CN112441791A - Novel conductive polymer composite material and preparation method thereof - Google Patents
Novel conductive polymer composite material and preparation method thereof Download PDFInfo
- Publication number
- CN112441791A CN112441791A CN202010719487.4A CN202010719487A CN112441791A CN 112441791 A CN112441791 A CN 112441791A CN 202010719487 A CN202010719487 A CN 202010719487A CN 112441791 A CN112441791 A CN 112441791A
- Authority
- CN
- China
- Prior art keywords
- conductive polymer
- polymer composite
- composite material
- stirring
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C04B28/04—Portland cements
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
- C04B24/42—Organo-silicon compounds
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/90—Electrical properties
- C04B2111/94—Electrically conducting materials
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the field of functional composite materials, and particularly relates to a novel dehumidifying conductive polymer composite material and a preparation method thereof. The technical points are as follows: the composition comprises the following components in parts by weight: 100-200 parts of cement, 100-360 parts of medium sand, 0.2-2.6 parts of conductive filler, 5-25 parts of polymer, 5-12 parts of silica fume, 3-16 parts of expanding agent, 0.1-0.6 part of dispersing agent, 0.05-0.2 part of defoaming agent, 1.0-2.8 parts of water reducing agent and 30-65 parts of water. The invention provides a novel conductive polymer composite material which has the performances of dehumidification, electric conduction, impermeability, corrosion resistance, mechanics, durability and the like, and the flexibility and the waterproof performance of the composite material can be improved by doping the polymer, so that the novel conductive polymer composite material is more suitable for humid environments such as underground tunnels and the like.
Description
Technical Field
The invention belongs to the field of functional composite materials, and particularly relates to a novel dehumidifying conductive polymer composite material and a preparation method thereof.
Background
The impermeability, moisture resistance, dehumidification and corrosion resistance of cement-based materials and composite materials of building structures are important technical problems to be overcome in the field of underground engineering, and the requirements of the public on the humidity control of the building structures gradually rise along with the optimization of the use performance of building spaces and the promotion of multifunctional requirements. At present, the traditional impervious and damp-proof methods for underground buildings mainly comprise waterproof paint brushing, waterproof coiled material covering, crack grouting and water proofing, waterproof agent doping, external drainage method and the like. The traditional anti-seepage dehumidification method has certain limitations and has the problems of short damp-proof time efficiency, incomplete dehumidification, high repair rate and the like.
In view of the defects existing in the existing cement-based materials, the inventor of the invention actively researches and innovates based on practical experience and professional knowledge which are abundant for years when the products are designed and manufactured, and by matching with the application of theory, so as to create a novel dehumidifying conductive polymer composite material and a preparation method thereof. After continuous research and design and repeated trial production and improvement, the invention with practical value is finally created.
Disclosure of Invention
The first purpose of the invention is to provide a novel conductive polymer composite material, which has the performances of dehumidification, electric conduction, permeability resistance, corrosion resistance, mechanics, durability and the like, and the flexibility and the waterproof performance of the composite material can be improved by doping the polymer, so that the novel conductive polymer composite material is more suitable for the humid environment such as an underground tunnel and the like.
The technical purpose of the invention is realized by the following technical scheme:
the invention provides a novel conductive polymer composite material which comprises the following components in parts by weight:
further, the conductive filler is a mixture of graphene, chopped carbon fiber and conductive carbon black powder.
Further, the graphene is graphene oxide, and the purity is more than 99%.
Further, the conductive filler comprises graphene, chopped carbon fiber and conductive carbon black powder, the carbon fiber is partially replaced by the graphene and the carbon black in a ratio of 30% -50%, and the doping amount of the graphene in the mixed substitute is 0-2%.
Furthermore, the graphene is graphene oxide, the purity of the graphene is more than 99%, the thickness of the graphene is 0.55-1.2 nm, and the number of layers is 1-5.
Furthermore, the diameter of the chopped carbon fiber is less than 8 μm, the length of the chopped carbon fiber is (5-10) mm, the tensile modulus of the chopped carbon fiber is more than or equal to 210GPa, and the resistivity of the chopped carbon fiber is (1.0-1.5) omega cm, so that the carbon fiber can form a better conductive network and embed conductive carbon black powder into the grid of the network, the dispersibility of the conductive network is improved, the mechanical property and the crack and toughness of the mortar are improved while the conductivity is improved, and the reinforcing effect of the fiber is better.
Furthermore, the purity of the carbon black is more than or equal to 95%, the particle size is less than 15mm, the resistivity is (95-105) omega cm, the cost is reduced, the conductivity is not reduced, and the mechanical property and the working property of the pure fiber mortar are improved.
