CN101274831B - Carbon nano-tube fiber cement-based material and preparation thereof - Google Patents
Carbon nano-tube fiber cement-based material and preparation thereof Download PDFInfo
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- CN101274831B CN101274831B CN2008100645222A CN200810064522A CN101274831B CN 101274831 B CN101274831 B CN 101274831B CN 2008100645222 A CN2008100645222 A CN 2008100645222A CN 200810064522 A CN200810064522 A CN 200810064522A CN 101274831 B CN101274831 B CN 101274831B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention relates to a cement-based material of carbon nano tube fiber and a preparation method thereof, in particular to a toughened cement-based material and a preparation method thereof. The invention solves the problems of relatively low anti-bending and anti-breaking intensity and toughness of the existing fiber toughened cement-based material. The material is produced by a fiber dispersant, an organic solvent, carbon fibers, carbon nano tubes, deionized water, a super plasticizer, a polymer emulsion, mineral admixture and cement. The preparation method of the invention is as follows: the fiber dispersant is added into mixed slurry of the cement and stirred; the primarily mixed slurry is fed into a high shearing colloid mill for shearing at high speed for 5 to 30min; the evenly stirred slurry is poured into a test mould which is moved to a vacuum drying case for pressure reducing and bubble-removing and heated for evaporation of the solvent for 0.5 to 3 hours; after 24 hours, and the material is obtained after tearing the mould and maintained in water at room temperature. The fracture energy GF and the fracture toughness of the material obtained by using the method of the invention respectively are 106.3N question mark m and 0.998Mpa/m<-1/2>, which are respectively 112.6 percent and 33.1 percent higher than the fracture energy and the fracture toughness of the existing fiber toughened cement-based material.
Description
Technical field
The present invention relates to a kind of toughness reinforcing cement-based material and preparation method thereof.
Background technology
Modern society's high speed development, the brittle failure property of cement material, low toughness can not satisfy such as the requirement of special occasions such as complex stress effect such as earthquake, disaster caused by a windstorm, dam body internal temperature stress to material property.Many scholars attempt in its matrix, introducing some HS, high-modulus fiber or micro mist, like steel fiber, polymer fiber, thomel, micro-nano silicon-dioxide etc., to strengthen its corresponding bending resistance, anti-fracture toughness property.But toughening effect is still not too remarkable, and the energy-to-break of the carbon-fiber cement based composites of corresponding preparation is less than 50Nm, and fracture toughness is also less than 0.75MPa/m
-1/2
Summary of the invention
The object of the invention has solved existing fiber reinforced cement-based material bending resistance, anti-breaking tenacity is on the low side, and the problem that toughness is not high provides a kind of carbon nano-tube fiber cement-based material and preparation method thereof.
Carbon nano-tube fiber cement-based material of the present invention is processed by dispersing agent for fibre, organic solvent, thomel, carbon nanotube, deionized water, superplasticizer, polymer emulsion, mineral admixture and cement; Wherein the mass ratio of carbon nanotube and dispersing agent for fibre is 1: 0.5～15; The mass ratio of thomel and dispersing agent for fibre is 1: 0.1～10; The mass ratio of carbon nanotube and thomel is 1: 0.5～15; The mass ratio of deionized water and cement is 0.30～0.80: 1; The mass ratio of superplasticizer and cement is 0.005～0.015: 1, and the mass ratio of polymer emulsion and cement is 0.05～0.20: 1, and the mass ratio of mineral admixture and cement is 0.05～0.15: 1.
