Effects of storage conditions on the physical stability of d-limonene nanoemulsion

• Published in: Food hydrocolloids 2016-02, Vol.53, p.218-224
• Main Authors: Li, Po-Hsien, Lu, Wen-Chien
• Format: Article
• Language: English
• Subjects: d-limonene; Droplet size; Encapsulated ratio; Nanoemulsions; Physical stability; Zeta potential
• ISSN: 0268-005X; 1873-7137
• DOI: 10.1016/j.foodhyd.2015.01.031

d-limonene, with bactericide, antioxidant, chemo-preventative and therapeutic activities, has received cosmetic and pharmaceutical interest in the last decade. d-limonene is poorly soluble; therefore, incorporation into nanoemulsions may help solubilize and encapsulate the component. We investigated the physical stabilities of d-limonene nanoemulsions during 98-day storage and at 4 °C, 25 °C and 50 °C, respectively. d-limonene nanoemulsions were disk-shaped, and the zeta potential was approximately −35 mV at original the pH 6.4. The zeta potential, droplet size, viscosity and turbidity were affected by the storage conditions, for decreased stability during storage. The encapsulated ratio of d-limonene in nanoemulsions was significantly decreased during storage with increasing temperature, which resulted in increased release rate constant of d-limonene. This study provides a strategy to manufacture promising o/w nanoemulsions for a system to deliver lipophilic flavor to agrochemical, cosmetic and food products. [Display omitted] •d-limonene is a monocyclic monoterpene that exhibits beneficial health effects.•Hydrophobic, reactive and volatile limit d-limonene use.•Nanoemulsion technology is probably a good method to encapsulate this component.•Nanoemulsion stability was strongly influenced by the storage conditions.•This information useful for designing d-limonene delivery systems.