查看文章

The encapsulation of the Pimenta dioica (P. dioica) essential oil in chitosan and chitosan/k-carrageenan microspheres was investigated. The P. dioica essential oil was extracted from P. dioica (L) Merr. berries by means of supercritical CO₂. 23 components, among which eugenol (68.06%), methyl eugenol (9.37%), were identified through GC analysis. The study of the antioxidant activity revealed that the IC50 (DPPH) value for the P. dioica essential oil is significantly lower (p ≤ 0.05) than the value of the butylated hydroxytoluene (BHT) and of the ascorbic acid (AAc). The microspheres containing P. dioica essential oil were prepared through the extrusion of the oil-in-water (O/W) emulsions using as wall material the chitosan and the chitosan/k-carrageenan in different mass ratios. Chitosan microspheres present a high swelling degree than the chitosan/k-carrageenan microspheres (p < 0.05). The release kinetics of …