Thermal and thermodynamic characterization of a dye powder from liquid turmeric extracts by spray drying

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dc.creatorAura Yazmin Coronel Delgado
dc.creatorHéctor José Ciro Velásquez
dc.creatorDiego Alonso Restrepo Molina
dc.date2016
dc.date.accessioned2026-07-07T03:29:53Z
dc.descriptionThis study aimed to evaluate the thermodynamic properties of sorption isotherms and glass transition temperature (Tg) and the thermal properties of a dye powder obtained from turmeric extracts using spray drying. The sorption isotherms were evaluated at 15, 25 and 35 °C using the dynamic gravimetric method, wherein the isotherm data of the experiment were fit to GAB and BET models. Likewise, the Tg was measured using differential scanning calorimetry (DSC). Thermogravimetric analysis (TGA) was used to determine the mass loss, and the thermal properties (heat capacity, diffusivity and thermal conductivity) were determined using transient flow method. The results demonstrated that the GAB model best fit the adsorption data. The DSC analysis presented a glass transition temperature of 65.35 °C and a loss of volatiles at 178.07 °C. The TGA analysis indicated a considerable mass loss starting at 193 °C, resulting in degradation of the product. The thermal properties demonstrated a heat capacity of 2.45 J/g °C, a thermal conductivity of 0.164 ± 0.001 W/mK and a thermal diffusivity of 8.7x10-8 ± 0.000 m2/s.
dc.formatapplication/pdf
dc.identifier0304-2847
dc.identifierhttps://www.redalyc.org/articulo.oa?id=179943371010
dc.identifierhttps://www.redalyc.org/journal/1799/179943371010/
dc.identifierhttps://www.redalyc.org/journal/1799/179943371010/html/
dc.identifierhttps://www.redalyc.org/journal/1799/179943371010/179943371010.epub
dc.identifierhttps://www.redalyc.org/journal/1799/179943371010/movil
dc.identifier.urihttp://hdl.handle.net/123456789/435429
dc.languageen
dc.publisherUniversidad Nacional de Colombia
dc.relationhttp://www.redalyc.org/revista.oa?id=1799
dc.rightsRevista Facultad Nacional de Agronomía - Medellín
dc.sourceRevista Facultad Nacional de Agronomía - Medellín (Colombia) Num.1 Vol.69
dc.subjectAgrociencias
dc.titleThermal and thermodynamic characterization of a dye powder from liquid turmeric extracts by spray drying
dc.typeartículo científico

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Revista Facultad Nacional de Agronomía - Universidad Nacional de Colombia