Abstract

The combination between collagen polypeptide and the calcium ion was studied on a basis of preparation of collagen polypeptide from animals’ hide by enzymes. The product of the combination between collagen polypeptide and calcium ion was characterized by Uv-Vis analysis, Fourier transform infrared spectroscopy, scanning electron microscopy and other methods. The results indicated that the reaction between collagen polypeptide and the calcium ion is complicated. It includes the coordination linkage of calcium ion with the carboxyl and the amino groups of collagen polypeptide, ionic linkage of calcium ion and the carboxyl of collagen polypeptide and also absorption of collagen polypeptide and the calcium ion.