverse gelation. The optimisation of the method leads to microcapsules with diameters around 500 μm. In a search of microcapsules with improved diffusion characteristics, the size reduction is an essential factor to broaden the applications in food, cosmetics and pharmaceuticals areas. This work contributes to a better understanding of the inverse gelation technique and allows the production of microcapsules with a well-defined shell-core structure.
authors.affiliation: Process Engineering for Environment and Food Laboratory, ONIRIS, Route de la Géraudière , Nantes , France and.
authors.forename: Evandro
authors.initials: E
authors.lastname: Martins
authors.forename: Denis
authors.initials: D
authors.lastname: Renard
authors.forename: Joëlle
authors.initials: J
authors.lastname: Davy
authors.forename: Mélanie
authors.initials: M
authors.lastname: Marquis
authors.forename: Denis
authors.initials: D
authors.lastname: Poncelet
mesh_terms: D000464:Alginates / Q000737:chemistry*; D002122:Calcium Chloride / Q000737:chemistry*; D002214:Capsules / Q000737:chemistry; D004655:Emulsions / Q000737:chemistry; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D008567:Membranes, Artificial; D009821:Oils / Q000737:chemistry*; D010316:Particle Size
chemical_list: D000464:Alginates; D002214:Capsules; D004655:Emulsions; D006603:Hexuronic Acids; D008567:Membranes, Artificial; D009821:Oils; D020723:Glucuronic Acid; D002122:Calcium Chloride
keywords: Alginate; emulsion; encapsulation; mixing; optimisation