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Polylactic acid modified material for 3D printing as well as preparation method and application thereof

A modified material and 3D printing technology, applied in the field of materials, can solve the problems of poor toughness, low printing temperature, and easy hydrolysis of polylactic acid, and achieve good hydrolysis resistance, convenient operation, and stable preparation process.

Inactive Publication Date: 2020-11-13
毛澄宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since polylactic acid is a biodegradable material, it is green and environmentally friendly, and at the same time, the printing temperature is low, which saves energy consumption. Therefore, polylactic acid can be used as a material for 3D printing. However, due to the poor toughness of polylactic acid, it is prone to hydrolysis in a warm and humid environment. limit its application

Method used

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  • Polylactic acid modified material for 3D printing as well as preparation method and application thereof
  • Polylactic acid modified material for 3D printing as well as preparation method and application thereof
  • Polylactic acid modified material for 3D printing as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Polylactic acid (U.S. NatureWorks produces 4032D type) 100 parts by weight, thermoplastic elastomer EPDM resin (U.S. Dow Company produces 4820 type) 5 weight parts, powder type toughening agent MBS resin (U.S. Dow Company produces BTA-731 type) Powder type) 5 parts by weight, hindered phenolic antioxidant 1010 (BASF company) 0.1 weight part and phosphorus antioxidant 168 (BASF company) 0.1 weight part were mixed uniformly to form a mixture. The above mixture is directly passed through a single-screw extruder at 200°C and 35Hz to make a 3D printing line with a diameter of 1.75mm, which is the polylactic acid modified material for 3D printing.

[0048] The 3D printing line has no discoloration and yellowing phenomenon, smooth surface, uniform thickness, and good flexibility. The 3D printing line is printed into cylindrical, hollow, pointed and different shapes by 3D printers produced by different companies such as Flashcasting and Qitu, at different nozzle temperatures, d...

Embodiment 2

[0050] 100 parts by weight of polylactic acid (4032D type produced by U.S. NatureWorks), 15 parts by weight of thermoplastic elastomer SEBS resin (YH-503 type produced by Baling Petrochemical Co., Ltd.), powder type toughening agent MBS resin (BTA-731 produced by U.S. Dow Company) Type) 3 parts by weight, 0.1 part by weight of hindered phenolic antioxidant 1076 and 0.05 part by weight of Aidike PEP-36 were uniformly mixed to form a mixture.

[0051] 3D printing lines and 3D printing products were prepared in the same manner as in Example 1 and their properties were investigated. The results show that the appearance of the 3D printing line is smooth, the diameter and size are stable, the shape of each printed product is intact, the interlayer bonding strength is high, and there is no phenomenon of deformation and cracking; the 3D printing line can maintain more than 7 times of double folds in a dry state. Soaked in water for more than 2 months, repeated twists and turns.

Embodiment 3

[0053] 100 parts by weight of polylactic acid (4032D type produced by U.S. NatureWorks), 3 parts by weight of thermoplastic elastomer POE resin (8150 type produced by Dow Chemical), powder type toughening agent MBS resin (BTA-731 type produced by U.S. Dow Company) 5 parts by weight and 5 parts of powder-type toughening agent ACR resin (PA20 type produced by Kanebuchi Chemical Co., Ltd., Japan) form a mixture.

[0054] 3D printing lines and 3D printing products were prepared in the same manner as in Example 1 and their properties were investigated. The results show that the 3D printing line has no discoloration and yellowing phenomenon, smooth surface, uniform thickness, stable diameter and size, and good flexibility. The shape of each 3D printed product is intact, without deformation and cracking. When the 3D printing line is dry, it can keep folding in half for more than 5 times, and it can be bent and twisted repeatedly after soaking in water for more than 2 months.

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Abstract

The invention provides a polylactic acid modified material for 3D printing. The polylactic acid modified material comprises the following components in parts by weight: 100 parts of polylactic resin,3-15 parts of a thermoplastic elastomer, 0.5-10 parts of a powder toughening agent and 0-1.5 parts of a thermal stabilizing aid. The polylactic acid modified material for 3D printing provided by the invention is good in comprehensive performance, convenient in flexibility adjustment, excellent in hydrolysis resistance and high in stability, and application of the polylactic acid modified materialin 3D printing is facilitated. The invention further provides a preparation method of the polylactic acid modified material for 3D printing and application of the polylactic acid modified material in3D printed products.

Description

technical field [0001] This application relates to the field of material technology, in particular to polylactic acid modified materials for 3D printing and their preparation methods and applications. Background technique [0002] 3D printing is a kind of rapid prototyping technology. It is based on digital model files and uses bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. At present, 3D printing based on Fused Deposition Modeling (FDM, Fused Deposition Modeling) is widely used. By extruding filamentous materials such as thermoplastics, wax or metal fuses from heated nozzles, according to the predetermined trajectory of each layer of the part , with a constant rate of melt deposition. Since polylactic acid is a biodegradable material, it is green and environmentally friendly, and at the same time, the printing temperature is low, which saves energy consumption. Therefore, polylactic acid can be used as a material for 3...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L23/16C08L51/04C08L53/02C08L23/08C08L33/04C08K5/134C08K5/526B33Y70/10B33Y70/00
CPCC08L67/04B33Y70/10B33Y70/00C08L2207/04C08L2205/03C08L2205/035C08L2207/53C08L23/16C08L51/04C08K5/1345C08K5/526C08L53/025C08L23/0815C08L33/04
Inventor 毛澄宇
Owner 毛澄宇
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