Dispersing agent for fibre in the carbon nano-tube fiber cement-based material of the present invention is a kind of in cationic dispersing agent, anionic dispersing agent, the non-ionic dispersing agent, or a kind of combination in non-ionic dispersing agent and cationic dispersing agent, the anionic dispersing agent; Cationic dispersing agent is a cetyl trimethylammonium bromide; Non-ionic dispersing agent is one or more the combination in methylcellulose gum, NATROSOL 250, polyoxyethylene nonylphenol, the gum arabic, and anionic is one or more the combination in X 2073, the ZX-I; Organic solvent is absolute ethyl alcohol, acetone, THF (THF), N (DMF), chloroform, ETHYLE ACETATE or perhydronaphthalene.Carbon nanotube is that average caliber is that 1nm～200nm, length are the carbon nanotube of 0.1 μ m～20 μ m; Thomel is that nominal diameter is 2～7 μ m, and length is that the weak point of 1～6mm is cut PAN-based carbon fiber; Superplasticizer is one or more the mixing in β-naphthalene sulfonic salt formaldehyde condensation products series high-efficiency water-reducing agent, sulfonated melamine compound resin series high-efficiency water-reducing agent, the carboxylic acid polyetherester block copolymer series high-efficiency water-reducing agent.Polymer emulsion is a kind of in carboxyl styrene-butadiene emulsion, polyvinyl acetate emulsion, the interpolymer latex of polystyrene and acrylic ester; Mineral admixture is one or more the mixing in silicon ash, flyash, zeolite powder, the silica powder.
The preparation method of carbon nano-tube fiber cement-based material of the present invention is following: one, dispersing agent for fibre is dissolved in that to be mixed with mass concentration in the organic solvent be 0.1%～10% solution; Then carbon nanotube is joined in the solution; Magnetic agitation 10～60min, ultra-sonic dispersion 10～60min; Thomel is added in the solution after the supersound process, ultra-sonic dispersion 10～60min obtains fiber dispersion then again; Two,, obtain the cement mixing slurry with deionized water, superplasticizer, polymer emulsion, mineral admixture and cement mixing and stirring; Three, the fiber dispersion that step 1 is obtained adds in the cement mixing slurry and stirs 3～5min, the preliminary mixed slurry of fibrocement; Four, preliminary mixed slurry feeding high-shear colloid mill high speed is sheared 5～30min, again with the slurry that the stirs jolt ramming, floating in the die trial of packing into; Five, cover one deck 10～30 purpose copper mesh topmost in die trial; Move in the vacuum drying oven vacuum tightness for-0.01MPa～-0.08MPa, Heating temperature are vacuum defoaming under 30～80 ℃ the condition; Heated volatile solvent 0.5～3h; Form removal behind the 24h is put into relative humidity and is maintenance 28d in 100% the room temperature water again, promptly gets carbon nano-tube fiber cement-based material; Wherein the mass ratio of carbon nanotube and dispersing agent for fibre is 1: 0.5～15 in the step 1, and the mass ratio of thomel and dispersing agent for fibre is 1: 0.1～10, and the mass ratio of carbon nanotube and thomel is 1: 0.5～15; The mass ratio of deionized water and cement is 0.30～0.80: 1 in the step 2; The mass ratio of superplasticizer and cement is 0.005～0.015: 1; The mass ratio of polymer emulsion and cement is 0.05～0.20: 1; The mass ratio of mineral admixture and cement is 0.05～0.15: 1, and the mass ratio of cement is 1: 20～200 in the carbon nanotube in the step 3 in the fiber dispersion and the total mass of thomel and the cement mixing slurry.
Dispersing agent for fibre is a kind of in cationic dispersing agent, anionic dispersing agent, the non-ionic dispersing agent in the inventive method step 1, or a kind of combination in non-ionic dispersing agent and cationic dispersing agent, the anionic dispersing agent; Cationic dispersing agent is a cetyl trimethylammonium bromide; Non-ionic dispersing agent is one or more the combination in methylcellulose gum, NATROSOL 250, polyoxyethylene nonylphenol, the gum arabic, and anionic is one or more the combination in X 2073, the ZX-I.Organic solvent in the step 1 is absolute ethyl alcohol, acetone, THF (THF), N (DMF), chloroform, ETHYLE ACETATE or perhydronaphthalene.Carbon nanotube in the step 1 is that average caliber is that 1nm～200nm, length are the carbon nanotube of 0.1 μ m～20 μ m; Thomel is that nominal diameter is that 2～7 μ m, length are that the weak point of 1～6mm is cut PAN-based carbon fiber.Superplasticizer in the step 2 is that β-naphthalene sulfonic salt formaldehyde condensation products series high-efficiency water-reducing agent, sulfonated melamine compound resin series high-efficiency water-reducing agent, carboxylic acid polyetherester block copolymer are that polymer emulsion in the diminishing step 2 is a kind of in carboxyl styrene-butadiene emulsion, polyvinyl acetate emulsion, the interpolymer latex of polystyrene and acrylic ester; Mineral admixture is one or more mixing in silicon ash, flyash, zeolite powder, the silica powder.
