Abstract:The properties of alginate gel made by using of CaCl2 was studied in this paper. The characteristics of the gel depended on the concentration of CaCl2, temperature and M/G of the alginate. The optimal gelation property was obtained in CaCl2 solution with concentration of 2.0% and at temperature of 50℃. The gel strength of the alginate gel with higher G concentration was better, while the water holding capacity was better with higher M concentration. The change of the gel structure before and after gelation was determined by IR. The results indicated that the OH peak shifted to higher range and the C-H stretching vibration became weaker, which may result from the cross-linking of alginate with calcium.
