Microencapsulation of flaxseed oil produced by sequential rotor stator homogenization and spray drying – Optimization of emulsion composition

Yakdhane, Asma and Chaabane ep Zinneddin, Donia and Eya, Yakdhane and Molnár, Máté András and Nath, Arijit and Koris, András (2024) Microencapsulation of flaxseed oil produced by sequential rotor stator homogenization and spray drying – Optimization of emulsion composition. PROGRESS IN AGRICULTURAL ENGINEERING SCIENCES, 20 (1). pp. 159-177. ISSN 1786-335X

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Abstract

Microencapsulation of flaxseed oil (FO) has received lots of attention in the food and biopharmaceutical industries. To produce FO microcapsules, aqueous emulsions of FO with polymeric carbohydrates (maltodextrin (MD) with dextrose equivalent (DE) 19, gum Arabic (GA) and modified starch (MS)) were prepared by a rotor stator homogenization and subsequently, dehydration of emulsions were performed by spray drying (SD). The objective of this research was to study the effects of different combinations of polymeric carbohydrates with FO in emulsion to obtain maximum encapsulation efficiency (EE). A 3 factorials–3 levels Box–Behnken design was used for the optimization purpose. The maximum EE was achieved using 0.79 MD-GA ratio, 20.23% MS and 24.62% FO in emulsion. Microcapsules obtained by optimum condition had EE 77.68%, particle size ( D 32 ) 120.0 ± 0.43 μm, moisture content1.6 ± 0.13%, wettability 192 ± 5.5 s, solubility 75.49 ± 1.3%, bulk density 0.31 ± 0.025 g mL −1 , tapped density 0.36 ± 0.01 g mL −1 , Carr's Index 13.88 ± 0.01% and Hausner Ratio 1.16 ± 0.01.

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