Modified polylactic acid compound 3D printing material with wood property, as well as preparation method and application thereof

Abstract

The invention discloses a modified polylactic acid compound 3D printing material with wood property, as well as a preparation method and application thereof. The printing material is prepared from the following components in parts by mass: 70-90 parts of a polylactic acid raw material, 7.5-20.5 parts of alkali-treated wood powdered particles, 1-3 parts of a silane coupling agent, 1-5 parts of a thermoplastic elastomer and 0.5-1.5 parts of a nano-antibacterial agent. The preparation method comprises the following steps: mixing the raw materials; cooling and molding the melt extruded by a single-screw plastic extruder; and drying, drawing and winding to obtain the printing material. The printing material has excellent toughness and mechanical performance, has texture, color and smell of woods, and can be used for improving the phenomenon that the end cap is easily blocked by wood powder and expanding the optional varieties of wood powder, so that the printing material can be used for printing wood-like furniture products; and the self-cleaning antibacterial capability of wood-plastic materials is increased, and the environmental-friendliness performance of furniture products printed by the materials can be greatly improved.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a modified polylactic acid composite 3D printing material with woody properties, its preparation method and application. Background technique [0002] The 3D printing industry is developing more and more rapidly. With the popularization of 3D printers, consumers' demand for 3D printed patterns is getting higher and higher. In addition to plastic 3D printing consumables, 3D printing materials based on metals, ceramics, food and even human cells have appeared (Yu Dongmei, 2014). Recently, German inventor KaiParthy invented a 3D printing consumable called LAYWOO-D3, which contains a certain amount of recycled wood and harmless polymers. 3D printing between ℃. The works printed with LAYWOO-D3 materials not only look like wood, but also smell like wood. The biggest feature is that it can print different colors at different temperatures. Moreover, the printed p...

AI Technical Summary

Problems solved by technology

[0004] During the storage, transportation and use of wood-plastic furniture printed by 3D printing technology, due to the influence of humidity, harmful particles and gases in the surrounding environment and air, it is easy to breed bacteria and accumulate pollutants on the surface, which will have a negative impact on the environment. Human health is adversely affected, so compared with the patent application CN201310345147, the self-cleaning and antibacterial ability of the wood-plastic material is increased. At present, the popular wood-plastic 3D printing products and their raw materials on the market do not have antibacterial, antifouling and self-cleaning functions

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