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Fluorine oxidized graphene/polyimide composite material, preparation method and application thereof

A technology of polyimide and composite materials, applied in the field of graphene oxyfluoride/polyimide composite materials and its preparation

Active Publication Date: 2018-09-04
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to improve the deficiencies in the prior art, the object of the present invention is to provide a graphene oxyfluoride / polyimide composite material and its preparation method and application, the surface of the graphene oxyfluoride contains active groups, compared to graphite Graphene, which is not easy to agglomerate, has good dispersibility in polymers or solvents (such as organic solvents or water systems), and can directly form a strong interaction between polymer interfaces to realize graphene oxyfluoride in polymer bases. Reinforcement Effects in Composite Materials

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  • Fluorine oxidized graphene/polyimide composite material, preparation method and application thereof
  • Fluorine oxidized graphene/polyimide composite material, preparation method and application thereof

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[0039] The present invention also provides a method for preparing graphene oxyfluoride. The method uses graphite oxide as a raw material to prepare the graphene oxyfluoride by using a hydrothermal method.

[0040] In one embodiment of the present invention, the preparation method includes the following steps:

[0041] The graphene oxide fluoride is prepared by mixing graphite oxide, oxidizing agent and hydrofluoric acid for hydrothermal reaction.

[0042]In one embodiment of the present invention, the mass percentage of the graphite oxide in the mixed solution is 2-15wt%; the oxidant in the mixed solution is 3-30wt%; the hydrofluoric acid is The mass percent content of the mixed solution is 3-25 wt %; the balance is water. Preferably, the graphite oxide accounts for 5-10wt% by mass of the mixed solution; the oxidant accounts for 5-25wt% by mass of the mixed solution; the hydrofluoric acid accounts for 5-25wt% by mass of the mixed solution The content is 5-20wt%; the balance ...

Embodiment 1

[0061] Step 1: Preparation of graphene oxyfluoride

[0062] Configure the mixed solution as follows:

[0063] 10g of graphite oxide, 12g of hydrogen peroxide (that is, 40g of hydrogen peroxide with a concentration of 30wt%), 15g of hydrofluoric acid (that is, 50g of hydrofluoric acid with a concentration of 30wt%).

[0064] Mix the above components evenly and add them to a hydrothermal reaction kettle with a polytetrafluoroethylene liner. In a closed environment, keep warm at 150°C for 6 hours. After cooling to room temperature, ultrasonically disperse the reaction solution for 1 hour. Perform high-speed centrifugation, filtration, and freeze-drying to obtain graphene oxyfluoride.

[0065] Step 2: Preparation of graphene oxyfluoride / polyimide composite

[0066] Weigh 1 g of graphene oxyfluoride prepared above, disperse 100 g of diphenyl ether diamine in 40 ml of N-methyl-2-pyrrolidone, ultrasonicate for 1 hour, and stir to form a slurry. When it is lowered to room temperatu...

Embodiment 2

[0070] Step 1: Preparation of graphene oxyfluoride

[0071] Configure the mixed solution as follows:

[0072] Cut and ultrasonically disperse 10 g of fluorinated graphite in 78 mL of water to obtain a uniformly dispersed dispersion containing fluorinated graphene, then add 12 g of sodium hydroxide, and stir until the sodium hydroxide is completely dissolved;

[0073] Transfer the above mixed solution to a hydrothermal reaction kettle with a polytetrafluoroethylene liner, and keep it warm at 160°C for 5 hours in a closed environment. After cooling to room temperature, ultrasonically disperse the reaction solution for 2 hours, then conduct Centrifuge, filter, and freeze-dry to obtain graphene oxyfluoride.

[0074] Step 2: Preparation of graphene oxyfluoride / polyimide composite

[0075] Weigh 3 g of graphene oxyfluoride prepared above, disperse 97 g of diphenyl ether diamine in 120 ml of N-methyl-2-pyrrolidone, ultrasonicate for 1.5 hours, and stir to form a slurry. When it is...

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Abstract

The invention discloses a fluorine oxidized graphene / polyimide composite material, a preparation method and application thereof. Active groups are contained in the surface of fluorine oxidized graphene, compared with graphene, an agglomeration phenomenon is unlikely to occur, the dispersibility inside a polymer is preferable, a relatively high mutual effect can be formed directly on the interfaceof the polymer, and the reinforced effect of the fluorine oxidized graphene inside the polymer composite material is realized; the fluorine oxidized graphene can be used for preparing the fluorine oxidized graphene / polyimide composite material; and the fluorine oxidized graphene / polyimide composite material has the characteristics of high tensile strength, low friction coefficient, low volume abrasion rate, corona resistance and the like. The fluorine oxidized graphene can be mixed with dianhydride monomers and diamine monomers, and through the steps of ultrasonic treatment, stirring, warmingand the like, the fluorine oxidized graphene / polyimide composite material is prepared and obtained. The fluorine oxidized graphene / polyimide composite material is simple and practical in preparation technology, convenient in operation and high in universality.

Description

technical field [0001] The invention belongs to the technical field of preparation of polymer-based composite materials, and in particular relates to a graphene oxyfluoride / polyimide composite material and its preparation method and application. Background technique [0002] Polyimide is an aromatic heterocyclic macromolecular compound with imide group chain link in its molecular structure. It is easy to prepare and is the best heat-resistant variety among engineering plastics. Polyimide has good fatigue resistance, flame retardancy, dimensional stability, and electrical properties. Because of its outstanding characteristics in performance and synthesis, whether it is used as a structural material or as a functional material, it has been widely used in aviation, aerospace, microelectronics, nanometer, liquid crystal, separation membrane, laser and other fields. "Problem Solvers". However, existing polyimide materials have defects such as low dielectric constant, poor proce...

Claims

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Application Information

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IPC IPC(8): C08G73/10C08K9/02C08K3/04
CPCC08G73/105C08G73/1071C08K9/02C08K3/041
Inventor 王要兵吴茂祥王文国
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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