Abstract
Mentha spicata essential oil (EO) is isolated from the aerial parts of Mentha spicata L. with pronounced antibacterial effects as food preservative in food industry. Nevertheless, its application in the clinical industry and food is significantly restricted by its poor water solubility and physicochemical instability. Glycerosomes of this EO were prepared to enhance its anti-microbial stability. The EO was encapsulated in the glycerosomes and characterized for its physical properties. The optimized EO-loaded glycerosomes displayed entrapment efficiency of 93.2 ± 7.5%, release efficiency of 75.4 ± 6.1%, the particle size of 276nm, and zeta potential of - 30.4 mV. Scanning electron microscopy (SEM) image showed spherical morphology of the glycerosomes. EO release from optimized formulation of glycerosomes best fitted with a first-order kinetic model. Compared with free EO, EO-loaded glycerosomes showed better storage stability. The results indicated that the incorporation of EO in glycerosomes possessed sustained release properties and significantly enhanced antibacterial effects in storage.
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