Resumo

RUBIANO, Karla; CARDENAS, Jaime  e  CIRO-VELASQUEZ, Héctor J.. EVALUATION OF THERMODYNAMIC AND THERMAL PROPERTIES FOR D-LIMONENE ENCAPSULATED BY SPRAY DRYING. rev.udcaactual.divulg.cient. [online]. 2015, vol.18, n.2, pp.425-434. ISSN 0123-4226.

The objective of this study was to evaluate the thermodynamic and thermal properties of d-limonene, encapsulated by spray drying determining sorption isotherms, glass transition temperature, heat capacity, thermal conductivity and thermal diffusivity, complementing the characterization with thermogravimetric analysis (TGA). Sorption isotherms were determined by dynamic gravimetric method at temperatures of 10, 20 and 30°C fitting the experimental data to GAB and BET models, showing that the best fit model was GAB model. Also, thermal analysis for the powder by calorimetry differential scanning (DSC) indicated a value of 97.1°C to the glass transition temperature and thermogravimetric analysis showed that the powder presented a slight loss of volatiles at 150°C and subsequently thermal degradation occurs after 200°C. Finally, thermal properties such as conductivity, diffusivity and specific heat of encapsulated product were 0.098±0.0001W/m°C, 8.7x10^-8±0.0001m²/s and 1.914±0,0001J/g°C, respectively.

Palavras-chave : Sorption heat; glass transition temperature; thermogravimetric analysis.

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