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Polyaryletherketone powder and preparation method thereof

A polyaryletherketone and powder technology, which is applied in the field of polyaryletherketone powder and its preparation based on the dissolution and sedimentation method, can solve the problems of heat resistance and mechanical properties decline, unsatisfactory reinforcement effect, and large mechanical energy consumption. Achieve good sphericity and regularity, retain mechanical properties, and uniform particle size distribution

Active Publication Date: 2020-01-07
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a physical mixing method, the composite of polymer matrix and clay is not firm, and the reinforcement effect is not ideal
[0006]The mechanical pulverization method is generally to mechanically pulverize the material several times at low temperature, so the obtained powder is irregular in shape, resulting in a decrease in powder fluidity, which affects the sintered product performance, and due to the high strength of polyaryletherketone (PAEK), mechanical pulverization needs to consume a lot of mechanical energy, the processing cost is high, and the obtained powder cannot meet the ideal powder particle size distribution (10um-100um), such as CN105860431A A ball milling method was reported to prepare polyether ether ketone / multi-walled carbon nanotube composites. The polyether ether ketone powder and multi-walled carbon nanotubes were modified separately, and then mechanically stirred to obtain the composite material.
[0007] The dissolution and sedimentation method is to dissolve the material in a specific solvent, and then use methods such as cooling to make it precipitate in the solution system to obtain a powder. This method can obtain the particle size The relatively ideal powder of distribution, and can obtain comparatively regular powder, is widely used in the preparation of nylon powder and its composite material (such as CN105694086A), in the report about utilizing dissolution and sedimentation method to prepare PAEK material, the solvent used is mostly concentrated sulfuric acid, For example, when concentrated sulfuric acid dissolves PEEK, it will change the molecular chain structure of PEEK and sulfonate it to produce SPEEK. SPEEK will decrease in solvent resistance, heat resistance and mechanical properties.

Method used

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  • Polyaryletherketone powder and preparation method thereof

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Embodiment 1

[0032] An embodiment of the polyaryletherketone powder described in the present invention, the polyaryletherketone powder described in this embodiment is prepared by the following method:

[0033] (1) Add polyarylether ketone raw materials and organic solvents into the reaction vessel, the organic solvent is ethylene glycol, the ratio of the volume of the organic solvent to the weight of the polyarylether ketone raw materials is 3, and feed Nitrogen, exhaust the air in the reaction vessel, heat up while stirring, the stirring rate is 500r / min, the heating rate is 3°C / min, when the temperature is greater than 100°C, keep it warm for 1 hour, and then the solution is heated at a rate of 0.1°C / min Cool down to room temperature, precipitate out, take out the product and let stand;

[0034] (2) washing and drying the precipitate obtained in step (1) to obtain the polyarylether ketone powder; wherein, the washing process is: successively centrifuging and washing with ethanol, acetone...

Embodiment 2

[0036] An embodiment of the polyaryletherketone powder described in the present invention, the polyaryletherketone powder described in this embodiment is prepared by the following method:

[0037] (1) Add polyarylether ketone raw materials and organic solvents into the reaction vessel, the organic solvent is phenol; the ratio of the volume of the organic solvent to the weight of the polyarylether ketone raw materials is 100, and nitrogen gas is passed into it, Exhaust the air in the reaction vessel, heat up while stirring, the stirring rate is 1000r / min, the heating rate is 4°C / min, when the temperature is greater than 100°C, keep it warm for 20 hours, and then lower the solution at a cooling rate of 5°C / min To room temperature, precipitation precipitated, and the product was taken out and allowed to stand;

[0038] (2) washing and drying the precipitate obtained in step (1) to obtain the polyarylether ketone powder; wherein, the washing process is: successively centrifuging a...

Embodiment 3

[0040] An embodiment of the polyaryletherketone powder described in the present invention, the polyaryletherketone powder described in this embodiment is prepared by the following method:

[0041] (1) Add polyarylether ketone raw materials and organic solvents into the reaction vessel, the organic solvent is dimethyl sulfoxide, the ratio of the volume of the organic solvent to the weight of the polyarylether ketone raw materials is 40, usually Inject nitrogen, discharge the air in the reaction vessel, heat up while stirring, the stirring rate is 700r / min, the heating rate is 3.5°C / min, keep warm for 2 hours after the temperature is greater than 100°C, and then the solution is heated at a rate of 1°C / min The cooling rate is lowered to room temperature, a precipitate is precipitated, and the product is taken out and left standing;

[0042] (2) washing and drying the precipitate obtained in step (1) to obtain the polyaryletherketone powder; wherein, the washing process is: sequen...

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Abstract

The invention discloses a preparation method of polyaryletherketone powder based on a dissolution sedimentation method. The method comprises the following steps: (1) adding a polyaryletherketone raw material and an organic solvent into a reaction container, discharging air in the reaction container, heating while stirring, carrying out heat preservation to dissolve the polyaryletherketone raw material after the temperature is greater than 100 DEG C, slowly cooling the solution to room temperature, separating out a precipitate, taking out the product, and standing; and (2) washing and drying the precipitate obtained in the step (1) to obtain the polyaryletherketone powder. The polyaryletherketone (PAEK) powder prepared by the dissolution sedimentation method has good sphericity and regularity, is uniform in particle size distribution and low in processing cost, and is suitable for powder laying of high-temperature laser sintering; impurities cannot be introduced into the system, the posttreatment is simple, and the preparation method is suitable for industrial production.

Description

technical field [0001] The invention relates to a polyaryletherketone powder and a preparation method thereof, in particular to a polyaryletherketone powder based on a dissolution and sedimentation method and a preparation method thereof. Background technique [0002] Selective Laser Sintering (Selective Laser Sintering) is a widely used technology in additive manufacturing (3D printing). It layers the printed model, uses an infrared laser to scan the powder area that needs to be sintered, sinters layer by layer, and finally forms the entire model. This method can effectively sinter a model with a relatively complex structure, so it is widely used in the automotive industry, electrical industry, and aerospace fields. At present, polyamide (nylon), polystyrene, etc. are widely used polymer materials in SLS technology. Polystyrene is a semi-crystalline polymer material, the mechanical properties of its powder material sintered moldings are much lower than that of powder, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/14C08L71/10
CPCC08J3/14C08J2371/10Y02W30/62
Inventor 王苑沈家伟
Owner SUN YAT SEN UNIV
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