Further, the cement is 42.5 portland cement.
Further, the silica fume had a specific surface area of 22m2The silica fume with high activity has the grain size of 0.1-0.3 mu m, and can improve the specific resistance and the conductivity of the mortar while improving the strength, the durability, the impermeability and the corrosion resistance of the mortar.
Further, the apparent density of the sand was 2580kg/m3The bulk density was 1460kg/m3The particle composition belongs to the II-zone composition, the cumulative screen residue rates of the II-zone composition (0.16,0.315,0.63,1.25,2.5,5,10mm) round hole screens are respectively 100-90, 92-70, 70-41, 50-10, 25-0, 10-0, and 0 the mortar using the composition has good working and mechanical properties.
Further, the water reducing agent is a polycarboxylic acid water reducing agent, and the water reducing rate is about 30-40%.
Further, the dispersant is methyl cellulose.
Further, the defoaming agent is tributyl phosphate.
Further, the main components of the expanding agent are CaO and MgO, wherein the mass ratio of CaO is 40-45%
Further, the polymer is a mixture of water-based epoxy resin and organic modified styrene-acrylic emulsion.
Furthermore, the solid content of the water-based epoxy resin is (35-50)%, the epoxy value is 0.2, and the specific gravity is 1100kg/m3The pH was 7.
Furthermore, the organic modified styrene-acrylic emulsion is organic silicon fluorine modified styrene-acrylic emulsion, the wear resistance, the oxidation resistance and the waterproof performance of the polymer mortar are enhanced through organic siloxane modification, and the alkali resistance and the corrosion resistance of the polymer mortar are improved through organic fluorine modification.
Further, the organic modified styrene-acrylic emulsion comprises the following raw materials in parts by mass: 5% of butyl acrylate, 6% of styrene, 3% of acrylic acid, 5% of sodium dodecyl sulfate, 3% of potassium persulfate, 10% of methyl methacrylate, 8% of nonylphenol polyoxyethylene ether, 20% of N-butyl acrylate, 2% of hydroquinone, 2% of sodium bicarbonate, 1% of ethylene glycol, 4% of acrylamide, 6% of gamma-methacryloxypropyltrimethoxysilane, 8% of N-ethyl-N-hydroxyethyl perfluorooctylsulfonamide and the balance of ammonia water and deionized water.
Further, the preparation of the organic modified styrene-acrylic emulsion comprises the following steps: (a) adding a proper amount of water and sodium dodecyl sulfate into a three-neck flask, stirring and dissolving, then sequentially adding styrene, acrylic acid, butyl acrylate, methyl methacrylate and nonylphenol polyoxyethylene ether, quickly stirring the mixed monomer for 15min at room temperature, then slowly stirring for 15min to obtain a pre-emulsified monomer, and pouring the pre-emulsified monomer into a constant-pressure dropping funnel for later use. (b) 2/3, adding gamma-methacryloxypropyltrimethoxysilane, N-ethyl-N-hydroxyethyl perfluorooctylsulfonamide, N-butyl acrylate, hydroquinone, acrylamide and glycol into the pre-emulsified monomer, and stirring and emulsifying at room temperature for 40min to obtain a monomer modified pre-emulsion. (c) Weighing potassium persulfate and dissolving in a small amount of water to prepare an initiator solution, then placing the monomer modified pre-emulsion in a constant-pressure dropping funnel at 60 ℃, adding 30% of the monomer modified pre-emulsion and 50% of the initiator solution into a three-neck flask, stirring and heating to 80 ℃, and keeping the temperature for 30min after blue fluorescence appears in the flask. Finally, the residual monomer modified pre-emulsion and the initiator solution are dripped into the flask, and the dripping is completed within 2.5 h. After the dropwise addition, cooling the solution to below 40 ℃, and adding ammonia water to adjust the pH value of the solution to be neutral to obtain the organic modified styrene-acrylic emulsion.
The second purpose of the invention is to provide a preparation method of the novel conductive polymer composite material, which has the same effect.
The technical effects of the invention are realized by the following technical scheme:
the invention provides a preparation method of a novel conductive polymer composite material, which comprises the following operation steps:
s1, adding quantitative water into a constant-temperature water bath box, keeping the temperature to 60 ℃, slowly adding 0.4% of dispersant methyl cellulose into the water, stirring at a constant speed until the dispersant methyl cellulose is fully dissolved, then adding short carbon fibers, fully stirring, and adding a defoaming agent in the stirring process to obtain a mixture A;
s2, transferring the mixture A obtained in the step S1 to an ultrasonic cleaner, and ultrasonically dispersing for 0.5-1 h to obtain the carbon fiber dispersion liquid.
