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Method for preparing suspension liquid of steady Nano carbon tube by using tannic acid

A carbon nanotube and tannic acid technology, applied in nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problems of easy pollution, high cost, toxicity, etc., and achieve the effect of strong suspension ability

Inactive Publication Date: 2007-10-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of surfactant required is relatively large, generally reaching a concentration of 1%, and the cost is relatively high. Some are toxic and prone to pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Adding tannic acid to distilled water is mixed with the aqueous solution that mass concentration is 5mg / L;

[0017] 2) adding carbon nanotubes (with an inner diameter of 60 to 100 nm) into the above-mentioned aqueous solution of tannic acid to prepare a mixed solution with a mass concentration of carbon nanotubes of 200 mg / L;

[0018] 3) Place the container containing the above mixed solution in an ultrasonic cleaner for 60 minutes;

[0019] 4) The ultrasonically treated mixed solution is left to stand for more than 24 hours, and then the suspension is transferred to another container to form a stable carbon nanotube suspension.

Embodiment 2

[0021] 1) Adding tannic acid to distilled water is mixed with the aqueous solution that mass concentration is 100mg / L;

[0022] 2) adding carbon nanotubes (inner diameter < 10nm) to the above-mentioned tannic acid aqueous solution to prepare a mixed solution with a carbon nanotube mass concentration of 200 mg / L;

[0023] 3) Place the container containing the above mixed solution in an ultrasonic cleaner for 30 minutes;

[0024] 4) The ultrasonically treated mixed solution is left to stand for more than 24 hours, and then the suspension is transferred to another container to form a stable carbon nanotube suspension.

Embodiment 3

[0026] 1) Adding tannic acid to distilled water is mixed with the aqueous solution that mass concentration is 100mg / L;

[0027] 2) adding carbon nanotubes (with an inner diameter of 60 to 100 nm) into the above-mentioned aqueous solution of tannic acid to prepare a mixed solution with a mass concentration of carbon nanotubes of 10 mg / L;

[0028] 3) Place the container containing the above mixed solution in an ultrasonic cleaner for 60 minutes;

[0029] 4) The ultrasonically treated mixed solution is left to stand for more than 24 hours, and then the suspension is transferred to another container to form a stable carbon nanotube suspension.

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PUM

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Abstract

This invention discloses a method for preparing stable carbon nanotube (CNT) suspension by using tannic acid. The method comprises: (1) affing distilled water into tannic acid to obtain 5-500 mg / L tannic acid aqueous solution; (2) adding CNT (inner diameters less than or equal to 100 nm) to obtain 10-1000 mg / L CNT solution; (3) ultrasonicating in an ultrasonic cleaner for 30-60 min; (4) standing for more than 24 h, transferring the CNT suspension into another container. The dispersant in this invention, tannic acid, is a nontoxic and water-soluble natural product, and has high suspension ability to CNT. The obtained CNT suspension is stable, and the method is suitable for a wide range of conditions.

Description

technical field [0001] The invention relates to a method for making stable carbon nanotube suspension by using tannic acid. Background technique [0002] The rapid development of nanotechnology will definitely have a wide-ranging impact on the global social economy. At present, the industrialization of nanomaterials is in the ascendant nationwide and even globally. Carbon nanotubes are a class of nanomaterials with unique physical and chemical properties, and their application in various fields has attracted widespread attention from scientists and entrepreneurs from all over the world. However, because the length of carbon nanotubes is relatively large relative to the diameter of the tubes, coupled with the van der Waals force, carbon tubes are easy to entangle and condense together, and it is difficult to form a uniform and stable suspension. This is a major problem that limits the wide application of carbon nanotubes. . [0003] At present, surfactants such as Triton X...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82B3/00
Inventor 林道辉
Owner ZHEJIANG UNIV
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