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Beta-hydroxybutyrate and beta-hydroxyvalerate copolymer powder for selective laser sintering and preparation method thereof

A technology of hydroxybutyrate and hydroxyvalerate, which is applied in the field of β-hydroxybutyrate and β-hydroxyvalerate copolymer powder and its preparation, can solve the problems such as the absence of PHBV solid powder, and achieve the size of Moderate, uniform particle size distribution, suitable bulk density

Inactive Publication Date: 2017-10-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no universally applicable PHBV solid powder for selective laser sintering on the market

Method used

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  • Beta-hydroxybutyrate and beta-hydroxyvalerate copolymer powder for selective laser sintering and preparation method thereof
  • Beta-hydroxybutyrate and beta-hydroxyvalerate copolymer powder for selective laser sintering and preparation method thereof
  • Beta-hydroxybutyrate and beta-hydroxyvalerate copolymer powder for selective laser sintering and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 100 parts by weight of PHBV resin and 1000 parts by weight of acetone were placed in an autoclave. Introduce high-purity nitrogen to 0.2MPa. Then the temperature was raised to 135° C. and kept at this temperature for 60 minutes.

[0039] After the constant temperature is over, the cooling water is lowered to 80°C at a rate of 1.0°C / min, and kept at this temperature for 60 minutes; continue to drop to room temperature at a rate of 1.0°C / min.

[0040] The material is centrifuged to separate the precipitate, and the precipitate is vacuum-dried to obtain a PHBV resin powder suitable for selective laser sintering.

[0041] The morphology of the obtained PHBV resin powder is as follows figure 1 The particle sizes and particle size distributions are listed in Table 1.

Embodiment 2

[0043] 100 parts by weight of PHBV resin and 800 parts by weight of acetone were placed in an autoclave. Introduce high-purity nitrogen to 0.1MPa. Then the temperature was raised to 140° C. and kept at this temperature for 80 minutes.

[0044] After the constant temperature is over, the cooling water is lowered to 70°C at a rate of 1.0°C / min, and kept at this temperature for 70 minutes; it is lowered to 20°C at a rate of 0.5°C / min, and maintained at 20°C for 30 minutes.

[0045] The material is centrifuged to separate the precipitate, and the precipitate is vacuum-dried to obtain a PHBV resin powder suitable for selective laser sintering.

[0046] Scanning electron microscopy was used to characterize the morphology of the obtained PHBV resin powder (results were similar to Example 1, and the SEM image was not shown here), and the particle size and particle size distribution are listed in Table 1.

Embodiment 3

[0048] 100 parts by weight of PHBV resin and 1200 parts by weight of butanone were placed in an autoclave. Introduce high-purity nitrogen to 0.3MPa. Then the temperature was raised to 130° C. and kept at this temperature for 90 minutes.

[0049] After the constant temperature is over, it is lowered to room temperature at a rate of 0.1°C / min.

[0050] The material is centrifuged to separate the precipitate, and the precipitate is vacuum-dried to obtain a PHBV resin powder suitable for selective laser sintering.

[0051] Scanning electron microscopy was used to characterize the morphology of the obtained PHBV resin powder (results were similar to Example 1, and the SEM image was not shown here), and the particle size and particle size distribution are listed in Table 1.

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Abstract

The invention provides beta-hydroxybutyrate and beta-hydroxyvalerate copolymer powder for selective laser sintering and a preparation method thereof. According to the preparation method, a raw material of beta-hydroxybutyrate and beta-hydroxyvalerate resin powder having shape, property and the like especially suitable for selective laser sintering can be acquired by selecting proper solvent, especially specific temperature and pressure, and designing a proper heating and cooling mode.

Description

technical field [0001] The invention relates to the technical field of polymer processing, in particular to a β-hydroxybutyrate and β-hydroxyvalerate copolymer powder suitable for selective laser sintering and a preparation method thereof. Background technique [0002] Selective Laser Sintering (SLS) technology is a rapid prototyping technology, which is currently the most widely used and most promising technology in additive manufacturing technology, showing a rapid development trend in recent years. Selective laser sintering technology is a computer that first scans the three-dimensional entity, and then selectively melts and sinters the material powder that is pre-laid on the workbench or parts by high-intensity laser irradiation, layer by layer, and then realizes layer by layer. molding technology. Selective laser sintering technology has a high degree of design flexibility, can manufacture accurate models and prototypes, can form parts with reliable structures that can...

Claims

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Application Information

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IPC IPC(8): C08J3/12C08L67/04
CPCC08J3/12C08J2367/04
Inventor 吕芸刘建叶初立秋张师军邹浩白弈青邵静波徐萌徐毅辉侴白舸陈若石
Owner CHINA PETROLEUM & CHEM CORP
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