Modified graphene and preparation method thereof

A graphene and biomass graphene technology, applied in the chemical industry, can solve problems such as self-agglomeration and graphene surface inertness, and achieve the effects of convenient transportation and difficult dispersion.

Active Publication Date: 2017-06-13
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of preparation method of modified graphene

Method used

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  • Modified graphene and preparation method thereof
  • Modified graphene and preparation method thereof
  • Modified graphene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Take 1g of biomass graphene A, add 200g of water and stir to form a uniform slurry, then add TEMPO catalytic oxidation composition (0.01gTEMPO, 1g sodium hypochlorite, 0.05g sodium bromide) to stir the reaction, pass 0.5wt% hydrogen Sodium oxide solution and 1wt% glacial acetic acid solution are adjusted to keep the pH of the reaction system in the range of 10.5-11, and when the pH no longer changes, the reaction is stopped to obtain a suspension, and the reaction time is 2.5 hours.

[0056] (2) Filter the suspension obtained in step (1), wash and centrifuge several times with water, each centrifugal speed is 1000rpm, each centrifugal time is 5min, finally wash until the pH of the suspension is neutral, after drying The modified graphene powder is obtained.

Embodiment 2

[0058] The difference from Example 1 is that the contents of each component of the TEMPO catalytic oxidation composition are different, specifically: 0.0005g TEMPO, 0.1g sodium hypochlorite, and 0.005g sodium bromide.

Embodiment 3

[0060] The difference from Example 1 is that the contents of each component of the TEMPO catalytic oxidation composition are different, specifically: 0.005g TEMPO, 0.75g sodium hypochlorite, and 0.1g sodium bromide.

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Abstract

The invention provides modified graphene and a preparation method thereof. The preparation method comprises the following steps of performing catalyzing and oxidizing reaction on a graphene matter under the action of a TEMPO catalyzing and oxidizing system, until the pH (potential of hydrogen) value of the reaction system is constant or the alcohol matter is added to react, washing and drying, wherein the graphene matter is selected from one or multiple of graphene, graphene oxide and biomass graphene, preferably graphene oxide and/or biomass graphene; preferably, the pH value of the catalyzing and oxidizing reaction is controlled to 2 to 13, preferably between 3.5 and 6 or between 9.5 and 11.5. The preparation method can solve the problems of surface sluggishness and self-agglomeration of the graphene.

Description

technical field [0001] The invention relates to the technical field of chemical engineering, in particular to a modified graphene and a preparation method thereof. Background technique [0002] Graphene is another new type of carbon nanomaterial discovered after carbon nanotubes. Graphene has been a research hotspot since its discovery in 2004, and it consists of a single layer of carbon atoms through sp 2 The six-membered ring honeycomb network structure formed by hybrid orbitals has excellent mechanical, electrical, thermal and optical properties, and has broad application prospects in battery materials, energy storage materials, electronic devices, composite materials and other fields. [0003] However, how to maintain the effective dispersion of graphene in the polymer matrix when it is applied in composite materials is an urgent problem to be solved. Due to the inert state of the surface of the graphene material, high chemical stability, weak interaction with other me...

Claims

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Application Information

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IPC IPC(8): C01B32/194C01B32/198
CPCC01B2204/32
Inventor 张金柱刘顶郑应福王鹏辉韩东
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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