The cocoa extract (Theobroma cacao L.) has a significant amount of polyphenols (TP) with potent antioxidant activity (AA). This study aims to optimise microencapsulation of the extract of cocoa waste using chitosan and maltodextrin. Microencapsulation tests were performed according to a Box–Behnken factorial design, and the results were evaluated by response surface methodology with temperature, maltodextrin concentration (MD) and extract flowrate (EF) as independent variables, and the fraction of encapsulated TP, TP encapsulation yield, AA, yield of drying and solubility index as responses. The optimum conditions were: inlet temperature of 170 °C, MD of 5% and EF of 2.5 mL/min. HPLC analysis identified epicatechin as the major component of both the extract and microparticles. TP release was faster at pH 3.5 than in water. These results as a whole suggest that microencapsulation was successful and the final product can be used as a nutrient source for aquatic animal feed.HighlightsMicroencapsulation is optimised according to a factorial design of the Box–Behnken type.Epicatechin is the major component of both the extract and microcapsules.The release of polyphenols from microcapsules is faster at pH 3.5 than in water.
Microencapsulation of Theobroma cacao L. waste extract: optimization using response surface methodology
ALIAKBARIAN, BAHAR;CASAZZA, ALESSANDRO ALBERTO;PEREGO, PATRIZIA;CONVERTI, ATTILIO
2017-01-01
Abstract
The cocoa extract (Theobroma cacao L.) has a significant amount of polyphenols (TP) with potent antioxidant activity (AA). This study aims to optimise microencapsulation of the extract of cocoa waste using chitosan and maltodextrin. Microencapsulation tests were performed according to a Box–Behnken factorial design, and the results were evaluated by response surface methodology with temperature, maltodextrin concentration (MD) and extract flowrate (EF) as independent variables, and the fraction of encapsulated TP, TP encapsulation yield, AA, yield of drying and solubility index as responses. The optimum conditions were: inlet temperature of 170 °C, MD of 5% and EF of 2.5 mL/min. HPLC analysis identified epicatechin as the major component of both the extract and microparticles. TP release was faster at pH 3.5 than in water. These results as a whole suggest that microencapsulation was successful and the final product can be used as a nutrient source for aquatic animal feed.HighlightsMicroencapsulation is optimised according to a factorial design of the Box–Behnken type.Epicatechin is the major component of both the extract and microcapsules.The release of polyphenols from microcapsules is faster at pH 3.5 than in water.File | Dimensione | Formato | |
---|---|---|---|
A295.pdf
accesso chiuso
Descrizione: Articolo principale
Tipologia:
Documento in versione editoriale
Dimensione
2.18 MB
Formato
Adobe PDF
|
2.18 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.