Response Surface Optimization on Microencapsulation of Lemongrass Essential Oil Using Spray Drying

Abstract:

Microencapsulation by spray drying is offered to prevent volatilization or degradation of lemongrass essential oil as food additives and ingredients in traditional medicines. In this process, oil is contained in microcapsules by enclosing with wall material. Although gum arabic is commonly used according to its encapsulation efficiency and stability, its cost is more expensive. This experiment used cassava starch for wall material because it was cheaper than gum and could get optimized condition for microencapsulation of lemongrass essential oil. The 3 factors of microcapsulation consisting of the mass ratio of CS:GA, mass ratio of wall: core materials, and inlet temperatures were optimized for maximum response, the process yield (PY) and encapsulation efficiency (EE) using response surface methodology. The results concluded that the highest weight replacement of cassava starch and gum arabic at 2.4:1, wall:core ratio 3.4-4.0:1 with inlet air temperature about 180 °C for spray drying was the optimal condition for was higher than 70 % PY and 85 % EE.

• Periodical: Key Engineering Materials (Volume 859)
• Pages: 271-276
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.859.271
• Online since: August 2020
• Authors: Teerawat Boonsom, Ekachai Dumkliang*
• Keywords: Lemongrass Essential Oil, Microencapsulation, Response Surface Methodology

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