Preparation method of all-carbon composite film and product of all-carbon composite film

A carbon composite and product technology, which is applied in the field of preparation of all-carbon composite films, can solve problems such as poor bonding between film layers, and achieve the effects of reducing influence, simple steps and ensuring uniformity.

Inactive Publication Date: 2018-11-02
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

The one-step sequential suction filtration process enables the film-forming materials carbon nanotubes and graphene oxide / carbon nanotubes to evenly stack each other to ensure the quality of the film formation. The van der Waals force between the carbon nanomaterials after thermal reduction further ensures the tightness of its structure. Combination, thus solving the problem of poor bonding between film layers

Method used

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  • Preparation method of all-carbon composite film and product of all-carbon composite film
  • Preparation method of all-carbon composite film and product of all-carbon composite film
  • Preparation method of all-carbon composite film and product of all-carbon composite film

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preparation example Construction

[0034] A method for preparing an all-carbon composite membrane, comprising the following steps:

[0035] (1) Ultrasonic treatment with a cell disruptor to obtain a carbon nanotube dispersion;

[0036] (2) Adopt the improved Hummers method to synthesize graphene oxide, this method is prior art, no longer exhaustive description at this, graphene oxide is formulated as the water dispersion of certain concentration; Then add the carbon nanotube of certain quality, make The mass ratio of carbon nanotubes to graphene oxide is 0 to 1, and a graphene oxide / carbon nanotube dispersion is obtained by ultrasonic treatment with a cell crusher;

[0037] (3) By suction filtration, the carbon nanotube dispersion prepared by a certain volume step (1) and the graphene oxide / carbon nanotube dispersion prepared by a certain volume step (2) are successively suction filtered, and then the prepared film is dried deal with;

[0038] (4) performing thermal reduction treatment on the composite film p...

Embodiment 1

[0047] (1) Ultrasonic treatment with a cell crusher was used to obtain a carbon nanotube dispersion. In the dispersion, 10 mg of carbon nanotubes and 100 ml of dispersant ethanol were used. The parameters were 400 W power, 60 min, and ice-water bath.

[0048] (2) Get 0.6mg graphene oxide to prepare dispersion liquid in 50ml deionized water; Add 0.4mg carbon nanotube then, make the mass ratio of carbon nanotube and graphene oxide be 0.67, graphene oxide and carbon nanotube dispersion concentration 0.02mg / ml; use a cell crusher to ultrasonically process the dispersion, the parameters are power 300W, time 30min, ice water bath;

[0049] (3) by suction filtration, successively suction filter the carbon nanotube dispersion prepared by step (1), the graphene oxide / carbon nanotube dispersion prepared by 20ml step (2), and then dry the prepared film;

[0050] (4) Heat the membrane prepared in step (3) to 300°C at a heating rate of 5°C / min in an argon / hydrogen (hydrogen 5%) atmosphere,...

Embodiment 2

[0053] (1) Ultrasonic treatment with a cell disruptor was used to obtain a carbon nanotube dispersion. In the dispersion, 10 mg of carbon nanotubes and 100 ml of ethanol were used. The parameters were 400 W power, 60 min, and an ice-water bath.

[0054] (2) Get 0.6mg graphene oxide to prepare dispersion liquid in 50ml deionized water; Then add 0.4mg carbon nanotube, make the mass ratio of carbon nanotube and graphene oxide be 0.67, graphene oxide / carbon nanotube dispersion concentration 0.02mg / ml; use a cell crusher to ultrasonically process the dispersion, the parameters are power 300W, time 30min, ice water bath;

[0055] (3) by suction filtration, successively suction filter the carbon nanotube dispersion prepared by (1), the graphene oxide / carbon nanotube dispersion prepared by 20ml step (2), and then dry the film prepared;

[0056] (4) Heat the membrane prepared in step (3) to 150°C at a heating rate of 1°C / min in an argon / hydrogen (hydrogen 5%) atmosphere, and keep it wa...

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Abstract

The invention belongs to the field of preparation of composite films and discloses a preparation method of an all-carbon composite film. The method comprises the following steps: firstly, taking graphite as a raw material, and controllably synthesizing graphene oxide by adopting an improved Hummers method; effectively dispersing carbon nanotubes in a water solution through graphene oxide containing abundant oxygen functional groups, so as to form a stable graphene oxide / carbon nanotube dispersion solution; then forming a film through a method for sequentially filtering a carbon nanotube dispersion solution and the graphene oxide / carbon nanotube dispersion solution in one step in vacuum; finally, carrying out heat treatment in a reduction atmosphere to obtain the all-carbon composite film.The invention further discloses a product obtained by the preparation method and application of the product. According to the preparation method provided by the invention, the controllability of preparation technology parameters is strong, the operation is simple and feasible and the structure of the obtained all-carbon composite film is complete; the binding force between a film base layer and astopping layer is strong; the all-carbon composite film has a very good separation effect on dyestuff and can be used for efficiently intercepting the dyestuff in water; the all-carbon composite filmhas a very good application prospect in the aspect of separating the dyestuff.

Description

technical field [0001] The invention belongs to the field of composite membrane preparation, and more specifically relates to a method for preparing an all-carbon composite membrane and a product thereof. Background technique [0002] Membranes can be divided into isotropic membranes and anisotropic membranes according to their structure. Among the anisotropic membranes, there is a type of composite membrane, which is mainly composed of two parts-the barrier layer and the base layer. Among them, the barrier layer is a thin film with a thickness of micro / nano level, and the separation effect of the film is basically determined by the barrier layer; while the base layer mainly plays the role of mechanical support, and it is mainly made of some polymer materials. have to. [0003] Carbon material separation membranes have the characteristics of easy control of pore size and morphology, long life, small deformation during filtration, high temperature resistance, strong chemical...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/12B01D71/02B01D61/00C02F1/44C02F101/30
CPCB01D61/00B01D67/0039B01D69/12B01D71/021C02F1/44C02F2101/308
Inventor 刘兴国张文军徐鸣
Owner HUAZHONG UNIV OF SCI & TECH
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