Thomel (CF) among the present invention in the used carbon fibre, its tensile strength is high, modulus is high, and heat, electrical coductivity are good; Carbon nanotube (CNT) then is hollow, the tubular fiber of high-strength light up to now, and its mechanical property is high, and tensile strength reaches 50～200GPa, high 100 times than steel, and density has only 1/6 of steel; Its toughness is also high, and theoretical unit elongation can reach 20, and recoverable strain can reach more than 5%, and its electricity, thermal property are also very excellent.When these two kinds of carbon fibres are added in the cement matrix with suitable ratio, appropriate means, carbon nanotube, thomel can be brought into play its unique advantage well in hardened cement, improve the effectiveness of cement matrix mechanical property and non-deformability.
The toughness reinforcing cement-based material of gained carbon nano-tube fibre among the present invention adopts three-point bending method to test corresponding fracture toughness property.The SEM that carries out to respective beam test specimen rupture failure face scans; Can find out that from corresponding shape appearance figure 1 carbon nanotube, thomel that mechanical property is excellent overlap stack each other, have formed netted pilotaxitic texture; Not only can improve the mechanical strength of cement matrix; And, stop and delay fissured generation, extension, thereby can make the cement matrix of hard brittle material present very high splitting resistance, ductility and toughness because fiber and cement matrix acting in conjunction can brought into play good extract and bridging overlaps effect.Adopt the inventive method to obtain the energy-to-break G of material
FAnd fracture toughness K
CIBe respectively 106.3Nm, 0.998MPa/m
-1/2, energy-to-break exceeds 112.6% than the energy-to-break of existing fiber reinforced cement matrix material, and fracture toughness exceeds 33.1% than the fracture toughness of existing fiber reinforced cement matrix material.
Description of drawings
Fig. 1 is the SEM scintigram of the toughness reinforcing cement-based material rupture failure of gained carbon nano-tube fibre face in the embodiment 19.
Embodiment
Embodiment one: carbon nano-tube fiber cement-based material is processed by dispersing agent for fibre, organic solvent, thomel, carbon nanotube, deionized water, superplasticizer, polymer emulsion, mineral admixture and cement in this embodiment; Wherein the mass ratio of carbon nanotube and dispersing agent for fibre is 1: 0.5～15; The mass ratio of thomel and dispersing agent for fibre is 1: 0.1～10; The mass ratio of carbon nanotube and thomel is 1: 0.5～15; The mass ratio of deionized water and cement is 0.30～0.80: 1; The mass ratio of superplasticizer and cement is 0.005～0.015: 1, and the mass ratio of polymer emulsion and cement is 0.05～0.20: 1, and the mass ratio of mineral admixture and cement is 0.05～0.15: 1.
Embodiment two: this embodiment and embodiment one are different is that dispersing agent for fibre is a kind of in cationic dispersing agent, anionic dispersing agent, the non-ionic dispersing agent, or a kind of combination in non-ionic dispersing agent and cationic dispersing agent, the anionic dispersing agent; Cationic dispersing agent is a cetyl trimethylammonium bromide; Non-ionic dispersing agent is one or more the combination in methylcellulose gum, NATROSOL 250, polyoxyethylene nonylphenol, the gum arabic, and anionic is one or more the combination in X 2073, the ZX-I; Organic solvent is absolute ethyl alcohol, acetone, THF (THF), N (DMF), chloroform, ETHYLE ACETATE or perhydronaphthalene.Other is identical with embodiment one.
Embodiment three: what this embodiment and embodiment one were different is that carbon nanotube is that average caliber is that 1nm～200nm, length are the carbon nanotube of 0.1 μ m～20 μ m.Other is identical with embodiment one.
Embodiment four: what this embodiment and embodiment one were different is that thomel is that nominal diameter is 2～7 μ m, and length is that the weak point of 1～6mm is cut PAN-based carbon fiber.Other is identical with embodiment one.
