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ZHANG Ya-Qiong, YU Yi-Chen, LU Yi-Ye, LIU Li, YAO Yan-Qing, GUO Sheng-Rong. Effect of Ca2+ Concentration on the Viscosity of Dilute Alginate Solution[J]. Chinese Journal of Applied Chemistry,
;2006, 23(11): 1259-1263.
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The viscosity of dilute alginate solution as a function of Ca2+ concentration was studied by viscosity measurement.The effect of polymer concentration,temperature and NaCl on the viscosity was investigated.The results show that for 0.125% and 0.15% alginate solutions,the viscosities firstly declined to certain minimum values with increasing the amount of Ca2+ added,and then rapidly rised until gel occurred;for a 0.075% alginate solution,the viscosity slightly changed as the amount of Ca2+ increased;In ηrel~1/T had a good linearity in the temperature range of 15~35℃;the viscosity decreased as NaCl was added.Thermal stability and the structure of calcium alginate complex were analyzed by means of DSC and FTIR.
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Keywords:
- Sodium alginate,
- relative viscosity,
- FTIR,
- DSC
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