CN110436842B - Cement mortar with electromagnetic shielding function and preparation method thereof - Google Patents
Cement mortar with electromagnetic shielding function and preparation method thereof Download PDFInfo
- Publication number
- CN110436842B CN110436842B CN201910789785.8A CN201910789785A CN110436842B CN 110436842 B CN110436842 B CN 110436842B CN 201910789785 A CN201910789785 A CN 201910789785A CN 110436842 B CN110436842 B CN 110436842B
- Authority
- CN
- China
- Prior art keywords
- parts
- electromagnetic shielding
- cement mortar
- graphene oxide
- shielding function
- 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.)
- Active
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
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00258—Electromagnetic wave absorbing or shielding 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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant 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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses cement mortar with an electromagnetic shielding function, which is characterized by being prepared from the following raw materials in parts by weight: 50-60 parts of cement, 30-50 parts of shale ash, 10-20 parts of boron slag, 30-50 parts of water, 3-5 parts of porous magnesium oxide fiber, 0.5-1.5 parts of sodium lauryl polyoxyethylene ether sulfate, 1-3 parts of allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer, 3-8 parts of graphene oxide fiber doped with metal ions and 1-3 parts of carbon nanotube fiber. The invention also discloses a preparation method of the cement mortar with the electromagnetic shielding function. The cement mortar with the electromagnetic shielding function disclosed by the invention has the advantages of obvious electromagnetic shielding effect, wide electromagnetic shielding wave band, excellent toughness, crack resistance, impermeability and corrosion resistance, and high compressive strength, and can meet the requirements of various building materials.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to cement mortar with an electromagnetic shielding function and a preparation method thereof.
Background
In recent years, with the rapid development of electronic communication technology, a large number of miniaturized and integrated electronic instruments and meters are introduced into homes, and the problem of electromagnetic radiation caused by the electronic instruments and meters is also receiving attention. On one hand, electromagnetic radiation can interfere with nearby electronic equipment to influence the normal operation of the electronic equipment, and the electromagnetic radiation can also leak information, so that instruments such as a computer have no information safety guarantee. On the other hand, the polypeptide is closely related to the increase of the incidence rate of various diseases such as malignant tumor, leukemia, degenerative nervous system diseases, cardiovascular diseases, reproductive system diseases and the like, and can directly act on DNA, protein and enzymes to cause ionization excitation chemical bond breakage so as to denature molecules and damage cell structures; it can also act on water molecules in the body to ionize and excite the water molecules to generate a large amount of free radicals with strong oxidizing property, so that histocytes are indirectly degenerated and necrotized to cause metabolic disorder of the body and cause a series of pathological changes such as regulatory dysfunction of immune, nervous and endocrine systems. Therefore, it is important to shield electromagnetic waves.
The construction of a functional layer with electromagnetic wave shielding or absorption on a building wall is a common method for shielding electromagnetic waves. However, in the prior art, the shielding material has poor shielding performance, low content and poor shielding effect on electromagnetic waves. In addition, the existing shielding structure is complex, the shielding wave band is generally limited to high frequency, and the intensity is low. The functional layers also have the defects of poor weather resistance and easy peeling, and have great limitation in the practical application process.
The Chinese patent with application publication number CN108947376A discloses cement mortar and a preparation method thereof, wherein the cement mortar is prepared from the following raw materials in parts by mass: 1-5 parts of graphene oxide, 1-10 parts of basalt fiber, 30-50 parts of water, 300 parts of sand 250-containing cement, 100 parts of cement and 1-5 parts of an additive. According to the invention, the shielding performance of cement mortar to electromagnetic radiation is effectively improved by coating basalt fibers with graphene, the mechanical property of the mortar is also effectively improved, and the compressive strength and the flexural strength are obviously improved. However, the water retention performance of the cement mortar is poor, the cement mortar applied to the surface of the base layer such as a building wall, a ceiling, a floor, a column and the like can be gradually dehydrated and dried along with the hydration and solidification of cement in the cement mortar, and the shrinkage increase of the cement mortar is easy to cause the phenomena of hollowing, cracking and falling off.
Therefore, the cement mortar with excellent comprehensive performance and the electromagnetic shielding function is developed to meet the market demand and has wide market value and application prospect.
Disclosure of Invention
The invention aims to solve the problems and provides the cement mortar with the electromagnetic shielding function, which has the advantages of obvious electromagnetic shielding effect, wide electromagnetic shielding wave band, excellent toughness, crack resistance, impermeability and corrosion resistance, high compressive strength and capability of meeting the requirements of various building materials. Meanwhile, the invention also discloses a preparation method of the cement mortar with the electromagnetic shielding function.
