Preparation method for graphene heating film

A graphene heating film and graphene technology, applied in the field of preparation of graphene heating film, can solve the problems of complex preparation process and low heating efficiency, and achieve the effects of simple production and preparation process, high heating efficiency and uniform product

Active Publication Date: 2014-02-26
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the disadvantages of complex preparation process and low heating efficiency of the existing commonly used graphene film, the object of the present invention is a prepara...

Method used

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  • Preparation method for graphene heating film
  • Preparation method for graphene heating film
  • Preparation method for graphene heating film

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] The preparation process of the graphene heating film of the present invention is as follows: the graphene powder is uniformly dispersed in an organic solvent to obtain graphene with a concentration of 0.05mg / ml-0.5mg / ml (preferably 0.1mg / ml-0.3mg / ml) Colloidal suspension; the graphene is evenly covered on the organic filter membrane or water filter membrane by vacuum filtration, and then after natural drying or heating drying, the graphene film is separated by mechanical peeling, soaking or organic solvent dissolution and filter membrane to obtain a uniform and stable graphene film. Electrodes are added to the graphene film, and heat can be generated by applying voltage.

[0025] The present invention adopts a conventional vacuum suction filtration device, which includes: a 300ml Buchner funnel, a glass sand core filter, a 1000ml-2000ml suction filter bottle and connecting flexible pipes and clamps, and the vacuum pump used can be a circulating water vacuum pump Or an ...

Embodiment 1

[0030] Weigh 9.375 mg of graphene powder and put it in a beaker, add 50 mL of absolute ethanol reagent, and ultrasonically disperse for 1 h to obtain a homogeneous and stable graphene colloidal suspension with a concentration of 0.1875 mg / mL. The graphene colloidal suspension is placed on the microporous filter membrane in the vacuum filtration device, using a polyvinylidene fluoride filter membrane with a pore size of 0.45 μm, the pressure of the vacuum filtration is 0.08 MPa, and the time is 15 minutes. After the suction filtration is completed, the graphene film and the filter membrane are placed in a 45° C. drying oven for 24 hours to dry, and then the graphene film is obtained by mechanical peeling. From figure 2 (a) and image 3 It can be seen that the surface of the graphene film obtained by vacuum filtration is even and smooth, and the sheets overlap tightly.

[0031] The surface density of the graphene film that utilizes this method to make is 15g / m 2 , the thickn...

Embodiment 2

[0033] The difference from Example 1 is that 18.750 mg of graphene powder was weighed and placed in a beaker, 100 mL of N,N-dimethylformamide reagent was added, and ultrasonically dispersed for 1 hour to obtain a homogeneous and stable powder with a concentration of 0.1875 mg / mL. graphene colloidal suspension. The graphene colloidal suspension is placed on the microporous filter membrane in the vacuum filtration device, using a polytetrafluoroethylene filter membrane with a pore size of 0.45 μm, the pressure of the vacuum filtration is 0.15 MPa, and the time is 35 minutes. After the suction filtration is completed, place the graphene film together with the filter membrane in a drying oven at 100° C. for 38 hours, and then adopt a mechanical stripping method to obtain a graphene film. figure 2 (b) It can be seen that the surface of the obtained graphene film is uniform and flat, and the sheets overlap closely.

[0034] The surface density of the graphene film that utilizes th...

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Abstract

The invention belongs to the field of carbon materials, and particularly relates to a preparation method for a graphene heating film. Graphene powder is evenly scattered in an organic solvent by using an ultrasonic method, a stirring method and other methods to obtain a graphene solution with the concentration of 0.05mg/ml to 0.5mg/ml, the graphene evenly covers an organic filter film or a water-attributed filter film through a suction filtration method, the grapheme film and the filter film are separated through a mechanical stripping method or a soaking method or an organic solvent dissolving method, the graphene thin film is obtained, electrodes are added to the graphene thin film, and heat can be generated by applying voltages on the graphene thin film. According to the preparation method for the graphene heating film, the unique two-dimensional nano-structure, the characteristic of the large ratio of thickness to radial dimension and the characteristic of the high specific surface area of the graphene are utilized, through the preparation technology, evenly communicated conductive networks are formed among graphene sheet layers, and much heat can be generated by applying low voltages (1-10V). The preparation method for the graphene heating film has the advantages that the preparation process is simple and easy to control and free of pollution, and the size is adjustable, and the preparation method for the graphene heating film is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of carbon materials, in particular to a method for preparing a graphene heating film. Background technique [0002] Electric heating technology has significant advantages such as clean energy, high heat conversion efficiency, and convenient pavement design, and has been widely used in modern architecture, heating engineering, decoration and other fields. In view of the shortcomings of low efficiency of traditional electric heating technology, the development of high-performance carbon-based heating materials with low resistance, high thermal conductivity, and high heat resistance stability is becoming an inevitable trend of future development. [0003] Since the first preparation of graphene in 2004, the excellent physical properties of graphene have attracted the attention of many scholars. Graphene has excellent electrical conductivity, and the electron mobility is as high as 2×10 5 cm 2 v -1 the s -1 , which i...

Claims

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Application Information

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IPC IPC(8): H05B3/14H05B3/84
Inventor 曾尤郑雅轩王函英哲裴嵩峰任文才成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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