CN111560191A - Corrosion-resistant flame-retardant graphene high-conductivity ink and preparation method thereof - Google Patents
Corrosion-resistant flame-retardant graphene high-conductivity ink and preparation method thereof Download PDFInfo
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- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
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- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
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- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D11/107—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
Abstract
The invention provides an anti-corrosion flame-retardant graphene high-conductivity ink and a preparation method thereof, wherein the method comprises the following steps: s1, dispersing the graphene powder, the nano silver powder and the nano-scale flame retardant in a solvent to obtain uniform dispersion liquid, and drying to obtain composite powder; s2, dispersing and mixing the wetting dispersant and water at a high speed, adding the composite powder, and uniformly mixing to obtain a first mixture; s3, dispersing and mixing the resin, the film forming additive and the antirust agent at a high speed to obtain a second mixture; s4, adding the second mixture, a thickening agent and a defoaming agent into the first mixture, and uniformly mixing to obtain a third mixture; and S5, performing ball milling and filtering on the third mixture. According to the scheme provided by the invention, the sheet resistance of the obtained graphene conductive ink is less than 16 omega/□ @30 mu m, the sheet resistance difference value of each point is less than or equal to 1 omega/□, the salt spray resistance is good for 500h, and the fire-resistant time is more than 20 min.
Description
Technical Field
The invention relates to the field of conductive ink materials, in particular to the field of graphene modified conductive ink composite materials.
Background
The conductive ink is a composite conductive polymer material formed by adding conductive filler powder, such as carbon black, graphite, silver, copper and the like, into a polymer material, and is widely applied to printed circuit boards, membrane switches, REI D radio frequency identification, printed resistors and the like. The conductive ink can be classified into gold-based conductive ink, silver-based conductive ink, copper-based conductive ink, carbon-based conductive ink, and the like according to the properties of the conductive filler. The gold conductive ink has excellent comprehensive performance, but high price, and the application range is only limited to products with special requirements, such as thick film integrated circuits and the like. The conductivity of the silver conductive ink is second to that of the gold conductive ink, but the silver conductive ink is sensitive to temperature, has high temperature and strong conductive capability, and is poor otherwise. The copper-based conductive ink is widely used and has high cost performance, but has the characteristic of easy oxidation. The carbon-based conductive ink is low in price, difficult to oxidize and stable in performance, but relatively poor in conductivity.
At present, conductive fillers used in carbon-based conductive inks mainly include conductive graphite, acetylene black, carbon nanotubes, graphene and the like, and are mainly applied to printed resistors and film switches. The conductive ink prepared by taking the graphene as the conductive filler has good conductivity and printability, and has huge cost advantage compared with metal conductive ink, such as gold conductive ink, silver conductive ink, copper conductive ink and the like; compared with the traditional carbon-based conductive ink product, the graphene conductive ink has remarkable advantages in the aspect of conductivity.
However, at present, the graphene conductive ink has three major disadvantages. Firstly, compared with metal conductive ink, the graphene conductive ink has relatively low conductivity, and limits the application range of the graphene conductive ink in the fields of printed resistors and thin film switches; secondly, due to the high specific surface area, the graphene is easy to agglomerate, so that the graphene is difficult to disperse uniformly in an ink system, and the conductivity of the graphene is influenced when the graphene is applied to printing resistors and film switches; thirdly, the graphene conductive ink has poor corrosion resistance and is not flame-retardant, so that the printed resistor and the membrane switch cannot achieve good flame-retardant and corrosion-resistant performances in a special working environment.
The statements in the background section are merely prior art as they are known to the inventors and do not, of course, represent prior art in the field.
Disclosure of Invention
The invention aims to solve one or more of the problems in the prior art and provides a corrosion-resistant flame-retardant graphene high-conductivity ink.
The invention also aims to provide a preparation method of the corrosion-resistant flame-retardant graphene high-conductivity ink.