In order to achieve the purpose, the invention adopts the technical scheme that:
the cement mortar with the electromagnetic shielding function is characterized by being prepared from the following raw materials in parts by weight: 50-60 parts of cement, 30-50 parts of shale ash, 10-20 parts of boron slag, 30-50 parts of water, 3-5 parts of porous magnesium oxide fiber, 0.5-1.5 parts of sodium lauryl polyoxyethylene ether sulfate, 1-3 parts of allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer, 3-8 parts of graphene oxide fiber doped with metal ions and 1-3 parts of carbon nanotube fiber; wherein the metal-containing ions comprise aluminate ions, vanadate ions, yttrium ions and praseodymium ions in a mass ratio of 1:0.2:0.1: 0.1.
Further, the preparation method of the allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer comprises the following steps: adding allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside, ganoderic acid C, tributyl vinyl tin, vinyl trimethoxy silane and initiator into high boiling point solvent, stirring and reacting at 70-80 deg.C under nitrogen or inert gas atmosphere for 4-6 hr, removing solvent by rotary evaporation, and drying the obtained polymer at 80-90 deg.C in vacuum drying oven to constant weight.
Preferably, the mass ratio of the allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside, the ganoderic acid C, the tributyl vinyl tin, the vinyl trimethoxy silane, the initiator and the high boiling point solvent is 1:2:0.2 (0.2-0.4): 0.02-0.04): 9-14.
Preferably, the initiator is selected from at least one of diisopropyl peroxydicarbonate, tert-butyl peroxypivalate, azobisisobutyronitrile and azobisisoheptonitrile.
Preferably, the high boiling point solvent is selected from at least one of dimethyl sulfoxide, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone.
Preferably, the inert gas is selected from one of helium, neon and argon.
Further, the preparation method of the metal ion-containing doped graphene oxide fiber comprises the following steps:
step S1, dispersing graphene oxide fibers in an organic solvent, adding lauryl hydroxysultaine and an alkaline catalyst, stirring and reacting at 90-100 ℃ for 3-5 hours, filtering, taking filter residues, washing the filter residues with water for 3-5 times, and then placing the filter residues in a vacuum drying oven to be dried to constant weight to obtain zwitterionic salt modified graphene oxide;
and S2, dispersing the graphene oxide modified by the zwitter-ion salt prepared in the step S1 in water, adding calcium metaaluminate, sodium vanadate, yttrium sulfate and praseodymium nitrate into the water, stirring the mixture at the temperature of between 60 and 80 ℃ for reaction for 6 to 8 hours, centrifuging the mixture, washing the mixture for 3 to 5 times by using ethanol in a centrifuging way, and drying the washed mixture in a vacuum drying oven at the temperature of between 70 and 80 ℃ until the weight is constant.
Preferably, the mass ratio of the graphene oxide fibers, the organic solvent, the lauryl hydroxysultaine and the alkaline catalyst in the step S1 is (3-5): (10-15):0.5: (0.2-0.4).
Preferably, the organic solvent is selected from one of ethanol, dichloromethane, tetrahydrofuran and acetonitrile.
Preferably, the alkaline catalyst is selected from at least one of sodium hydroxide, sodium carbonate, potassium hydroxide and potassium carbonate.
Preferably, the quantity ratio of the zwitterion salt modified graphene oxide to the water to the calcium metaaluminate to the sodium vanadate to the yttrium sulfate to the praseodymium nitrate in the step S2 is 1 (4-8) to 0.1:0.02:0.01: 0.01.
Further, the preparation method of the cement mortar with the electromagnetic shielding function comprises the following steps: mixing cement, shale ash, boron slag, porous magnesium oxide fiber, sodium lauryl polyoxyethylene ether sulfate, allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer, graphene oxide fiber doped with metal ions and carbon nanotube fiber uniformly according to a proportion, adding water, stirring at 60-80 ℃ for 3-5 hours, and cooling to room temperature to obtain the composite material.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
(1) the cement mortar with the electromagnetic shielding function provided by the invention has the advantages of simple preparation process, convenience in operation, excellent product performance, high preparation efficiency and finished product qualification rate, no pollution to the environment, suitability for industrial production, economy and practicability.
(2) The cement mortar with the electromagnetic shielding function provided by the invention overcomes the technical problems that the water retention performance of the cement mortar in the prior art is poor, the cement mortar applied to the surfaces of base layers such as building walls, ceilings, floors and columns can be gradually dehydrated and dried along with the hydration and solidification of cement in the cement mortar, the shrinkage of the cement mortar is increased, and the phenomena of hollowing, cracking and falling are easily caused, and the cement mortar has no electromagnetic shielding function.
