Factors Affecting the Retention Efficiency and Physicochemical Properties of Spray Dried Lipid Nanoparticles Loaded with Lippia sidoides Essential Oil

Author(s)

Baldim, Iara ^{[1, 2]} ; Rosa, Debora M. ^[1] ; Souza, Claudia R. F. ^[1] ; Da Ana, Raquel ^[3] ; Durazzo, Alessandra ^[4] ; Lucarini, Massimo ^[4] ; Santini, Antonello ^[5] ; Souto, Eliana B. ^{[2, 3]} ; Oliveira, Wanderley P. ^[1]

Affiliation

^[1] Univ Sao Paulo, Sch Pharmaceut Sci Ribeirao Preto, Ave Cafe S-N, BR-14040903 Ribeirao Preto - Brazil

^[2] Univ Minho, CEB Ctr Biol Engn, Campus Gualtar, P-4710057 Braga - Portugal

^[3] Univ Coimbra, Fac Pharm, Dept Pharmaceut Technol, Polo Ciencias Saude, P-3000548 Coimbra - Portugal

^[4] CREA Res Ctr Food & Nutr, Via Ardeatina 546, I-00178 Rome - Italy

^[5] Univ Napoli Federico II, Dept Pharm, I-80131 Naples - Italy

• Document type: Journal article
• Source: BIOMOLECULES; v. 10, n. 5 MAY 2020.
• Web of Science Citations: 1

Abstract

Essential oils (EOs) are widely used in various industrial sectors but can present several instability problems when exposed to environmental factors. Encapsulation technologies are effective solutions to improve EOs properties and stability. Currently, the encapsulation in lipid nanoparticles has received significant attention, due to the several recognized advantages over conventional systems. The study aimed to investigate the influence of the lipid matrix composition and spray-drying process on the physicochemical properties of the lipid-based nanoparticles loaded with Lippia sidoides EO and their retention efficiency for the oil. The obtained spray-dried products were characterized by determination of flow properties (Carr Index: from 25.0% to 47.93%, and Hausner ratio: from 1.25 to 1.38), moisture (from 3.78% to 5.20%), water activity (<0.5), and powder morphology. Zeta potential, mean particle size and polydispersity index, of the redispersed dried product, fell between -25.9 mV and -30.9 mV, 525.3 nm and 1143 nm, and 0.425 and 0.652, respectively; showing slight differences with the results obtained prior to spray-drying (from -16.4 mV to -31.6 mV; 147 nm to 1531 nm; and 0.459 to 0.729). Thymol retention in the dried products was significantly lower than the values determined for the liquid formulations and was affected by the drying of nanoparticles. (AU)

• FAPESP's process: 18/26069-0 - Encapsulation of essential oils for use in pharmaceutical compositions with antimicrobial activity
• Grantee: Wanderley Pereira Oliveira
• Support Opportunities: Regular Research Grants
• FAPESP's process: 11/10333-1 - Microencapsulation and nanoencapsulation of natural compounds by drying technologies
• Grantee: Cláudia Regina Fernandes de Souza
• Support Opportunities: Research Grants - Young Investigators Grants