Graphene/polyether ether ketone composite powder material and preparation method for sls

A technology of polyether ether ketone and composite powder, which is applied in the direction of additive processing, etc., can solve the problems of poor fluidity, uneven shape, and low bonding strength, and achieve good fluidity, uniform shape, and good sphericity.

Active Publication Date: 2019-03-22
GUANGDONG SILVER AGE SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a graphene / polyether ether ketone composite powder material for SLS technology and its preparation method, which uses solution blending in environment-friendly solvent ethanol and water The method of evaporation disperses the surface functionalized graphene evenly in the polymer matrix, thereby solving the technical problems of low interfacial bonding strength, poor fluidity, and uneven morphology of graphene / PEEK powder composite materials used in SLS. The obtained composite powder material has suitable particle size, good fluidity, and uniform shape, which is very suitable for SLS powder spreading and forming. It has obvious advantages in the manufacture of high-performance friction-resistant parts (such as bearings, gears, and bushings). In the automotive industry , The field of aerospace has broad application prospects

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  • Graphene/polyether ether ketone composite powder material and preparation method for sls

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preparation example Construction

[0030] The preparation method of the graphene / polyether ether ketone composite powder material used in the SLS technology provided by the present invention adopts the method of blending and evaporating in solution, and specifically includes the following steps:

[0031](1) Add graphene to concentrated sulfuric acid solution at 0°C, ultrasonicate at 240W 50Hz for 10min, stir at 400-500r / min for 10min, circulate like this for 2h, then slowly add potassium permanganate at a rate of 1g / min to dissolve it , heat up to 30-40°C and keep for 15-25h, after the reaction, transfer the solution to distilled water at 85-95°C and keep for 30min, cool to room temperature, add 30% hydrogen peroxide solution, settle, pour off the upper clear night, 8000-9000r / min high-speed centrifugation for 5 minutes, take out the upper clear layer with a dropper, and repeat the centrifugation three times. The obtained product is washed with 5% dilute hydrochloric acid solution to remove residual sulfate ion...

Embodiment 1～2

[0045] (1) Add 3g of graphene to 120ml of concentrated sulfuric acid solution at 0°C, ultrasonicate at 240W 50Hz for 10min, stir at 400r / min for 10min, and circulate like this for 2h, then slowly add 18g of potassium permanganate at a rate of 1g / min to make it Dissolve and heat up to 40°C for 15h. After the reaction, transfer the solution to 400ml of distilled water at 85°C for 30min, cool to room temperature, add 15ml of 30% hydrogen peroxide solution, settle, pour off the supernatant, centrifuge at 8000r / min for 5min, take out the supernatant with a dropper, The centrifugation was repeated three times, and the obtained product was washed with 5% hydrochloric acid solution to remove residual sulfate ions, washed with distilled water to neutrality, and treated in a vacuum oven at 60°C for 24 hours to constant weight to obtain GO.

[0046] (2) Disperse 0.3g GO evenly in 1L 10vol% ethanol aqueous solution, sonicate at 240W 50Hz for 10min, stir at 400r / min for 10min, and circulat...

Embodiment 3～4

[0051] (1) Add 3g of graphene to 120ml of concentrated sulfuric acid solution at 0°C, ultrasonicate at 240W 50Hz for 10min, stir at 450r / min for 10min, circulate like this for 2h, then slowly add 18g of potassium permanganate at a rate of 1g / min to make it Dissolved and heated to 35°C for 20h. After the reaction, transfer the solution to 400ml of distilled water at 93°C for 30min, cool to room temperature, add 15ml of 30% hydrogen peroxide solution, settle, pour off the supernatant, centrifuge at 8500r / min for 5min, take out the supernatant with a dropper, repeat After centrifugation three times, the obtained product was washed with 5% hydrochloric acid solution to remove residual sulfate ions, washed with distilled water until neutral, and treated in a vacuum oven at 60°C for 24 hours to constant weight to obtain GO.

[0052] (2) Disperse 0.7g GO evenly in 1L 50vol% ethanol aqueous solution, sonicate at 240W 50Hz for 10min, stir at 450r / min for 10min, and circulate like this ...

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Abstract

The invention discloses a graphene / polyetheretherketone composite powder material for an SLS (Selective Laser Sintering) technology and a preparation method. The preparation method for the composite material comprises the steps of firstly, subjecting graphene to oxidation and surface functionalization, then, uniformly dispersing the surface-functionalized graphene in an ethanol solution, adding polyetheretherketone powder into the dispersion, carrying out vigorous stirring, carrying out rotary heated evaporation, and carrying out baking, grinding and sieving, thereby obtaining the composite powder material. According to the graphene / polyetheretherketone composite powder material and the preparation method therefor, the graphene is uniformly dispersed in a macromolecular matrix, i.e., polyetheretherketone by adopting a solution blended evaporation method, and the prepared graphene / polyetheretherketone composite powder material is uniform in morphology, proper in particle size and good in powder flowability, thereby being very applicable to SLS forming.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing technology and material preparation, and more specifically relates to a graphene / polyether ether ketone composite powder material and a preparation method for SLS technology. Background technique [0002] Selective Laser Sintering (SLS) technology is a widely used additive manufacturing technology, which is based on the idea of ​​discrete accumulation forming, using laser to selectively scan sintered powder materials, layer-by-layer manufacturing, and layer-by-layer stacking to form solid model. Different from traditional processing methods such as removal forming, splicing forming and forced forming, it uses the material accumulation method to process and manufacture models and functional parts of polymer materials, ceramics, metals and various composite materials, regardless of the complexity of the formed parts. Therefore, it is widely used in the automotive industry and aerospace fields,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/16C08K9/02C08K9/06C08K3/04C08J3/12B33Y70/00
CPCB33Y70/00C08J3/12C08J2361/16C08K3/04C08K9/02C08K9/06C08K2201/003C08L61/16
Inventor 闫春泽陈鹏史玉升傅轶汪艳魏青松刘洁
Owner GUANGDONG SILVER AGE SCI & TECH CO LTD
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