(3) According to the cement mortar with the electromagnetic shielding function, the shale ash and the boron slag which are two industrial solid wastes are added, so that the comprehensive performance of the cement mortar is improved; the cost is saved, the environmental protection recycling of solid wastes is realized, the basic national policy of energy conservation and emission reduction is met, and the ecological value, the social value and the economic value are higher.
(4) According to the cement mortar with the electromagnetic shielding function, the porous magnesium oxide fiber is added, so that the mechanical property of the cement mortar can be effectively improved, and the magnesium oxide also has an expansion effect and has the functions of water resistance, permeability resistance and crack resistance; the comprehensive performance of the cement mortar can be improved by adopting porous fibrous magnesium oxide; the addition of the graphene oxide fiber and the carbon nanotube fiber doped with metal ions can improve the electromagnetic shielding function of cement mortar while enhancing the mechanical property; and has a wider shielding wave band; the electromagnetic shielding performance is improved by doping metal ions; the components have synergistic effect, so that the cement mortar has excellent compressive strength, toughness, corrosion resistance and other properties, and can meet the requirements of various building materials; the addition of the allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer is favorable for further improving the electromagnetic shielding function due to the introduction of tin; the introduction of glucoside and trimethoxy silane structures can improve the compatibility among all components; the bonding strength is enhanced, when the mortar is used for repairing a concrete structure, the cement mortar can be well combined with the concrete, and the integrity of the concrete structure is improved.
Detailed Description
In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention more comprehensible, the present invention is further described with reference to the following examples. The examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.
The raw materials involved in the following examples of the present invention were all purchased commercially.
Example 1
The cement mortar with the electromagnetic shielding function is characterized by being prepared from the following raw materials in parts by weight: 50 parts of cement, 30 parts of shale ash, 10 parts of boron slag, 30 parts of water, 3 parts of porous magnesium oxide fiber, 0.5 part of sodium lauryl polyoxyethylene ether sulfate, 1 part of allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer, 3 parts of graphene oxide fiber doped with metal ions and 1 part of carbon nanotube fiber; wherein the metal-containing ions comprise aluminate ions, vanadate ions, yttrium ions and praseodymium ions in a mass ratio of 1:0.2:0.1: 0.1.
The preparation method of the allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer comprises the following steps: adding 10g of allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside, 10g of ganoderic acid C20g, 2g of tributyl vinyl tin, 2g of vinyl trimethoxy silane and 0.2g of diisopropyl peroxydicarbonate into 90g of dimethyl sulfoxide, stirring and reacting for 4 hours at 70 ℃ in a nitrogen atmosphere, then performing rotary evaporation to remove the solvent, and drying the obtained polymer in a vacuum drying oven at 80 ℃ to constant weight.
The preparation method of the metal ion-containing doped graphene oxide fiber comprises the following steps:
step S1, dispersing 300g of graphene oxide fibers in 1000g of ethanol, adding 50g of lauryl hydroxysultaine and 20g of sodium hydroxide, stirring and reacting at 90 ℃ for 3 hours, filtering, taking filter residues, washing the filter residues with water for 3 times, and then placing the filter residues in a vacuum drying oven to dry the filter residues to constant weight to obtain zwitterionic salt modified graphene oxide;
s2, dispersing the graphene oxide modified by the zwitter-ion salt prepared in the S1 into water, adding calcium metaaluminate, sodium vanadate, yttrium sulfate and praseodymium nitrate into the water, stirring the mixture at 60 ℃ for reacting for 6 hours, centrifuging the mixture, washing the mixture for 3 times by using ethanol in a centrifuging way, and drying the washed mixture in a vacuum drying oven at 70 ℃ to constant weight; the weight ratio of the amphoteric ion salt modified graphene oxide to water to calcium metaaluminate to sodium vanadate to yttrium sulfate to praseodymium nitrate is 1:4:0.1:0.02:0.01: 0.01.
The preparation method of the cement mortar with the electromagnetic shielding function comprises the following steps: uniformly mixing cement, shale ash, boron slag, porous magnesium oxide fiber, sodium lauryl polyoxyethylene ether sulfate, allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer, graphene oxide fiber doped with metal ions and carbon nano tube fiber in proportion, adding water, stirring for 3 hours at 60 ℃, and then cooling to room temperature to obtain the material.
