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Carbon nanotube cement composite material and preparation method thereof

A cement composite material and carbon nanotube technology, applied in the field of materials, can solve the problem of uneven distribution of carbon nanotubes, and achieve the effects of uniform distribution and improved performance

Inactive Publication Date: 2018-02-09
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a carbon nanotube cement composite material and a preparation method thereof for the uneven distribution of carbon nanotubes on the surface of the existing carbon nanotube cement composite material

Method used

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Examples

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preparation example Construction

[0020] Described a kind of preparation method of carbon nanotube cement composite material, the manufacturing process steps are as follows:

[0021] a. Prepare the above-mentioned raw materials according to a certain mass ratio;

[0022] b. Place the ordinary Portland cement in the cement mixer, add sand, water and water reducing agent to the ordinary Portland cement, and the mixing time lasts 3 minutes;

[0023] c. Disperse the carbon nanotubes and dispersant at a high speed with an ultrasonic mixer for 30 minutes;

[0024] d. Add the mixture of carbon nanotubes and dispersant into the cement mixer, and stir at a slow speed for 2 minutes;

[0025] e. Finally, add a defoamer to the cement mixer, and stir rapidly for 3 minutes to complete the preparation.

[0026] The defoamer is an organosiloxane.

Embodiment 1

[0028] A carbon nanotube cement composite material, comprising the following raw materials and weight fractions: 100 parts by mass of ordinary Portland cement, 150 parts by mass of sand, 45 parts by mass of water, 8 parts by mass of gypsum, 30 parts by mass of secondary fly ash, 0.4 parts by mass of foaming agent, 30 parts by mass of water reducing agent, 10 parts by mass of dispersant, 10 parts by mass of carbon nanotubes, 20 parts by mass of liquid epoxy resin, 7 parts by mass of concentrated sulfuric acid and 10 parts by mass of concentrated nitric acid.

[0029] The production process steps are as follows:

[0030] a. Prepare the above-mentioned raw materials according to a certain mass ratio;

[0031] b. Place the ordinary Portland cement in the cement mixer, add sand, water and water reducing agent to the ordinary Portland cement, and the mixing time lasts 3 minutes;

[0032] c. Disperse the carbon nanotubes and dispersant at a high speed with an ultrasonic mixer for 30...

Embodiment 2

[0037] A carbon nanotube cement composite material, comprising the following raw materials and weight fractions: 100 parts by mass of ordinary Portland cement, 150 parts by mass of sand, 45 parts by mass of water, 8 parts by mass of gypsum, 30 parts by mass of secondary fly ash, 0.4 parts by mass of foaming agent, 30 parts by mass of water reducing agent, 10 parts by mass of dispersant, 10 parts by mass of carbon nanotubes, 20 parts by mass of liquid epoxy resin, 7 parts by mass of concentrated sulfuric acid and 10 parts by mass of concentrated nitric acid.

[0038] The production process steps are as follows:

[0039] a. Prepare the above-mentioned raw materials according to a certain mass ratio;

[0040] b. The carbon nanotubes are firstly mixed with the secondary fly ash;

[0041] c. Put the mixture of carbon nanotubes and secondary fly ash into the high-speed ball mill, and the grinding time lasts for 20 minutes;

[0042] d. Put ordinary Portland cement, sand and water i...

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Abstract

The invention discloses a carbon nanotube cement composite material which is characterized by comprising the following raw materials in parts by weight: 90-100 parts by mass of ordinary Portland cement, 135-150 parts by mass of sand, 40-45 parts by mass of water, 4-8 parts by mass of gypsum, 27-30 parts by mass of secondary fly ash, 0.1-0.4 part by mass of defoaming agent, 27-30 parts by mass of water reducing agent, 10-15 parts by mass of dispersant, 9-10 parts by mass of carbon nanotube, 10-20 parts by mass of liquid epoxy resin, 3-7 parts by mass of concentrated sulfuric acid and 5-10 partsby mass of concentrated nitric acid. The concentrated sulfuric acid and concentrated nitric acid are utilized to perform carboxylation modification on the carbon nanotubes, so that the carbon nanotubes are relatively uniformly distributed on the surface of the composite material; and a mixing-grinding technique is utilized, so that the carbon nanotubes are distributed more uniformly, thereby enhancing the properties of the composite material. By using the mixing-grinding technique and chemical modification, a powerful chemical interaction energy is generated on the inert particle surface; andthe generation of the chemical interaction energy is a relatively slow process of which the occurrence can be adjusted and controlled.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a carbon nanotube cement composite material and a preparation method thereof. Background technique [0002] Carbon nanotubes, also known as bucky tubes, are one-dimensional quantum materials with a special structure. The radial dimensions are nanometers, the axial dimensions are micrometers, and both ends of the tube are basically sealed. Carbon nanotubes, as one-dimensional nanomaterials, are light in weight, have perfectly connected hexagonal structures, and possess many unusual mechanical, electrical and chemical properties. In recent years, with the in-depth research of carbon nanotubes and nanomaterials, their broad application prospects have also been continuously shown. [0003] Cement, powdery hydraulic inorganic cementitious material, can be hardened in air or better hardened in water after adding water and stirring, and can firmly bond sand, stone and other materials...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B20/02
CPCC04B20/023C04B20/026C04B28/04C04B14/06C04B22/002C04B2103/302C04B14/026C04B2103/408C04B2103/50C04B22/143C04B24/281C04B18/08
Inventor 陈金平张雪松俞然刚陈海阳
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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