Method for preparing polylactic acid degradable material

Abstract

The invention relates to a method for preparing a degradable material, in particular to a method for preparing a polylactic acid degradable material, which comprises the following steps: 1, preparing 50 to 80 weight percent of polylactic acid, 10 to 40 weight percent of acetyl cellulose, 1 to 10 weight percent of biodegradable polyester, 1 to 10 weight percent of plasticizer and 1 to 5 weight percent of nano organic modified montmorillonite; 2, filling the polylactic acid, acetyl cellulose, biodegradable polyester, plasticizer and nano organic modified montmorillonite into a high-speed mixer,and stirring uniformly; and 3, filling the uniformly mixed raw material into a granulator for blending, melting, extruding, cooling and granulating and thus, obtaining the degradable material. The preparation method has the advantages that: the process is simple; the raw materials are mixed by a one-step process; and the prepared material can be obtained by granulation in a double-screw extruder.The product made of the degradable material prepared by the method has high rigidity and excellent performance indexes.

Description

Technical field: [0001] The invention relates to a preparation method of a degradable material, in particular to a preparation method of a polylactic acid degradable material. Background technique: [0002] Polylactic acid (PLA), also known as polylactide, belongs to the family of polyesters. Polylactic acid is a polymer obtained by polymerizing lactic acid as the main raw material. The raw material source is sufficient and can be regenerated. The production process of polylactic acid is non-polluting, and the product can be biodegraded to realize the cycle in nature, so polylactic acid is an ideal green polymer material. [0003] Since polylactic acid is a new type of biodegradable material, it is made from starch raw materials proposed by renewable plant resources (such as corn). The starch raw material is fermented into lactic acid, which is then converted into polylactic acid through chemical synthesis. It has good biodegradability and can be completely degraded by mi...

AI Technical Summary

Problems solved by technology

These abandoned water-retaining films also caused great damage to the soil structure of the land, which directly led to a series of adverse consequences such as land production reduction.

[0005] Based on the above, it is a current research direction to apply polylactic acid to traditional plastic products, but in the actual preparation process, polylactic acid materials still have certain deficiencies, such as its impact resistance, thermal stability, etc. There are deficiencies, and further research is needed