Example 2
The cement mortar with the electromagnetic shielding function is characterized by being prepared from the following raw materials in parts by weight: 52 parts of cement, 35 parts of shale ash, 12 parts of boron slag, 35 parts of water, 3.5 parts of porous magnesium oxide fibers, 0.7 part of sodium laureth sulfate, 1.5 parts of allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer, 4 parts of graphene oxide fibers doped with metal ions and 1.5 parts of carbon nanotube fibers; wherein the metal-containing ions comprise aluminate ions, vanadate ions, yttrium ions and praseodymium ions in a mass ratio of 1:0.2:0.1: 0.1.
The preparation method of the allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer comprises the following steps: adding 10g of allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside, 20g of ganoderic acid C20g, 2g of tributylvinyltin, 2.5g of vinyltrimethoxysilane and 0.25g of tert-butyl peroxypivalate into 100g of N, N-dimethylformamide, stirring and reacting for 4.5 hours at 73 ℃ in a helium atmosphere, removing the solvent by rotary evaporation, and drying the obtained polymer in a vacuum drying oven at 83 ℃ to constant weight.
The preparation method of the metal ion-containing doped graphene oxide fiber comprises the following steps:
step S1, dispersing 350g of graphene oxide fibers in 1150g of dichloromethane, adding 50g of lauryl hydroxysultaine and 25g of sodium carbonate, stirring and reacting at 93 ℃ for 3.5 hours, filtering, taking filter residues, washing the filter residues with water for 4 times, and then placing the filter residues in a vacuum drying oven to dry to constant weight to obtain zwitterionic salt modified graphene oxide;
s2, dispersing the graphene oxide modified by the zwitter-ion salt prepared in the S1 into water, adding calcium metaaluminate, sodium vanadate, yttrium sulfate and praseodymium nitrate into the water, stirring the mixture at 65 ℃ for reacting for 6.5 hours, centrifuging the mixture, washing the mixture for 4 times by using ethanol in a centrifugal mode, and then drying the mixture in a vacuum drying oven at 72 ℃ to constant weight; the weight ratio of the amphoteric ion salt modified graphene oxide to water to calcium metaaluminate to sodium vanadate to yttrium sulfate to praseodymium nitrate is 1:5:0.1:0.02:0.01: 0.01.
The preparation method of the cement mortar with the electromagnetic shielding function comprises the following steps: uniformly mixing cement, shale ash, boron slag, porous magnesium oxide fiber, sodium lauryl polyoxyethylene ether sulfate, allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer, graphene oxide fiber doped with metal ions and carbon nano tube fiber according to a proportion, adding water, stirring at 65 ℃ for 3.5 hours, and cooling to room temperature to obtain the composite material.
Example 3
The cement mortar with the electromagnetic shielding function is characterized by being prepared from the following raw materials in parts by weight: 55 parts of cement, 40 parts of shale ash, 15 parts of boron slag, 40 parts of water, 4 parts of porous magnesium oxide fibers, 0.9 part of sodium laureth sulfate, 2 parts of allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer, 6 parts of graphene oxide fibers doped with metal ions and 2 parts of carbon nanotube fibers; wherein the metal-containing ions comprise aluminate ions, vanadate ions, yttrium ions and praseodymium ions in a mass ratio of 1:0.2:0.1: 0.1.
The preparation method of the allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer comprises the following steps: adding 10g of allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside, 20g of ganoderic acid C20g, 2g of tributylvinyltin, 3g of vinyltrimethoxysilane and 0.3g of azobisisobutyronitrile into 120g of N, N-dimethylacetamide, stirring and reacting for 5 hours at 75 ℃ under the atmosphere of neon, removing the solvent by rotary evaporation, and drying the obtained polymer in a vacuum drying oven at 85 ℃ to constant weight.
The preparation method of the metal ion-containing doped graphene oxide fiber comprises the following steps:
s1, dispersing 400g of graphene oxide fibers in 1300g of tetrahydrofuran, adding 50g of lauryl hydroxysultaine and 30g of potassium hydroxide, stirring and reacting at 95 ℃ for 4 hours, filtering, taking filter residues, washing the filter residues with water for 4 times, and then placing the filter residues in a vacuum drying oven to dry the filter residues to constant weight to obtain zwitterionic salt modified graphene oxide;
s2, dispersing the graphene oxide modified by the zwitter-ion salt prepared in the S1 into water, adding calcium metaaluminate, sodium vanadate, yttrium sulfate and praseodymium nitrate into the water, stirring the mixture at 70 ℃ for reaction for 7 hours, centrifuging the reaction product, washing the reaction product for 4 times by using ethanol in a centrifuging way, and drying the reaction product in a vacuum drying oven at 75 ℃ to constant weight; the weight ratio of the amphoteric ion salt modified graphene oxide to water to calcium metaaluminate to sodium vanadate to yttrium sulfate to praseodymium nitrate is 1:6:0.1:0.02:0.01: 0.01.
