Artículo
Influence of the wall material on the moisture sorption properties and conditions of stability of sesame oil hydrogel beads by ionic gelation
Autor
VELAZQUEZ GUTIERREZ, SANDRA KARINA; 481491
ALPIZAR REYES, ERIK; 628114
GUADARRAMA LEZAMA, ANDREA YAZMIN; 296381
BAEZ GONZALEZ, JUAN GABRIEL; 37451
ALVAREZ RAMIREZ, JOSE DE JESUS; 9216
PEREZ ALONSO, CESAR; 122909
VELAZQUEZ GUTIERREZ, SANDRA KARINA
ALPIZAR REYES, ERIK
GUADARRAMA LEZAMA, ANDREA YAZMIN
BAEZ GONZALEZ, JUAN GABRIEL
ALVAREZ RAMIREZ, JOSE DE JESUS
PEREZ ALONSO, CESAR
Institución
Resumen
Artículo científico publicado en la Revista LWT-Food Science and Technology, la cual se encuentra indizada en el JCR, SCOPUS, pertenece al cuartil Q1 con un factor de impacto de 4.0 Sesame oil was encapsulated by ionic gelation using matrices of sodium alginate and nopal mucilage as wall material. Moisture sorption isotherms of three different types of hydrogels beads formed by SA-NM (1:0 w/w), SA-NM (1:1 w/w) and SA-NM (1:1.5 w/w) were performed at 25, 35 and 45 °C. Experimental isotherms were described by means of the GAB model, showing sigmoidal shape. Pore radius values of beads ranged from 0.81 to 7.59 nm, corresponding to micropores and mesopores classification. The integral thermodynamic properties were estimated to define conditions of maximum stability of the hydrogel beads. The point of maximum stability, linked to minimum integral entropy, was in the range 3.31-5.59 kg H2O/100 kg d.s. (corresponding to water activity, aW, of 0.23-0.59) in the studied temperature range. Enthalpy-entropy compensation for the beads exhibited the presence of two isokinetic temperatures; one at low moisture contents (0-5.95 kg H2O/100 kg d.s.) controlled by variations of the water entropy, and a second given by enthalpy-driven mechanisms. Overall, the results showed that the hydrogel beads exhibited features of micro- and meso-porous biomaterials. Besides, the composition of the wall material has central implications for the characteristics of the sorption process. Universidad Autónoma del Estado de México mediante el proyecto con clave 4738/2019/CIB