Biodegradable polylactic acid material for 3D printing and preparation method thereof

Abstract

The invention relates to a biodegradable polylactic acid material for 3D printing and a preparation method and an application thereof. The material provided by the invention contains, by weight, 50-90 parts of polylactic acid, 10-50 parts of aliphatic polycarbonate, 0.01-1 part of organic peroxide, 0.05-1 part of a cross-linking agent, 1-50 parts of a reinforcing agent, 0.3-5 parts of a compatilizer, 0.1-5 parts of a heat stabilizer and 0.1-1 part of an antioxidant. The biodegradable polylactic acid material provided by the invention can be used in a 3D printing technology. The material meets operating requirements of 3D printing, has various excellent properties of plastic, can remain good transparency, has high impact strength, can provide high toughness and thermal deformation strength, has good thermal stability and processing stability, and has low cost.

Description

technical field [0001] The invention relates to a three-dimensional printing material and a preparation method thereof, in particular to a biodegradable polylactic acid material and a preparation method thereof. Background technique [0002] Three-dimensional (3D) printing technology, also known as additive manufacturing technology, is actually an emerging technology in the field of rapid prototyping. It is based on digital model files and uses bondable materials such as powdered metal or plastic. The technology of constructing objects by layer printing. The basic principle is additive manufacturing, the technique of adding material layer by layer to generate a three-dimensional solid. At present, 3D printing technology is mainly used in product prototyping, mold manufacturing, art creation, jewelry making and other fields, replacing these traditional fine processing techniques. In addition, 3D printing technology is gradually being applied in medicine, bioengineering, arc...

AI Technical Summary

Problems solved by technology

[0004] Polylactic acid has the advantages of non-toxicity, no pungent smell, low melting temperature, degradable and pollution-free, small cooling shrinkage, transparent and easy to dye, etc., all of which meet the requirements of 3D printing technology for polymer materials; but the crystallization of polylactic acid The factors of low degree of heat distortion, low impact strength, and poor toughness of polylactic acid caused by factors such as low degree of heat distortion, low energy of ester bonds in molecular chains, and easy breakage lead to great restrictions on the application range of products printed from polylactic acid. limit

[0005] Chinese Patent Publication No. CN103146164A discloses a polylactic acid material for rapid prototyping nanomaterial toughening and a preparation method thereof. Although the toughness of polylactic acid has been enhanced, the low impact strength and low heat distortion temperature of polylactic acid have not been modified to improve

Chinese Patent Publication No. CN103087489A discloses a polylactic acid modified material and its preparation method, which uses polyether polyamide elastomer and montmorillonite as modifiers to enhance the tensile strength and elongation at break of polylactic acid rate, but the defects of low impact strength and low heat distortion temperature of polylactic acid have not been improved

At present, this material alone cannot meet the requirements of industrial processing and daily application, but it can be used in combination to greatly improve the toughness and impact strength of other polyester materials.

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