Nano-toughened and carbon fiber reinforced PLA (polylactic acid) 3D printing material and preparation method

A 3D printing, polylactic acid technology, applied in the field of 3D printing materials, to achieve good interlayer adhesion, excellent mechanical properties, and low odor.

Active Publication Date: 2017-06-13
TECH & ENG CENT FOR SPACE UTILIZATION CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a nano-toughened carbon fiber reinforced polylactic acid 3D printing material and its preparation method, thereby solving the aforementioned problems existing in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] In the present invention, the specific preparation method may include the following steps:

[0030] Step 1, weighing raw materials according to the formula;

[0031] Step 2, fully mixing the nano toughening agent and the silane coupling agent through a high-speed mixer or a ball mill to obtain material A;

[0032] Step 3, after mixing the obtained material A with chopped carbon fiber, polylactic acid, and anti-ultraviolet absorbing agent, to obtain material B;

[0033] Step 4, adding the material B into a twin-screw extruder to melt and extrude it, and obtain a nano-toughened carbon fiber-reinforced polylactic acid 3D printing material after cooling.

[0034] Wherein, in step 4, the temperature of the melt extrusion may be: 180-220°C.

Embodiment 1

[0036] Weigh 1 kg of polysilsesquioxane and 0.5 kg of 3-aminopropyltriethoxysilane, put them into a high-speed mixer and mix to obtain material A;

[0037] The obtained material A and 30 kilograms of chopped carbon fibers with a length of 6 mm and a diameter of 7.5 μm, 66.5 kilograms of polylactic acid, 1 kilogram of three (1,2,2,6,6-pentamethylpiperidinyl) phosphite, polyethylene wax Put 1 kg into a high-speed mixer and mix evenly, melt and extrude through a twin-screw extruder at 200°C, extrude into filaments, and cool to obtain carbon fiber-reinforced polylactic acid 3D printing filaments.

Embodiment 2

[0039] Weigh 10 kg of montmorillonite and 2 kg of γ-(methacryloyloxy)propyltrimethoxysilane, put them into a high-speed mixer and mix to obtain material A;

[0040] Put the obtained material A into a high-speed mixer with 5 kilograms of chopped carbon fibers with a length of 1 mm and a diameter of 12 μm, 80 kilograms of polylactic acid, 1 kilogram of 2-hydroxy-4-n-octyloxybenzophenone, and 2 kilograms of polyethylene wax. After homogenization, it is melted and extruded through a twin-screw extruder at 200°C, extruded into filaments, and cooled to obtain carbon fiber-reinforced polylactic acid 3D printing filaments.

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Abstract

The invention discloses a nano-toughened and carbon fiber reinforced PLA (polylactic acid) 3D printing material and a preparation method and relates to the technical field of 3D printing materials. The carbon fiber reinforced PLA 3D printing material prepared with a reactive extrusion method by adding a nano-toughening agent has good 3D printing performance, a print head cannot be blocked, less odor is emitted in a printing process, printing pieces have better inter-layer bonding force and excellent the mechanical properties, and the problems that the PLA 3D printing material prepared with a formula and a preparation method in the prior art produces heavier odor in the printing process, the print head of a printer is blocked easily by the printing material and the mechanical properties of the printing pieces are moderate are solved.

Description

technical field [0001] The invention relates to the technical field of 3D printing materials, in particular to a nano-toughened carbon fiber reinforced polylactic acid 3D printing material and a preparation method thereof. Background technique [0002] 3D printing technology, as one of the fastest growing and most potential technologies this year, has brought a profound impact on people's lives and work. Acrylic-butadiene-styrene (ABS) and polylactic acid (PLA) materials commonly used in 3D printing are increasingly accessible to designers. However, 3D printing technology still has some problems, such as poor mechanical properties of printed parts due to poor interlayer bonding caused by fused deposition printing, easy to block printing nozzles, heavy odor during printing, polluting the environment and affecting experiments Issues such as personnel health, these issues also give 3D printing technology room for improvement. Therefore, materials that can be widely used in 3D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L83/04C08K7/06C08K13/04C08K3/34C08K3/36C08K3/04C08K7/24
CPCC08K2201/003C08K2201/004C08K2201/011C08L67/04C08L83/04C08K7/06C08L23/06C08K13/04C08K3/346C08L23/30C08K3/36C08K3/04C08K7/24
Inventor 王功赵伟程天锦刘晓冬刘亦飞王醴刘存生刘鸣刘兵山窦睿
Owner TECH & ENG CENT FOR SPACE UTILIZATION CHINESE ACAD OF SCI
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