S3, dry-mixing the sand, the cement, the silica fume, the carbon black and the expanding agent in a cement paste mixer for 1min, adding the carbon fiber dispersion liquid obtained in the step S2 along with a water reducing agent and water, and stirring to obtain slurry;
and S4, adding the polymer emulsion into the slurry obtained in the step S3, stirring for 120S, pausing for 15S, and then quickly stirring for 120S to obtain composite slurry, namely the conductive polymer composite material.
In conclusion, the invention has the following beneficial effects:
1. compared with common hardened cement-based materials, the conductive polymer composite material has good performances of electric conduction, heat conduction, dehumidification, alertness, toughening and the like. According to the invention, a proper amount of polymer is introduced on the basis of the conductive material so as to improve the flexibility, the waterproofness, the impermeability and the weather resistance of the composite material. The conductive polymer composite material prepared by the invention has high compressive strength and rupture strength, low resistivity, and good toughness and waterproof performance.
2. The invention realizes the effective and uniform dispersion of the carbon nano material in the polymer cement matrix by reasonably selecting the dispersant and improving the stirring process, and ensures that the functional material is well combined with the interface of the cement matrix.
3. The polymer material is easy to produce large-degree shrinkage cracking of cement slurry due to volume shrinkage during curing, the self-made calcium-magnesium expanding agent is introduced to compensate the shrinkage cracking, and the carbon fiber is added to inhibit the cracking and increase the cracking resistance of the material.
4. The invention can select proper proportion according to the use and construction conditions and requirements to control the dehumidification, the waterproof, the electric conduction, the toughness, the mechanical property and the like of the conductive polymer composite material.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the detailed description of the novel conductive polymer composite material and the preparation method thereof according to the present invention are provided below.
Example 1: a novel conductive polymer composite material and a preparation method thereof, which comprises the following components
The preparation process and test results are as follows:
s1, adding quantitative water into a constant-temperature water bath box, keeping the temperature to 60 ℃, slowly adding 0.4% of dispersant methyl cellulose into the water, stirring at a constant speed until the dispersant methyl cellulose is fully dissolved, then adding short carbon fibers, fully stirring, and adding a defoaming agent in the stirring process to obtain a mixture A;
s2, transferring the mixture A obtained in the step S1 to an ultrasonic cleaner, and ultrasonically dispersing for 0.5-1 h to obtain the carbon fiber dispersion liquid.
S3, dry-mixing the sand, the cement, the silica fume, the carbon black and the expanding agent in a cement paste mixer for 1min, adding the carbon fiber dispersion liquid obtained in the step S2 along with a water reducing agent and water, and stirring to obtain slurry;
and S4, adding the polymer emulsion into the slurry obtained in the step S3, stirring for 120S, pausing for 15S, and then quickly stirring for 120S to obtain composite slurry, namely the conductive polymer composite material.
Slurry is poured into 40 in two times40×160mm3And 20X 20mm3Vibrating in a mould to form, wherein 4 pieces of 30 multiplied by 50mm are pre-embedded in the mould at positions 10mm away from two ends of a test piece and 40mm away from the center2Copper mesh electrodes, 2 pieces of 16X 30mm pre-embedded in the position 5mm away from the two ends of the test piece2All electrode plates are vertically inserted into the bottom of the test piece; the test refers to the specifications of concrete admixture homogeneity test method, building mortar basic performance test method standard, polymer modified cement mortar test procedure and the like, and various performance tests of the conductive polymer material are carried out.
The 28d compressive strength, the flexural ratio, the consistency, the 28d resistivity, the water absorption and the dehumidification efficiency of the synchronous grouting slurry prepared by the components and the method are respectively 22.2MPa, 6.8MPa, 0.31, 83.53mm, 52.51 omega-m, 2.08 percent, 5.076 g-m-3·℃-1·min-1。
Example 2: a novel conductive polymer composite material and a preparation method thereof comprise the following components:
the preparation process and test results are as follows:
s1, adding quantitative water into a constant-temperature water bath box, keeping the temperature to 60 ℃, slowly adding 0.4% of dispersant methyl cellulose into the water, stirring at a constant speed until the dispersant methyl cellulose is fully dissolved, then adding short carbon fibers, fully stirring, and adding a defoaming agent in the stirring process to obtain a mixture A;
s2, transferring the mixture A obtained in the step S1 to an ultrasonic cleaner, and ultrasonically dispersing for 0.5-1 h to obtain the carbon fiber dispersion liquid.