The purpose of the invention is realized by the following technical scheme:
the anti-corrosion flame-retardant graphene high-conductivity ink comprises the following raw material components in parts by weight:
according to one aspect of the invention, the graphene powder is a single-layer or multi-layer graphene microchip, the diameter of the graphene microchip is 0.5-6 mu m, and/or the thickness of the graphene microchip is 1-10 nm, and/or the specific surface area of the graphene microchip is 20-200 m2Per g, and/or the conductivity of the graphene nanoplatelets is 8 × 104～2×105S/m。
According to one aspect of the invention, the nano silver powder is ultrafine spherical silver powder, the average particle size is 20-50nm, and the purity is more than or equal to 99.9%.
According to one aspect of the invention, the nanoscale flame retardant is one or a mixture of more than two of nanoscale magnesium hydroxide, nanoscale antimony trioxide, nanoscale melamine cyanuric acid, nanoscale magnesium oxide and nanoscale aluminum hydroxide.
According to one aspect of the invention, the solvent is one or a mixture of more than two of N-methyl pyrrolidone, N-dimethylformamide, tetrahydrofuran, ethylene glycol butyl ether, propylene glycol methyl ether and N-butanol.
According to one aspect of the invention, the wetting dispersant is one or a mixture of more than two of polyacrylic acid ammonium salt, self-emulsifying modified polyacrylate, anionic wetting dispersant, cationic wetting dispersant, polyacrylic acid sodium salt, polyacrylic acid potassium salt and polyether modified organic silicon.
According to one aspect of the present invention, the resin is one or a mixture of two or more of acrylic resin, polyurethane resin, epoxy resin, amino resin, styrene-acrylic resin, fluorocarbon resin and polyester resin.
According to one aspect of the invention, the film forming aid is one or a mixture of two or more of ethylene glycol butyl ether acetate, dodecyl alcohol, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, propylene glycol phenyl ether, dipropylene glycol monomethyl ether and propylene glycol methyl ether acetate.
According to one aspect of the invention, the antirust agent is one or a mixture of two of sodium benzoate and sodium nitrite.
According to one aspect of the present invention, the thickener is one or a mixture of two or more of an associated polyurethane thickener, hydroxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, and an associated alkali swelling thickener.
According to one aspect of the invention, the defoaming agent is one or a mixture of more than two of emulsified silicone oil, n-butyl alcohol, organic siloxane, polyether modified organic silicon and polyether modified polydimethylsiloxane.
As the best scheme of the corrosion-resistant flame-retardant graphene high-conductivity ink, the corrosion-resistant flame-retardant graphene high-conductivity ink comprises the following raw material components in parts by weight:
in the best scheme, the solvent adopts N-methyl pyrrolidone, and the graphene powder can be better dispersed besides the function of the solvent. The wetting dispersant adopts self-emulsifying modified polyacrylate, so that powder materials can be better infiltrated by reducing the surface tension or the interfacial tension of the graphene powder, the nano silver powder and the nano flame retardant; and the aggregation of the powder material in an ink system is reduced, and the powder material can be uniformly dispersed. The resin is polyurethane resin, and the function of the resin also has the function of combining other components. The film forming assistant adopts dodecyl ester alcohol, so that the film forming property, the compactness and the luster of a coating film can be better improved, and the film forming temperature is reduced. The thickener is hydroxymethyl cellulose. When the micelle reaches a certain concentration to form a micelle, the micelle is associated with polymer chains in the resin to form a network structure, so that the viscosity of the system is increased, and the viscosity of the ink can be better adjusted. The defoaming agent adopts emulsified silicone oil. The rapid removal of bubbles generated in the ink during stirring, milling and dispersion can be better achieved by reducing or decreasing the surface tension of the bubbles.
According to one aspect of the invention, the raw material components are adopted, and the method comprises the following steps:
s1, dispersing the graphene powder, the nano silver powder and the nano-scale flame retardant in a solvent to obtain uniform dispersion liquid, and drying to obtain composite powder;
s2, dispersing and mixing the wetting dispersant and water at a high speed, adding the composite powder, and uniformly mixing to obtain a first mixture;
s3, dispersing and mixing the resin, the film forming auxiliary agent and the antirust agent at a high speed, and then, adding a second mixture;
s4, adding the second mixture, a thickening agent and a defoaming agent into the first mixture, and uniformly mixing to obtain a third mixture;
and S5, performing ball milling and filtering on the third mixture.
