摘要
本文采用UV、FITIR、DSC研究了Ca^(2+)与明胶在分子水平上的相互作用机理以及pH值对体系相互作用的影响。实验表明,Ca^(2+)可取代明胶中羧基与氨基的相互作用而形成的新的配体。高的pH值有利于新配体的形成。
Ionic interaction between Ca^(2+) and gelatin was investigated by adding Ca^(2+) to gelatin with UV,FTIK, DSC. Ca^(2+) was found to form ionic combinations instead of amino-group with carboxyl of gelatin, then prevent the formation of a conjugated acid which will form when adding HCI into. gelatin water solution. Higher pH is good for the fomation of carboxylic salts, but too many other Cations will reduce interaction degree of Ca^(2+) gelatin combinations due to a salt formation compitition and variation in interaction surrounding.
