Maximizing the oil content in polysaccharide-based emulsion gels for the development of tissue mimicking phantoms.

Autor: Fontes-Candia C; Food Safety and Preservation Department, IATA-CSIC, Avda. Agustín Escardino 7, 46980 Paterna, Valencia, Spain., Lopez-Sanchez P; Agrifood and Bioscience, RISE Research Institutes of Sweden. Frans Perssons väg 6, SE-412 76, Gothenburg, Sweden., Ström A; Applied Chemistry, Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden., Martínez JC; ALBA Synchrotron Light Facility, Carrer de la Llum 2-26, 08290, Cerdanyola del Vallés, Barcelona, Spain., Salvador A; Food Safety and Preservation Department, IATA-CSIC, Avda. Agustín Escardino 7, 46980 Paterna, Valencia, Spain., Sanz T; Food Safety and Preservation Department, IATA-CSIC, Avda. Agustín Escardino 7, 46980 Paterna, Valencia, Spain., Trefna HD; Signal Processing and Biomedical Engineering, Department of Electrical Engineering, Chalmers University of Technology, Sweden., López-Rubio A; Food Safety and Preservation Department, IATA-CSIC, Avda. Agustín Escardino 7, 46980 Paterna, Valencia, Spain., Martínez-Sanz M; Food Safety and Preservation Department, IATA-CSIC, Avda. Agustín Escardino 7, 46980 Paterna, Valencia, Spain. Electronic address: mmartinez@iata.csic.es.
Jazyk: angličtina
Zdroj: Carbohydrate polymers [Carbohydr Polym] 2021 Mar 15; Vol. 256, pp. 117496. Date of Electronic Publication: 2020 Dec 29.
DOI: 10.1016/j.carbpol.2020.117496
Abstrakt: Formulations based on agar and κ-carrageenan were investigated for the production of emulsion gels applicable as tissue mimicking phantoms. The effects of the polysaccharide matrix, the oil content and the presence of surfactants on the micro-/nanostructure, rheology, and mechanical and dielectric properties were investigated. Results showed a high capacity of the agar to stabilize oil droplets, producing gels with smaller (10-21 μm) and more uniform oil droplets. The addition of surfactants allowed increasing the oil content and reduced the gel strength and stiffness down to 57 % and 34 %, respectively. The permittivity and conductivity of the gels were reduced by increasing the oil content, especially in the agar gels (18.8 and 0.05 S/m, respectively), producing materials with dielectric properties similar to those of low-water content tissues. These results evidence the suitability of these polysaccharides to design a variety of tissue mimicking phantoms with a broad range of mechanical and dielectric properties.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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