The preparation method of the cement mortar with the electromagnetic shielding function comprises the following steps: uniformly mixing cement, shale ash, boron slag, porous magnesium oxide fiber, sodium lauryl polyoxyethylene ether sulfate, allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer, graphene oxide fiber doped with metal ions and carbon nano tube fiber in proportion, adding water, stirring for 4 hours at 70 ℃, and then cooling to room temperature to obtain the composite material.
Example 4
The cement mortar with the electromagnetic shielding function is characterized by being prepared from the following raw materials in parts by weight: 58 parts of cement, 48 parts of shale ash, 18 parts of boron slag, 45 parts of water, 4.5 parts of porous magnesium oxide fibers, 1.3 parts of sodium laureth sulfate, 2.5 parts of allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer, 7 parts of graphene oxide fibers doped with metal ions and 2.5 parts of carbon nanotube fibers; wherein the metal-containing ions comprise aluminate ions, vanadate ions, yttrium ions and praseodymium ions in a mass ratio of 1:0.2:0.1: 0.1.
The preparation method of the allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer comprises the following steps: adding 10g of allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside, 10g of ganoderic acid C20g, 2g of tributyl vinyl tin, 3.9g of vinyl trimethoxy silane and 0.38g of initiator into 135g of high boiling point solvent, stirring and reacting for 5.8 hours at 78 ℃ under argon atmosphere, then removing the solvent by rotary evaporation, and then placing the obtained polymer in a vacuum drying oven for drying at 88 ℃ to constant weight; the initiator is a mixture formed by mixing diisopropyl peroxydicarbonate, tert-butyl peroxypivalate, azobisisobutyronitrile and azobisisoheptonitrile according to a mass ratio of 1:2:1: 3; the high boiling point solvent is a mixture formed by mixing dimethyl sulfoxide, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone according to a mass ratio of 1:3:5: 2.
The preparation method of the metal ion-containing doped graphene oxide fiber comprises the following steps:
s1, dispersing 480g of graphene oxide fibers in 1450g of acetonitrile, adding 50g of lauryl hydroxysultaine and 38g of an alkaline catalyst, stirring and reacting at 98 ℃ for 4.8 hours, filtering, taking filter residues, washing the filter residues with water for 5 times, and then placing the filter residues in a vacuum drying oven to dry the filter residues to constant weight to obtain zwitterionic salt modified graphene oxide; the alkaline catalyst is prepared by mixing sodium hydroxide, sodium carbonate, potassium hydroxide and potassium carbonate according to the mass ratio of 1:1:3: 2;
s2, dispersing the graphene oxide modified by the zwitter-ion salt prepared in the S1 into water, adding calcium metaaluminate, sodium vanadate, yttrium sulfate and praseodymium nitrate into the water, stirring the mixture at 78 ℃ for reaction for 7.8 hours, centrifuging the reaction product, washing the reaction product for 5 times by using ethanol in a centrifugal mode, and drying the reaction product in a vacuum drying oven at 78 ℃ to reach a constant weight; the weight ratio of the amphoteric ion salt modified graphene oxide to water to calcium metaaluminate to sodium vanadate to yttrium sulfate to praseodymium nitrate is 1:7:0.1:0.02:0.01: 0.01.
The preparation method of the cement mortar with the electromagnetic shielding function comprises the following steps: uniformly mixing cement, shale ash, boron slag, porous magnesium oxide fiber, sodium lauryl polyoxyethylene ether sulfate, allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer, graphene oxide fiber doped with metal ions and carbon nano tube fiber according to a proportion, adding water, stirring at 78 ℃ for 4.5 hours, and cooling to room temperature to obtain the composite material.
Example 5
The cement mortar with the electromagnetic shielding function is characterized by being prepared from the following raw materials in parts by weight: 60 parts of cement, 50 parts of shale ash, 20 parts of boron slag, 50 parts of water, 5 parts of porous magnesium oxide fibers, 1.5 parts of sodium laureth sulfate, 3 parts of allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer, 8 parts of graphene oxide fibers doped with metal ions and 3 parts of carbon nanotube fibers; wherein the metal-containing ions comprise aluminate ions, vanadate ions, yttrium ions and praseodymium ions in a mass ratio of 1:0.2:0.1: 0.1.