Embodiment five: this embodiment and embodiment one are different is that superplasticizer is one or more the mixing in β-naphthalene sulfonic salt formaldehyde condensation products series high-efficiency water-reducing agent, sulfonated melamine compound resin series high-efficiency water-reducing agent, the carboxylic acid polyetherester block copolymer series high-efficiency water-reducing agent.Other is identical with embodiment one.
When superplasticizer is mixture, press between the various mixtures in this embodiment arbitrarily than mixing.
Embodiment six: this embodiment and embodiment one are different is that polymer emulsion is a kind of in carboxyl styrene-butadiene emulsion, polyvinyl acetate emulsion, the interpolymer latex of polystyrene and acrylic ester.Other is identical with embodiment one.
Embodiment seven: this embodiment and embodiment one are different is that mineral admixture is one or more the mixing in silicon ash, flyash, zeolite powder, the silica powder.Other is identical with embodiment one.
When mineral admixture is mixture, press between the various mixtures in this embodiment arbitrarily than mixing.
Embodiment eight: the preparation method of carbon nano-tube fiber cement-based material is following in this embodiment: one, dispersing agent for fibre is dissolved in that to be mixed with mass concentration in the organic solvent be 0.1%～10% solution; Then carbon nanotube is joined in the solution; Magnetic agitation 10～60min, ultra-sonic dispersion 10～60min; Thomel is added in the solution after the supersound process, ultra-sonic dispersion 10～60min obtains fiber dispersion then again; Two,, obtain the cement mixing slurry with deionized water, superplasticizer, polymer emulsion, mineral admixture and cement mixing and stirring; Three, the fiber dispersion that step 1 is obtained adds in the cement mixing slurry and stirs 3～5min, the preliminary mixed slurry of fibrocement; Four, preliminary mixed slurry feeding high-shear colloid mill high speed is sheared 5～30min, again with the slurry that the stirs jolt ramming, floating in the die trial of packing into; Five, cover one deck 10～30 purpose copper mesh topmost in die trial; Move in the vacuum drying oven vacuum tightness for-0.01MPa～-0.08MPa, Heating temperature are vacuum defoaming under 30～80 ℃ the condition; Heated volatile solvent 0.5～3h; Form removal behind the 24h is put into relative humidity and is maintenance 28d in 100% the room temperature water again, promptly gets carbon nano-tube fiber cement-based material; Wherein the mass ratio of carbon nanotube and dispersing agent for fibre is 1: 0.5～15 in the step 1, and the mass ratio of thomel and dispersing agent for fibre is 1: 0.1～10, and the mass ratio of carbon nanotube and thomel is 1: 0.5～15; The mass ratio of deionized water and cement is 0.30～0.80: 1 in the step 2; The mass ratio of superplasticizer and cement is 0.005～0.015: 1; The mass ratio of polymer emulsion and cement is 0.05～0.201; The mass ratio of mineral admixture and cement is 0.05～0.15: 1, and the mass ratio of cement is 1: 20～200 in the phosphorus nanotube in the step 3 in the fiber dispersion and the total mass of thomel and the cement mixing slurry.
The toughness reinforcing cement-based material of gained carbon nano-tube fibre in this embodiment adopts three-point bending method to test corresponding fracture toughness property.The SEM that carries out to respective beam test specimen rupture failure face scans; Can find out from corresponding shape appearance figure 1; Strong mechanical force through tensio-active agent supersound process and high-shear colloid mill stirs, and carbon nanotube, thomel are distributed in the matrix well, and have formed good netted pilotaxitic texture; Not only can improve the mechanical strength of cement matrix; And, stop and delay fissured generation, extension, thereby can make the cement matrix of hard brittle material present very high splitting resistance, ductility and toughness because fiber and cement matrix acting in conjunction can brought into play good extract and bridging overlaps effect.
Embodiment nine: this embodiment and embodiment eight are different is that dispersing agent for fibre is a kind of in cationic dispersing agent, anionic dispersing agent, the non-ionic dispersing agent in the step 1, or a kind of combination in non-ionic dispersing agent and cationic dispersing agent, the anionic dispersing agent; Cationic dispersing agent is a cetyl trimethylammonium bromide; Non-ionic dispersing agent is one or more the combination in methylcellulose gum, NATROSOL 250, polyoxyethylene nonylphenol, the gum arabic, and anionic is one or more the combination in X 2073, the ZX-I.
