CN117125705A - Method for stripping graphene by mass-momentum-difference collision stripping method - Google Patents
Method for stripping graphene by mass-momentum-difference collision stripping method Download PDFInfo
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- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 3
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/184—Preparation
- C01B32/19—Preparation by exfoliation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/022—Carbon
- C04B14/024—Graphite
-
- 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
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5001—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with carbon or carbonisable 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/65—Coating or impregnation with inorganic materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/34—Filling pastes
-
- 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
- C04B2111/29—Frost-thaw resistance
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
Abstract
The invention relates to the technical field of graphene, in particular to a method for stripping graphene by a mass-momentum-difference collision stripping method, which comprises the following steps of: s1, putting flake graphite powder into water, and pouring a certain amount of iron powder into the liquid; s2, vertically placing a stirring rod of a disperser into water in a stirring tank, wherein stirring blades are required to be positioned at a position from top to bottom 2/3 of the longitudinal direction of the liquid; and S3, starting a disperser, adjusting the rotating speed, taking crystalline flake graphite powder which does not float on the surface of a vortex as a main material, and adopting a preparation process of the graphene liquid-phase strong magnetic target centrifugal impact stripping method, so that the industrial production cost for preparing the graphene can be greatly reduced, and the application cost of the disperser is more adaptable especially in the application of directly using the graphene in a dispersing state, and is convenient for the application fields of directly using graphene dispersion liquid to spray, mix and the like.
Description
Technical Field
The invention relates to the technical field of graphene, in particular to a method for stripping graphene by a mass-momentum-difference collision stripping method.
Background
Graphene is a two-dimensional material, has unique physical properties in the fields of thermal, mechanical, optical, electronic application and the like, and is a subject worthy of high attention in the field of new materials. In fact, graphene exists in nature, and only a single-layer structure is difficult to peel off. Graphene layers are stacked to form graphite, and 1 mm thick graphite comprises about 300 ten thousand graphene layers. Peeling graphene from graphite is a process of forming a two-dimensional interatomic film structure by breaking the three-dimensional acting force between graphite molecules by external force.
However, the method of the prior art capable of realizing industrial production is mainly realized by CVD (chemical vapor deposition), and a large-area, continuous, transparent and high-conductivity few-layer graphene film can be manufactured by the chemical vapor deposition, and is mainly used for the anode of a photovoltaic device, and the energy conversion efficiency is as high as 1.71%; compared with the element made of the indium tin oxide material, the energy conversion efficiency of the element is about 55.2%, the energy conversion efficiency is about 55.2%, the production difficulty is high, the production cost is high, the graphene application is difficult to popularize, the process for producing the graphene by a low-cost physical method is researched, the revolutionary significance is achieved, and in this regard, a method for stripping the graphene by a mass-momentum difference collision stripping method is provided.
Disclosure of Invention
The invention aims to provide a method for stripping graphene by a mass-momentum-difference collision stripping method, which aims to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a method for stripping graphene by a mass-differential collision stripping method, which comprises the following steps:
s1, putting flake graphite powder into water, and pouring a certain amount of iron powder into the liquid;
s2, vertically placing a stirring rod of a disperser into water in a stirring tank, wherein stirring blades are required to be positioned at a position from top to bottom 2/3 of the longitudinal direction of the liquid;
s3, starting a disperser, and adjusting the rotating speed, wherein the rotating speed is required by the crystalline flake graphite powder which does not float on the surface of the vortex;
s4, maintaining a stirring state, namely attaching a rubidium magnet block to a designated position on the outer wall of the stirring tank, wherein the rubidium magnet block adsorbs iron powder particles in the liquid into clusters through the wall of the stirring tank, forming clustered collision targets on the wall of the stirring tank, wherein the positions and the number of the clustered targets influence the collision effect, and the adjustment is needed;
s5, adjusting a disperser, increasing the stirring rotation speed, and enabling flake graphite particles in the stirring tank to generate high-speed centrifugal motion under the pushing of high-speed rotating liquid and generate high-speed collision with iron powder cluster particles on a strong magnetic target;
s6, stirring at a high speed for every half hour, and allowing the rubidium magnet attached to the outside of the tank body to leave the tank body, so as to allow part of graphite particles stirred into the iron powder clusters to diffuse back into the liquid to participate in collision;
step S7, continuously stirring and colliding for about 48 hours at a high speed, wherein most of graphite particles in the liquid are impacted into dispersed graphene films, and the liquid is changed from turbid to almost transparent;
and S8, stopping stirring, separating the stirrer from the tank body, keeping the rubidium magnet at the original position, slowly pouring out the liquid in the tank, and thus finishing preparation.
Preferably, in the step S1, the weight ratio of the crystalline flake graphite powder to the deionized water is 5:10000.
Preferably, in the step S5, the rotation speed of the disperser is increased to 5000/min.
Preferably, the method also comprises the application of cement mortar coagulation:
according to the following steps of 1:8 or 1:10, diluting the carbon film slurry, mixing cement mortar or cement gravel concrete, and empirically adjusting the liquid amount according to the use scene;
the water-retaining property of the concrete can be improved by using the 'carbon film slurry' diluent, maintenance is not needed basically after pouring, the cracking resistance and freezing resistance of the concrete can be greatly improved, the concrete can be used for construction at the environmental temperature of 5 ℃ to minus 3 ℃, and the compression resistance of the concrete can be improved.
Preferably, the method further comprises the application of cement mortar fine dried noodle slurry:
diluting the carbon film slurry according to the ratio of 1:5 or 1:8, adding 5 per mill of polyvinyl alcohol rubber powder and a certain amount of foaming agent, stirring by a stirrer until the rubber powder is completely dissolved to form carbon film mixed glue solution, mixing the glue solution with cement mortar, and stirring the cement mortar sufficiently and rapidly by using the stirrer to enable a large amount of bubbles to appear in the cement mortar, wherein the viscosity is adjusted empirically according to the use situation;
the carbon film mixed glue solution and the mixed fine dried noodle cement mortar are used, so that the adhesive force of fine dried noodle slurry can be effectively improved, the cracking resistance and freezing resistance effects are obviously improved, the cement and sediment materials can be saved by about 15% under the condition of the same construction area and thickness, namely, the weight can be reduced by about 15% under the condition of the same volume, the cracking resistance and freezing resistance effects of the concrete fine dried noodles can be greatly improved, the concrete fine dried noodles can be constructed and used at the environmental temperature of 5 ℃ to minus 3 ℃, the sagging deformation of the concrete fine dried noodles can be prevented, and the sound insulation performance of a surface layer can be improved.
Preferably, the method further comprises the application of wall putty paste:
according to the following steps of 1:5, diluting the carbon film slurry, stirring putty powder, and empirically adjusting the liquid injection amount according to the use scene;
the use of the diluent of the carbon film slurry can greatly improve the cracking resistance and freezing resistance of the putty, and can be used for construction at the environmental temperature of 5 ℃ to-3 ℃.
Preferably, the use of the "plant sand" particles is also included:
before preparing the plant sand on a particle extruder, carrying out powder mixing by using carbon film stock solution, and adjusting the liquid adding amount according to extrusion discharge of equipment and particle forming performance;
the carbon film stock solution is used for preparing plant sand powder for granulation and carrying out granule spray coating, so that the bearing pressure of the formed granules can be improved, the dosage of other auxiliary materials can be reduced, the use effect is improved, and the cost is reduced.
Preferably, the method also comprises the application of preparing a carbon film crystal oscillator heat insulation coating:
adding polyvinyl alcohol powder into a basic solution of carbon film stock solution according to the weight ratio of 0.5-0.8%, stirring by a high-speed stirrer until the polyvinyl alcohol powder is completely dissolved, adding polyacrylamide powder of 0.01-0.02%, stirring by the high-speed stirrer until the polyacrylamide powder is completely dissolved, adding a plurality of quartz and mica mixed powder in the weight ratio of 1:1 into the mixed stock solution, stirring uniformly by a stirrer, wherein the adding amount of the quartz and mica mixed powder is empirically adjusted according to actual use scenes (such as spraying or smearing), and fully stirring to prevent uneven precipitation concentration before use;
the carbon film stock solution is a core base material for preparing a carbon film crystal oscillator heat insulation coating, and plays a key role in forming heat reflection by inducing a silicon crystal oscillator by the carbon film crystal oscillator in the coating;
the carbon film crystal vibration heat insulation coating can be directly brushed or sprayed on the surfaces of different materials through laboratory operation, and the coated surface is a heating surface; the heat insulation effect can be used for checking related test record data;
the carbon film crystal vibration heat-insulating coating can be directly smeared on the surface of the outer wall of a building, is completely flame-retardant, is not influenced by rain wash, does not need to additionally arrange other attachment pieces, and does not influence the heat-insulating effect on the wall body when the outer wall paint is attached on the surface of the film crystal vibration heat-insulating coating.
Preferably, the application of 'cement sand concrete impermeability' is also included:
the carbon film stock solution is used according to the following ratio of 1: 0.2%o: 2% adding two kinds of powder of polyacrylamide and polyvinyl alcohol in a weight ratio, stirring by a stirrer until the powder is completely dissolved, adding 1%o of defoaming agent to form 'carbon-based vinyl film slurry', uniformly coating the slurry on a concrete impermeable surface, and coating the slurry once again after the slurry is dried and fixed;
diluting the carbon film stock solution with clear water in a ratio of 5:1, and then mixing the raw solution with the clear water according to the ratio of 1: 0.2%o: 2% adding two kinds of powder of polyacrylamide and polyvinyl alcohol into the diluent in a weight ratio, stirring by using a stirrer until the powder is completely dissolved, adding 1 per mill of defoamer to form 'carbon-based vinyl membrane diluted slurry', mixing cement mortar with the diluted slurry, and empirically adjusting the dosage of the diluted slurry according to the use scene of the cement mortar;
the use of the carbon-based vinyl film slurry can effectively improve the impermeability of cement sand concrete.
Compared with the prior art, the invention has the beneficial effects that:
firstly, placing metal iron powder into container water, stirring at high speed, placing a rubidium magnet on the outer wall of the container, and accumulating the stirred metal iron powder in the container wall to form a clustered target under the adsorption action of the rubidium magnet;
according to the method for stripping graphene by using the mass-momentum-difference collision stripping method, graphite powder is placed into container water, and graphite particles are repeatedly and strongly collided with metal iron powder particles on a strong magnetic target formed on the inner wall of the container in high-speed stirring of liquid, so that the graphite particle structure is cracked and stripped to form a dispersed graphene fragment structure;
compared with other graphene stripping methods in the prior art, the method for stripping the graphene by the mass-momentum-difference collision stripping method has the advantages that the preparation process of the graphene by the liquid-phase strong magnetic target centrifugal collision stripping method is simple and feasible, the industrial production cost for preparing the graphene can be greatly reduced, and particularly, in the application of directly using the graphene in a dispersion state, the application cost is more adaptable, and the method is convenient for application fields such as spraying and mixing of directly using graphene dispersion liquid.
Drawings
FIG. 1 is a schematic diagram of a mass-differential impact exfoliation method of the present invention;
FIG. 2 is a schematic flow chart of the method of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1-2, the present invention provides a technical solution:
a method for stripping graphene by a mass-differential collision stripping method, which comprises the following steps:
s1, putting flake graphite powder into water, and pouring a certain amount of iron powder into the liquid;
s2, vertically placing a stirring rod of a disperser into water in a stirring tank, wherein stirring blades are required to be positioned at a position from top to bottom 2/3 of the longitudinal direction of the liquid;
s3, starting a disperser, and adjusting the rotating speed, wherein the rotating speed is required by the crystalline flake graphite powder which does not float on the surface of the vortex;
s4, maintaining a stirring state, namely attaching a rubidium magnet block to a designated position on the outer wall of the stirring tank, wherein the rubidium magnet block adsorbs iron powder particles in the liquid into clusters through the wall of the stirring tank, forming clustered collision targets on the wall of the stirring tank, wherein the positions and the number of the clustered targets influence the collision effect, and the adjustment is needed;
s5, adjusting a disperser, increasing the stirring rotation speed, and enabling flake graphite particles in the stirring tank to generate high-speed centrifugal motion under the pushing of high-speed rotating liquid and generate high-speed collision with iron powder cluster particles on a strong magnetic target;
s6, stirring at a high speed for every half hour, and allowing the rubidium magnet attached to the outside of the tank body to leave the tank body, so as to allow part of graphite particles stirred into the iron powder clusters to diffuse back into the liquid to participate in collision;
step S7, continuously stirring and colliding for about 48 hours at a high speed, wherein most of graphite particles in the liquid are impacted into dispersed graphene films, and the liquid is changed from turbid to almost transparent;
and S8, stopping stirring, separating the stirrer from the tank body, keeping the rubidium magnet at the original position, slowly pouring out the liquid in the tank, and thus finishing preparation.
In the embodiment, the weight ratio of the crystalline flake graphite powder to the deionized water in the step S1 is 5:10000.
In this embodiment, the rotational speed of the disperser in step S5 is increased to 5000/min.
In this embodiment, the application of cement mortar coagulation:
according to the following steps of 1:8 or 1:10, diluting the carbon film slurry, mixing cement mortar or cement gravel concrete, and empirically adjusting the liquid amount according to the use scene;
the water-retaining property of the concrete can be improved by using the 'carbon film slurry' diluent, maintenance is not needed basically after pouring, the cracking resistance and freezing resistance of the concrete can be greatly improved, the concrete can be used for construction at the environmental temperature of 5 ℃ to minus 3 ℃, and the compression resistance of the concrete can be improved.
In this embodiment, the application of the cement mortar fine dried noodle slurry:
diluting the carbon film slurry according to the ratio of 1:5 or 1:8, adding 5 per mill of polyvinyl alcohol rubber powder and a certain amount of foaming agent, stirring by a stirrer until the rubber powder is completely dissolved to form carbon film mixed glue solution, mixing the glue solution with cement mortar, and stirring the cement mortar sufficiently and rapidly by using the stirrer to enable a large amount of bubbles to appear in the cement mortar, wherein the viscosity is adjusted empirically according to the use situation;
the carbon film mixed glue solution and the mixed fine dried noodle cement mortar are used, so that the adhesive force of fine dried noodle slurry can be effectively improved, the cracking resistance and freezing resistance effects are obviously improved, the cement and sediment materials can be saved by about 15% under the condition of the same construction area and thickness, namely, the weight can be reduced by about 15% under the condition of the same volume, the cracking resistance and freezing resistance effects of the concrete fine dried noodles can be greatly improved, the concrete fine dried noodles can be constructed and used at the environmental temperature of 5 ℃ to minus 3 ℃, the sagging deformation of the concrete fine dried noodles can be prevented, and the sound insulation performance of a surface layer can be improved.
In this embodiment, the application of the wall putty paste:
according to the following steps of 1:5, diluting the carbon film slurry, stirring putty powder, and empirically adjusting the liquid injection amount according to the use scene;
the use of the diluent of the carbon film slurry can greatly improve the cracking resistance and freezing resistance of the putty, and can be used for construction at the environmental temperature of 5 ℃ to-3 ℃.
In this example, the use of "plant sand" particles was prepared:
before preparing the plant sand on a particle extruder, carrying out powder mixing by using carbon film stock solution, and adjusting the liquid adding amount according to extrusion discharge of equipment and particle forming performance;
the carbon film stock solution is used for preparing plant sand powder for granulation and carrying out granule spray coating, so that the bearing pressure of the formed granules can be improved, the dosage of other auxiliary materials can be reduced, the use effect is improved, and the cost is reduced.
In this example, the application of the carbon film crystal oscillator heat insulation coating is prepared:
adding polyvinyl alcohol powder into a basic solution of carbon film stock solution according to the weight ratio of 0.5-0.8%, stirring by a high-speed stirrer until the polyvinyl alcohol powder is completely dissolved, adding polyacrylamide powder of 0.01-0.02%, stirring by the high-speed stirrer until the polyacrylamide powder is completely dissolved, adding a plurality of quartz and mica mixed powder in the weight ratio of 1:1 into the mixed stock solution, stirring uniformly by a stirrer, wherein the adding amount of the quartz and mica mixed powder is empirically adjusted according to actual use scenes (such as spraying or smearing), and fully stirring to prevent uneven precipitation concentration before use;
the carbon film stock solution is a core base material for preparing a carbon film crystal oscillator heat insulation coating, and plays a key role in forming heat reflection by inducing a silicon crystal oscillator by the carbon film crystal oscillator in the coating;
the carbon film crystal vibration heat insulation coating can be directly brushed or sprayed on the surfaces of different materials through laboratory operation, and the coated surface is a heating surface; the heat insulation effect can be used for checking related test record data;
the carbon film crystal vibration heat-insulating coating can be directly smeared on the surface of the outer wall of a building, is completely flame-retardant, is not influenced by rain wash, does not need to additionally arrange other attachment pieces, and does not influence the heat-insulating effect on the wall body when the outer wall paint is attached on the surface of the film crystal vibration heat-insulating coating.
In this example, the application of "cement-sand concrete impervious" is:
the carbon film stock solution is used according to the following ratio of 1: 0.2%o: 2% adding two kinds of powder of polyacrylamide and polyvinyl alcohol in a weight ratio, stirring by a stirrer until the powder is completely dissolved, adding 1%o of defoaming agent to form 'carbon-based vinyl film slurry', uniformly coating the slurry on a concrete impermeable surface, and coating the slurry once again after the slurry is dried and fixed;
diluting the carbon film stock solution with clear water in a ratio of 5:1, and then mixing the raw solution with the clear water according to the ratio of 1: 0.2%o: 2% adding two kinds of powder of polyacrylamide and polyvinyl alcohol into the diluent in a weight ratio, stirring by using a stirrer until the powder is completely dissolved, adding 1 per mill of defoamer to form 'carbon-based vinyl membrane diluted slurry', mixing cement mortar with the diluted slurry, and empirically adjusting the dosage of the diluted slurry according to the use scene of the cement mortar;
the use of the carbon-based vinyl film slurry can effectively improve the impermeability of cement sand concrete.
When the method for stripping graphene by the mass difference collision stripping method is used, firstly, metal iron powder is placed into container water, and a rubidium magnet is placed on the outer wall of the container while stirring at a high speed, and the stirred metal iron powder is gathered in the container wall to form a clustered target under the adsorption of the rubidium magnet; then placing graphite powder into container water, and repeatedly and strongly colliding graphite particles with metal iron powder particles on a strong magnetic target formed on the inner wall of the container in high-speed stirring of liquid, so that the graphite particle structure is broken and peeled off to form a dispersed graphene fragment structure; compared with other graphene stripping methods, the preparation process of the graphene 'liquid-phase strong magnetic target centrifugal impact stripping method' is simple and feasible, can greatly reduce the industrial production cost of preparing graphene, and particularly has more adaptable application cost in the application of directly using the graphene in a dispersion state, and is convenient for the application fields of spraying, mixing and the like of directly using the graphene dispersion liquid.
The foregoing has shown and described the basic principles, principal 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 above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The method for stripping graphene by using the mass-difference collision stripping method is characterized by comprising the following steps of:
s1, putting flake graphite powder into water, and pouring a certain amount of iron powder into the liquid;
s2, vertically placing a stirring rod of a disperser into water in a stirring tank, wherein stirring blades are required to be positioned at a position from top to bottom 2/3 of the longitudinal direction of the liquid;
s3, starting a disperser, and adjusting the rotating speed, wherein the rotating speed is required by the crystalline flake graphite powder which does not float on the surface of the vortex;
s4, maintaining a stirring state, namely attaching a rubidium magnet block to a designated position on the outer wall of the stirring tank, wherein the rubidium magnet block adsorbs iron powder particles in the liquid into clusters through the wall of the stirring tank, forming clustered collision targets on the wall of the stirring tank, wherein the positions and the number of the clustered targets influence the collision effect, and the adjustment is needed;
s5, adjusting a disperser, increasing the stirring rotation speed, and enabling flake graphite particles in the stirring tank to generate high-speed centrifugal motion under the pushing of high-speed rotating liquid and generate high-speed collision with iron powder cluster particles on a strong magnetic target;
s6, stirring at a high speed for every half hour, and allowing the rubidium magnet attached to the outside of the tank body to leave the tank body, so as to allow part of graphite particles stirred into the iron powder clusters to diffuse back into the liquid to participate in collision;
step S7, continuously stirring and colliding for about 48 hours at a high speed, wherein most of graphite particles in the liquid are impacted into dispersed graphene films, and the liquid is changed from turbid to almost transparent;
and S8, stopping stirring, separating the stirrer from the tank body, keeping the rubidium magnet at the original position, slowly pouring out the liquid in the tank, and thus finishing preparation.
2. The method for exfoliation of graphene by mass-differential collision exfoliation method according to claim 1, wherein: in the step S1, the weight ratio of the crystalline flake graphite powder to the deionized water is 5:10000.
3. The method for exfoliation of graphene by mass-differential collision exfoliation method according to claim 1, wherein: the rotational speed of the disperser in the step S5 is increased to 5000/min.
4. The method for exfoliation of graphene by mass-differential collision exfoliation method according to claim 1, wherein: the method also comprises the application of cement mortar coagulation:
according to the following steps of 1:8 or 1:10, diluting the carbon film slurry, mixing cement mortar or cement gravel concrete, and empirically adjusting the liquid amount according to the use scene;
the water-retaining property of the concrete can be improved by using the 'carbon film slurry' diluent, maintenance is not needed basically after pouring, the cracking resistance and freezing resistance of the concrete can be greatly improved, the concrete can be used for construction at the environmental temperature of 5 ℃ to minus 3 ℃, and the compression resistance of the concrete can be improved.
5. The method for exfoliation of graphene by mass-differential collision exfoliation method according to claim 1, wherein: the method also comprises the application of cement mortar fine dried noodle slurry:
diluting the carbon film slurry according to the ratio of 1:5 or 1:8, adding 5 per mill of polyvinyl alcohol rubber powder and a certain amount of foaming agent, stirring by a stirrer until the rubber powder is completely dissolved to form carbon film mixed glue solution, mixing the glue solution with cement mortar, and stirring the cement mortar sufficiently and rapidly by using the stirrer to enable a large amount of bubbles to appear in the cement mortar, wherein the viscosity is adjusted empirically according to the use situation;
the carbon film mixed glue solution and the mixed fine dried noodle cement mortar are used, so that the adhesive force of fine dried noodle slurry can be effectively improved, the cracking resistance and freezing resistance effects are obviously improved, the cement and sediment materials can be saved by about 15% under the condition of the same construction area and thickness, namely, the weight can be reduced by about 15% under the condition of the same volume, the cracking resistance and freezing resistance effects of the concrete fine dried noodles can be greatly improved, the concrete fine dried noodles can be constructed and used at the environmental temperature of 5 ℃ to minus 3 ℃, the sagging deformation of the concrete fine dried noodles can be prevented, and the sound insulation performance of a surface layer can be improved.