S3, dry-mixing the sand, the cement, the silica fume, the carbon black and the expanding agent in a cement paste mixer for 1min, adding the carbon fiber dispersion liquid obtained in the step S2 along with a water reducing agent and water, and stirring to obtain slurry;
and S4, adding the polymer emulsion into the slurry obtained in the step S3, stirring for 120S, pausing for 15S, and then quickly stirring for 120S to obtain composite slurry, namely the conductive polymer composite material.
The slurry is evenly poured into the size of 40mm multiplied by 160mm in two times3And 20X 20mm3Vibrating in a mould to form, wherein 4 pieces of 30 multiplied by 50mm are pre-embedded in the mould at positions 10mm away from two ends of a test piece and 40mm away from the center2Copper mesh electrodes, 2 pieces of 16X 30mm pre-embedded in the position 5mm away from the two ends of the test piece2All electrode plates are vertically inserted into the bottom of the test piece;
and S3, testing various performances of the conductive polymer mortar according to the specifications of a concrete additive homogeneity test method, a building mortar basic performance test method standard, a polymer modified cement mortar test procedure and the like. The 28d compressive strength, the flexural ratio, the consistency, the 28d resistivity, the water absorption and the dehumidification efficiency of the synchronous grouting slurry prepared by the components and the method are respectively 24.2MPa, 7.7MPa, 0.32, 78.76mm, 27.86 omega-m, 1.78 percent, 7.041 g-m, measured according to the specification-3·℃-1·min-1。
Example 3: a novel conductive polymer composite material and a preparation method thereof comprise the following components:
the preparation process and test results are as follows:
s1, adding quantitative water into a constant-temperature water bath tank, keeping the temperature to 60 ℃, slowly adding 0.4% of dispersant methyl cellulose into the water, stirring at a constant speed until the dispersant methyl cellulose is fully dissolved, then adding calculated amount of chopped carbon fibers, fully stirring, adding 0.15% of defoaming agent in the stirring process to eliminate redundant bubbles, then transferring the prepared carbon fiber dispersion liquid to an ultrasonic cleaner, and ultrasonically dispersing for 0.5-1 h to finally obtain well-dispersed carbon fiber dispersion liquid;
s2, mixing sand, cement, silica fume and carbon blackDry materials such as graphene and expanding agent are dry-mixed in a cement paste mixer for 1min, then the carbon fiber dispersion liquid is added into the dry materials along with a water reducing agent and water to be mixed, then the needed polymer emulsion is added into the slurry to be mixed, the mixture is slowly mixed for 120s, temporarily stopped for 15s and quickly mixed for 120s to obtain a new mixed composite slurry, and the slurry is evenly poured into a slurry body with the size of 40 multiplied by 160mm for two times3And 20X 20mm3Vibrating in a mould to form, wherein 4 pieces of 30 multiplied by 50mm are pre-embedded in the mould at positions 10mm away from two ends of a test piece and 40mm away from the center2Copper mesh electrodes, 2 pieces of 16X 30mm pre-embedded in the position 5mm away from the two ends of the test piece2And all electrode plates of the copper electrode are vertically inserted into the bottom of the test piece.
S3, testing each performance of the conductive polymer mortar according to the specifications of a concrete additive homogeneity test method, a building mortar basic performance test method standard, a polymer modified cement mortar test procedure and the like.
The 28d compressive strength, the 28d flexural strength, the flexural ratio, the consistency, the 28d resistivity, the water absorption and the dehumidification efficiency of the synchronous grouting slurry prepared by the components and the method are respectively 38.2MPa, 8.4MPa, 0.22, 84.62mm, 22.40 omega-m, 1.98 percent and 8.301 g-m according to the specification-3·℃-1·min-1。
Example 4: a novel conductive polymer composite material and a preparation method thereof comprise the following components:
the preparation process and test results are as follows:
s1, adding quantitative water into a constant-temperature water bath box, and keeping the constant temperature to 60 ℃. Slowly adding 0.4% of dispersant methylcellulose into water, and stirring at constant speed until the methylcellulose is fully dissolved. And adding the calculated amount of chopped carbon fibers, fully stirring, adding 0.15% of defoaming agent in the stirring process to eliminate redundant bubbles, transferring the prepared carbon fiber dispersion liquid to an ultrasonic cleaner, and ultrasonically dispersing for 0.5-1 h to finally obtain the well-dispersed carbon fiber dispersion liquid.
