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Optimized preparation method of oxidized graphite paper

A technology of graphite paper and graphite, applied in the field of nanomaterials, can solve the problems that graphite oxide paper is not suitable for industrial production, and its preparation has not been reported.

Inactive Publication Date: 2011-01-19
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the graphite oxide paper obtained by vacuum filtration is not suitable for industrial production, and it is necessary to find a simple and easy method to realize the large-scale preparation of graphite oxide paper
Although Titelman GI et al. wrote in Carbon, volume 43, pages 641-649, that graphene oxide dispersions can be coated and dried into graphite oxide films, but the preparation of complete large-area self-supporting graphite oxide paper with considerable strength has not been seen. to report

Method used

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  • Optimized preparation method of oxidized graphite paper
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  • Optimized preparation method of oxidized graphite paper

Examples

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Effect test

Embodiment 1

[0029] Such as figure 1 Shown, the large-scale preparation method of the graphite oxide paper described in the present embodiment comprises the following steps:

[0030] The first step, at room temperature, add 10g of 500 mesh natural flake graphite into a 1000mL flask, stir mechanically, add 5g of sodium nitrate, continue stirring for 1h, cool to 0°C in an ice bath, and then, within 5h, batch Add 30g of potassium permanganate, keep the temperature of the reaction system not higher than 15°C, remove the ice bath, heat in a water bath to raise the temperature of the reaction system to 35±3°C, fully stir the reaction for 2 hours, and obtain a brown graphite suspension.

[0031] In the second step, 500 mL of ice water was added into the flask to quench the reaction, and then 35 mL of hydrogen peroxide aqueous solution with a mass percent concentration of 30% was slowly added to obtain a bright yellow graphene oxide suspension.

[0032] The third step is to filter the graphite ox...

Embodiment 2

[0035] Such as figure 1 Shown, the mechanical reinforcement method of the graphite oxide paper described in this embodiment comprises the following steps:

[0036] The first step, at room temperature, add 10g of 500 mesh natural flake graphite into a 1000mL flask, stir mechanically, add 5g of sodium nitrate, continue stirring for 1h, cool to 0°C in an ice bath, and then, within 5h, batch Add 30g of potassium permanganate, keep the temperature of the reaction system not higher than 15°C, remove the ice bath, heat in a water bath to raise the temperature of the reaction system to 35±3°C, fully stir the reaction for 2 hours, and obtain a brown graphite suspension.

[0037] In the second step, 500 mL of ice water was added into the flask to quench the reaction, and then 35 mL of hydrogen peroxide aqueous solution with a mass percent concentration of 30% was slowly added to obtain a bright yellow graphene oxide suspension.

[0038] The third step is to filter the graphite oxide su...

Embodiment 3

[0041] The steps are as in Example 1. During the process of adding potassium permanganate, the cooling temperature is lowered to -10° C., and the average size of the obtained flake graphene increases by 50%.

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Abstract

The invention relates to an optimized preparation method of oxidized graphite paper, belonging to the technical field of nanomaterials. The preparation method comprises the following steps: preparing graphene oxide by adopting hydrogen peroxide; then, adding a glutaric dialdehyde solution into the suspension of the graphene oxide; and casting and drying on a substrate after stirring to obtain the oxidized graphite paper with enhanced mechanical properties. The method of the invention is simple and easy, is suitable for large-scale preparation, and can realize large-scale preparation of the oxidized graphite paper. By adding a small amount of cross-linking agent, the obtained oxidized graphite paper with enhanced mechanical properties has regular structure, uniform height and enough mechanical strength.

Description

technical field [0001] The invention relates to a method in the technical field of nanometer materials, in particular to an optimized preparation method of graphite oxide paper. Background technique [0002] Graphene, as a two-dimensional atomic crystal material composed of a single layer of carbon atoms closely arranged, due to its unique quantum effects and excellent electrical, thermal and mechanical properties, will be used in future nanoelectronic devices and integrated circuits, flexible electronic devices, ultra- New electronic devices such as high-sensitivity sensors, composite materials, solar cells, supercapacitors, and hydrogen storage materials have broad application prospects. Regarding the preparation method of graphene, the preparation of graphene by the chemical dispersion method has become a hot topic in the preparation of graphene due to its advantages of high yield, simple preparation method and low cost compared with the physical method. . [0003] Usin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 胡南滔杨志魏浩张亚非高润纲
Owner SHANGHAI JIAO TONG UNIV
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