Embodiment ten: this embodiment and embodiment eight are different is that organic solvent in the step 1 is absolute ethyl alcohol, acetone, THF (THF), N (DMF), chloroform, ETHYLE ACETATE or perhydronaphthalene.Other is identical with embodiment eight.
Embodiment 11: this embodiment and embodiment eight are different is that carbon nanotube in the step 1 is that average caliber is that 1nm～200nm, length are the carbon nanotube of 0.1 μ m～20 μ m.Other is identical with embodiment eight.
Embodiment 12: this embodiment and embodiment eight are different is that thomel is that nominal diameter is that 2～7 μ m, length are that the weak point of 1～6mm is cut PAN-based carbon fiber in the step 1.Other is identical with embodiment eight.
Embodiment 13: this embodiment and embodiment eight are different is that superplasticizer in the step 2 is one or more the mixing in β-naphthalene sulfonic salt formaldehyde condensation products series high-efficiency water-reducing agent, sulfonated melamine compound resin series high-efficiency water-reducing agent, the carboxylic acid polyetherester block copolymer series high-efficiency water-reducing agent.Other is identical with embodiment eight.
When superplasticizer is mixture, press between the various mixtures in this embodiment arbitrarily than mixing.
Embodiment 14: this embodiment and embodiment eight are different is that superplasticizer in the step 2 is the FDN-AI high efficiency water reducing agent.Other is identical with embodiment eight.
Embodiment 15: this embodiment and embodiment eight are different is that superplasticizer in the step 2 is the SMF high efficiency water reducing agent.Other is identical with embodiment eight.
Embodiment 16: this embodiment and embodiment eight are different is that superplasticizer in the step 2 is the MPEG-550 high efficiency water reducing agent.Other is identical with embodiment eight.
Embodiment 17: this embodiment and embodiment eight are different is that polymer emulsion in the step 2 is a kind of in carboxyl styrene-butadiene emulsion, polyvinyl acetate emulsion, the interpolymer latex of polystyrene and acrylic ester.Other is identical with embodiment eight.
Embodiment 18: this embodiment and embodiment eight are different is that mineral admixture in the step 2 is one or more mixing in silicon ash, flyash, zeolite powder, the silica powder.Other is identical with embodiment eight.
When mineral admixture is mixture, press between the various mixtures in this embodiment arbitrarily than mixing.
Embodiment 19: this embodiment and embodiment eight are different is that high-shear colloid mill in the step 4 is the combination of a kind of or wherein a kind of and vertical mulser in the horizontal colloidal mill of high-shear, high-shear vertical colloid mill, the horizontal colloidal mill of band bucket type, the tape spool bearing high-shear colloid mill.Other is identical with embodiment eight.
Embodiment 20: the step that this embodiment prepares the toughness reinforcing cement-based material method of carbon nano-tube fibre is following: one, (commodity are called Triton x-100 with the 4.5mL polyoxyethylene nonylphenol; Be called for short Tx10); Join in 100mL absolute ethyl alcohol (EtOH) organic solvent, stirring and dissolving, taking by weighing outside diameter is multi-walled carbon nano-tubes (MWCNT) 0.6g of 60～100nm, length 1～2 μ m; Thomel (CF) 1.5g of nominal diameter 6 μ m, length 3mm; Carbon nanotube and thomel are added in polyoxyethylene nonylphenol and the absolute ethyl alcohol Tx10/EtOH solution, carry out magnetic agitation, the supersound process of 30min respectively, form carbon fibre suspended dispersed liquid; Two, take by weighing 3.0g FDN-AI high efficiency water reducing agent and 15mL interpolymer latex of polystyrene and acrylic ester; The deionized water for stirring that adds 120mL is dissolved fully; Add 30g silicon ash, the stirring of 300g cement again, then fiber dispersion is added the preliminary 3min of stirring in the cement mixing slurry; Three, preliminary mixed slurry feeding high-shear colloid mill high speed is sheared 15min, the slurry that stirs is packed into is of a size of jolt ramming in 160 * 20 * 40mm die trial, floating again; Four, cover one deck 20 purpose copper mesh topmost in die trial; Moving in the vacuum drying oven in temperature is 50 ℃; 2h when holding under the condition of vacuum tightness for-0.06MPa; With volatilization ethanol, eliminate the bubble in the slurry, it is maintenance 28d in 100% the room temperature water that the material after form removal will tentatively be hardened behind the 24h is put into relative humidity, promptly gets the toughness reinforcing cement-based material of carbon nano-tube fibre.
