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Preparation method of long chain conjugated pi bond crosslikined ultra-strong high-conductivity graphene composite film

A graphene composite and composite film technology, applied in graphene, chemical instruments and methods, carbon compounds, etc., to achieve the effects of high fatigue resistance, high toughness, and high conductivity

Active Publication Date: 2019-07-02
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, there are no literature and patent reports on the preparation of ultra-tough and highly conductive graphene composite films by using long-chain conjugated π-bond cross-linking

Method used

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  • Preparation method of long chain conjugated pi bond crosslikined ultra-strong high-conductivity graphene composite film
  • Preparation method of long chain conjugated pi bond crosslikined ultra-strong high-conductivity graphene composite film
  • Preparation method of long chain conjugated pi bond crosslikined ultra-strong high-conductivity graphene composite film

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Experimental program
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Effect test

Embodiment 1

[0043] Synthesize BPDD powder at first: the pyrene methanol of 0.753g and the DDA of 0.587g are mixed evenly, then add 0.932g of EDCI, 0.198g of 4-dimethylaminopyridine (DMAP) and the DCM of 199g, then in Stir mechanically at room temperature, react in the dark for 24 hours, and then separate by rotary evaporation and silica gel column chromatography to obtain BPDD powder (0.704g, the yield is about 54.9%); prepare 2mg / mL BPDD solution: weigh 60mg of BPDD, Add 30 mL of dichloromethane (DCM), stir mechanically for 30 min in the dark, and prepare for immediate use; prepare 1 mg / mL GO aqueous solution: weigh 20 mg of graphene oxide, add 20 mL of deionized water, stir mechanically for 2 h, and then Ultrasonic dispersion in an ice-water bath for 2 minutes turned into a brown transparent solution; then the GO aqueous solution configured above was assembled into a self-supporting GO film (about 20 mg) by vacuum filtration; then it was soaked in 4 g of HI solution and reduced at room t...

Embodiment 2

[0046]Synthesize BPDD powder at first: the pyrene methanol of 0.753g and the DDA of 0.587g are stirred and mixed evenly, then add 0.932g of EDCI, 0.198g of 4-dimethylaminopyridine (DMAP) and the DCM of 199g to it, then at room temperature Under mechanical stirring, react in the dark for 24 hours, then obtain BPDD powder (0.704g, yield about 54.9%) by rotary evaporation and silica gel column chromatography; prepare 2mg / mL BPDD solution: weigh 60mg of BPDD, add In 30mL of dichloromethane (DCM), stir mechanically for 30min in the dark, and prepare for immediate use; prepare 1mg / mL GO aqueous solution: weigh 20mg of graphene oxide, add 20mL of deionized water, stir mechanically for 2h, and then Ultrasonic dispersion in a water bath for 2 minutes turned into a brown transparent solution; then the GO aqueous solution configured above was assembled into a self-supporting GO film (about 20 mg) by vacuum filtration; then soaked in 4 g of HI solution, reduced at room temperature for 6 ho...

Embodiment 3

[0049] Synthesize BPDD powder at first: the pyrene methanol of 0.753g and the DDA of 0.587g are stirred and mixed evenly, then add 0.932g of EDCI, 0.198g of 4-dimethylaminopyridine (DMAP) and the DCM of 199g to it, then at room temperature Under mechanical stirring, react in the dark for 24 hours, then obtain BPDD powder (0.704g, yield about 54.9%) by rotary evaporation and silica gel column chromatography; prepare 2mg / mL BPDD solution: weigh 60mg of BPDD, add In 30mL of dichloromethane (DCM), stir mechanically for 30min in the dark, and prepare for immediate use; prepare 1mg / mL GO aqueous solution: weigh 20mg of graphene oxide, add 20mL of deionized water, stir mechanically for 2h, and then Ultrasonic dispersion in a water bath for 2 minutes turned into a brown transparent solution; then the GO aqueous solution configured above was assembled into a self-supporting GO film (about 20 mg) by vacuum filtration; then soaked in 4 g of HI solution, reduced at room temperature for 6 h...

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Abstract

The invention relates to a preparation method of a long chain conjugated pi bond crosslikined ultra-strong high-conductivity graphene composite film. The preparation method comprises following steps:pyrenemethanol and 10,12-docosadiynedioic acid (DDA) are stirred for uniform mixing, and then 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDCI), 4-dimethylaminopyridine (DMAP) and dichloromethane (DCM) are added, stirring reaction is carried out for a period of time to obtain 10,12-docosadienoic acid dipyrene methyl ester (BPDD); a graphene oxide (GO) solution is subjected to vacuum filtration to obtain a self-supporting GO film; the self-supporting GO film is subjected to chemical reduction, is immersed in a BPDD solution, and finally is subjected to ultraviolet light irradiation so as to obtain the long chain conjugated pi bond crosslikined graphene (piBG) composite film. The highest tensile strength of the piBG film of 1054 MPa, the corresponding toughness is36 MJ / m3, and the electrical conductivity of 1192 S / cm. In addition, the optimized piBG film has excellent fatigue resistance and excellent electromagnetic shielding effectiveness.

Description

technical field [0001] The invention relates to a preparation method of a long-chain conjugated π-bond cross-linked super-tough and highly conductive graphene composite film, which belongs to the field of nanocomposite material preparation. Background technique [0002] Since graphene has wide applications in aerospace and flexible electronics (Adv. Mater. 2016, 28, 7862.), it is of great significance to transform mineral-abundant graphite into high-performance graphene films at room temperature. The transformation process usually involves the exfoliation of graphite, reassembly and subsequent reduction process. Studies have shown that oxidation at low temperature (~0°C) can efficiently exfoliate graphite into high-quality GO nanosheets (Adv. Mater. 2013, 25, 3583.); The method of GO into rGO (Carbon 2010, 48, 4466.), which not only has less damage to the microstructure of graphene film than other chemical reduction methods, but also is cheaper than the high-temperature cal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C08F138/00
CPCC01B32/184C01B2204/22C08F138/00
Inventor 程群峰万思杰江雷
Owner BEIHANG UNIV