RT info:eu-repo/semantics/article
T1 Components interactions and stability factors in terpenes oil-in-water emulsions stabilized with hydrolyzed soybean lecithin
A1 Casas González, Andrea Patricia
A1 Rodríguez Rojo, Soraya
K1 Terpenes
K1 Low-energy emulsification methods
K1 Hydrolyzed soy lecithin
K1 Guar gum
K1 Iso-eugenol
K1 Phytosanitary products
K1 23 Química
AB R-(+)-limonene, eucalyptol, and linalool are natural compounds with promising antifungal activity but limitedpractical applicability due to high volatility, low water solubility, and photodegradability. This study investigatesthe formulation of stable oil-in-water emulsions using a low-energy phase inversion method and exclusivelynaturally derived components. The influence of the surfactant concentration (0.5–1.1 wt% hydrolyzed soybeanlecithin), the addition of a co-surfactant (2.6 wt% isoeugenol), thickener concentration (0.05–0.50 wt% guargum), continuous-phase pH (3, 5, & 7), and active compound physicochemical properties was systematicallyevaluated. Emulsions containing 11 wt% terpene were prepared by water titration. Stable formulations wereobtained at neutral pH using 1.1 wt% lecithin, 2.6 wt% isoeugenol and 0.5 wt% guar gum. Acidification reducedstability, associated with pH-dependent variations in surface charge and intermolecular interactions affectingboth interfacial organization and bulk rheology. Differences in droplet size distribution and viscosity amongterpenes highlight the role of active compound polar character in governing emulsion microstructure. Overall,this work demonstrates that stable, fully natural terpene-based emulsions can be rationally designed using low-energy methods, providing a formulation framework relevant to sustainable phytosanitary applications.
PB Elsevier
SN 0927-7757
YR 2026
FD 2026
LK https://uvadoc.uva.es/handle/10324/83753
UL https://uvadoc.uva.es/handle/10324/83753
LA eng
NO Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2026, 740, p. 140209
NO Producción Científica
DS UVaDOC
RD 24-mar-2026