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Modified graphene/polyimide resin composite material and preparation method thereof

A technology of polyimide resin and composite material, which is applied in the direction of fibrous filler, dyed low molecular organic compound treatment, etc., to achieve the effects of cheap and easy-to-obtain raw materials, simple and easy preparation method, and improved interface bonding performance

Inactive Publication Date: 2012-07-04
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of modified graphene / polyimide resin composite material and preparation method thereof for the deficiencies existing in the prior art, solve the dispersion problem of graphene in polyimide resin matrix and graphene The problem of interfacial bonding with the polyimide resin matrix ensures the effective transmission of stress in the composite material and realizes the compounding of the composite material on the nanometer scale, so that it has better mechanical properties, wear resistance and hydrophobicity

Method used

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  • Modified graphene/polyimide resin composite material and preparation method thereof
  • Modified graphene/polyimide resin composite material and preparation method thereof
  • Modified graphene/polyimide resin composite material and preparation method thereof

Examples

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Embodiment 1

[0032] Step 1: Modification of graphene oxide:

[0033]Weigh a certain amount of graphene oxide and put it into a three-necked round-bottom bottle, add 5ml per 1mg of graphene oxide into N,N-dimethylacetamide, and then use ultrasonic waves to disperse for 1 hour to obtain a stable and uniform dispersion graphene oxide dispersion. Add the weighed 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride, 1-hydroxy-benzo-triazole, triethylamine and ethynylaniline to the above dispersion In, the reaction was stirred at room temperature for 12h. Wherein, by molar ratio, graphene oxide: 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride: 1-hydroxyl-benzo-triazole: triethylamine: Ethynylaniline=1:1.2:1.2:20:5. The reacted dispersion was vacuum filtered to obtain a mixture, which was washed with N,N-dimethylacetamide and deionized water to remove unreacted substances and reaction by-products, and the product was dried in a vacuum oven at 50°C. Prepared modified graphene. ...

Embodiment 2

[0040] Step 1: Modification of graphene oxide:

[0041] Weigh a certain amount of graphene oxide and put it into a round-bottom three-neck bottle, add 7ml per 1mg of graphene oxide into N,N-dimethylformamide, and then use ultrasonic dispersion for 2 hours to obtain a stable and uniform dispersion graphene oxide dispersion. Add the weighed 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride, 1-hydroxy-benzo-triazole, triethylamine and phenylethynylaniline to the above dispersion solution, the reaction was stirred at room temperature for 18h. Wherein, by molar ratio, graphene oxide: 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride: 1-hydroxyl-benzo-triazole: triethylamine: Phenylethynylaniline=1:1.1:1.2:18:8. The reacted dispersion was vacuum filtered to obtain a mixture, which was washed with N,N-dimethylformamide and deionized water to remove unreacted substances and reaction by-products, and the product was dried in a vacuum oven at 40°C. Prepared modified...

Embodiment 3

[0048] Step 1: Modification of graphene oxide:

[0049] Weigh a certain amount of graphene oxide and put it into a round-bottom three-neck bottle, add 6ml of graphene oxide per 1mg into dimethyl sulfoxide, and then use ultrasonic wave to disperse for 2 hours to obtain stable and uniformly dispersed graphene oxide Dispersions. Add the weighed 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride, 1-hydroxy-benzo-triazole, triethylamine and phenylmaleamidoaniline to In the above dispersion, the reaction was stirred at room temperature for 12 h. Wherein, by molar ratio, graphene oxide: 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride: 1-hydroxyl-benzo-triazole: triethylamine: Benzylmaleamidoaniline=1:1.2:1.1:25:9. The reacted dispersion was vacuum filtered to obtain a mixture, which was washed with dimethyl sulfoxide and deionized water to remove unreacted substances and reaction by-products, and the product was dried in a vacuum oven at 40°C to obtain a modified...

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Abstract

The invention belongs to the technical field of polymer composite materials and particularly relates to a modified graphene / polyimide resin composite material and a preparation method of the modified graphene / polyimide resin composite material. The composite material comprises 95.0 to 99.9 weight percentage of polyimide resin and 0.1 to 5.0 weight percentage of modified graphene, wherein the polyimide resin is thermoset polyimide resin obtained through the heat cross-linking of prepolymers at the crosslinkable group sealing end. The preparation processes comprise graphene oxide modification, solution blending of modified graphene and crosslinkable prepolymers and the in-situ heat cross-linking of precursors. In the composite material, the modified graphene is uniformly dispersed and is in laminar arrangement distribution, and in addition, the modified graphene and the polyimide resin form the covalent bond action force through the in-situ heat cross-linking reaction, so the composite material has excellent interface combination performance. The composite material disclosed by the invention has the advantages that the mechanical performance, the wear performance and the hydrophobic performance are all greatly improved, and the composite material can be applied to the fields of aviation, spaceflight, machinery, electronics, automobiles, home appliances, offices and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer nanocomposite materials, and in particular relates to a modified graphene / polyimide resin composite material and a preparation method thereof. Background technique [0002] Polyimide is widely used in aerospace due to its excellent electrical properties, mechanical properties, excellent chemical resistance, solvent resistance, high thermal stability, small thermal expansion coefficient and good processability , electronic appliances, military equipment, automobiles, communications and other cutting-edge technology fields. However, with the expansion of the application field, the continuous improvement of the requirements for the high performance of the product and the stability of the product in various environments, the traditional polyimide resin can no longer fully meet the needs of the continuous development of various fields, and the polyimide resin must be further improved. The mechanical p...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08K9/04C08K3/04C08J3/24C08G73/10C09C1/46C09C3/08
Inventor 李同生黄挺吕仁国
Owner FUDAN UNIV
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