Amido polylactic acid as well as preparation method, application and application method thereof

Abstract

The invention discloses amido polylactic acid as well as a preparation method, application and an application method thereof. The amido polylactic acid is prepared from polylactic acid, an oxidizing agent, a dicarboxyl amine compound, a hydroxyl-containing acyl chloride monomer and a catalyst. The preparation method comprises the following steps: firstly, respectively preparing a dihydroxy amide monomer and polylactic acid with carboxyl at two ends, then esterifying the dihydroxy amide monomer and the polylactic acid to obtain an amido polylactic acid fiber with an amido group, and blending the amido polylactic acid fiber with a polyethylene fiber to prepare the amido polylactic acid degradation film material. According to the invention, amide groups are introduced into polylactic acid molecules through a chemical method, so that the polylactic acid is endowed with new performance, the heat resistance, chemical stability, biocompatibility and the like of the polylactic acid can be improved, and the formed amido polylactic acid degradable film material has the characteristics of degradability and antibacterial property, is relatively high in heat resistance and mechanical property, and can be widely applied to the field of degradable film materials. The method can be widely applied to the biomedical field.