The fracture toughness property ability step of the toughness reinforcing cement-based material of this embodiment test carbon nano-tube fibre is following: in the 160mm long span, cut the into thin long and narrow seam of the 19mm degree of depth, 1mm with the high speed helicoidal saw earlier; Then with lnstron5500R digital electric hydraulic servo testing machine, three-point bending method is tested the energy-to-break of beam test specimen, and then obtains the relevant fragmentation parameters of the toughness reinforcing cement-based material of carbon nano-tube fibre.Wherein with the mid-span deflection of coped beam manipulated variable as test.The load sensor range of trier is 20kN, and precision is taken as 0.005% of its range.The range of deflection metrology transmitter is 10mm, and it measures hysteresis is 0.1% of range, and creep is 0.05% of a range.The energy-to-break G of the corresponding toughness reinforcing cement-based material of carbon nano-tube fibre that records
FAnd fracture toughness K
CIBe respectively 106.3Nm, 0.998MPa/m
-1/2, energy-to-break exceeds 112.6% than the energy-to-break of existing fiber reinforced cement matrix material, and fracture toughness exceeds 33.1% than the fracture toughness of existing fiber reinforced cement matrix material.
Claims (10)
1. carbon nano-tube fiber cement-based material; It is characterized in that what carbon nano-tube fiber cement-based material was processed by dispersing agent for fibre, organic solvent, thomel, carbon nanotube, deionized water, superplasticizer, polymer emulsion, mineral admixture and cement; Wherein the mass ratio of carbon nanotube and dispersing agent for fibre is 1: 0.5～15; The mass ratio of thomel and dispersing agent for fibre is 1: 0.1～10; The mass ratio of carbon nanotube and thomel is 1: 0.5～15, and the mass ratio of deionized water and cement is 0.30～0.80: 1, and the mass ratio of superplasticizer and cement is 0.005～0.015: 1; The mass ratio of polymer emulsion and cement is 0.05～0.20: 1, and the mass ratio of mineral admixture and cement is 0.05～0.15: 1.
2. carbon nano-tube fiber cement-based material according to claim 1; It is characterized in that dispersing agent for fibre is a kind of in cationic dispersing agent, anionic dispersing agent, the non-ionic dispersing agent, or a kind of combination in non-ionic dispersing agent and cationic dispersing agent, the anionic dispersing agent; Cationic dispersing agent is a cetyl trimethylammonium bromide; Non-ionic dispersing agent is one or more the combination in methylcellulose gum, NATROSOL 250, polyoxyethylene nonylphenol, the gum arabic, and anionic is one or more the combination in X 2073, the ZX-I.
3. carbon nano-tube fiber cement-based material according to claim 1 is characterized in that carbon nanotube is that average caliber is that 1nm～200nm, length are the carbon nanotube of 0.1 μ m～20 μ m; Thomel is that nominal diameter is 2～7 μ m, and length is that the weak point of 1～6mm is cut PAN-based carbon fiber; Superplasticizer is one or more the mixing in β-naphthalene sulfonic salt formaldehyde condensation products series high-efficiency water-reducing agent, sulfonated melamine compound resin series high-efficiency water-reducing agent, the carboxylic acid polyetherester block copolymer series high-efficiency water-reducing agent.
4. carbon nano-tube fiber cement-based material according to claim 1 is characterized in that polymer emulsion is a kind of in carboxyl styrene-butadiene emulsion, polyvinyl acetate emulsion, the interpolymer latex of polystyrene and acrylic ester; Mineral admixture is one or more the mixing in silicon ash, flyash, zeolite powder, the silica powder.
