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Research on Protective Method of Amino in Chitosan

Two kinds of chitosan derivatives are made by adopting Schiff alkaline method and amino protonation method to modify the amino in chitosan. Deprotection to amino is conducted under the condition of both acidity and alkalinity. It turns out that these two kinds of methods can both be protective to amino in chitosan. And deprotection contributes to more convenience. Impurities brought by chitosan modified products made out of Schiff alkalinity method are lot. By means of deprotection, output of products is higher. Compared with Schiff Alkalinity method, the impurities brought by modified products made out of amino protonation method are lesser with a comparatively low productivity.