S2, dry-mixing dry materials such as sand, cement, silica fume, carbon black, graphene and an expanding agent in a cement paste mixer for 1min, adding the carbon fiber dispersion liquid into the dry materials along with a water reducing agent and water, stirring, adding the needed polymer emulsion into the slurry, stirring for 120s at a slow speed, pausing for 15s, stirring for 120s at a fast speed to obtain a new-mixed composite slurry, uniformly pouring the slurry into a slurry body with the size of 40 multiplied by 160mm for two times3And 20X 20mm3Vibrating in a mould to form, wherein 4 pieces of 30 multiplied by 50mm are pre-embedded in the mould at positions 10mm away from two ends of a test piece and 40mm away from the center2Copper mesh electrodes, 2 pieces of 16X 30mm pre-embedded in the position 5mm away from the two ends of the test piece2And all electrode plates of the copper electrode are vertically inserted into the bottom of the test piece.
And S3, performing various performance tests on the conductive polymer mortar by taking the specifications of a concrete additive homogeneity test method, a building mortar basic performance test method standard, a polymer modified cement mortar test procedure and the like as test bases.
The 28d compressive strength, the 28d flexural strength, the flexural ratio, the consistency, the 28d resistivity, the water absorption and the dehumidification efficiency of the synchronous grouting slurry prepared by the components and the method are respectively 42.8MPa, 10.6MPa, 0.25, 88.90mm, 18.1 omega-m, 1.65 percent and 9.099 g-m according to the specification-3·℃-1·min-1。
Comparative example 1: a novel conductive polymer composite material and a preparation method thereof comprise the following components:
the preparation process and test results are as follows:
s1, adding quantitative water into a constant-temperature water bath box, keeping the temperature to 60 ℃, slowly adding 0.4% of dispersant methyl cellulose into the water, and stirring at a constant speed until the dispersant methyl cellulose is fully dissolved. And adding the calculated amount of chopped carbon fibers, fully stirring, adding 0.15% of defoaming agent in the stirring process to eliminate redundant bubbles, transferring the prepared carbon fiber dispersion liquid to an ultrasonic cleaner, and ultrasonically dispersing for 0.5-1 h to finally obtain the well-dispersed carbon fiber dispersion liquid.
S2, dry-mixing dry materials such as sand, cement, silica fume, carbon black, an expanding agent and the like in a cement paste mixer for 1min, adding the carbon fiber dispersion liquid into the dry materials along with a water reducing agent and water, stirring, adding the needed polymer emulsion into the slurry, stirring for 120s slowly, pausing for 15s, stirring for 120s quickly to obtain a new-mixed composite slurry, uniformly pouring the slurry into a mixer with the size of 40 multiplied by 160mm for two times3And 20X 20mm3Vibrating in a mould to form, wherein 4 pieces of 30 multiplied by 50mm are pre-embedded in the mould at positions 10mm away from two ends of a test piece and 40mm away from the center2Copper mesh electrodes, 2 pieces of 16X 30mm pre-embedded in the position 5mm away from the two ends of the test piece2And all electrode plates of the copper electrode are vertically inserted into the bottom of the test piece.
And S3, testing various performances of the conductive polymer mortar according to the specifications of a concrete additive homogeneity test method, a building mortar basic performance test method standard, a polymer modified cement mortar test procedure and the like.
The 28d compressive strength, the 28d flexural strength, the flexural ratio, the consistency, the 28d resistivity, the water absorption and the dehumidification efficiency of the synchronous grouting slurry prepared by the components and the method are respectively 20.0MPa, 5.6MPa, 0.28, 77.75mm, 56.31 omega-m, 2.28 percent and 3.765 g-m according to the specification-3·℃-1·min-1。
Comparative example 1: a white self-cleaning concrete comprises the following components: 100g of white portland cement, 30g of white mineral powder, 30g of white limestone powder, 15g of metakaolin, 10g of titanium dioxide, 200g of river sand, 150g of light-color aggregate, 50g of water, 3g of water reducer and 0.5g of retarder.
The preparation method comprises the following steps:
s1, mixing 100g of white portland cement, 30g of white mineral powder, 30g of white limestone powder, 15g of metakaolin and 10g of titanium dioxide with water, and stirring for 5-7 hours to obtain a mixture A;
s2, adding 200g of river sand, 150g of light-color aggregate, 50g of water, 3g of water reducing agent and 0.5g of retarder into the mixture A, and continuously stirring to obtain the white self-cleaning concrete.
Comparative example 2
1) Adding quantitative water into a constant temperature water bath tank, and keeping the constant temperature to 60 ℃. Slowly adding 0.4% of dispersant methylcellulose into water, and stirring at constant speed until the methylcellulose is fully dissolved. And adding the calculated amount of chopped carbon fibers, fully stirring, adding 0.15% of defoaming agent in the stirring process to eliminate redundant bubbles as far as possible, transferring the prepared carbon fiber dispersion liquid to an ultrasonic cleaner, and ultrasonically dispersing for 0.5-1 h to finally obtain the well-dispersed carbon fiber dispersion liquid.
