Dear friend Sri Rahayu

Microencapsulation is a process that involves enclosing active ingredients in a protective coating to improve their stability and bioavailability (Microencapsulation of Theobroma.........). Chitosan and maltodextrin are two commonly used materials for microencapsulation (A review of microencapsulation methods.....and Evaluation of chitosan as a wall material......). Chitosan is a natural polymer derived from chitin, which is found in the shells of crustaceans like shrimp and crabs (Effect of microencapsulation....). Maltodextrin is a carbohydrate derived from corn, rice, or potato starch (Microencapsulation of Theobroma...........).

One study used spray-drying as a microencapsulation method to protect polyphenols extracted from Capulin Prunus serotina using maltodextrin-chinchayote starch as encapsulants (A review of microencapsulation methods.....). Another study optimized microencapsulation of cocoa waste extract using chitosan and maltodextrin (Effect of microencapsulation..........).

As for microencapsulation of antioxidant extract using chitosan and maltodextrin, one study evaluated chitosan as a wall material for microencapsulation of squalene by spray drying (Evaluation of chitosan as a wall material........). The study found that maltodextrin was one of the most popular polysaccharides used for purposes of spray-drying microencapsulation due to its good solubility and low viscosity at high concentrations.

I hope this helps! Let me know if you have any other questions.

Source:

(1) A review of microencapsulation methods for food antioxidants .... https://www.sciencedirect.com/science/article/pii/S0308814618313669.

(2) Effect of microencapsulation (maltodextrin-chinchayote starch) on the .... https://www.researchgate.net/publication/324778623_Effect_of_microencapsulation_maltodextrin-chinchayote_starch_on_the_antioxidant_capacity_of_the_Capulin_Prunus_serotina.

(3) Evaluation of chitosan as a wall material for microencapsulation of .... https://www.researchgate.net/publication/315540655_Evaluation_of_chitosan_as_a_wall_material_for_microencapsulation_of_squalene_by_spray_drying_Characterization_and_oxidative_stability_studies.

(4) Microencapsulation of Theobroma cacao L. waste extract .... https://www.researchgate.net/publication/313816913_Microencapsulation_of_Theobroma_cacao_L_waste_extract_optimization_using_response_surface_methodology.

(5) Microencapsulation of antioxidant compounds through innovative .... https://www.sciencedirect.com/science/article/pii/S092422441830102X.

To create microcapsules containing an antioxidant extract, the following steps are generally followed:

Preparation of the microencapsulation matrix: the matrix is ​​the material that surrounds the antioxidant extract and protects it from the external environment. The matrix can be made of different materials such as natural or synthetic polymers, lipids, proteins or polysaccharides.

Preparation of the antioxidant extract: the antioxidant extract is generally prepared by extraction from natural sources such as plants, fruits or vegetables.

Formation of the microcapsule: the matrix is ​​generally dissolved or dispersed in a solvent, then the antioxidant extract is added and the mixture is agitated to form droplets. The droplets are then hardened to form microcapsules.