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Degradable flexible 3D printing material as well as preparation method and application thereof

A 3D printing and flexible technology, applied in the field of additive manufacturing, can solve the problems of material feeding into the throat, printing failure, wire jamming, etc., and achieve the effect of good flexibility, reduced thermal expansion rate, and small thermal expansion ratio

Active Publication Date: 2021-07-23
张晓军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

FDM 3D printing has certain requirements on the accuracy and roundness of printing materials. For example, under a wire diameter of 1.75mm, since the inner diameter of the FDM throat is only 1.80mm, the accuracy of printing materials is required to be ±0.05mm, especially Only when it is below ±0.03mm can it pass through the inner diameter under the pressure of the extrusion wheel, otherwise there will be problems such as jamming and printing failure; at the same time, the hardness of the printing material needs to be suitable for the clamping needs of the extrusion gear. If the material is too soft, the extrusion wheel cannot feed the material into the throat, which will also cause printing failure

Method used

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  • Degradable flexible 3D printing material as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The degradable flexible 3D printing material of this embodiment is made of the following raw materials in parts by weight: 70 parts of PBAT, 10 parts of polylactic acid, 6 parts of polycaprolactone, 12 parts of modified starch, and 1 part of maleic anhydride grafted polylactic acid , 4 parts of PEG20000 and 2 parts of compatibilizer; among them, modified starch is obtained by modifying corn starch with silane coupling agent KH550, and sorbitol is used as compatibilizer.

[0033] The preparation steps of the above-mentioned degradable flexible 3D printing materials are as follows:

[0034] 1. Preparation of modified starch

[0035] Mix 10 parts of cornstarch and 2 parts of silane coupling agent KH550 evenly, then stir for 20 minutes at a temperature of 50°C and a stirring speed of 150r / min; disperse the above mixture in 50 parts of absolute ethanol, Fully stir for 20 minutes under the conditions of 15° C. and 150 r / min stirring speed; finally, dry the obtained mixture t...

Embodiment 2

[0039] The degradable flexible 3D printing material of this embodiment is made of the following raw materials in parts by weight: 60 parts of PBAT, 15 parts of polylactic acid, 3 parts of polycaprolactone, 15 parts of modified starch, and 0.5 parts of maleic anhydride grafted polylactic acid , 3 parts of PEG20000 and 1 part of compatibilizer; wherein, modified starch is obtained by modifying sweet potato starch with silane coupling agent KH570, and glycerol is used as compatibilizer.

[0040] The preparation steps of the above-mentioned degradable flexible 3D printing materials are as follows:

[0041] 1. Preparation of modified starch

[0042] Mix 5 parts of sweet potato starch and 1 part of silane coupling agent KH570 evenly, then stir for 30 minutes at a temperature of 40 °C and a stirring speed of 200 r / min; disperse the above mixture in 55 parts of absolute ethanol, Fully stir for 30 minutes under the conditions of 10°C and 200r / min stirring speed; finally, dry the obtai...

Embodiment 3

[0046] The degradable flexible 3D printing material of this embodiment is made of the following raw materials in parts by weight: 80 parts of PBAT, 5 parts of polylactic acid, 8 parts of polycaprolactone, 5 parts of modified starch, and 1.5 parts of maleic anhydride grafted polylactic acid , 5 parts of PEG20000 and 3 parts of compatibilizer; wherein, modified starch is obtained by modifying corn starch with silane coupling agent KH550, and ethylene glycol is used as compatibilizer.

[0047] The preparation steps of the above-mentioned degradable flexible 3D printing materials are as follows:

[0048] 1. Preparation of modified starch

[0049] Mix 20 parts of cornstarch and 3 parts of silane coupling agent KH550 evenly, then stir for 10 min at a temperature of 60°C and a stirring speed of 100 r / min; disperse the above mixture in 45 parts of absolute ethanol, Fully stir for 10 minutes at 30° C. and a stirring speed of 100 r / min; finally, dry the obtained mixture to remove ethan...

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Abstract

The invention provides a degradable flexible 3D printing material as well as a preparation method and application thereof. The degradable flexible 3D printing material is prepared from the following raw materials in parts by weight: 40 to 90 parts of PBAT, 5 to 15 parts of polylactic acid, 3 to 8 parts of polycaprolactone, 5 to 15 parts of modified starch, 0.1 to 2 parts of maleic anhydride grafted polylactic acid, 3 to 5 parts of PEG and 1 to 3 parts of compatibilizer. The flexible 3D printing material has the advantages of being capable of being completely degraded, good in compatibility, low in thermal expansion rate, good in flexibility and the like, the printing temperature is low and the printing precision and the printing success rate are high during 3D printing, the 3D printing requirements of FDM equipment can be well met, printed products have good flexibility and rebound resilience, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a degradable flexible 3D printing material and its preparation method and application. Background technique [0002] 3D printing materials play a pivotal role in the field of 3D printing and are the heavy material basis for the development of 3D printing technology. The development of 3D printing materials determines whether 3D printing can have a wider application. At present, in order to meet the requirements related to the success of 3D printing, most of the printing materials commonly used in the market are TPU polyurethane materials with a hardness of 85A, 95A, and 64D. In addition, the material has certain limitations in terms of softness, resilience, and tensile strength of the model. [0003] PBAT is a thermoplastic biodegradable plastic, which is a copolymer of butylene adipate and butylene terephthalate. It has the characteristics of both PBA and PBT, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L51/08C08L3/02C08L71/02B33Y70/10
CPCC08L67/02B33Y70/10C08L2205/035C08L2201/06C08L2205/025C08L67/04C08L51/08C08L3/02C08L71/02
Inventor 张晓军韩民峰贾玲玉何督督傅文军
Owner 张晓军
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