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Carbon nano-tube enhanced cement-base composite material and preparation method thereof

A carbon nanotube and cement-enhancing technology, which is applied in solid waste management, sustainable waste treatment, climate sustainability, etc. The effect of increasing the flexural strength

Inactive Publication Date: 2008-08-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that carbon nanotubes are difficult to uniformly disperse in cement matrix; Preparation

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  • Carbon nano-tube enhanced cement-base composite material and preparation method thereof

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specific Embodiment approach 1

[0016] Embodiment 1: The carbon nanotube reinforced cement-based composite material of this embodiment is made of dispersant, carbon nanotube, thickening stabilizer, cement admixture, superplasticizer, defoamer and cement, wherein The mass ratio of carbon nanotubes to dispersant is 1:0.1~10, the mass ratio of carbon nanotubes to cement admixture is 1:2~200, and the mass ratio of carbon nanotubes to superplasticizer is 1:0.1~ 20. The mass ratio of carbon nanotubes to thickening stabilizer is 1:0.1~20, the mass ratio of carbon nanotubes to defoamer is 1:0.05~5, and the mass ratio of carbon nanotubes to cement is 1:20~ 2000.

[0017] The thickening stabilizer described in this embodiment is cellulose, polyethylene glycol octyl phenyl ether (Triton X-100), nonylphenol polyoxyethylene (OP) emulsifier, Arabic gum (AG), poly One or more combinations of vinyl alcohol and polyvinylpyrrolidone; wherein the cellulose is methyl cellulose, carboxymethyl cellulose or carboxyethyl cellulose...

specific Embodiment approach 2

[0018] Embodiment 2: This embodiment differs from Embodiment 1 in that carbon fibers are added to the raw materials of carbon nanotube-reinforced cement-based composite materials, and the mass ratio of carbon nanotubes to carbon fibers is 1:0.5-10. Others are the same as in the first embodiment.

[0019] The carbon fibers in this embodiment are chopped polyacrylonitrile (PAN) carbon fibers with a nominal diameter of 7 μm and a length of 1-6 mm.

specific Embodiment approach 3

[0020] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the thickening stabilizer is cellulose and polyethylene glycol octylphenyl ether (Triton X-100) nonylphenol polyoxyethylene (OP) One or a combination of emulsifiers, gum arabic (AG), polyvinyl alcohol, and polyvinylpyrrolidone; wherein the cellulose accounts for 0.4-2.0% of the total mass of the thickening and stabilizing agent. Others are the same as in the second embodiment.

[0021] When polyethylene glycol octylphenyl ether (Triton X-100), nonylphenol polyoxyethylene (OP) emulsifier, gum arabic (AG), polyvinyl alcohol, and polyvinylpyrrolidone in this embodiment are combined , they can be mixed in any ratio. The cellulose is methyl cellulose, carboxymethyl cellulose or carboxyethyl cellulose.

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Abstract

The present invention provides a carbon nano-tube reinforcing cement-based composite material and the preparing method thereof, which relates to an inorganic non-metal fiber-reinforced cement-based composite material and the preparing method thereof. The invention settles the problem that the carbon nano-tube is hard to uniformly dispersed in the cement substrate, and the carbon nano-tube reinforcing cement-based composite material of the invention is mainly composed of carbon nano-tube, dispersing agent, thickening stabilizing agent, cement blending material, superplasticiser, antifoaming agent and cement; the method of the invention comprises the following steps: slowly injecting the continuous phase mixed liquid of the thickening stabilizing agent into the carbon nano-tube disperse phase mixed liquid; adding the cement mixing material, mixing to uniform, heating and ultrasonic agitating, then vacuum discharging the bubble; then adding into the mixed liquid of the superplasticiser and the water for mixing to uniform, further eliminating the bubble with the antifoam agent; at last adding cement for mixing to uniform, adding the slurry into the oil mould and jolt ramming for molding; mode removing and standard maintaining to the prescribed lifetime. The carbon nano-tube in the product prepared by the method of the invention is uniformly dispersed in the cement substrate. The mechanical property and conductivity of the product is increased for several times.

Description

technical field [0001] The invention relates to an inorganic non-metallic fiber reinforced cement-based composite material and a preparation method thereof. Background technique [0002] Carbon nanotubes (CNTs) have attracted extensive attention in the fields of science and industry since their discovery because of their unique structure and excellent mechanical, electromagnetic, and thermal properties. Carbon nanotubes have been used to reinforce various matrix materials with many important results. As the ultimate fiber material, carbon nanotubes can be well compounded with cement to complement or strengthen the advantages of component materials, which can not only greatly improve the mechanical properties of cement-based such as strength, elasticity, toughness, etc. The cross-coupling can enable composite materials to have many new functions, such as antistatic, microwave absorption or electromagnetic shielding. However, due to the small size, large aspect ratio and lar...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B22/02
CPCC04B14/026C04B14/386C04B28/02Y02W30/91C04B18/08C04B18/141C04B18/146C04B20/008C04B24/005C04B24/26C04B24/2641C04B40/0028C04B40/0082C04B40/0227C04B40/0281C04B2103/32C04B2103/44C04B2103/50C04B24/003C04B24/223C04B24/226C04B24/2623C04B24/32C04B24/383C04B24/42C04B24/2652
Inventor 段忠东罗健林
Owner HARBIN INST OF TECH
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