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Preparation method of water-soluble high-conductivity graphene

A high-conductivity, graphene technology, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of water-soluble graphene conductivity decline, etc., to improve water-solubility, high conductivity, and promote application. Effect

Pending Publication Date: 2021-10-15
SHENZHEN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the electrical conductivity of the water-soluble graphene prepared by the existing method decreases, and provide a kind of preparation method of the water-soluble high-conductivity graphene

Method used

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  • Preparation method of water-soluble high-conductivity graphene
  • Preparation method of water-soluble high-conductivity graphene
  • Preparation method of water-soluble high-conductivity graphene

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specific Embodiment approach 1

[0023] Specific embodiment one: the preparation method of a kind of water-soluble high-conductivity graphene of present embodiment is to be finished according to the following steps:

[0024] 1. Add graphene powder into concentrated sulfuric acid and disperse it ultrasonically to obtain suspension A;

[0025] Second, the preparation of NaOH aqueous solution:

[0026] 3. Add p-aminobenzenesulfonic acid to the NaOH aqueous solution, and then stir until the p-aminobenzenesulfonic acid is completely dissolved to obtain solution B;

[0027] 4. Preparation of NaNO 2 Aqueous solution:

[0028] 5. Mix solution B and NaNO in an ice-water bath 2 The aqueous solution is poured into the suspension A, and then stirred to obtain the suspension C;

[0029] 6. Dilute the suspension C with water, stir again, and finally vacuum filter to obtain a solid substance;

[0030] Seventh, the solid matter is dried to obtain water-soluble high-conductivity graphene.

specific Embodiment approach 2

[0031] Embodiment 2: This embodiment differs from Embodiment 1 in that: the power of the ultrasonic dispersion described in step 1 is 50W-200W, and the time of ultrasonic dispersion is 0.2h-1h. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0032] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the massfraction of the concentrated sulfuric acid described in the step one is 98%; The quality of the graphene powder described in the step one and the concentrated sulfuric acid The volume ratio is (10mg ~ 100mg): (1mL ~ 5mL). Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of water-soluble high-conductivity graphene, and relates to a preparation method of high-conductivity graphene. The invention aims to solve the problem that the conductivity of water-soluble graphene prepared by the existing method is reduced. The method comprises the following steps: 1, preparing turbid liquid A; 2, preparing a NaOH aqueous solution; 3, preparing a solution B; 4, preparing a NaNO2 aqueous solution; 5, preparing turbid liquid C; 6, adding water for dilution, and vacuumizing; and 7, drying to obtain the water-soluble high-conductivity graphene. Compared with original graphene, the prepared water-soluble high-conductivity graphene has the advantages that the conductivity is not reduced and is maintained at the order of magnitude of 10 < 3 >, so that the dispersion of the graphene in water can be promoted under the condition of maintaining the conductivity of the graphene. According to the preparation method, the water-soluble high-conductivity graphene can be obtained.

Description

technical field [0001] The invention relates to a preparation method of high-conductivity graphene. Background technique [0002] Graphene is a sp 2 A new material in which hybridized carbon atoms are tightly packed into a single-layer two-dimensional honeycomb lattice structure. It has excellent optical, electrical, and mechanical properties, and has great potential in materials science, micro-nano processing, energy, biomedicine, and drug delivery. It has important application prospects and is considered to be a revolutionary material in the future. However, the application of graphene as a reinforcing material in a matrix is ​​still limited because graphene is difficult to disperse in the matrix. Cryogenic grinding has been proven to be an effective method for dispersing agglomerated carbon nanotubes. If cryogenic milling is applied to graphene for the shortest time, it is expected to produce pulverization sufficient to improve the graphene-graphite structure. However...

Claims

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Application Information

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IPC IPC(8): C01B32/194
CPCC01B32/194C01B2204/22
Inventor 李晓琳陈伟张亮龚涛
Owner SHENZHEN POLYTECHNIC