The preparation method of the allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer comprises the following steps: adding 10g of allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside, 10g of ganoderic acid C20g, 2g of tributyl vinyl tin, 4g of vinyl trimethoxy silane and 0.4g of azodiisoheptonitrile into 140g of N-methyl pyrrolidone, stirring and reacting for 6 hours at 80 ℃ in a nitrogen atmosphere, removing the solvent by rotary evaporation, and drying the obtained polymer in a vacuum drying oven at 90 ℃ to constant weight.
The preparation method of the metal ion-containing doped graphene oxide fiber comprises the following steps:
step S1, dispersing 500g of graphene oxide fibers in 1500g of ethanol, adding 50g of lauryl hydroxysultaine and 40g of sodium hydroxide, stirring and reacting at 100 ℃ for 5 hours, filtering, taking filter residues, washing the filter residues with water for 5 times, and then placing the filter residues in a vacuum drying oven to dry the filter residues to constant weight to obtain zwitterionic salt modified graphene oxide;
s2, dispersing the graphene oxide modified by the zwitter-ion salt prepared in the S1 into water, adding calcium metaaluminate, sodium vanadate, yttrium sulfate and praseodymium nitrate into the water, stirring the mixture at 80 ℃ for reacting for 8 hours, centrifuging the mixture, washing the mixture for 5 times by using ethanol in a centrifugal mode, and then drying the mixture in a vacuum drying oven at 80 ℃ to reach constant weight; the weight ratio of the amphoteric ion salt modified graphene oxide to water to calcium metaaluminate to sodium vanadate to yttrium sulfate to praseodymium nitrate is 1:8:0.1:0.02:0.01: 0.01.
The preparation method of the cement mortar with the electromagnetic shielding function comprises the following steps: uniformly mixing cement, shale ash, boron slag, porous magnesium oxide fiber, sodium lauryl polyoxyethylene ether sulfate, allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer, graphene oxide fiber doped with metal ions and carbon nano tube fiber in proportion, adding water, stirring for 5 hours at 80 ℃, and then cooling to room temperature to obtain the composite material.
Comparative example 1
The cement mortar with the electromagnetic shielding function is provided in the example, the preparation method and the formula are basically the same as those of the example 1, except that boron slag is not added.
Comparative example 2
This example provides a cement mortar having an electromagnetic shielding function, which was prepared in substantially the same manner and formulation as in example 1, except that magnesium oxide was used instead of the porous magnesium oxide fiber.
Comparative example 3
This example provides a cement mortar with electromagnetic shielding function, which is prepared by the same method and formulation as example 1, except that sodium laureth sulfate is not added.
Comparative example 4
This example provides a cement mortar having an electromagnetic shielding function, which was prepared in substantially the same manner and formulation as in example 1, except that the allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/Ganodenic acid C/tributylvinyltin/vinyltrimethoxysilane copolymer was not added.
Comparative example 5
The present example provides a cement mortar with electromagnetic shielding function, whose preparation method and formulation are substantially the same as those of example 1, except that no metal ion-doped graphene oxide fiber is added.
Comparative example 6
The present example provides a cement mortar with electromagnetic shielding function, whose preparation method and formulation are substantially the same as those of example 1, except that no carbon nanotube fiber is added.
Comparative example 7
This example provides a cement mortar with electromagnetic shielding function, which is prepared in substantially the same manner and formulation as in example 1, except that sodium vanadate is not added.
Comparative example 8
The present example provides a cement mortar with electromagnetic shielding function, whose preparation method and formulation are substantially the same as those of example 1, except that praseodymium nitrate is not added.
Comparative example 9
This example provides a cement mortar, which is prepared by the same method and formulation as in example 1 of the chinese patent application No. 201810936805.5.
In order to illustrate the technical effects of the examples of the present invention, the cement mortars obtained in the above examples 1 to 5 and comparative examples 1 to 9 were tested, and the test methods and test results are shown in Table 1.
