Large-area nano carbon material and preparation method thereof

A nano-carbon material, nano-carbon technology, applied in nano-carbon, textile and papermaking, fiber chemical characteristics, etc., can solve the problems of inability to large-scale continuous production, complex process, and high equipment requirements

Inactive Publication Date: 2021-04-20
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, the preparation of ultra-long carbon nanotubes and large-area graphene films generally adopts CVD method, arc discharge method, template method, and spraying method. The preparation process has large energy consumption (high temperature, inert gas, etc.), complicated process, and uniformity. Poor performance, high equipment requirements, most of them cannot be scaled and continuous production, and poor scalability

Method used

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  • Large-area nano carbon material and preparation method thereof
  • Large-area nano carbon material and preparation method thereof
  • Large-area nano carbon material and preparation method thereof

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preparation example Construction

[0025] The invention provides a method for preparing a large-area nano-carbon material, comprising the following steps;

[0026] Provide carboxylated water-soluble nano-carbons, said nano-carbons comprising carbon nanotubes and graphene oxide;

[0027] Disperse the carboxylated water-soluble nano-carbon in water, and then adjust the pH value of the resulting dispersion to obtain a nano-carbon dispersion;

[0028] The metal substrate is immersed in the nano-carbon dispersion liquid to carry out the self-assembly growth of the nano-carbon to obtain the large-area nano-carbon material; the metal substrate is metal wire, metal foil, metal mesh or foamed metal.

[0029] The invention provides carboxylated water-soluble nano-carbons, which include carbon nanotubes and graphene oxide. The present invention has no special limitation on the specific method of providing carboxylated water-soluble nano-carbons, and the method well known to those skilled in the art can be adopted. In spe...

Embodiment 1

[0048] Preparation of Nanocarbon Dispersion

[0049] (1) Carbon nanotube dispersion

[0050] Weigh 0.30g of CNT and lay it flat on the bottom of the polytetrafluoroethylene autoclave, use a pipette to measure 0.90 mL of concentrated nitric acid (68% mass concentration) into a 5mL glass bottle, and put the glass bottle into the high pressure React in an oven at 180° C. for 4 hours in a reaction kettle to form water-soluble carbon nanotubes that can be stably dispersed in water.

[0051] The acid-treated carbon nanotubes were washed with a large amount of deionized water several times to remove impurities, and filtered under reduced pressure until the color of the filtrate changed from light yellow to colorless and transparent. Then disperse in 300mL of deionized water and ultrasonicate for more than 30min to obtain a stable and uniformly dispersed CNT dispersion. Based on the initial CNT mass, the concentration of the dispersion is 1.0 g / L. The pH value of the dispersion was...

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Abstract

The invention provides a large-area nano carbon material and a preparation method thereof, and belongs to the technical field of nano carbon materials. According to the invention, the oxidation-reduction potential difference between a nanocarbon dispersion liquid and metal is used as driving force, the metal is used as a substrate, in-situ self-assembly growth is carried out under simple and mild conditions (room temperature or low temperature of 20-100 DEG C, and high temperature is not needed), the large-area nanocarbon material supported and loaded by the metal is obtained, raw material consumption is low, operation is simple and easy, and expansibility is high. The nano carbon material is not limited by instruments (a drying oven, a heating plate and the like), can be directly made into multiple forms such as a tubular form, a sheet form and a foam form, is used in the fields of energy chemistry and environmental chemistry, and can etch a metal substrate as required to prepare a regular and uniform multi-form large-area nano carbon material without metal support for application.

Description

technical field [0001] The invention relates to the technical field of nano-carbon materials, in particular to a large-area nano-carbon material and a preparation method thereof. Background technique [0002] Carbon nanotubes (CNTs) can be regarded as curled graphene sheets. According to the number of layers of graphene sheets, they can be divided into single-wall carbon nanotubes and multi-wall carbon nanotubes. They have large specific surface area, good electrical conductivity and thermal conductivity. , has unique mechanical, electrical, optical properties, and good performance at the nanoscale, so it is widely used in molecular sieves, drug delivery, particle exchange, seawater desalination, and sewage treatment. At present, the main methods involved in carbon nanotube film formation are spin coating method, electrophoresis method, vacuum filtration method, spray coating method, chemical vapor deposition method, LB (Langmuir-Blodgett) film method, and electrostatic laye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15D01F9/12
Inventor 曹雪波谷俐武圆圆
Owner JIAXING UNIV
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