2) Dry-mixing dry materials such as cement, sand, silica fume, carbon black, expanding agent and the like in a cement paste mixer for 1min, adding the carbon fiber dispersion liquid into the dry materials along with a water reducing agent and water, stirring, adding the needed polymer emulsion into the slurry, stirring for 120s slowly, pausing for 15s, stirring for 120s quickly to obtain a new-mixed composite slurry, uniformly pouring the slurry into a mixer with the size of 40 multiplied by 160mm for two times3And 20X 20mm3Vibrating in a mould to form, wherein 4 pieces of 30 multiplied by 50mm are pre-embedded in the mould at positions 10mm away from two ends of a test piece and 40mm away from the center2Copper mesh electrodes, 2 pieces of 16X 30mm pre-embedded in the position 5mm away from the two ends of the test piece2And all electrode plates of the copper electrode are vertically inserted into the bottom of the test piece.
3) The test refers to the specifications of concrete admixture homogeneity test method, building mortar basic performance test method standard, polymer modified cement mortar test procedure and the like, and various performance tests of the conductive polymer mortar are carried out.
The 28d compressive strength, the 28d flexural strength, the flexural ratio, the consistency, the 28d resistivity, the water absorption and the dehumidification efficiency of the synchronous grouting slurry prepared by the components and the method are respectively 18.2MPa, 5.4MPa, 0.297, 75.24mm, 58.67 omega-m, 2.14 percent and 4.149 g-m according to the specification-3·℃-1·min-1。
Comparative example 3: comprises the following components:
1) adding quantitative water into a constant temperature water bath tank, and keeping the constant temperature to 60 ℃. Slowly adding 0.4% of dispersant methylcellulose into water, and stirring at constant speed until the methylcellulose is fully dissolved. And adding the calculated amount of chopped carbon fibers, fully stirring, adding 0.15% of defoaming agent in the stirring process to eliminate redundant bubbles, transferring the prepared carbon fiber dispersion liquid to an ultrasonic cleaner, and ultrasonically dispersing for 0.5-1 h to finally obtain the well-dispersed carbon fiber dispersion liquid.
2) Dry materials such as sand, cement, carbon black, an expanding agent and the like in a cement paste mixer for 1min, then add the carbon fiber dispersion liquid into the dry materials along with a water reducing agent and water for stirring, then add the needed polymer emulsion into the slurry for stirring, slowly stir for 120s, pause for 15s, and quickly stir for 120s to obtain a new mixed composite slurry, and then evenly pour the slurry into a slurry body with the size of 40 multiplied by 160mm by twice3And 20X 20mm3Vibrating in a mould to form, wherein 4 pieces of 30 multiplied by 50mm are pre-embedded in the mould at positions 10mm away from two ends of a test piece and 40mm away from the center2Copper mesh electrodes, 2 pieces of 16X 30mm pre-embedded in the position 5mm away from the two ends of the test piece2And all electrode plates of the copper electrode are vertically inserted into the bottom of the test piece.
3) The test refers to the specifications of concrete admixture homogeneity test method, building mortar basic performance test method standard, polymer modified cement mortar test procedure and the like, and various performance tests of the conductive polymer mortar are carried out.
The 28d compressive strength, the 28d flexural strength, the flexural ratio, the consistency, the 28d resistivity, the water absorption and the dehumidification efficiency of the synchronous grouting slurry prepared by the components and the method are respectively 21.3MPa, 6.0MPa, 0.282, 85.17mm, 60.29 omega-m, 2.20 percent and 2.986 g-m according to the specification-3·℃-1·min-1。
The comparison of the performances of the conductive polymer cement-based composite materials prepared in the embodiments 1 to 4 and the comparative embodiments 1 to 3 are respectively shown in the following tables 1 and 2:
table 1 comparison of properties of composites
Table 2 comparative examples comparison of properties of composites
According to test results, the conductive polymer cement-based composite material provided by the invention has good physical and mechanical properties, toughness, conductivity and waterproof performance.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The novel conductive polymer composite material is characterized by comprising the following components in parts by weight:
2. the novel conductive polymer composite of claim 1, wherein the conductive filler is a powder mixture of graphene, chopped carbon fiber and conductive carbon black.
3. The novel conductive polymer composite of claim 2, wherein the graphene is graphene oxide with a purity > 99%.
4. The novel conductive polymer composite according to claim 1, wherein the dispersant is methylcellulose.
5. The novel conductive polymer composite of claim 1, wherein the defoamer is tributyl phosphate.
6. The novel conductive polymer composite material as claimed in claim 1, wherein the swelling agent comprises CaO and MgO, wherein CaO is 40-45% by mass.
