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Type: Artigo de periódico
Title: Influence Of Temperature On The Rheological Behavior Of Jaboticaba Pulp [influência Da Temperatura No Comportamento Reológico Da Polpa De Jabuticaba]
Author: Sato A.C.K.
Da Cunha R.L.
Abstract: The steady state and dynamic rheological behavior of jaboticaba pulp was studied at different temperatures (5, 25, 45, 65 and 85°C). Flow curves were obtained from 0 to 300 s-1 and the data were fitted to different models. The Herschel-Bulkley model showed the best fit (R2 > 0.98) to the experimental data. Increasing the temperature caused a decrease in the consistency index (k) and a slight increase in the flow index (n). Oscillatory rheological measurements were taken in the viscoelastic region to obtain mechanical spectra. The storage modulus (G′) of samples stored at 5°C was much higher than that recorded at other temperatures, indicating more intense particle interactions at this temperature, which contributed to strengthen the elastic network. At 45°C, the jaboticaba pulp showed a distinct behavior, possibly indicating the beginning of gelation of the pulp's natural pectin.
Rights: aberto
Identifier DOI: 10.1590/S0101-20612007000400033
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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