One biodegradable macromolecules carbodiimide and preparation method

The present invention relates to a biological macromolecular biodegradable carbodiimide and its preparation method, comprising the steps of: after the low molecular weight chitosan was dissolved in acetic acid in ethanol, is heated to a certain temperature to dissolve, a small amount of triethylamine added was adjusted to weakly basic, then add a certain amount thioisocyanate, after sufficient reaction, the product was filtered to give the intermediate, oxidation with sodium hypochlorite, to obtain the biodegradable macromolecules carbodiimide. The present invention has wide sources of raw materials, preparation method is simple, easy molecular weight control and the advantage of good biological degradability and the like, is a very promising green macromolecules carbodiimide anti-hydrolysis agent.