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Effect of β - CD on kinetic behavior of colloidal dispersions of tea infusion |
Key Lab of Tea Biochemistry and Biotechnology, Ministry of Education, Anhui Agricultural University, Hefei, Anhui 230036, China)
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Abstract Colloidal stability and aggregation kinetics of the tea infusion dispersion with and without β - cyclodextrin (β -CD ) were investigated. Results showed that the critical coagulation concentration (CCC) of NaCl was increased from 213. 675 mmol/L to 384. 615 mmol/L, particles radius and sedimentation rate in gravitation were decreased, viscidity and diffuse speed were increased. It explained that tea infusion dispersions went from fast aggregating stage to more stable stage with the addition of β - CD. The mechanism of colloidal stability of β - CD in tea liquid and the solution aggregation kinetics were also discussed.
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