According to an aspect of the present invention, in S1, the graphene powder is first added into the solvent to be uniformly dispersed, and then the nano silver powder and the nano-scale flame retardant are added into the solvent to be uniformly dispersed.
In an aspect of the present invention, in S1, the adding graphene powder into a solvent to be uniformly dispersed is performed by: adding graphene powder into a solvent, and performing ultrasonic dispersion for 6-8 hours; further preferably, the ultrasonic frequency is 50-100KHz, and the ultrasonic dispersion environment temperature is 25-35 ℃.
According to an aspect of the present invention, in the S1, the adding of the nano silver powder and the nano-scale flame retardant into the solvent is performed by uniformly dispersing: adding nano silver powder and a nano fire retardant into a solvent, dispersing for 10-12h by ultrasonic waves; further preferably, the ultrasonic frequency is 50-100KHz, and the ultrasonic dispersion environment temperature is 25-35 ℃.
According to an aspect of the present invention, in S1, the drying is performed by: and (3) putting the dispersion liquid into an oven, drying at the temperature of 100-150 ℃, and completely drying to obtain composite powder.
According to an aspect of the present invention, in S2, the method for performing high-speed dispersive mixing of the wetting dispersant and the water includes: adding the wetting dispersant and water into a high-speed dispersion machine, and stirring at the rotating speed of 1000-1500r/min for 10-30 min.
According to an aspect of the present invention, in S2, the method for performing the uniform mixing includes: stirring at 4000-6000r/min for 40-60 min.
According to one aspect of the invention, in the step S3, the resin, the film-forming assistant and the antirust agent are added into a high-speed dispersion machine and stirred for 20-40min at the rotating speed of 2000-3000 r/min.
According to an aspect of the present invention, the specific method of S4 is: adding the second mixture into the first mixture, stirring at the rotating speed of 5000-.
According to an aspect of the invention, in the S5, the ball milling is carried out by using a planetary ball mill, and the ball milling is carried out for 20-40min at a rotation speed of 200-350 r/min. Preferably, the beads of the ball mill are mixed in a number of 1:2:3:4 using grinding balls having a diameter of 0.6cm, 0.8cm, 1.0cm, 1.2 cm.
According to an aspect of the present invention, in the S5, the filtering is performed by using 200-400 mesh cloth.
According to the invention, graphene powder, nano silver powder and a nano flame retardant are added into a solvent to carry out high-frequency ultrasonic dispersion, van der Waals force between graphene layers is destroyed by pressure instantly released by ultrasonic waves, and the nano silver powder and the nano flame retardant enter the graphene layers to form separation, so that the graphene is not easy to agglomerate together, and the dispersion uniformity of the graphene in an ink system is improved; meanwhile, the conductivity of the graphene conductive ink is enhanced by adding the nano silver powder, and the graphene conductive ink has excellent flame-retardant and corrosion-resistant functions by adding the nano flame retardant and the antirust agent.
The anti-corrosion flame-retardant graphene high-conductivity ink prepared by the invention has the following advantages:
the conductivity of the graphene conductive ink is enhanced, so that the application range of the graphene conductive ink in the fields of printed resistors and membrane switches is expanded;
secondly, the dispersion uniformity of the graphene in the ink system is improved, so that the conductivity of the ink is uniform, and the conductive effects of the printed resistor and the thin film switch are further improved;
and the graphene conductive ink has excellent flame-retardant and corrosion-resistant functions, so that the printed resistor and the film switch have good flame-retardant and corrosion-resistant properties in a special working environment.
In the prior art, the sheet resistance of the graphene conductive ink is more than or equal to 30 omega/□ @30 mu m, namely when the film thickness is 30 mu m, the sheet resistance is 30 omega/□, the sheet resistance difference value of each point is more than or equal to 5 omega/□, the salt spray resistance is 500h, and the fire resistance time is less than 10 min; according to the scheme provided by the invention, the sheet resistance of the obtained graphene conductive ink is less than 16 omega/□ @30 mu m, the sheet resistance difference value of each point is less than or equal to 1 omega/□, the salt spray resistance is good for 500h, and the fire-resistant time is more than 20 min.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the description is to be regarded as illustrative in nature and not as restrictive.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and description, and is not intended to limit the invention.
