Rheology study of supercritically extracted tea-oil

The rheological analysis on dynamic shear rate-viscosity relationship of tea-oil extracted from tea-oil tree seeds by supercritical extraction method was carried out at gradient temperatures and constant shear rate, respectively. The results show that at 20, 40, 60 and 80°C, once the shear rate incr...

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Bibliographic Details
Published inJournal of Central South University of Technology. Science & technology of mining and metallurgy Vol. 15; no. Suppl 1; pp. 506 - 508
Main Authors Zhang, Dang-quan, Chen, Sheng-ming, Peng, Wan-xi, Liu, Qi-mei, Gu, Zhen-jun, Fan, Shao-gang, Deng, Shun-yang
Format Journal Article
LanguageEnglish
Published Heidelberg Central South University 01.09.2008
Subjects
Engineering
Metallic Materials
viscosity
rheology
dynamic shear rate
supercritical extraction
tea-oil
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Summary:The rheological analysis on dynamic shear rate-viscosity relationship of tea-oil extracted from tea-oil tree seeds by supercritical extraction method was carried out at gradient temperatures and constant shear rate, respectively. The results show that at 20, 40, 60 and 80°C, once the shear rate increases gradually, the torque enlarges correspondingly, while the viscosity shows little difference. However, at the constant shear rate, the rising temperature results in a steady downtrend on tea-oil viscosity. This results reveal that tea-oil viscosity is not closely correlated with shear rate at constant temperature, yet negatively correlated with temperature at constant shear rate.
ISSN:1005-9784
1993-0666
DOI:10.1007/s11771-008-0410-3