Carbon nano-tube enhanced cement-base composite material and preparation method thereof
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A technology of carbon nanotubes and reinforced cement, which is applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., to achieve good bonding effect, improved compressive strength, and improved flexural strength
Inactive Publication Date: 2011-03-23
HARBIN INST OF TECH
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[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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specific Embodiment approach 1
[0021] 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.
[0022] 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.
specific Embodiment approach 2
[0023] Embodiment 4: The difference between this embodiment and Embodiment 1 is that the dispersant is one of a cationic dispersant, anionic dispersant, and nonionic dispersant with an HLB greater than 10, or a nonionic dispersant Combination with one of cationic dispersant and anionic dispersant in any ratio; cationic dispersant is cetyltrimethylammonium bromide or cetyltrimethylammonium chloride of quaternary ammonium salt , the non-ionic dispersant is polyoxyethylene polyethylene glycol octyl phenyl ether (Triton X-100) or nonylphenol polyoxyethylene ether (OP) emulsifier or Arabic gum (AG) One or a combination of several, the anionic type is polyacrylic acid, poly(meth)acrylic acid ammonia or poly(meth)acrylic acid sodium. Others are the same as in the first embodiment.
[0024] In this embodiment, when the nonionic dispersant is a composition, various nonionic dispersants are mixed in any ratio. The optimal ratio of anionic to nonionic is 3:1 (by mass).
specific Embodiment approach 3
[0025] Embodiment 5: This embodiment is different from Embodiment 1 in that: the outer diameter of the carbon nanotubes ranges from 10 nm to 100 nm, and the length ranges from 1 μm to 100 μm. Others are the same as in the first embodiment.
[0026] The carbon nanotubes of this embodiment may also be treated with acid oxidation.
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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 la...
Claims
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