Cross-linking Phosphoric Acid Hydrolysates of Collagen with Cyanuric Chloride

A method for cross-linking collagen-based materials using cyanuric chloride was developed. Cross-linking of collagen phosphoric acid hydrolysates was demonstrated by the decrease of the number of the free primary amino groups, the increase in the denaturation temperature, collagenase resistance and changes in the FTIR spectra. The effects of concentration of the cross-linking agent, pH of the solution and the reaction time were studied. The cross-linked collagen hydrolysates showed higher cross-linking densities compared to non-cross-linked collagen hydrolysates. The denaturation temperature was elevated from 24°C for non-cross-linked DSC samples to 28°C for cross-linked samples. Collagen hydrolysates showed the increase resistance to in vitro collagenase degradation. The mixture of collagen hydrolysates with cyanuric chloride gives the possibility of producing new materials for potential biomedical applications.