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A kind of preparation method of carbon nanotube film

A carbon nanotube film, carbon nanotube technology, applied in the direction of carbon nanotube, nanocarbon, nanotechnology, etc., can solve the problems of residue, weak bonding force between nanotubes, low film formation efficiency and so on

Active Publication Date: 2017-12-08
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbon nanotube film prepared by this method contains a certain amount of surfactant, which is easy to cause residue in the removal process; at the same time, the binding force between the nanotubes is not strong, and the film-forming efficiency is low (Liangbing Hu, et.al., Carbon Nanotube Thin Films: Fabrication, Properties, and Applications, Chem. Rev. 2010, 110, 5790–5844. JeaWoongJo, Jae Woong Jung, JeaUk Lee, and Won Ho Jo, Fabrication of Highly Conductive and Transparent Thin Films from Single-Walled Carbon Nanotubes Using a NewNon-ionic Surfactant via Spin Coating, ACS NANO VOL.4, NO.9 5382-5388.)
Reduced pressure filtration method: The size of the membrane prepared by this method is limited by the Buchner funnel and other containers, and the carbon tubes are tightly bound by the negative pressure of the atmosphere, the porosity is low, and the energy storage is limited.

Method used

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  • A kind of preparation method of carbon nanotube film
  • A kind of preparation method of carbon nanotube film
  • A kind of preparation method of carbon nanotube film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 0.10g of the original CNT and place it in a polytetrafluoroethylene liner, use a syringe to measure 0.30mL of concentrated nitric acid (mass concentration 66-68%) and place it in a 5mL glass vial, place the glass vial in a polytetrafluoroethylene In the inner lining, add a high-pressure steel sleeve and react at 180°C for 4 hours, so as to avoid the direct contact of liquid nitric acid with CNT, and provide nitric acid vapor in a high temperature environment.

[0037] The carbon nanotubes treated with nitric acid are cleaned by vacuum filtration to remove impurities such as nitric acid, nitrate, and amorphous carbon particles produced by oxidation. Rinse with a large amount of water several times, and the color of the filtrate is washed from yellow to colorless and transparent to ensure that impurities are removed. The functionalized CNTs that have been filtered on the filter paper are rinsed vigorously with a washing bottle and transferred to a 250mL blue cap rea...

Embodiment 2

[0040] Weigh 0.10 g of original CNTs and put them into a polytetrafluoroethylene lining filled with concentrated nitric acid (mass concentration: 66-68%), soak and react at room temperature for 12 hours.

[0041] The carbon nanotubes treated with nitric acid are cleaned by vacuum filtration to remove impurities such as nitric acid, nitrate, and amorphous carbon particles produced by oxidation. Rinse with a large amount of water several times, and the color of the filtrate is washed from yellow to colorless and transparent to ensure that impurities are removed. The functionalized CNTs that have been filtered on the filter paper are rinsed vigorously with a washing bottle and transferred to a 250mL blue cap reagent bottle. The functionalized CNT (marked as p-CNT) colloidal solution was placed in a 100W ultrasonic machine for 1 h to disperse p-CNT uniformly and form a stable colloidal solution. The colloidal solution can exist stably for a long time.

[0042] Adjust the pH of t...

Embodiment 3

[0044] 0.10 g of original CNTs were weighed and put into a polytetrafluoroethylene liner filled with concentrated sulfuric acid (mass concentration: 80%), and soaked and reacted at room temperature for 12 hours.

[0045] Clean the carbon nanotubes treated with nitric acid by vacuum filtration to remove impurities. Rinse with a large amount of water several times, and the color of the filtrate is washed from yellow to colorless and transparent to ensure that impurities are removed. The functionalized CNTs that have been filtered on the filter paper are rinsed vigorously with a washing bottle and transferred to a 250mL blue cap reagent bottle. The functionalized CNT (marked as p-CNT) colloidal solution was placed in a 100W ultrasonic machine for 1 h to disperse p-CNT uniformly and form a stable colloidal solution. The colloidal solution can exist stably for a long time.

[0046] Adjust the pH of the p-CNT colloidal solution to 4 with hydrochloric acid, let it stand overnight, ...

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Abstract

The invention discloses a preparation method of a carbon nano tube film. The preparation method comprises the following steps that 1, inorganic acid with oxidability is used for oxidizing a carbon nano tube to be a functional carbon nano tube with a hydrophilic functional group; 2, the functional carbon nano tube is dispersed in water, pH is adjusted to be 3.5-7, and a carbon nano tube soaking solution is obtained; 3, metal foil is placed in the carbon nano tube soaking solution for growth of a carbon nano tube film; 4, the carbon nano tube film which finishes growth is separated from the metal foil; 5, cleaning and drying are carried out, and the carbon nano tube film finished product is obtained, wherein the metal foil is prepared from one or any combination of metal with the activity between magnesium and copper. By means of oxidation-reduction potential difference between the oxidized carbon nano tube and the metal, deposition and assembly of the carbon nano tube on the surface of the metal are achieved, and the carbon nano tube is continuously deposited on the surface of the metal foil till the continuous and compact carbon nano tube film is formed.

Description

technical field [0001] The invention relates to the field of preparation of new materials, in particular to a method for preparing a carbon nanotube film. Background technique [0002] Carbon nanotubes (CNTs) have the advantages of large specific surface area, good electrical and thermal conductivity, high thermal and mechanical stability, and are ideal raw materials for designing and assembling functional films. Carbon nanotube film, in addition to continuing the unique physical and chemical properties of a single carbon nanotube, also avoids the potential threat of nano-fine particles to the environment and the human body. The assembled macroscopic two-dimensional film is more conducive to the application of materials in the electronics industry. Such as the preparation of soft elastic electrodes, liquid crystal displays, diodes, especially in electrochemical energy conversion and energy storage have greater development prospects (Ying Zhou, SatoruShimada, Takeshi Saito, R...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/16B82Y30/00B82Y40/00
CPCC01B2202/22C01B2202/30C01P2002/72C01P2002/85C01P2004/03
Inventor 曹雪波宋利谷俐李雷
Owner JIAXING UNIV