Amorphous polyaryletherketone/sulfone powder for laser sintering 3D printing and preparation method of amorphous polyaryletherketone/sulfone powder

A technology of laser sintering and polyaryletherketone, which is applied in the field of additive manufacturing, can solve the problems of low powder fluidity, wide particle size distribution of powder particles, and low yield.

Inactive Publication Date: 2020-07-31
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the polyamide powder material is commonly obtained by the cryogenic pulverization method. The powder particle size distribution obtained by this process method is wide, the yield is low, the sphericity is poor, and the fluidity of the powder is low.

Method used

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  • Amorphous polyaryletherketone/sulfone powder for laser sintering 3D printing and preparation method of amorphous polyaryletherketone/sulfone powder
  • Amorphous polyaryletherketone/sulfone powder for laser sintering 3D printing and preparation method of amorphous polyaryletherketone/sulfone powder
  • Amorphous polyaryletherketone/sulfone powder for laser sintering 3D printing and preparation method of amorphous polyaryletherketone/sulfone powder

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preparation example Construction

[0028] The present invention at first provides a kind of preparation method of amorphous polyaryletherketone / sulfone powder for laser sintering, the method comprises:

[0029] Step 1: Dissolve the coarse powder of amorphous polyarylether nitrile ketone / sulfone resin in a solvent, then blend it with water, stabilizer, and emulsifier in a reaction vessel, and stir at a high speed at 40-50°C to form an emulsion; The solvent is preferably N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, N-methylpyrrolidone, methylene chloride or tetrahydrofuran; the stabilizer is preferably PVA, The emulsifier is preferably glycerol, the mass ratio of the amorphous polyarylether nitrile ketone / sulfone resin to the solvent is preferably 1:(1-5), and the mass ratio of the solvent, water, stabilizer and emulsifier is preferably It is 1:(5~15):0.2:0.2. The stirring rate is greater than 400rpm, and the stirring time is preferably 1-2h.

[0030] Step 2: Gradiently raise the temperatur...

Embodiment 1

[0042] Dissolve 5 g of coarse powder of amorphous polyaryletherketone resin (structure shown in II) in dichloromethane (10 g), and then mix with water (90 g), stabilizer (PVA, 2 g), emulsifier (glycerin, 2 g) Blended in a reaction vessel, stirred at 40°C for 2 hours at high speed to form an emulsion; gradually increased the temperature, each time by 10°C and kept warm for 0.5h, and finally raised to 90°C, distilled off the solvent dichloromethane; cooled to room temperature, filtered, and respectively used Wash the filter cake twice with ethanol and water, and dry it in vacuum at 180°C for 4 hours to obtain a dense microsphered amorphous polyaryletherketone powder with a bulk density of 0.4g / cm 3 , with a uniform particle size of about 20 μm.

[0043]

[0044] Wherein, m=0, n=1.

[0045] figure 1 It is a polarized light microscope image of the dense microsphered amorphous polyaryletherketone prepared in Example 1 of the present invention.

Embodiment 2

[0047] Dissolve 5 g of coarse powder of amorphous polyaryletherketone resin (structure shown in III) in dichloromethane (10 g), then mix with water (100 g), stabilizer (PVA, 2 g), emulsifier (glycerin, 2 g) Blended in a reaction vessel, stirred at 40°C for 2 hours at high speed to form an emulsion; gradually increased the temperature, each time by 10°C and kept warm for 0.5h, and finally raised to 90°C, distilled off the solvent dichloromethane; cooled to room temperature, filtered, and respectively used Wash the filter cake twice with ethanol and water, and dry it in vacuum at 180°C for 4 hours to obtain a dense microsphered amorphous polyarylether nitrile ketone powder with a bulk density of 0.45-0.5g / cm 3 , with a uniform particle size of about 50 μm.

[0048]

[0049]

[0050] Wherein, m=0.7, n=0.3.

[0051] figure 2 It is a polarized light microscope picture of the dense microsphered amorphous polyarylether nitrile ketone prepared in Example 2 of the present inve...

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Abstract

The invention provides amorphous polyaryletherketone/sulfone powder for laser sintering and a preparation method of the amorphous polyaryletherketone/sulfone powder, and belongs to the technical fieldof additive manufacturing. The method comprises the following steps: dissolving amorphous PEKN/sulfone resin coarse powder in a solvent, blending with water, a stabilizer and an emulsifier in a reaction container, and stirring at a high speed at 40-50 DEG C to form an emulsion; heating to 90-95 DEG C in a gradient manner, and evaporating to remove the solvent; and cooling to room temperature, filtering, washing with water and drying to obtain the amorphous polyaryletherketone/sulfone powder for laser sintering. The amorphous polyaryletherketone/sulfone laser sintering powder material which ishigh in sphericity degree, uniform and controllable in particle size and good in fluidity is prepared through a solvent emulsification method.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to an amorphous polyaryletherketone / sulfone powder for laser sintering and a preparation method thereof. Background technique [0002] Selective laser sintering (SLS) is currently a widely used rapid prototyping technology, which mainly manufactures three-dimensional objects by selectively sintering multiple powder layers with laser light, and is widely used in aerospace, medical, architecture and design and other fields. In the selective laser sintering process, the powder material used is the key to the product. The powder material can be applied in a wide range, including polymers, metals and ceramics. Among them, due to the low molding temperature and low sintering power of polymer materials Small and other advantages, thus becoming the most widely used selective laser sintering material. [0003] Polyamide (nylon) is a semi-crystalline polymer with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/10C08L81/06C08L29/04C08J3/12C08J3/03B33Y70/00
CPCB33Y70/00C08J3/03C08J3/12C08J2371/10C08J2381/06C08J2429/04
Inventor 高新帅王红华周光远栾世芳
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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