7. The novel conductive polymer composite material as claimed in claim 1, wherein the polymer is a mixture of an aqueous epoxy resin and an organically modified styrene-acrylic emulsion.
8. The novel conductive polymer composite material as claimed in claim 7, wherein the organically modified styrene-acrylic emulsion is an organosilicone fluoride-modified styrene-acrylic emulsion.
9. The novel conductive polymer composite material as claimed in claim 8, wherein the organic modified styrene-acrylic emulsion comprises the following raw materials in parts by mass: 5% of butyl acrylate, 6% of styrene, 3% of acrylic acid, 5% of sodium dodecyl sulfate, 3% of potassium persulfate, 10% of methyl methacrylate, 8% of nonylphenol polyoxyethylene ether, 20% of N-butyl acrylate, 2% of hydroquinone, 2% of sodium bicarbonate, 1% of ethylene glycol, 4% of acrylamide, 6% of gamma-methacryloxypropyltrimethoxysilane, 8% of N-ethyl-N-hydroxyethyl perfluorooctylsulfonamide and the balance of ammonia water and deionized water.
10. The preparation method of the novel conductive polymer composite material is characterized by comprising the following operation steps:
s1, adding quantitative water into a constant-temperature water bath box, keeping the temperature to 60 ℃, slowly adding 0.4% of dispersant methyl cellulose into the water, stirring at a constant speed until the dispersant methyl cellulose is fully dissolved, then adding short carbon fibers, fully stirring, and adding a defoaming agent in the stirring process to obtain a mixture A;
s2, transferring the mixture A obtained in the step S1 to an ultrasonic cleaner, and ultrasonically dispersing for 0.5-1 h to obtain the carbon fiber dispersion liquid.
S3, dry-mixing the sand, the cement, the silica fume, the carbon black and the expanding agent in a cement paste mixer for 1min, adding the carbon fiber dispersion liquid obtained in the step S2 along with a water reducing agent and water, and stirring to obtain slurry;
and S4, adding the polymer emulsion into the slurry obtained in the step S3, stirring for 120S, pausing for 15S, and then quickly stirring for 120S to obtain composite slurry, namely the conductive polymer composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010719487.4A CN112441791A (en) | 2020-07-23 | 2020-07-23 | Novel conductive polymer composite material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010719487.4A CN112441791A (en) | 2020-07-23 | 2020-07-23 | Novel conductive polymer composite material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112441791A true CN112441791A (en) | 2021-03-05 |
Family
ID=74733636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010719487.4A Pending CN112441791A (en) | 2020-07-23 | 2020-07-23 | Novel conductive polymer composite material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112441791A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113861352A (en) * | 2021-09-14 | 2021-12-31 | 科之杰新材料集团有限公司 | Ligand, conductive water reducer, conductive cement-based composite material and preparation method thereof |
| CN115353337A (en) * | 2022-08-25 | 2022-11-18 | 广东复特新型材料科技有限公司 | Graphene paper composite filler conductive mortar and preparation method thereof |
| CN117865544A (en) * | 2023-12-21 | 2024-04-12 | 科顺民用建材有限公司 | RGO modified polymer emulsion and preparation method thereof, mortar composition, electromagnetic shielding waterproof mortar and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105439506A (en) * | 2015-12-01 | 2016-03-30 | 南京航空航天大学 | Water-borne epoxy resin modified cement mortar repair material and preparation method thereof |
| CN107010893A (en) * | 2017-04-10 | 2017-08-04 | 河海大学 | A kind of graphene/carbon nano-tube cement group water-proofing material and preparation method thereof |
| CN107445525A (en) * | 2017-09-06 | 2017-12-08 | 黑龙江大学 | A kind of conducting concrete for mixing graphite tailing and its preparation method and application |
| US20180370854A1 (en) * | 2015-07-08 | 2018-12-27 | Stc.Unm | Electrically and Thermally Conductive Polymer Concrete |
| CN109503067A (en) * | 2018-11-19 | 2019-03-22 | 青岛崇置混凝土工程有限公司 | Light aggregate concrete and preparation method thereof |
| CN110804128A (en) * | 2019-11-27 | 2020-02-18 | 广东泰强化工实业有限公司 | Silicon-fluorine modified styrene-acrylic emulsion and preparation method thereof |
-
2020
- 2020-07-23 CN CN202010719487.4A patent/CN112441791A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180370854A1 (en) * | 2015-07-08 | 2018-12-27 | Stc.Unm | Electrically and Thermally Conductive Polymer Concrete |
