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Reactive extrusion toughening carbon fiber reinforced polylactic acid 3D printing material and preparation method thereof

A reactive extrusion and 3D printing technology, applied in the field of 3D printing materials, to achieve the effects of low cost, overcoming poor wire toughness, and environmental protection during processing

Active Publication Date: 2017-06-20
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

[0008] The purpose of the present invention is to provide a reaction toughened modified 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

Embodiment 1

[0037] Weigh 60 kilograms of PLA, 30 kilograms of chopped carbon fibers with a length of 150 μm and a diameter of 7.5 μm from Toray Corporation of Japan, 8 kilograms of polyether polyurethane oligomers, 0.5 kilograms of antioxidant 1010, vinyl tris(2-methoxyethoxy Base) 1 kg of silane, 0.5 kg of polyethylene wax, mixed evenly and then melted and extruded using a twin-screw extruder. The material stays in the screw for 1 minute, and the material is extruded into filaments through a twin-screw extruder and cooled to obtain carbon fiber-reinforced polylactic acid 3D printing filaments.

Embodiment 2

[0039] Weigh 82 kg of PLA, 5 kg of chopped carbon fiber with a length of 500 μm and a diameter of 5 μm from Japan Toho Corporation, 10 kg of bisphenol A diglycidyl ether, 1 kg of antioxidant 1010, 1 kg of antioxidant 168, γ-(2, 0.5 kilograms of 3-glycidyloxypropoxy)propyltrimethoxysilane, 0.5 kilograms of zinc stearate, use twin-screw extruder to melt and extrude after mixing uniformly, the length-to-diameter ratio of extruder screw is 25, barrel temperature 190 -210°C, the screw speed is 75rpm / min, the residence time of the material in the screw is 0.5min, the material is extruded into filaments through a twin-screw extruder, and cooled to obtain carbon fiber reinforced polylactic acid 3D printing filaments.

Embodiment 3

[0041]Weigh 80 kg of PLA, 15 kg of chopped carbon fiber with a length of 500 μm and a diameter of 7.0 μm from Taiwan Taili Company, 1 kg of maleic anhydride modified ethylene-octene copolymer, 0.5 kg of antioxidant 1010, 0.4 kg of antioxidant 168, ethylene 2 kg of trimethoxysilane, 0.1 kg of oxidized polyethylene wax, mixed evenly and then melted and extruded using a twin-screw extruder. / min, the residence time of the material in the screw is 3min, the material is extruded into filaments through a twin-screw extruder, and cooled to obtain carbon fiber reinforced polylactic acid 3D printing filaments.

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Abstract

The invention discloses a reactive extrusion toughening carbon fiber reinforced polylactic acid 3D printing material and a preparation method thereof, and relates to the technical field of 3D printing materials. Raw materials are mixed according to the formula and then the mixed raw materials are put into a twin-screw extruder to be extruded after frit reaction and a reaction extrusion toughening modification carbon fiber reinforced polylactic acid 3D printing wire material is obtained after cooling. The reactive extrusion toughening technology overcomes the problems of poor toughness and low elongation at break of the wire material with high carbon fiber content, is beneficial to improvement of the interface compatibility between carbon fiber and polylactic acid, and effectively ensures that the printing process of the printed pieces is smooth. The processing time is short, the working process is environmentally friendly, the use of a large number of mixed acid is avoided, environmental pollution is reduced, the cost is low, and the reactive extrusion toughening carbon fiber reinforced polylactic acid 3D printing material and the preparation method thereof are suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of 3D printing materials, in particular to a reaction extrusion toughened carbon fiber reinforced polylactic acid 3D printing material and a preparation method thereof. Background technique [0002] 3D printing technology is changing every corner of the industry with its unique influence. The rapid progress and popularization of 3D printing technology has led to a surge in the use of polylactic acid (PLA) consumables as the main consumable. However, it is found that the mechanical properties of pure PLA still cannot meet people's requirements for the mechanical properties of printed parts. Studies have shown that the addition of carbon fiber can effectively improve the tensile strength of polylactic acid printed parts, but there are also problems due to poor compatibility between carbon fiber and resin matrix, resulting in poor toughness of the filament and low elongation at break of the material. The prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L75/08C08L23/06C08L51/06C08L23/30C08K13/04C08K7/06C08K5/1515B33Y70/00
CPCB33Y70/00C08K5/1515C08K7/06C08K13/04C08K2201/003C08K2201/004C08L67/04C08L2205/03C08L75/08C08L23/06C08L51/06C08L23/30
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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