In the following examples, the beads to be ball-milled in the ball mill were mixed in an amount of 1:2:3:4 using balls having a diameter of 0.6cm, 0.8cm, 1.0cm and 1.2 cm.
Example 1 (best mode):
a preparation method of the corrosion-resistant flame-retardant graphene high-conductivity ink comprises the following steps:
(1) adding 18 parts of graphene powder into 50 parts of N-methyl pyrrolidone solvent, performing ultrasonic dispersion for 50KHz at the temperature of 30 ℃, adding 10 parts of nano silver powder and 6 parts of nano antimony trioxide flame retardant, performing ultrasonic dispersion for 12 hours, putting the prepared composite dispersion liquid into a drying oven, drying at the temperature of 120 ℃, and obtaining composite powder for standby after complete drying;
(2) adding 12.5 parts of self-emulsifying modified polyacrylate wetting dispersant and 60 parts of water into a high-speed dispersion machine, and stirring at the rotating speed of 1200r/min for 20 min;
(3) adding the composite powder prepared in the step 1 into the step 2, and stirring for 40min at the speed of 5000r/min to obtain a first mixture;
(4) adding 40 parts of polyurethane resin, 2.5 parts of dodecyl ester alcohol film-forming aid and 0.8 part of sodium nitrite antirust agent into a high-speed dispersion machine, and stirring at the rotating speed of 2500r/min for 30min to obtain a second mixture;
(5) adding the second mixture obtained in the step 4 into the first mixture obtained in the step 3, stirring at a rotating speed of 6000r/min for 60min, and then sequentially adding 1.5 parts of hydroxymethyl cellulose thickener and 0.8 part of silicone emulsion defoamer at the rotating speed, and stirring for 20min each time to obtain a third mixture;
(6) and (3) adding the third mixture obtained in the step (5) into a planetary ball mill, grinding and stirring at the rotating speed of 250r/min for 30min, and filtering with 250-mesh screen cloth to obtain the graphene high-conductivity ink which is uniformly dispersed and has the flame-retardant and corrosion-resistant functions.
Example 2:
a preparation method of the corrosion-resistant flame-retardant graphene high-conductivity ink comprises the following steps:
(1) adding 20 parts of graphene powder into 40 parts of N-methyl pyrrolidone solvent, performing ultrasonic dispersion for 8 hours at the ultrasonic frequency of 80KHz and the temperature of 35 ℃, adding 5 parts of nano silver powder and 5 parts of nano antimony trioxide flame retardant, performing ultrasonic dispersion for 12 hours, putting the prepared composite dispersion liquid into a drying oven, drying at the temperature of 100 ℃, and obtaining composite powder for later use after complete drying;
(2) adding 10 parts of polyacrylic ammonium salt wetting dispersant and 80 parts of water into a high-speed dispersion machine, and stirring at the rotating speed of 1000r/min for 30 min;
(3) adding the composite powder prepared in the step 1 into the step 2, adjusting the rotating speed to 4000r/min, and stirring for 60min to obtain a first mixture;
(4) adding 30 parts of polyurethane resin, 0.5 part of dodecyl ester alcohol film-forming aid and 0.5 part of sodium benzoate antirust agent into a high-speed dispersion machine, and stirring at the rotating speed of 2000r/min for 40min to obtain a second mixture;
(5) adding the second mixture obtained in the step 4 into the first mixture obtained in the step 3, stirring for 80min at the rotating speed of 5000r/min, and then sequentially adding 0.5 part of associative polyurethane thickener and 0.5 part of organic siloxane defoamer at the rotating speed, and stirring for 20min each time to obtain a third mixture;
(6) and (3) adding the third mixture obtained in the step (5) into a planetary ball mill, grinding and stirring at the rotating speed of 200r/min for 40min, and filtering with 250-mesh screen cloth to obtain the graphene high-conductivity ink which is uniformly dispersed and has the flame-retardant and corrosion-resistant functions.
