Preparation method of three-dimensional ordered macroporous composite material

A composite material, three-dimensional ordered technology, applied in the direction of nanotechnology, chemical instruments and methods, carbon compounds, etc. for materials and surface science, can solve the problems that cannot reflect the performance advantages of carbon nanotubes, large pores are easy to deform and collapse, and flexibility Poor support and other problems, to achieve the effect of increasing the electrochemical active area, increasing the loading capacity, and increasing the adsorption capacity

Active Publication Date: 2012-10-24
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Application Information

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Problems solved by technology

However, the length of carbon nanotubes is usually much longer than the diameter, and the flexibility is very good, but the support is poor. Therefore, the porous carbon materials prepared are mainly microporous and mesoporous materials, and the large pores in the material are easy to deform and collapse.
In order to maintain the macroporous structure of carbon nanotube materials, carbon nanotubes are usually mixed with other carbonizable materials, and composite materials are obtained through high-temperature carbonization. The content of carbon nanotubes in composite materials is low, which cannot reflect the performance of carbon nanotubes. Advantage

Method used

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  • Preparation method of three-dimensional ordered macroporous composite material
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  • Preparation method of three-dimensional ordered macroporous composite material

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preparation example Construction

[0029] The preparation method of this three-dimensional ordered macroporous composite material comprises the following steps:

[0030] 1. Mix carbon nanotubes and sacrificial templates in a dispersant;

[0031] II. Co-precipitating the carbon nanotubes described in step I and the sacrificial template;

[0032] III. Submerging the coprecipitate of the carbon nanotubes and the sacrificial template described in step II in a binder to obtain a binder;

[0033] IV. After drying the adhesive in step III, remove the sacrificial template with an etching solution.

Embodiment 1

[0035] In this implementation, multi-walled carbon nanotubes and polystyrene are used as sacrificial modules, and the carbon nanotube dispersant is prepared with ionic surfactant sodium dodecylbenzenesulfonate (LAS) and deionized water, wherein the mass content of LAS is 1 %. In addition, polyvinyl alcohol is used as the binder, and tetrahydrofuran is used as the etchant.

[0036] In the first step, take 2 mg of multi-walled carbon nanotubes and add them into 2 mL of dispersant, and disperse the multi-walled carbon nanotubes evenly with an ultrasonic instrument. Then take 3.4 mg of polystyrene (PS) balls with a diameter of 2 microns and add them into the dispersed carbon nanotube solution, and use an ultrasonic instrument to disperse the PS balls evenly.

[0037] In the second step, the mixture of carbon nanotubes, PS balls and dispersant is diluted 100 times with deionized water, and then dispersed evenly with an ultrasonic device. Then immediately filter the diluted mixtur...

Embodiment 2

[0040] Compared with Example 1, the difference of this example is that a deionized aqueous solution with a mass content of 0.2% polyvinyl alcohol (PVA) is used as a binder. The single-walled carbon nanotubes and PS spheres were mixed and placed in the binder, and heated to 90°C for 2 hours. Finally, acetone was used as an etchant to remove the PS spheres.

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Abstract

The invention relates to the field of nano material manufacturing and provides a preparation method of a three-dimensional ordered macroporous composite material. The preparation method comprises the following steps: (I) mixing carbon nano tubes and sacrifice templates in a dispersing agent; (II) coprecipitating the carbon nano tubes and the sacrifice templates in the step (I); (III) putting a coprecipitate obtained in the step (II) in a bonder for soakage to obtain a bonding substance, wherein the bonder is not subjected to a chemical reaction with the carbon nano tubes, and the sizes and the shapes of the sacrifice templates are not changed; (IV) drying the bonding substance obtained in the step (III), and then removing the sacrifice templates with corrosive liquid, wherein the corrosive liquid is not reacted with the bonder. The preparation method has the advantages of simple preparation technology and preparation process, and no high-temperature treatment or amorphous carbon is needed. Due to the high-content carbon nano tube components, the reaction system is higher in electric conductivity, and the catalyst carrier quantity, the electrochemical active area and the adsorption quantity of an adsorbent can be improved.

Description

technical field [0001] The invention relates to the technical field of nanomaterial production, in particular to a method for preparing a macroporous composite material in the field of porous carbon materials. Background technique [0002] According to the pore size distribution, porous carbon materials can be divided into: macroporous (>50nm), mesoporous (2~50nm), and microporous (<2nm) carbon materials. According to the different forms of carbon, it can be divided into: amorphous carbon, graphite, graphene, carbon nanotubes, carbon fibers, etc. Porous carbon materials usually have high specific surface area, high pore volume, low density, special thermal conductivity and dielectric properties, and can be surface modified. Depending on the pore size, carbon structure, and carbon surface properties, porous carbon materials can be used as catalyst supports, pollutant adsorption supports, energy storage electrodes, heat insulation materials, and filter materials. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00C01B32/168
Inventor 葛军卢威陈立桅
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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