Rheology property study of kappa carrageenan
- Author:
Chao TONG
1
Author Information
- Publication Type:Journal Article
- Keywords: Cation; Flowactivationenergy; Kappa carrageenan; Pseudo-plastic fluid; Rheological property; Viscosity
- From: Chinese Pharmaceutical Journal 2017;52(2):130-134
- CountryChina
- Language:Chinese
- Abstract: OBJECTIVE: To investigate the rheological property of Kappa carrageenan and the effects of standing time, concentration, and temperature on the viscosity of carrageenan solution. METHODS: The fluid type was determined by fitting the rheological profiles to Power law model. The effect of temperature on the rheological behavior was investigated according to the viscous flowactivation energy(Eη) which was calculated by the Arrhenius formula. RESULTS: The viscosity of carrageenan solution decreased with the increase of shear rate and temperature, whereas it increased with the concentration. There existed a positive correlation between Eη and concentration. Furthermore, the effects of different cations on the viscosity were also studied and the results indicated that the viscosity increased significantly with the ionic concentration, especially that of potassium chloride. CONCLUSION: Carrageenan was inferred to be pseudo-plastic fluid which hasthe character of shear thinning effect and its viscosity is significantly affected by cationic species.
