Título Influence of a shear post-treatment on rheological properties, microstructure and physical stability of emulgels formed by rosemary essential oil and a fumed silica
Autores SANTOS GARCÍA, JENIFER, Jimenez, M. , Calero, N. , Alfaro, M. C. , Munoz, J.
Publicación externa Si
Alcance Article
Naturaleza Científica
Cuartil JCR 1
Cuartil SJR 1
Impacto JCR 4.49900
Impacto SJR 1.33800
Fecha de publicacion 01/01/2019
ISI 447581200016
DOI 10.1016/j.jfoodeng.2018.08.013
Abstract Nanoemulsions containing rosemary essential oil, a natural food preservative, were developed by the micro fluidization technique and emulgels were formed by adding a fumed silica (Aerosil 200). The influence of homogenization pressure on droplet size was examined. The nanoemulsion prepared at 5000 psi in Microfluidizer showed the lowest Sauter diameter and it was selected as the starting point. The influence of shear on theological properties, stability and microstructure was studied for both the nanoemulsion and the emulgel formed. The emulsion showed recoalescence induced by shear, while the emulgel exhibited an alignment of a 3D-network. In addition, the prepared emulgel exhibited time-dependent behaviour. In spite of the fact that the viscoelastic functions of the emulgel decreased as a result of shear, a significant improvement in physical stability was detected by means of the Multiple Light Scattering technique.
Palabras clave Rosemary essential oil; Aerosil 200; Shear-induced structures; Applied rheology; Emulgel
Miembros de la Universidad Loyola

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