5. the method for preparing the described carbon nano-tube fiber cement-based material of claim 1; The preparation method who it is characterized in that carbon nano-tube fiber cement-based material is following: one, dispersing agent for fibre is dissolved in that to be mixed with mass concentration in the organic solvent be 0.1%～10% solution; Then carbon nanotube is joined in the solution, magnetic agitation 10～60min, ultra-sonic dispersion 10～60min add thomel in the solution after the supersound process again; Ultra-sonic dispersion 10～60min obtains fiber dispersion then; Two,, obtain the cement mixing slurry with deionized water, superplasticizer, polymer emulsion, mineral admixture and cement mixing and stirring; Three, the fiber dispersion that step 1 is obtained adds in the cement mixing slurry and stirs 3～5min, the preliminary mixed slurry of fibrocement; Four, preliminary mixed slurry feeding high-shear colloid mill high speed is sheared 5～30min, again with the slurry that the stirs jolt ramming, floating in the die trial of packing into; Five, cover one deck 10～30 purpose copper mesh topmost in die trial; Move in the vacuum drying oven vacuum tightness for-0.01MPa～-0.08MPa, Heating temperature are vacuum defoaming under 30～80 ℃ the condition; Heated volatile solvent 0.5～3h; Form removal behind the 24h is put into relative humidity and is maintenance 28d in 100% the room temperature water again, promptly gets carbon nano-tube fiber cement-based material; Wherein the mass ratio of carbon nanotube and dispersing agent for fibre is 1: 0.5～15 in the step 1, and the mass ratio of thomel and dispersing agent for fibre is 1: 0.1～10, and the mass ratio of carbon nanotube and thomel is 1: 0.5～15; The mass ratio of deionized water and cement is 0.30～0.80: 1 in the step 2; The mass ratio of superplasticizer and cement is 0.005～0.015: 1; The mass ratio of polymer emulsion and cement is 0.05～0.20: 1; The mass ratio of mineral admixture and cement is 0.05～0.15: 1, and the mass ratio of cement is 1: 20～200 in the carbon nanotube in the step 3 in the fiber dispersion and the total mass of thomel and the cement mixing slurry.
6. the preparation method of carbon nano-tube fiber cement-based material according to claim 5; It is characterized in that dispersing agent for fibre in the step 1 is a kind of in cationic dispersing agent, anionic dispersing agent, the non-ionic dispersing agent, or a kind of combination in non-ionic dispersing agent and cationic dispersing agent, the anionic dispersing agent; Cationic dispersing agent is a cetyl trimethylammonium bromide; Non-ionic dispersing agent is one or more the combination in methylcellulose gum, NATROSOL 250, polyoxyethylene nonylphenol, the gum arabic, and anionic is one or more the combination in X 2073, the ZX-I.
7. the preparation method of carbon nano-tube fiber cement-based material according to claim 5 is characterized in that the organic solvent in the step 1 is absolute ethyl alcohol, acetone, THF, N, chloroform, ETHYLE ACETATE or perhydronaphthalene.
8. the preparation method of carbon nano-tube fiber cement-based material according to claim 5 is characterized in that the carbon nanotube in the step 1 is that average caliber is that 1nm～200nm, length are the carbon nanotube of 0.1 μ m～20 μ m; Thomel is that nominal diameter is that 2～7 μ m, length are that the weak point of 1～6mm is cut PAN-based carbon fiber.
9. the preparation method of carbon nano-tube fiber cement-based material according to claim 5 is characterized in that superplasticizer in the step 2 is one or more the mixing in β-naphthalene sulfonic salt formaldehyde condensation products series high-efficiency water-reducing agent, sulfonated melamine compound resin series high-efficiency water-reducing agent, the carboxylic acid polyetherester block copolymer series high-efficiency water-reducing agent.
10. the preparation method of carbon nano-tube fiber cement-based material according to claim 5 is characterized in that polymer emulsion in the step 2 is a kind of in carboxyl styrene-butadiene emulsion, polyvinyl acetate emulsion, the interpolymer latex of polystyrene and acrylic ester; Mineral admixture is one or more mixing in silicon ash, flyash, zeolite powder, the silica powder.
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