Polylactic acid composite material for 3D (three-dimensional) printing and preparation method thereof

Abstract

The invention provides a polylactic acid composite material for 3D (three-dimensional) printing and a preparation method thereof. The preparation method of the composite material comprises the following steps: dissolving N-vinyl pyrrolidone in 2-butanone; adding benzoyl peroxide; then, sequentially adding p-methylbenzene sulfonic acid and alpha-ethyl cyanoacrylate; then adding polylactic acid granules; heating and stirring; and cooling to room temperature, wherein the content of polylactic acid is 40-50%, the content of alpha-ethyl cyanoacrylate is 10-20%, the content of N-vinyl pyrrolidone is 10-20%, the content of 2-butanone is 20-30%, the content of benzoyl peroxide is 1-2% and the content of p-methylbenzene sulfonic acid is 1-5%. The composite material provided by the invention is simple in preparation process, and the prepared composite material can be used for 3D printing in a temperature range of 0-40 DEG C without blocking a nozzle of a 3D printer, so that the defect that high-molecular polymers need to be melted under a high temperature condition for conventional 3D printing using a polylactic acid consumable is overcome.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a polylactic acid composite material for 3D printing and a preparation method thereof. Background technique [0002] There are two main factors restricting the development of 3D printing technology at this stage: printing materials and equipment. Compared with the research and development of equipment, the research and development of materials is more difficult. 3D printing technology itself is not complicated, but the available consumables are a difficulty. The consumables of ordinary printers are ink and paper, but the consumables of 3D printers are mainly glue and polymer materials, which must be specially treated, and the curing reaction speed of materials is also very high. Different 3D printing technologies have different requirements for molding materials, but all of them should be conducive to rapid and accurate molding. The molding materials determine the su...

AI Technical Summary

Problems solved by technology

3D printing technology itself is not complicated, but the available consumables are a difficulty

[0004] Chen Qing et al. invented a method for preparing polylactic acid materials for 3D printing (CN103665802A), specifically toughening and modifying with inorganic nanomaterials. The method is to use ultrasonic treatment technology to organically modify the surface of the nano-inorganic toughening agent with a coupling agent, and then grind and disperse the modified nano-inorganic toughening agent with polylactic acid, plasticizer, and dispersant. , mixing, and finally through extrusion granulation and wire drawing technology, a toughened modified polylactic acid material suitable for 3D printing technology is obtained, which overcomes the defects of poor toughness and poor processing performance of existing 3D printing polylactic acid materials. Simple and easy to industrialize

[0005] 3D printing technology cannot be promoted and applied on a large scale at present, mainly limited to 3D printing materials

At present, the types of materials used for 3D printing are still relatively small, which cannot meet the requirements of industrial applications.

In addition, conventional 3D printing technology is a fusion deposition molding technology, which requires maintaining a high printing temperature, usually greater than 200 ° C, which puts forward higher configuration requirements for 3D printers