Example 3:
a preparation method of the corrosion-resistant flame-retardant graphene high-conductivity ink comprises the following steps:
(1) adding 30 parts of graphene powder into 60 parts of tetrahydrofuran solvent, performing ultrasonic dispersion for 6 hours at the ultrasonic frequency of 100KHz and the temperature of 30 ℃, adding 10 parts of nano silver powder and 10 parts of nano magnesium hydroxide flame retardant, performing ultrasonic dispersion for 10 hours, putting the prepared composite dispersion into a drying oven, drying at the temperature of 150 ℃, and completely drying to obtain composite powder for later use;
(2) adding 20 parts of self-emulsifying modified polyacrylate wetting dispersant and 100 parts of water into a high-speed dispersion machine, and stirring at the rotating speed of 1500r/min for 10 min;
(3) adding the composite powder prepared in the step 1 into the step 2, adjusting the rotating speed to 6000r/min, and stirring for 40min to obtain a first mixture;
(4) adding 50 parts of amino resin, 2 parts of ethylene glycol monobutyl ether acetate film-forming assistant and 2 parts of sodium nitrite antirust agent into a high-speed dispersion machine, and stirring at the rotating speed of 3000r/min for 20min to obtain a second mixture;
(5) adding the second mixture obtained in the step 4 into the first mixture obtained in the step 3, stirring at a rotating speed of 6000r/min for 60min, then keeping the rotating speed, sequentially adding 1 part of associative alkali swelling thickener and 1 part of polyether modified organic silicon defoamer, and stirring for 10min each time to obtain a third mixture;
(6) and (3) adding the third mixture obtained in the step (5) into a planetary ball mill, grinding and stirring at the rotating speed of 350r/min for 20min, and filtering with 250-mesh screen cloth to obtain the graphene high-conductivity ink which is uniformly dispersed and has the flame-retardant and corrosion-resistant functions.
The inks of example 1, example 2 and comparative example were tested as follows:
after the ink is coated on a base material and dried and cured, a four-probe sheet resistance tester is adopted to carry out sheet resistance detection on the ink; the salt spray resistance test is detected according to GB/T10125-; the fire endurance test was carried out with reference to GB/T15442.2-1995.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The corrosion-resistant flame-retardant graphene high-conductivity ink is characterized by comprising the following raw material components in parts by weight:
2. the anti-corrosion flame-retardant graphene high-conductivity ink according to claim 1, wherein the graphene powder is single-layer or multi-layer graphene micro-sheets, the diameter of each graphene micro-sheet is 0.5-6 μm, the thickness of each graphene micro-sheet is 1-10 nm, and the specific surface area of each graphene micro-sheet is 20-200 m2Per g, and/or the conductivity of the graphene nanoplatelets is 8 × 104～2×105S/m。
3. The anti-corrosion flame-retardant graphene high-conductivity ink according to claim 1, wherein the nano silver powder is ultrafine spherical silver powder, the average particle size is 20-50nm, and the purity is more than or equal to 99.9%; and/or the presence of a gas in the gas,
the nano-scale flame retardant is one or a mixture of more than two of nano-scale magnesium hydroxide, nano-scale antimony trioxide, nano-scale melamine cyanuric acid, nano-scale magnesium oxide and nano-scale aluminum hydroxide; and/or the presence of a gas in the gas,
the solvent is one or a mixture of more than two of N-methyl pyrrolidone, N-dimethylformamide, tetrahydrofuran, ethylene glycol butyl ether, propylene glycol methyl ether and N-butyl alcohol; and/or the presence of a gas in the gas,
the wetting dispersant is one or a mixture of more than two of polyacrylic ammonium salt, self-emulsifying modified polyacrylate, anionic wetting dispersant, cationic wetting dispersant, polyacrylic acid sodium salt, polyacrylic acid potassium salt and polyether modified organic silicon; and/or the presence of a gas in the gas,
the resin is one or a mixture of more than two of acrylic resin, polyurethane resin, epoxy resin, amino resin, styrene-acrylic resin, fluorocarbon resin and polyester resin; and/or the presence of a gas in the gas,
the film-forming assistant is one or a mixture of more than two of ethylene glycol butyl ether acetate, dodecyl alcohol, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, propylene glycol phenyl ether, dipropylene glycol monomethyl ether and propylene glycol methyl ether acetate; and/or the presence of a gas in the gas,
the antirust agent is one or a mixture of two of sodium benzoate and sodium nitrite; and/or the presence of a gas in the gas,
the thickener is one or a mixture of more than two of associative polyurethane thickeners, hydroxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose and associative alkali swelling thickeners; and/or the presence of a gas in the gas,
the defoaming agent is one or a mixture of more than two of emulsified silicone oil, n-butyl alcohol, organic siloxane, polyether modified organic silicon and polyether modified polydimethylsiloxane.
