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Microencapsulation of Rambutan Peel Extract by Spray Drying
Luis Boyano-Orozco1, Tzayhrí Gallardo-Velázquez2, Ofelia Gabriela Meza-Márquez1
1Departamento de Ingeniería Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Av. Wilfrido Massieu S/N, Col. Unidad Profesional Adolfo López Mateos, Zacatenco, Ciudad de México CP. 07738, Mexico.
Spray drying effectively microencapsulates rambutan peel bioactive compounds (BC) using maltodextrin. This method protects BC, enhancing their application in food, pharmaceutical, and cosmetic industries.
Area of Science:
- Food Science and Technology
- Natural Product Chemistry
- Materials Science
Background:
- Rambutan peel is a rich source of bioactive compounds (BC) with antioxidant capacity (AC).
- Effective methods are needed to stabilize and deliver these BC for industrial applications.
- Microencapsulation offers a promising approach to protect sensitive compounds.
Purpose of the Study:
- To optimize the microencapsulation of bioactive compounds (BC) from rambutan peel using spray drying.
- To determine the optimal conditions for both ethanolic extraction of BC and spray drying encapsulation.
- To evaluate the efficiency and properties of the microencapsulated bioactive compounds.
Main Methods:
- Optimized ethanolic extraction of BC from rambutan peel at 60°C for 1 hour with 55% aqueous ethanol.
- Spray drying encapsulation using DE10 maltodextrin as the encapsulating agent.
- Determined optimal spray drying parameters: 160°C inlet, 80°C outlet temperature, and 10% encapsulating agent concentration.
Main Results:
- Achieved higher than 85% retention and encapsulation efficiencies for BC and AC.
- Obtained powder with low water activity (0.25 ± 0.01), moisture content (3.95 ± 0.10%), and good Hausner Index (1.42 ± 0.00).
- The optimized powder exhibited good solubility and intact microcapsule morphology.
Conclusions:
- Spray drying is a viable technique for microencapsulating bioactive compounds from rambutan peel.
- The process effectively protects the bioactive compounds, preserving their antioxidant capacity.
- The microencapsulated product is suitable for diverse applications in the food, pharmaceutical, and cosmetic sectors.
