Polyaryletherketone powder and preparation method thereof

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...

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.

Images