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A kind of functionalized graphene airgel and preparation method thereof

An aerogel and functional technology, applied in the field of composite materials, functionalized graphene aerogels and their preparation, can solve the problems of increasing the difficulty and cost of production, reducing the efficiency of production, and being difficult to meet the requirements of industrialized and efficient production, and the like, Achieve the effect of low cost, simple and efficient preparation process

Active Publication Date: 2019-04-16
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, heat treatment at high temperature is required during the preparation process, which greatly reduces the production efficiency, increases the difficulty and cost of production, and is difficult to meet the requirements of industrialized high-efficiency production.

Method used

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  • A kind of functionalized graphene airgel and preparation method thereof
  • A kind of functionalized graphene airgel and preparation method thereof
  • A kind of functionalized graphene airgel and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0020] A functionalized graphene airgel with adjustable properties and a preparation method thereof, the process of which is as follows figure 1 , including the following steps:

[0021] (1) Graphite oxide (GO) was added into deionized water, and a uniform dispersion was obtained by ultrasonication for 30 minutes, and the concentration of graphite oxide in the dispersion was controlled to be 2-4 mg / mL.

[0022] (2) Calculated according to the mass ratio, that is, the mass ratio of MPS:GO is 1:30-20:30, the MPS solution is added to the obtained GO dispersion, and stirred for 10 minutes.

[0023] (3) Move the fully stirred mixed solution into a reaction kettle, seal it, heat at a controlled temperature of 150-200° C. for 4-8 hours, and freeze-dry the product to obtain a functionalized graphene airgel with adjustable properties.

[0024] (4) Perform Raman spectroscopic analysis on the prepared functionalized graphene airgel with adjustable properties.

[0025] (5) Analyze the p...

Embodiment 1

[0029] Functionalized graphene airgel with adjustable performance and preparation method thereof (specific process such as figure 1 shown):

[0030] Add 30mg of graphite oxide (GO) into a beaker with 10mL of deionized water, and ultrasonicate for 30min to obtain a uniform dispersion. Transfer 10 uL of the MPS solution to the beaker containing the GO solution and stir for 10 min. The fully stirred mixed solution was moved to a reaction kettle, sealed, heated at a controlled temperature of 180° C. for 6 hours, and the product was freeze-dried to obtain a functionalized graphene airgel with adjustable properties.

[0031] The Raman spectrogram of the functionalized graphene airgel with adjustable performance prepared in the above-mentioned embodiment 1, as figure 2 As shown, I D / I G =1.15, indicating that graphite oxide was reduced to graphene.

[0032] The scanning electron micrograph of the performance adjustable functionalized graphene airgel prepared in the above-menti...

Embodiment 2

[0036] Add 30mg of graphite oxide (GO) into a beaker with 10mL of deionized water, and ultrasonicate for 30min to obtain a uniform dispersion. Transfer 20 uL of the MPS solution to the beaker containing the GO solution and stir for 10 min. The fully stirred mixed solution was moved to a reaction kettle, sealed, heated at a controlled temperature of 200° C. for 8 hours, and the product was freeze-dried to obtain a functionalized graphene airgel with adjustable properties.

[0037] The Raman spectrogram of the performance-tunable functionalized graphene airgel prepared in above-mentioned embodiment 2, I D / I G =1.22, indicating that graphite oxide is completely reduced to graphene.

[0038] The scanning electron microscope image of the functionalized graphene aerogel with adjustable properties prepared in the above example 2 shows that the graphene aerogel has a macroporous structure exceeding 100 μm, and there is a macroporous structure and a disordered sheet stacking structu...

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Abstract

The invention discloses a graphene aerogel with adjustable properties and a preparation method thereof. The aerogel is prepared according to the following steps: ultrasonically dispersing graphite oxide, thereby forming dispersion liquid; adding a (3-sulfydryl propyl) trimethoxy silane solution, mixing and then uniformly stirring; transferring into a reaction kettle; reacting under an airtight state at 150-200 DEG C and then performing freeze drying. According to the invention, (3-sulfydryl propyl) trimethoxy silane is taken as a property regulator and a two-step method is adopted for preparing the functionalized graphene aerogel with adjustable wide density scope (3.5-64mgcm<3>) and adjustable hydrophobicity (WCA more than 86 degrees but less than 142 degrees).

Description

technical field [0001] The invention relates to a functionalized graphene airgel with adjustable performance and a preparation method thereof, belonging to the field of composite material research. Background technique [0002] Due to its density, large porosity, and large specific surface area, airgel has broad application prospects in the fields of organic matter adsorption and heavy metal adsorption. However, there are still many problems to be solved in the process of airgel preparation. On the one hand, in order to obtain the optimal performance, a complicated performance optimization process is often required, which greatly reduces the production efficiency and production cost of performance-controllable aerogels, making it difficult to apply them on a large scale. On the other hand, although the performance of airgel can be adjusted through some simple processes, it is difficult to meet the optimal conditions in terms of performance, which limits the scope of applica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
CPCC01P2002/82C01P2004/03C01P2006/10C01P2006/16
Inventor 姜炜周帅谢覃王玉姣刘杰周翔张宁郁榴华钱丹林刘丹阳戴梦杰姜宽李凤生
Owner NANJING UNIV OF SCI & TECH
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