TABLE 1
As can be seen from table 1, the cement mortar with the electromagnetic shielding function disclosed in the embodiments of the present invention has higher compressive strength and tensile strength, better electromagnetic shielding effect, and better impermeability, which are the result of the synergistic effect of the components, compared to the existing products.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The cement mortar with the electromagnetic shielding function is characterized by being prepared from the following raw materials in parts by weight: 50-60 parts of cement, 30-50 parts of shale ash, 10-20 parts of boron slag, 30-50 parts of water, 3-5 parts of porous magnesium oxide fiber, 0.5-1.5 parts of sodium lauryl polyoxyethylene ether sulfate, 1-3 parts of allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer, 3-8 parts of graphene oxide fiber doped with metal ions and 1-3 parts of carbon nanotube fiber;
the preparation method of the allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer comprises the following steps: adding allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside, ganoderic acid C, tributyl vinyl tin, vinyl trimethoxy silane and initiator into high boiling point solvent, stirring and reacting at 70-80 deg.C under nitrogen or inert gas atmosphere for 4-6 hr, removing solvent by rotary evaporation, and drying the obtained polymer at 80-90 deg.C in vacuum drying oven to constant weight; the mass ratio of the allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside, the ganoderic acid C, the tributyl vinyl tin, the vinyl trimethoxy silane, the initiator and the high boiling point solvent is 1:2:0.2 (0.2-0.4): 0.02-0.04): 9-14;
the preparation method of the metal ion-containing doped graphene oxide fiber comprises the following steps:
step S1, dispersing graphene oxide fibers in an organic solvent, adding lauryl hydroxysultaine and an alkaline catalyst, stirring and reacting at 90-100 ℃ for 3-5 hours, filtering, taking filter residues, washing the filter residues with water for 3-5 times, and then placing the filter residues in a vacuum drying oven to be dried to constant weight to obtain zwitterionic salt modified graphene oxide; the mass ratio of the graphene oxide fibers to the organic solvent to the lauryl hydroxysultaine to the alkaline catalyst is (3-5) to (10-15) to 0.5 to (0.2-0.4);
s2, dispersing the graphene oxide modified by the zwitter-ion salt prepared in the S1 into water, adding calcium metaaluminate, sodium vanadate, yttrium sulfate and praseodymium nitrate into the water, stirring the mixture at the temperature of between 60 and 80 ℃ for reaction for 6 to 8 hours, centrifuging the mixture, washing the mixture for 3 to 5 times by using ethanol in a centrifuging way, and then drying the mixture in a vacuum drying oven at the temperature of between 70 and 80 ℃ to constant weight; the weight ratio of the amphoteric ion salt modified graphene oxide to water to calcium metaaluminate to sodium vanadate to yttrium sulfate to praseodymium nitrate is 1 (4-8) to 0.1:0.02:0.01: 0.01.
2. The cement mortar with electromagnetic shielding function of claim 1, wherein the initiator is at least one selected from the group consisting of diisopropyl peroxydicarbonate, tert-butyl peroxypivalate, azobisisobutyronitrile, and azobisisoheptonitrile; the high boiling point solvent is at least one selected from dimethyl sulfoxide, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone; the inert gas is selected from helium, neon and argon.
3. The cement mortar with electromagnetic shielding function of claim 1, wherein the organic solvent is selected from one of ethanol, dichloromethane, tetrahydrofuran, acetonitrile; the alkaline catalyst is at least one of sodium hydroxide, sodium carbonate, potassium hydroxide and potassium carbonate.
4. The cement mortar with electromagnetic shielding function according to any one of claims 1 to 3, wherein the preparation method of the cement mortar with electromagnetic shielding function comprises the following steps: mixing cement, shale ash, boron slag, porous magnesium oxide fiber, sodium lauryl polyoxyethylene ether sulfate, allyl-2-acetamido-2-deoxy-BETA-D-glucopyranoside/ganoderic acid C/tributyl vinyl tin/vinyl trimethoxy silane copolymer, graphene oxide fiber doped with metal ions and carbon nanotube fiber uniformly according to a proportion, adding water, stirring at 60-80 ℃ for 3-5 hours, and cooling to room temperature to obtain the composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910789785.8A CN110436842B (en) | 2019-08-26 | 2019-08-26 | Cement mortar with electromagnetic shielding function and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910789785.8A CN110436842B (en) | 2019-08-26 | 2019-08-26 | Cement mortar with electromagnetic shielding function and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110436842A CN110436842A (en) | 2019-11-12 |
| CN110436842B true CN110436842B (en) | 2021-11-09 |
Family