4. The anti-corrosion flame-retardant graphene high-conductivity ink according to claim 1, characterized by comprising the following raw material components in parts by weight:
5. the preparation method of the corrosion-resistant flame-retardant graphene high-conductivity ink according to claim 1, wherein the raw material components according to any one of claims 1 to 4 are adopted, and the preparation method comprises the following steps:
s1, dispersing the graphene powder, the nano silver powder and the nano-scale flame retardant in a solvent to obtain uniform dispersion liquid, and drying to obtain composite powder;
s2, dispersing and mixing the wetting dispersant and water at a high speed, adding the composite powder, and uniformly mixing to obtain a first mixture;
s3, dispersing and mixing the resin, the film forming auxiliary agent and the antirust agent at a high speed, and then, adding a second mixture;
s4, adding the second mixture, a thickening agent and a defoaming agent into the first mixture, and uniformly mixing to obtain a third mixture;
and S5, performing ball milling and filtering on the third mixture.
6. The method for preparing the anti-corrosion flame-retardant graphene high-conductivity ink according to claim 5, wherein in the step S1, the graphene powder is added into the solvent to be uniformly dispersed, and then the nano silver powder and the nano-scale flame retardant are added into the solvent to be uniformly dispersed;
preferably, the method for adding the graphene powder into the solvent to be uniformly dispersed is as follows: adding graphene powder into a solvent, and performing ultrasonic dispersion for 6-8 hours; further preferably, the ultrasonic frequency is 50-100KHz, and the temperature of the ultrasonic dispersion environment is 25-35 ℃;
preferably, the execution method for adding the nano silver powder and the nano-scale flame retardant into the solvent to be uniformly dispersed comprises the following steps: adding nano silver powder and a nano fire retardant into a solvent, dispersing for 10-12h by ultrasonic waves; further preferably, the ultrasonic frequency is 50-100KHz, and the temperature of the ultrasonic dispersion environment is 25-35 ℃;
preferably, the drying method includes: and (3) putting the dispersion liquid into an oven, drying at the temperature of 100-150 ℃, and completely drying to obtain composite powder.
7. The method for preparing the anti-corrosion flame-retardant graphene high-conductivity ink according to claim 5, wherein in the step S2, the wetting dispersant and the water are dispersed and mixed at a high speed by: adding the wetting dispersant and water into a high-speed dispersion machine, and stirring at the rotating speed of 1000-1500r/min for 10-30 min;
preferably, the method for uniformly mixing comprises the following steps: stirring at 4000-6000r/min for 40-60 min.
8. The method for preparing the anti-corrosion flame-retardant graphene high-conductivity ink as claimed in claim 5, wherein in the step S3, the resin, the film-forming assistant and the antirust agent are added into a high-speed dispersion machine for dispersion and mixing, and the mixture is stirred at a rotation speed of 2000-3000r/min for 20-40 min.
9. The preparation method of the corrosion-resistant flame-retardant graphene high-conductivity ink according to claim 5, wherein the specific method of S4 is as follows: adding the second mixture into the first mixture, stirring at the rotating speed of 5000-.
10. The method for preparing the corrosion-resistant flame-retardant graphene high-conductivity ink as claimed in claim 5, wherein in the step S5, the ball milling is performed by using a planetary ball mill, and the ball milling is performed at a rotation speed of 200-;
preferably, the filtration is performed by using 200-400-mesh net cloth;
preferably, the beads of the ball mill are mixed in a number of 1:2:3:4 using grinding balls having a diameter of 0.6cm, 0.8cm, 1.0cm, 1.2 cm.
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| CN116376341A (en) * | 2023-03-08 | 2023-07-04 | 安徽宇航派蒙健康科技股份有限公司 | Conductive filler, conductive film, electrothermal film and preparation method |
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