| CN105439506A (en) * | 2015-12-01 | 2016-03-30 | 南京航空航天大学 | Water-borne epoxy resin modified cement mortar repair material and preparation method thereof |
| CN107010893A (en) * | 2017-04-10 | 2017-08-04 | 河海大学 | A kind of graphene/carbon nano-tube cement group water-proofing material and preparation method thereof |
| CN107445525A (en) * | 2017-09-06 | 2017-12-08 | 黑龙江大学 | A kind of conducting concrete for mixing graphite tailing and its preparation method and application |
| CN109503067A (en) * | 2018-11-19 | 2019-03-22 | 青岛崇置混凝土工程有限公司 | Light aggregate concrete and preparation method thereof |
| CN110804128A (en) * | 2019-11-27 | 2020-02-18 | 广东泰强化工实业有限公司 | Silicon-fluorine modified styrene-acrylic emulsion and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| RONG WANG等: "Experimental study on dehumidification and chlorine-removal efficiency of conductive polymer mortar", 《CONSTRUCTION AND BUILDING MATERIALS》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113861352A (en) * | 2021-09-14 | 2021-12-31 | 科之杰新材料集团有限公司 | Ligand, conductive water reducer, conductive cement-based composite material and preparation method thereof |
| CN113861352B (en) * | 2021-09-14 | 2023-08-29 | 科之杰新材料集团有限公司 | Ligand, conductive water reducer, conductive cement-based composite material and preparation method thereof |
| CN115353337A (en) * | 2022-08-25 | 2022-11-18 | 广东复特新型材料科技有限公司 | Graphene paper composite filler conductive mortar and preparation method thereof |
| CN115353337B (en) * | 2022-08-25 | 2023-04-11 | 广东复特新型材料科技有限公司 | Graphene paper composite filler conductive mortar and preparation method thereof |
| CN117865544A (en) * | 2023-12-21 | 2024-04-12 | 科顺民用建材有限公司 | RGO modified polymer emulsion and preparation method thereof, mortar composition, electromagnetic shielding waterproof mortar and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112441791A (en) | Novel conductive polymer composite material and preparation method thereof | |
| CN106007587B (en) | A kind of 3D printing mortar and preparation method thereof | |
| CN110105029B (en) | Waterproof thermal insulation mortar for 3D printing building and preparation method and application thereof | |
| CN108530001A (en) | A kind of white wall facing mortar prepared by carbide slag | |
| CN107572969B (en) | Sea sand ultrahigh-performance concrete and preparation method thereof | |
| CN107056214B (en) | A kind of fluorite cream base mending mortar | |
| Hang et al. | Freezing-thawing damage characteristics and calculation models of aerated concrete | |
| CN108238777B (en) | Glass fiber reinforced cement and preparation method thereof | |
| CN108947424A (en) | A kind of fiber reinforcement reinforcing bar sleeve for connection grouting material and preparation method thereof | |
| CN109356160B (en) | Construction method of mass concrete | |
| CN104386969B (en) | A kind of high-strength high-durability lightweight aggregate concrete and preparation method thereof | |
| CN109748554A (en) | Lightweight aggregate concrete and its preparation process | |
| Barbero-Barrera et al. | Influence of the addition of waste graphite powder on the physical and microstructural performance of hydraulic lime pastes | |
| CN114213094B (en) | Regenerated ceramic powder geopolymer repair mortar and preparation method thereof | |
| CN111138136A (en) | Anti-cracking cement | |
| CN109020420A (en) | A kind of reinforcing bar sleeve for connection grouting material and preparation method thereof with rust prevention function | |
| CN108793867A (en) | A kind of polymer-modified mortar and preparation method for wall earthquake-proof energy-saving integration transformation | |
| CN108191357A (en) | A kind of enhancing C30 flyash-haydite concretes and preparation method thereof | |
| CN110054456A (en) | A kind of cement base surface material with high-temperature damage self-repair function | |
| JP5041521B2 (en) | High strength restoration material | |
| CN114213078A (en) | Wet spraying method cement micro-bead combined gel system sprayed concrete repairing and reinforcing material | |
| JP2012153577A (en) | Self-recovery concrete admixture, method for manufacturing the same and self-recovery concrete material using the admixture | |
| Yang | Source radon control of cement-based materials and application prospect of polymer delayed plugging strategy | |
| CN104987001A (en) | Preparation method for mortar of base layers of interior and exterior walls and decoration | |
| CN112456932A (en) | Preparation method of self-leveling mortar with good waterproof effect |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210305 |
|
| RJ01 | Rejection of invention patent application after publication |