ID=68437601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910789785.8A Active CN110436842B (en) | 2019-08-26 | 2019-08-26 | Cement mortar with electromagnetic shielding function and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110436842B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112194435A (en) * | 2020-10-13 | 2021-01-08 | 盐城工学院 | High-temperature-resistant cement-based composite material and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0776153B1 (en) * | 1995-11-24 | 1998-08-26 | Gebr. Knauf Westdeutsche Gipswerke KG | Method for electromagnetic shielding of enclosures |
| CN1721357A (en) * | 2004-07-12 | 2006-01-18 | 西南科技大学 | Cement based composite materials with electromagnetic screen function |
| CN108484217A (en) * | 2018-04-24 | 2018-09-04 | 上海市地江建筑科技有限公司 | Cement foam foaming agent and preparation method thereof |
| CN108558328A (en) * | 2018-04-04 | 2018-09-21 | 北京工业大学 | A kind of Electromagnetically shielding cement based composites and preparation method thereof |
| CN108947376A (en) * | 2018-08-16 | 2018-12-07 | 北京天维宝辰化学产品有限公司 | A kind of cement mortar and preparation method thereof |
-
2019
- 2019-08-26 CN CN201910789785.8A patent/CN110436842B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0776153B1 (en) * | 1995-11-24 | 1998-08-26 | Gebr. Knauf Westdeutsche Gipswerke KG | Method for electromagnetic shielding of enclosures |
| CN1721357A (en) * | 2004-07-12 | 2006-01-18 | 西南科技大学 | Cement based composite materials with electromagnetic screen function |
| CN108558328A (en) * | 2018-04-04 | 2018-09-21 | 北京工业大学 | A kind of Electromagnetically shielding cement based composites and preparation method thereof |
| CN108484217A (en) * | 2018-04-24 | 2018-09-04 | 上海市地江建筑科技有限公司 | Cement foam foaming agent and preparation method thereof |
| CN108947376A (en) * | 2018-08-16 | 2018-12-07 | 北京天维宝辰化学产品有限公司 | A kind of cement mortar and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110436842A (en) | 2019-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105294142A (en) | Red-mud-based sintered light aggregate and preparation method thereof | |
| CN107352928A (en) | Red-mud coal ash high-strength heat preservation building block based on alkali-activated carbonatite and preparation method thereof | |
| CN110436842B (en) | Cement mortar with electromagnetic shielding function and preparation method thereof | |
| CN110818364A (en) | Light high-strength waterproof concrete and preparation method thereof | |
| Al-Saadi et al. | Synthesis of intumescent materials by alkali activation of glass waste using intercalated graphite additions | |
| CN105314956A (en) | Geopolymer large-size concrete and preparation method thereof | |
| CN111817021B (en) | Method for preparing composite microwave absorbing material by using coal gasification furnace slag | |
| CN111848058A (en) | Building energy-saving heat-insulating material and preparation method thereof | |
| CN109912246B (en) | Method for preparing early strength concrete by exciting coal-to-liquid furnace slag with N, N-dimethyl formamide | |
| CN102250296B (en) | Water reducing agent as well as preparation method and application thereof | |
| CN102731033A (en) | Waste artificial turf fiber toughened and reinforced cement base material and preparation method thereof | |
| CN108164240A (en) | A kind of electromagnetic wave absorption environmental protection mortar | |
| CN113526934B (en) | 3D printing graphene oxide reinforced cement-based material and preparation method thereof | |
| CN104987016A (en) | Neutral sodium-salt alkali slag tunnel fireproof coating, and preparation and using method thereof | |
| Li et al. | Pretreated lightweight aggregates for self-healing concrete exposed to calcium hydroxide-rich sewage | |
| CN113998933A (en) | Calcium silicate board and preparation method thereof | |
| CN110092621A (en) | A kind of steel slag permeable foam concrete and preparation method thereof | |
| CN111440473A (en) | Light environment-friendly exterior wall leveling putty and preparation method thereof | |
| CN110054454A (en) | A kind of aqueous tyre talc polymer cement-based waterproof slurry and preparation method thereof | |
| CN115583826A (en) | Reinforced concrete anticorrosive paint, preparation method and application | |
| CN113372071A (en) | Cement-based waterproof anti-cracking coating with high impermeability function and preparation method thereof | |
| CN1384153A (en) | Fireproof paint for steel structure of housing | |
| CN103073924A (en) | Boron nitride comprising phosphonitrile structure and preparation method thereof | |
| CN112624688A (en) | Low-wetting and high-durability composite portland cement and preparation method thereof | |
| CN104119052B (en) | A kind of utilize dealkalize red mud and red mud iron selection tailings to prepare inorganic clad plate and preparation method |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20211025 Address after: 314000 east side of NaNTU, Donggang Siqiao, Lianfeng village, Yanguan Town, Haining City, Jiaxing City, Zhejiang Province Applicant after: Zhejiang Chaoxiang Science and Technology Co.,Ltd. Address before: 417100 Huangmao formation, Tianxin village, Baima Town, Lianyuan City, Loudi City, Hunan Province Applicant before: Liang Jian |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |