CN113122112A - Preparation method of nano-carbon anticorrosive conductive coating - Google Patents
Preparation method of nano-carbon anticorrosive conductive coating Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims abstract description 60
- 239000011248 coating agent Substances 0.000 title claims abstract description 58
- 229910021392 nanocarbon Inorganic materials 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- 238000002156 mixing Methods 0.000 claims abstract description 106
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 46
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 46
- 239000002923 metal particle Substances 0.000 claims abstract description 29
- 239000002134 carbon nanofiber Substances 0.000 claims abstract description 28
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 26
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000002086 nanomaterial Substances 0.000 claims abstract description 22
- 238000003851 corona treatment Methods 0.000 claims abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 238000000227 grinding Methods 0.000 claims abstract description 7
- 238000000265 homogenisation Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 239000003822 epoxy resin Substances 0.000 claims description 31
- 229920000647 polyepoxide Polymers 0.000 claims description 31
- 239000007788 liquid Substances 0.000 claims description 25
- 238000003756 stirring Methods 0.000 claims description 18
- 239000003575 carbonaceous material Substances 0.000 claims description 17
- 239000003086 colorant Substances 0.000 claims description 16
- 239000006184 cosolvent Substances 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 239000003085 diluting agent Substances 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 239000002562 thickening agent Substances 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 5
- 229910052755 nonmetal Inorganic materials 0.000 claims description 5
- 238000002604 ultrasonography Methods 0.000 claims description 5
- 230000002045 lasting effect Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000009210 therapy by ultrasound Methods 0.000 abstract description 2
- 239000004593 Epoxy Substances 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011231 conductive filler Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- 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
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
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- 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
- C09D5/24—Electrically-conducting paints
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0862—Nickel
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Conductive Materials (AREA)
Abstract
The invention discloses a preparation method of a nano-carbon anticorrosive conductive coating, in particular to the technical field of conductive coatings, wherein in the process of mixing a carbon nano-tube and a carbon nano-fiber, the carbon nano-tube and the carbon nano-fiber need to be subjected to ultrasonic treatment, grinding, cutting and high-pressure homogenization in advance, so that the density of the carbon nano-tube and the carbon nano-fiber is ensured, the density of the coating after processing is ensured, and the carbon nano-tube, the carbon nano-fiber and metal particles are mixed and subjected to corona treatment, so that the conductive effect of the conductive carbon nano-material is improved, the strength of the conductive carbon nano-material is ensured, the possibility of nickel powder oxidation is further reduced, the condition that the structure of the coating is unstable due to the entry of gas in the preparation process can be effectively reduced, the service life of the coating is prolonged, and the possibility that the coating cracks or falls off in use due to the adhesion of gas is reduced.
Description
Technical Field
The invention relates to the technical field of conductive coatings, in particular to a preparation method of a nano-carbon anticorrosive conductive coating.
Background
The PTC effect, i.e. positive temperature coefficient effect, means that the resistance of the material increases with increasing temperature. The PTC effect can effectively protect the heating body in the electric heating element, the resistance is increased along with the rise of the temperature, the power is reduced, the self-adaptive control of the temperature can be realized, and the PTC effect is a safe and reliable overheating protection means. With the continuous emergence of electric heating products in recent years, the planar heating film adopting the coating printing process becomes a new generation of high-efficiency electric heating technology due to the characteristics of uniform heating, high heat energy utilization rate, large radiation area, low current density, low electromagnetic radiation and the like. The core technology of the products is printing ink, wherein carbon-based electrothermal ink taking carbon materials as main conductive fillers becomes a mainstream product. However, the carbon material is an NTC (negative temperature coefficient) material, and the resistance decreases with the increase of temperature, and the continuous increase of power brings great problems to the use safety.
The conductive ground rod is a key part for electric power grounding in an electric power system, because the ground rod is iron, the ground rod is exposed in the air or inserted in the ground when in use and is easy to oxidize and corrode, in order to prevent the ground rod from being oxidized and corroded, copper is generally plated on the surface of the ground rod or conductive paint is coated on the surface of the ground rod, a copper plated layer still can not be prevented from being corroded, and only the corrosion speed is delayed.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a preparation method of a nano-carbon anticorrosive conductive coating, and the technical problems to be solved by the invention are as follows: at present, the commonly used conductive coating is prepared by using stone walk on tiptoe or nickel powder as a raw material, the conductive coating prepared from graphite is easy to crack after being dried, so that the sealing performance is poor, the nickel powder is easy to oxidize, however, the conductivity of the conductive coating is difficult to guarantee by replacing the nickel powder with other materials, and therefore, how to solve the problems of oxidation of the nickel powder and improvement of the conductive effect of the conductive coating becomes necessary to solve.
In order to achieve the purpose, the invention provides the following technical scheme: a nano-carbon anticorrosive conductive coating comprises the following materials:
the conductive nano carbon material, the water-based epoxy resin, the diluent, the nickel powder, the hydrophilic cosolvent, the pure water, the flatting agent and the coloring agent.
The raw material ratio is as follows:
35 parts of conductive nano carbon material, 25 parts of waterborne epoxy resin, 10 parts of diluent, 5 parts of nickel powder, 10 parts of hydrophilic cosolvent, 13 parts of pure water, 1 part of flatting agent and 1 part of coloring agent.
As a further scheme of the invention: the conductive nano carbon material comprises the following raw materials:
carbon nanotubes, carbon nanofibers, and metal particles.
The raw material ratio is as follows:
30 parts of carbon nano-tubes, 35 parts of carbon nano-fibers and 25 parts of metal particles.
As a further scheme of the invention: the preparation method comprises the following steps:
s1, pouring the carbon nanotubes and the carbon nanofibers into a mixing barrel, mixing the carbon nanotubes and the carbon nanofibers through high-speed rotation inside the mixing barrel, wherein a cylindrical mixing stirring shaft is adopted as a stirring shaft of the mixing barrel in the mixing process, and metal particles are added after mixing for 10-15 min.
And S2, continuously operating the mixing barrel for 5-10 min after the metal particles are poured into the mixing barrel, pouring the metal particles into a non-metal container after mixing is finished, so as to obtain a secondary conductive nano material, communicating the container bearing the secondary conductive nano material with the secondary conductive nano material, placing the secondary conductive nano material into a single gas environment, forming plasma in the gas environment to perform corona treatment on the carbon nanotubes, and generating discharge current among the carbon nanotubes, so as to obtain the conductive carbon nanotube.
As a further scheme of the invention: the preparation method comprises the following preparation steps:
step A: uniformly mixing the conductive nano carbon material, the flatting agent, the diluent and the nickel powder in a stirring manner, preparing uniformly dispersed conductive nano carbon liquid by tools such as ultrasound, grinding, cutting and high-pressure homogenization, standing and defoaming for later use.
And B: treating the residual water-based epoxy resin and pure water by a high-speed dispersion machine for 40-100 min, mixing the treated water tank epoxy resin solution with the conductive nano carbon liquid, treating the water-based epoxy resin by adopting a vacuum environment in the mixing process to prevent the water-based epoxy resin from generating bubbles, ensuring that the internal rotating speed of the mixing container is 300-500 rpm in the mixing process, adjusting the internal rotating speed of the mixing container after lasting for 20-25 min to keep the rotating speed at 100rpm, adding the conductive nano carbon liquid, the hydrophilic cosolvent and the coloring agent for fully mixing, and finally adding the thickening agent to adjust the viscosity of the coating to obtain the nano carbon anticorrosive conductive coating.
As a further scheme of the invention: the metal particles in the S2 are set to be nickel powder, and the length of the carbon nanotube is between 4nm and 0.8 mm.
As a further scheme of the invention: the particle size of the metal particles in the S2 is between 2nm and 250 um.
As a further scheme of the invention: when the nickel powder is subjected to corona treatment in the S2, the obtained stability is 700-900 ℃, the step of mixing and adding the hydrophilic cosolvent, the coloring agent and the thickening agent in the step B needs to be in a vacuum state in a mixing container, so that bubbles are prevented from being generated during stirring and mixing.
The invention has the beneficial effects that:
1. according to the invention, in the process of mixing the carbon nano-tubes and the carbon nano-fibers, the carbon nano-tubes and the carbon nano-fibers need to be subjected to ultrasonic treatment, grinding, cutting and high-pressure homogenization in advance, so that the densities of the carbon nano-tubes and the carbon nano-fibers are ensured, the density of the coating is ensured when the conductive carbon nano-liquids are mixed with the aqueous epoxy resin, and the coating is not easy to have strength cross-bottom in the process of processing and using so as to cause surface wrinkling or even cracking;
2. according to the invention, the vacuum mode is adopted for mixing treatment in the process of treating the water-based epoxy resin, the pure water and the conductive nano carbon liquid, so that the possibility that air is contained in the mixed coating due to the entrance of outside air in the process of mixing the water-based epoxy resin, the pure water and the conductive nano carbon liquid is greatly reduced, the condition that the structure of the internal material of the coating is unstable due to the entrance of gas in the preparation process can be effectively reduced, the service life of the coating is prolonged, and the possibility that the coating cracks or falls off in use due to the adhesion of the gas is reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a nano-carbon anticorrosive conductive coating comprises the following materials:
the conductive nano carbon material, the water-based epoxy resin, the diluent, the nickel powder, the hydrophilic cosolvent, the pure water, the flatting agent and the coloring agent.
The raw material ratio is as follows:
35 parts of conductive nano carbon material, 25 parts of waterborne epoxy resin, 10 parts of diluent, 5 parts of nickel powder, 10 parts of hydrophilic cosolvent, 13 parts of pure water, 1 part of flatting agent and 1 part of coloring agent.
The conductive nano carbon material comprises the following raw materials:
carbon nanotubes, carbon nanofibers, and metal particles.
The raw material ratio is as follows:
30 parts of carbon nano-tubes, 35 parts of carbon nano-fibers and 25 parts of metal particles.
A preparation method of a nano-carbon anticorrosive conductive coating comprises the following preparation methods:
s1, pouring the carbon nanotubes and the carbon nanofibers into a mixing barrel, mixing the carbon nanotubes and the carbon nanofibers through high-speed rotation inside the mixing barrel, wherein a cylindrical mixing stirring shaft is adopted as a stirring shaft of the mixing barrel in the mixing process, and metal particles are added after mixing for 10-15 min.
And S2, continuously operating the mixing barrel for 5-10 min after the metal particles are poured into the mixing barrel, pouring the metal particles into a non-metal container after mixing is finished, so as to obtain a secondary conductive nano material, communicating the container bearing the secondary conductive nano material with the secondary conductive nano material, placing the secondary conductive nano material into a single gas environment, forming plasma in the gas environment to perform corona treatment on the carbon nanotubes, and generating discharge current among the carbon nanotubes, so as to obtain the conductive carbon nanotube.
A preparation method of a nano-carbon anticorrosive conductive coating comprises the following preparation steps:
step A: uniformly mixing the conductive nano carbon material, the flatting agent, the diluent and the nickel powder in a stirring manner, preparing uniformly dispersed conductive nano carbon liquid by tools such as ultrasound, grinding, cutting and high-pressure homogenization, standing and defoaming for later use.
And B: treating the residual water-based epoxy resin and pure water by a high-speed dispersion machine for 40-100 min, mixing the treated water tank epoxy resin solution with the conductive nano carbon liquid, treating the water-based epoxy resin by adopting a vacuum environment in the mixing process to prevent the water-based epoxy resin from generating bubbles, ensuring that the internal rotating speed of the mixing container is 300-500 rpm in the mixing process, adjusting the internal rotating speed of the mixing container after lasting for 20-25 min to keep the rotating speed at 100rpm, adding the conductive nano carbon liquid, the hydrophilic cosolvent and the coloring agent for fully mixing, and finally adding the thickening agent to adjust the viscosity of the coating to obtain the nano carbon anticorrosive conductive coating.
The metal particles in S2 are nickel powder, and the length of the carbon nanotube is between 4nm and 0.8 mm.
The particle size of the metal particles in S2 is between 2nm and 250 um.
When the nickel powder is subjected to corona treatment in the S2, the stability is 700-900 ℃, and the step of mixing and adding the hydrophilic cosolvent, the coloring agent and the thickening agent in the step B needs to be in a vacuum state in a mixing container, so that bubbles are prevented from being generated during stirring and mixing.
Example 2:
the preparation method of the nano carbon anticorrosive conductive coating is the same as that of the embodiment 1, and the preparation method only comprises the following steps:
s1, pouring the carbon nanotubes and the carbon nanofibers into a mixing barrel, mixing the carbon nanotubes and the carbon nanofibers through high-speed rotation inside the mixing barrel, wherein a cylindrical mixing stirring shaft is adopted as a stirring shaft of the mixing barrel in the mixing process, and metal particles are added after mixing for 10-15 min.
And S2, continuously operating the mixing barrel for 5-10 min after the metal particles are poured into the mixing barrel, pouring the metal particles into a non-metal container after mixing is finished, so as to obtain a secondary conductive nano material, communicating the container bearing the secondary conductive nano material with the secondary conductive nano material, placing the secondary conductive nano material into a single gas environment, forming plasma in the gas environment to perform corona treatment on the carbon nanotubes, and generating discharge current among the carbon nanotubes, so as to obtain the conductive carbon nanotube.
The preparation method comprises the following preparation steps:
step A: uniformly mixing the conductive nano carbon material, the flatting agent, the diluent and the nickel powder in a stirring manner to obtain uniformly dispersed conductive nano carbon liquid, and standing for defoaming for later use.
And B: treating the residual water-based epoxy resin and pure water by a high-speed dispersion machine for 40-100 min, mixing the treated water tank epoxy resin solution with the conductive nano carbon liquid, treating the water-based epoxy resin by adopting a vacuum environment in the mixing process to prevent the water-based epoxy resin from generating bubbles, ensuring that the internal rotating speed of the mixing container is 300-500 rpm in the mixing process, adjusting the internal rotating speed of the mixing container after lasting for 20-25 min to keep the rotating speed at 100rpm, adding the conductive nano carbon liquid, the hydrophilic cosolvent and the coloring agent for fully mixing, and finally adding the thickening agent to adjust the viscosity of the coating to obtain the nano carbon anticorrosive conductive coating.
Example 3:
the preparation method comprises the following steps:
the preparation method of the nano carbon anticorrosive conductive coating is the same as that of the embodiment 1, and the preparation method only comprises the following steps:
s1, pouring the carbon nanotubes and the carbon nanofibers into a mixing barrel, mixing the carbon nanotubes and the carbon nanofibers through high-speed rotation inside the mixing barrel, wherein a cylindrical mixing stirring shaft is adopted as a stirring shaft of the mixing barrel in the mixing process, and metal particles are added after mixing for 10-15 min.
And S2, continuously operating the mixing barrel for 5-10 min after the metal particles are poured into the mixing barrel, pouring the metal particles into a non-metal container after mixing is finished, so as to obtain a secondary conductive nano material, communicating the container bearing the secondary conductive nano material with the secondary conductive nano material, placing the secondary conductive nano material into a single gas environment, forming plasma in the gas environment to perform corona treatment on the carbon nanotubes, and generating discharge current among the carbon nanotubes, so as to obtain the conductive carbon nanotube.
Step A: uniformly mixing the conductive nano carbon material, the flatting agent, the diluent and the nickel powder in a stirring manner, preparing uniformly dispersed conductive nano carbon liquid by tools such as ultrasound, grinding, cutting and high-pressure homogenization, standing and defoaming for later use.
And B: treating the residual water-based epoxy resin and pure water by a high-speed dispersion machine for 40-100 min, mixing the treated water tank epoxy resin solution with the conductive nano carbon liquid, ensuring that the internal rotation speed of the mixing container is 300-500 rpm in the mixing process, adjusting the internal rotation speed of the mixing container after the mixing container is continuously used for 20-25 min, keeping the rotation speed of the mixing container at 100rpm, adding the conductive nano carbon liquid, adding a hydrophilic cosolvent and a coloring agent for fully mixing, and finally adding a thickening agent to adjust the viscosity of the coating to obtain the nano carbon anticorrosive conductive coating.
In conclusion, the present invention: when the uniformly dispersed conductive nano carbon liquid prepared by tools such as ultrasound, grinding, cutting, high-pressure homogenization and the like is not adopted, and the conductive nano carbon liquid is mixed with the aqueous epoxy resin, the aqueous epoxy resin is easy to crack on the surface during smearing and using due to unequal density of the internal mixture, and air leakage or air bubbles are easy to occur between the mixtures due to unequal density of the mixtures, so that the service life of the coating is greatly reduced, when the coating is prepared by mixing the epoxy resin and the conductive nano carbon liquid in a vacuum environment, air is fully mixed with the aqueous epoxy resin and the conductive nano carbon liquid due to high-speed rotation during mixing, the internal structure of the coating obtained by the method is extremely unstable, the service life of the coating is difficult to guarantee, and when the external temperature is too high or too low, the paint surface may also crack or peel.
Through in-process mixing carbon nanotube and carbon nanofiber, need carry out supersound to carbon nanotube and carbon nanofiber in advance, grind, cutting and high-pressure homogeneity, thereby guarantee carbon nanotube and carbon nanofiber's density, make when mixing electrically conductive carbon nanofiber liquid with waterborne epoxy, guarantee the density of this coating, make this coating in the in-process that finishes processing and use difficult intensity to meet the end and lead to the condition that the surface corrugates or even ftractures, and through mixing carbon nanotube and carbon nanofiber and metal particle and corona treatment, thereby conductive carbon material's electrically conductive effect has been improved, and the intensity of electrically conductive carbon nanotube has been guaranteed, and then the possibility of nickel powder oxidation has been reduced.
Through the mode of adopting the vacuum to mix the processing at the in-process of handling waterborne epoxy, pure water and electrically conductive nanometer carbon liquid, thereby greatly reduced at the in-process of mixing waterborne epoxy, pure water and electrically conductive nanometer carbon liquid, the coating inside that leads to mixing to finish because of the entering of outside air contains the possibility of air, make this coating can effectually reduce because of the entering of preparation in-process gas and lead to the unstable condition to appear between this coating internal material, thereby improved the life of this coating, and reduced this coating because the adhesion of gas and the possibility that the fracture appears or drops when leading to using.
Due to the arrangement of the coloring agent, the color of the coating can be selected according to the required coating position after the coating is prepared, and the absorption efficiency and the reflection efficiency of different colors to sunlight are different, so that the applicability of the coating is improved.
The points to be finally explained are: although the present invention has been described in detail with reference to the general description and the specific embodiments, on the basis of the present invention, the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A nano carbon anticorrosive conductive coating is characterized in that: comprises the following materials:
the conductive nano carbon material, the water-based epoxy resin, the diluent, the nickel powder, the hydrophilic cosolvent, the pure water, the flatting agent and the coloring agent.
The raw material ratio is as follows:
35 parts of conductive nano carbon material, 25 parts of waterborne epoxy resin, 10 parts of diluent, 5 parts of nickel powder, 10 parts of hydrophilic cosolvent, 13 parts of pure water, 1 part of flatting agent and 1 part of coloring agent.
2. The nano-carbon anticorrosive conductive coating as claimed in claim 1, wherein: the conductive nano carbon material comprises the following raw materials:
carbon nanotubes, carbon nanofibers, and metal particles.
The raw material ratio is as follows:
30 parts of carbon nano-tubes, 35 parts of carbon nano-fibers and 25 parts of metal particles.
3. The preparation method of the nano-carbon anticorrosive conductive coating as claimed in claim 2 comprises the following preparation methods:
s1, pouring the carbon nanotubes and the carbon nanofibers into a mixing barrel, mixing the carbon nanotubes and the carbon nanofibers through high-speed rotation inside the mixing barrel, wherein a cylindrical mixing stirring shaft is adopted as a stirring shaft of the mixing barrel in the mixing process, and metal particles are added after the mixing for 10-15 min;
and S2, continuously operating the mixing barrel for 5-10 min after the metal particles are poured into the mixing barrel, pouring the metal particles into a non-metal container after mixing is finished, so as to obtain a secondary conductive nano material, communicating the container bearing the secondary conductive nano material with the secondary conductive nano material, placing the secondary conductive nano material into a single gas environment, forming plasma in the gas environment to perform corona treatment on the carbon nanotubes, and generating discharge current among the carbon nanotubes, so as to obtain the conductive carbon nanotube.
4. The preparation method of the nano-carbon anticorrosive conductive coating according to claim 3, comprising the following preparation steps:
step A: uniformly mixing the conductive nano carbon material, the flatting agent, the diluent and the nickel powder in a stirring manner, preparing uniformly dispersed conductive nano carbon liquid by tools such as ultrasound, grinding, cutting and high-pressure homogenization, standing and defoaming for later use;
and B: treating the residual water-based epoxy resin and pure water by a high-speed dispersion machine for 40-100 min, mixing the treated water tank epoxy resin solution with the conductive nano carbon liquid, treating the water-based epoxy resin by adopting a vacuum environment in the mixing process to prevent the water-based epoxy resin from generating bubbles, ensuring that the internal rotating speed of the mixing container is 300-500 rpm in the mixing process, adjusting the internal rotating speed of the mixing container after lasting for 20-25 min to keep the rotating speed at 100rpm, adding the conductive nano carbon liquid, the hydrophilic cosolvent and the coloring agent for fully mixing, and finally adding the thickening agent to adjust the viscosity of the coating to obtain the nano carbon anticorrosive conductive coating.
5. The preparation method of the nano-carbon anticorrosive conductive coating according to claim 4, characterized in that: the metal particles in the S2 are set to be nickel powder, and the length of the carbon nanotube is between 4nm and 0.8 mm.
6. The preparation method of the nano-carbon anticorrosive conductive coating according to claim 3, characterized in that: the particle size of the metal particles in the S2 is between 2nm and 250 um.
7. The preparation method of the nano-carbon anticorrosive conductive coating according to claim 5, characterized in that: when the nickel powder is subjected to corona treatment in the S2, the obtained stability is 700-900 ℃, the step of mixing and adding the hydrophilic cosolvent, the coloring agent and the thickening agent in the step B needs to be in a vacuum state in a mixing container, so that bubbles are prevented from being generated during stirring and mixing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110613924.9A CN113122112A (en) | 2021-06-02 | 2021-06-02 | Preparation method of nano-carbon anticorrosive conductive coating |
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| CN202110613924.9A CN113122112A (en) | 2021-06-02 | 2021-06-02 | Preparation method of nano-carbon anticorrosive conductive coating |
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Cited By (1)
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