6. The method for exfoliation of graphene by mass-differential collision exfoliation method according to claim 1, wherein: the wall putty paste also comprises the application of the wall putty paste:
according to the following steps of 1:5, diluting the carbon film slurry, stirring putty powder, and empirically adjusting the liquid injection amount according to the use scene;
the use of the diluent of the carbon film slurry can greatly improve the cracking resistance and freezing resistance of the putty, and can be used for construction at the environmental temperature of 5 ℃ to-3 ℃.
7. The method for exfoliation of graphene by mass-differential collision exfoliation method according to claim 1, wherein: also included are applications for preparing "plant sand" particles:
before preparing the plant sand on a particle extruder, carrying out powder mixing by using carbon film stock solution, and adjusting the liquid adding amount according to extrusion discharge of equipment and particle forming performance;
the carbon film stock solution is used for preparing plant sand powder for granulation and carrying out granule spray coating, so that the bearing pressure of the formed granules can be improved, the dosage of other auxiliary materials can be reduced, the use effect is improved, and the cost is reduced.
8. The method for exfoliation of graphene by mass-differential collision exfoliation method according to claim 1, wherein: the method also comprises the application of preparing the carbon film crystal oscillator heat insulation paint:
adding polyvinyl alcohol powder into a basic solution of carbon film stock solution according to the weight ratio of 0.5-0.8%, stirring by a high-speed stirrer until the polyvinyl alcohol powder is completely dissolved, adding polyacrylamide powder of 0.01-0.02%, stirring by the high-speed stirrer until the polyacrylamide powder is completely dissolved, adding a plurality of quartz and mica mixed powder in the weight ratio of 1:1 into the mixed stock solution, stirring uniformly by a stirrer, wherein the adding amount of the quartz and mica mixed powder is empirically adjusted according to actual use scenes (such as spraying or smearing), and fully stirring to prevent uneven precipitation concentration before use;
the carbon film stock solution is a core base material for preparing a carbon film crystal oscillator heat insulation coating, and plays a key role in forming heat reflection by inducing a silicon crystal oscillator by the carbon film crystal oscillator in the coating;
the carbon film crystal vibration heat insulation coating can be directly brushed or sprayed on the surfaces of different materials through laboratory operation, and the coated surface is a heating surface; the heat insulation effect can be used for checking related test record data;
the carbon film crystal vibration heat-insulating coating can be directly smeared on the surface of the outer wall of a building, is completely flame-retardant, is not influenced by rain wash, does not need to additionally arrange other attachment pieces, and does not influence the heat-insulating effect on the wall body when the outer wall paint is attached on the surface of the film crystal vibration heat-insulating coating.
9. The method for exfoliation of graphene by mass-differential collision exfoliation method according to claim 1, wherein: also included are applications of "cement-sand concrete impervious":
the method comprises the following steps of: 0.2%o: 2% adding two kinds of powder of polyacrylamide and polyvinyl alcohol in a weight ratio, stirring by a stirrer until the powder is completely dissolved, adding 1%o of defoaming agent to form 'carbon-based vinyl film slurry', uniformly coating the slurry on a concrete impermeable surface, and coating the slurry once again after the slurry is dried and fixed;
diluting the carbon film stock solution with clear water in a ratio of 5:1, and then mixing the raw solution with the clear water according to the ratio of 1: 0.2%o: 2% adding two kinds of powder of polyacrylamide and polyvinyl alcohol into the diluent in a weight ratio, stirring by using a stirrer until the powder is completely dissolved, adding 1 per mill of defoamer to form 'carbon-based vinyl membrane diluted slurry', mixing cement mortar with the diluted slurry, and empirically adjusting the dosage of the diluted slurry according to the use scene of the cement mortar;
the use of the carbon-based vinyl film slurry can effectively improve the impermeability of cement sand concrete.
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