Preparation method of flexible self-supported paper graphene membrane and composite membrane thereof

A graphene membrane, self-supporting technology, applied in the direction of graphene, chemical instruments and methods, carbon compounds, etc., can solve the problems of cumbersome operation, easily damaged membrane structure, unfavorable large-area controllable material preparation, etc., to achieve easy operation, The effect of the simple preparation process

Inactive Publication Date: 2013-08-28
SHANXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The transfer of the assembly is required in the process of preparing graphene-based membranes, which is not only cumbersome to oper

Method used

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  • Preparation method of flexible self-supported paper graphene membrane and composite membrane thereof
  • Preparation method of flexible self-supported paper graphene membrane and composite membrane thereof
  • Preparation method of flexible self-supported paper graphene membrane and composite membrane thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1. According to the improved Hummers method, graphite was used as raw material to prepare a graphene oxide aqueous solution with a concentration of 7.2 mg / mL. Inject 0.6mL7.2mg / mL graphene oxide aqueous solution into the bottom of 5mL0.4mg / mL hydroxylamine ethanol solution (bottom area is 4.5cm 2 ). After standing for 2 hours, as the distilled water in the graphene oxide layer and the ethanol in the hydroxylamine ethanol solution diffused each other, the hydroxylamine slowly diffused into the graphene oxide layer, and the graphene oxide self-assembled under the induction of hydroxylamine, and solidified to form a yellow-brown oxide layer. Graphene gel such as figure 1 shown. Then slowly increase the temperature to 100°C, keep the temperature, evaporate the solvent, the ethanol solution gradually volatilizes, hydroxylamine reduces the graphene oxide, and at the same time, N elements are doped into the graphene film to prepare a black-gray N-doped self-supportin...

Embodiment 2

[0031] Example 2. According to the improved Hummers method, graphite was used as raw material to prepare a graphene oxide aqueous solution with a concentration of 9.5 mg / mL. Inject 9.5 mL of 7.2 mg / mL GO solution into the bottom of 35 mL of 0.9 mg / mL hydroxylamine ethanol solution (bottom area is 65 cm 2). After standing for 10 hours, as the distilled water in the graphene oxide layer and the ethanol in the hydroxylamine ethanol solution diffused each other, the hydroxylamine slowly diffused into the graphene oxide layer, and the graphene oxide self-assembled under the induction of hydroxylamine, and solidified to form a yellow-brown oxide layer. Graphene gel. Then slowly increase the temperature to 100°C, keep the temperature, evaporate the solvent, the ethanol solution gradually volatilizes, hydroxylamine reduces the graphene oxide, and at the same time, N elements are doped into the graphene film to prepare a black-gray N-doped self-supporting film. The paper-like graphen...

Embodiment 3

[0032] Example 3. According to the improved Hummers method, graphite was used as raw material to prepare a graphene oxide aqueous solution with a concentration of 5 mg / mL. Inject 60 mL of 5 mg / mL GO solution into the bottom of 300 mL of 0.5 mg / mL hydroxylamine ethanol solution (bottom area is 400 cm 2 ). After standing for 6 hours, as the distilled water in the graphene oxide layer and the ethanol in the hydroxylamine ethanol solution diffused each other, the hydroxylamine slowly diffused into the graphene oxide layer, and the graphene oxide self-assembled under the induction of hydroxylamine, and solidified to form a yellow-brown oxide layer. Graphene gel. Then slowly raise the temperature to 90°C, keep the temperature, evaporate the solvent, the ethanol solution gradually volatilizes, hydroxylamine reduces the graphene oxide, and at the same time, N elements are doped into the graphene film to prepare a black-gray N-doped self-supporting film. The paper-like graphene membr...

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Abstract

The invention discloses a preparation method of a flexible self-supported paper graphene membrane and a composite membrane thereof. The preparation method comprises the following steps of: preparing a graphene oxide aqueous solution with concentration of 1.5mg/mL-12mg/mL by using graphite as the material according to an improved Hummers method; pouring the graphene oxide aqueous solution and functionalized carbon nano tube mixed aqueous solution to the bottom of 0.2mg/mL-11mg/mL of hydroxylamine alcohol solution or a hydroxylamine hydrochloride hydroxylamine alcohol solution, stewing and condensing; heating up at a low temperature, and evaporating alcohol solvent to obtain N-doped flexible self-supported paper graphene membrane and the composite membrane thereof. The product prepared by the preparation method disclosed by the invention is controllable in thickness, good in flexibility, high in electrical conductivity and thermal conductivity, and can be used for a capacitor electrode material, a mechanical driver and a heat conducting material. The preparation method is simple to operate, capable of completing the whole preparation process by one step and capable of realizing mass production of the N-doped flexible self-supported paper graphene membrane and the composite membrane thereof.

Description

technical field [0001] The invention relates to the preparation of membrane materials, in particular to a preparation method of an N-doped flexible self-supporting paper-like graphene membrane and a composite membrane thereof. Background technique [0002] Since graphene was discovered in 2004 [Science, 2004, 306, 5696, 666-669], it has attracted widespread attention and great interest of scientists for its peculiar properties. Single-layer graphene exists in a two-dimensional crystal structure with a thickness of only 0.334nm. It is the basic unit for constructing other dimensional carbonaceous materials (0-dimensional fullerene, one-dimensional carbon nanotubes, and three-dimensional graphite). thin material. Graphene has a large specific surface area (2630m 2 / g), excellent mechanical strength (tensile strength and Young's modulus are 130GPa and ~1TPa, respectively), good thermal conductivity (~5000W / (m K)) and electrical properties (carrier mobility (2 ×10 5 cm 2 / (...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B31/02B82Y40/00B82Y30/00C01B32/168C01B32/184
Inventor 韩高义常云珍
Owner SHANXI UNIV
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