Graphene/graphene oxide composite membrane and preparation method thereof

A graphene composite and graphene film technology, which is applied in the field of graphene materials, can solve the problems of good bonding of composite films and poor bonding of two-layer materials, and achieve good mechanical properties, good repeatability, and strong response characteristics.

Inactive Publication Date: 2011-08-31
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: In order to solve the shortcoming of poor bonding of two-layer materials existing in the prior art, the purpose of the invention is to provide a graphene / graphene oxide composite film and its preparation method, because the two layers of materials are graphene-based materials, the prepared composite film has good bonding

Method used

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  • Graphene/graphene oxide composite membrane and preparation method thereof
  • Graphene/graphene oxide composite membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0017] In the first step, weigh 0.01 gram of graphite oxide, put it into a beaker filled with 1000 grams of water, and ultrasonicate for 30 minutes to obtain a uniform graphite oxide solution.

[0018] In the second step, the obtained graphene oxide aqueous solution is placed in a suction filtration device, and the graphene oxide film is obtained by using negative pressure suction.

[0019] The third step is to take 100 grams of graphene chloroform solution with a carbon-oxygen ratio of 5 and a mass concentration of 0.02% (graphene) and place it in the above-mentioned suction filtration device equipped with a graphene oxide membrane, and use negative pressure suction filtration to obtain graphite ene / graphene oxide film, the thickness of both films is 10 microns. After testing, the film's response time to temperature and humidity is less than 1 second, and it can be bent and stretched more than 1,000 times.

Embodiment 2

[0021] In the first step, weigh 1 gram of graphite oxide, put it into a beaker filled with 10 grams of alcohol, and ultrasonicate for 5 hours to obtain a uniform graphite oxide solution.

[0022] In the second step, the obtained graphene oxide alcohol solution is placed in a glass petri dish and evaporated under normal pressure at an evaporation temperature of 100 degrees Celsius to obtain a graphene oxide film.

[0023] In the third step, take 10 grams of a graphene aqueous solution with a carbon-to-oxygen ratio of 20 and a mass concentration of 10% (graphene), place it in the above-mentioned petri dish equipped with a graphene oxide film, and use negative pressure to evaporate to obtain graphene / oxide Graphene film, the thickness of the two films is 0.8mm and 0.4mm respectively. After testing, the film's response time to temperature and humidity is less than 1.5 seconds, and it can be bent and stretched more than 1,000 times.

Embodiment 3

[0025] In the first step, 0.5 g of graphite oxide is weighed, put into a beaker filled with 50 g of chloroform, and ultrasonicated for 10 minutes to obtain a uniform graphite oxide solution.

[0026] In the second step, the obtained graphene oxide chloroform solution is placed in an atmospheric filter to obtain a graphene oxide film.

[0027] In the third step, 10 grams of a graphene alcohol solution with a carbon-to-oxygen ratio of 50 and a mass concentration of 1% (graphene) is placed in the above-mentioned filter equipped with a graphene oxide film, and evaporated at atmospheric pressure to obtain graphene / Graphene oxide film, the thickness of the two films is 100 microns and 50 microns respectively. After testing, the film's response time to temperature and humidity is less than 0.8 seconds, and it can be bent and stretched more than 1,000 times.

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Abstract

The invention provides a graphene / graphene oxide composite membrane which is composed of a graphene layer and a graphene oxide layer, wherein the thickness of each layer is 50 nanometers-1 millimeter. The preparation method of the graphene / graphene oxide composite membrane comprises the following steps of: putting a graphene oxide solution into a container for filtering or evaporating to obtain agraphene oxide membrane; and putting a graphene solution into the container containing the graphene oxide membrane for filtering or evaporating to obtain the graphene / graphene oxide composite membrane. The membrane has excellent mechanical properties and has a very strong response characteristic to temperature or humidity; and by the characteristic, the graphene / / graphene oxide composite membranecan be applied on a micro-actuator or sensor.

Description

[0001] technical field [0002] The invention belongs to the technical field of graphene materials, in particular to a graphene / graphene oxide composite film and a preparation method thereof. Background technique [0003] The advent of carbon nanotubes and graphene has stimulated great interest in applying their physical and mechanical properties to devices. They have been proved theoretically and experimentally to have high hardness and strength. It also has high electrical and thermal conductivity. Unique mechanical and physical properties make them extensively studied in a wide variety of devices. [0004] Many research groups have made remarkable achievements in micro-actuators of carbon nanotubes, but there are relatively few studies on micro-actuators and sensors based on all-graphene materials. Small 2009, 6, 210 introduced a carbon nanotube-based / Graphene oxide composite film material, this material shows good temperature and humidity sensing performance. Howe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00
Inventor 尹奎波毕恒昌孙立涛孙俊徐峰万能
Owner SOUTHEAST UNIV
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