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A polyhydroxyalkanoate material for fused deposition modeling and its preparation method

A technology of polyhydroxyalkanoate and fused deposition molding, which is applied in the field of 3D printing technology and plastic processing, can solve the problems of narrow processing temperature window and poor toughness, meet the requirements of low process conditions and production equipment, and widen the processing temperature window , strong practical effect

Active Publication Date: 2019-05-10
西安昆展精密机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a polyhydroxyalkanoate material for fused deposition molding and a preparation method thereof for the defects of narrow processing temperature window and poor toughness of the existing PHA material, and the addition of a new plasticizer can effectively Weaken the intramolecular and intermolecular hydrogen bonds in PHA materials, improve the comprehensive mechanical properties of PHA materials, and expand the application of PHA materials in the field of fused deposition molding

Method used

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  • A polyhydroxyalkanoate material for fused deposition modeling and its preparation method
  • A polyhydroxyalkanoate material for fused deposition modeling and its preparation method

Examples

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preparation example Construction

[0042] The preparation method of polyhydroxyalkanoate material for fused deposition molding of the present invention, the steps are as follows:

[0043] (1) Synthesis of materials with negative thermal expansion coefficient: Al 2 o 3 , Y 2 o 3 and MoO 3 According to a molar ratio of 1:1:4, or one of 0:1:2 or 1:0:2, grind and mix evenly, then put it into a quartz crucible, and send it into a tubular muffle furnace to heat to 900°C. Obtain sample after reaction 2 hours; Wherein when Al 2 o 3 , Y 2 o 3 and MoO 3 The sample prepared according to the molar ratio of 1:1:4 is AlYMo 2 o 6 , when Al 2 o 3 , Y 2 o 3 and MoO 3 The sample prepared according to the molar ratio of 0:1:2 is Y 2 Mo 2 o 6 , when Al 2 o 3 , Y 2 o 3 and MoO 3 The sample prepared according to the molar ratio of 1:0:2 is Al 2 Mo 2 o 6 ;

[0044] (2) Mixing of reagents and raw materials: first put polyhydroxyalkanoate into the mixer, then add lubricant and plasticizer, and stir until the ...

Embodiment 1~3 and comparative example 1

[0048] According to the composition of each component in Comparative Example 1 and Examples 1-3 in Table 1, the polyhydroxyalkanoate material was prepared according to the above preparation method. In embodiment 1-3 and comparative example 1, the polyhydroxyalkanoate used is poly 3-hydroxybutyrate-co-4-hydroxybutyrate copolymer, number average molecular weight is 100,000, plasticizer is new Pentylene glycol, negative thermal expansion coefficient material is AlYMo 2 o 6 , the lubricant is erucamide, the antioxidant is antioxidant 1010, tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester.

[0049] Table 1 Material formulations of Examples 1-3 and Comparative Example 1 (weight / part)

[0050]

[0051] The polyhydroxyalkanoate prepared in Examples 1-3 and Comparative Example 1 were tested for processability, mechanical properties, melt index and molding shrinkage, and the test results are shown in Table 1.

[0052] Compared with Comparative Exam...

Embodiment 3

[0054] In Example 3, the joint addition of the plasticizer and the material with a negative thermal expansion coefficient makes the various properties of the material, including processability, mechanical properties and molding shrinkage, all significantly improved, and greatly improves the polyhydroxyalkanoate material. The application performance in FDM is more suitable for FDM technology.

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Abstract

The invention discloses a polyhydroxyalkanoate material for fused deposition modeling and a preparation method of the polyhydroxyalkanoate material. The polyhydroxyalkanoate material for fused deposition modeling is prepared from the following components in parts by weight: 100 parts of polyhydroxyalkanoate, 1-10 parts of a plasticizer, 8-25 parts of a negative thermal expansion coefficient material, 0.9-3 parts of a lubricating agent and 0.01-0.5 part of a stabilizer. The specific chemical structure in the added novel plasticizer can avoid aggregation of macromolecular chains and reconstruction of hydrogen bonds while destroying hydrogen bonds in the material, the processability is greatly improved, and the integrated mechanical performance is obviously improved. Meanwhile, due to the addition of the negative thermal expansion coefficient material in the material, the integrated mechanical performance of the material can be maintained, the molding shrinkage of the material is effectively reduced, the dimensional accuracy of FDM parts is greatly improved, and the polyhydroxyalkanoate material is very suitable to be applied to the FDM. The preparation method of the polyhydroxyalkanoate material disclosed by the invention is easy to operate, can realize large-scale extended production and has wide market prospects.

Description

technical field [0001] The invention belongs to the fields of 3D printing technology and plastic processing, and in particular relates to a polyhydroxyalkanoate material for fused deposition molding and a preparation method thereof. Background technique [0002] 3D printing technology is a technology that uses materials such as plastic, metal or ceramics to construct objects by layer-by-layer printing based on digital model files. Compared with the traditional material deformation molding and removal molding process methods, 3D printing technology can quickly manufacture three-dimensional solid parts of any complex shape without fixtures or molds, which greatly shortens the product development cycle and greatly reduces the development cost. reduce. Now, 3D printing technology has been applied in many fields such as information technology, material science, precision machinery, etc., so it is called "manufacturing technology with industrial revolution significance". [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L23/06C08K13/02C08K5/05C08K5/053C08K3/22C08K5/134C08K5/526C08K5/09C08K5/20B33Y70/00
CPCB33Y70/00C08K3/22C08K5/05C08K5/053C08K5/09C08K5/1345C08K5/20C08K5/526C08K13/02C08K2201/014C08L67/04C08L23/06
Inventor 迟长龙于翔张浩卢晓龙王延伟辛长征
Owner 西安昆展精密机械有限公司
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