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Preparation method of polyetheretherketone nanopowder with lamellar structure

A polyetheretherketone and nano-powder technology, which is applied to grain processing and other directions, can solve the problems of uncontrollable morphology of polyetheretherketone ultrafine powder, serious equipment heating, uneven pulverization, etc., to reduce the degree of agglomeration, The effect of low equipment loss and low cost

Active Publication Date: 2022-07-08
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of uncontrollable morphology, uneven crushing, uneven particle size, low output, serious equipment heat generation, and large equipment loss in the prior art that directly prepares polyetheretherketone ultrafine powder by mechanical pulverization. And proposed, its purpose is to provide a kind of preparation method of polyetheretherketone nanopowder with lamellar structure

Method used

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  • Preparation method of polyetheretherketone nanopowder with lamellar structure
  • Preparation method of polyetheretherketone nanopowder with lamellar structure
  • Preparation method of polyetheretherketone nanopowder with lamellar structure

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preparation example Construction

[0039] A preparation method of polyether ether ketone nano-powder with lamellar structure, comprising the following steps:

[0040] (i) Pretreatment

[0041] The granular polyetheretherketone is placed in a vacuum drying oven to remove water and dry to obtain polyetheretherketone pellets;

[0042] The granular polyether ether ketone is a kind of granular material and micron powder material;

[0043] The vacuum drying temperature is 60°C to 180°C, and the time is 2h to 12h.

[0044] (ii) Pulverizer pre-cooling

[0045] Turn on the switch of the liquid nitrogen pump, pass the liquid nitrogen into the pulverizer, and pre-cool it before pulverizing;

[0046] The pulverizer is any one of an airflow type ultrafine pulverizer and a mechanical ultrafine pulverizer.

[0047] The precooling time is 15min-60min.

[0048] (iii) Pulverization of polyether ether ketone pellets

[0049] The polyether ether ketone pellets are added to the pre-cooled ultrafine pulverizer through the feed...

Embodiment 1

[0060] A polyether ether ketone nano-powder with a lamellar structure, the preparation method of which comprises the following steps:

[0061] 1) Weigh 1000 g of polyether ether ketone granules, place them in a vacuum drying oven, and dewater and dry them at 120° C. for 10 hours to obtain dried polyether ether ketone granules;

[0062] 2) Turn on the liquid nitrogen pump switch, adjust the liquid nitrogen flow to 1mL / min, and pre-cool the jet mill for 30min;

[0063] 3) Turn on the air flow type ultrafine pulverizer switch, wait for 30s, and after the pulverizer is stable, add the polyether ether ketone pellets obtained in step 1) into the air flow type ultrafine pulverizer feed port, and maintain the liquid nitrogen flow at 1mL / min, start ultra-low temperature pulverization;

[0064] 4) Collect the polyether ether ketone powder prepared by ultra-low temperature pulverization in the collection bag at the discharge port of the pulverizer;

[0065] 5) Place the polyether ether ...

Embodiment 2

[0070] A polyether ether ketone nano-powder with a lamellar structure, the preparation method of which comprises the following steps:

[0071] 1) Weigh 1000 g of polyether ether ketone granules, place them in a vacuum drying oven, and dewater and dry them at 120° C. for 10 hours to obtain dried polyether ether ketone granules;

[0072] 2) Turn on the liquid nitrogen pump switch, adjust the liquid nitrogen flow to 1mL / min, and pre-cool the jet mill for 30min;

[0073] 3) Turn on the air flow type ultrafine pulverizer switch, wait for 30s, and after the pulverizer is stable, add the polyether ether ketone pellets obtained in step 1) into the air flow type ultrafine pulverizer feed port, and maintain the liquid nitrogen flow at 1mL / min, start ultra-low temperature pulverization;

[0074] 4) Collect the polyether ether ketone powder prepared by ultra-low temperature pulverization in the collection bag at the discharge port of the pulverizer;

[0075] 5) Place the polyether ethe...

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Abstract

The invention discloses a preparation method of polyether ether ketone nano-powder with lamellar structure. Using granular polyether ether ketone as a raw material, liquid nitrogen ultra-low temperature pulverization technology combined with wet ball milling technology is used to prepare polyether ether ketone nano powder with lamellar structure. Polyetheretherketone nanopowder. The obtained polyetheretherketone has a lamellar structure with a thickness of nanometers. By controlling the concentration of the solvent dilute sulfuric acid, the roughness of the surface of the lamellae can be regulated, so as to meet the needs of different occasions. The preparation method involved in the invention is simple in operation, low in cost and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the field of preparation of polyether ether ketone, in particular to a preparation method of polyether ether ketone nano-powder with lamellar structure. Background technique [0002] Polyether ether ketone is composed of repeating units containing one ketone bond and two ether bonds in the main chain structure, and belongs to the aromatic semi-crystalline thermoplastic special polymer material. The structure of polyether ether ketone contains three benzene rings, two ether bonds and one carbonyl group. This special structure makes polyether ether ketone a special engineering plastic with "rigidity and flexibility". Higher mechanical properties, with higher glass transition temperature (Tg=143°C) and melting point (Tm=343°C); "flexibility" gives it a lower glass transition temperature compared to other specialty plastics , making it easy to form and process, and this "rigid and flexible combination" also makes it a material wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/12C08L61/16B02C21/00
Inventor 吴庆知姜豪
Owner WUHAN UNIV OF TECH
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