CN110776786A - Graphene nano-silver composite conductive ink and preparation method thereof - Google Patents
Graphene nano-silver composite conductive ink and preparation method thereof Download PDFInfo
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- 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
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- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
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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
- C09D11/102—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds
- C09D11/103—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds of aldehydes, e.g. phenol-formaldehyde 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
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- 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
- 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
- C09D11/108—Hydrocarbon resins
Abstract
The invention discloses graphene nano-silver composite conductive ink and a preparation method thereof. The graphene nano-silver composite conductive ink comprises, by weight, 10-20 parts of resin, 10-20 parts of graphene nano-silver powder, 10-20 parts of an organic solvent, 1-3 parts of a dispersing agent, 1-3 parts of a defoaming agent and 1-3 parts of an antioxidant; wherein: the graphene nano silver powder is prepared by a photo-reduction method. The conductive ink prepared by the invention is used as a conductive agent, conductive nano-silver particles are well loaded on graphene sheets, the structure is stable, the conductive nano-silver particles are not easy to fall off, and meanwhile, the conductive ink also serves as nodes of a conductive network, the number of conductive network paths is increased, the conductive network of graphene can be assisted and perfected, the number of conductive particles in unit volume is increased, and the conductive ink is high in conductivity and low in resistivity. In addition, the conductive ink prepared by the invention has good printability, and the printed ink layer has the advantages of low resistivity, stable conductivity, good conductivity and the like, and has wide market application prospect.
Description
Technical Field
The invention relates to conductive ink, in particular to graphene nano-silver composite conductive ink and a preparation method thereof.
Background
Conductive ink refers to a paste ink made with conductive materials such as gold, silver, copper, and carbon dispersed in a vehicle. Has a certain degree of conductive property, and can be used for printing conductive points or conductive circuits. At present, the conductive silver paste which is researched more mature at present has excellent conductivity, but the silver is expensive, the preparation cost is too high, and the wide application of the conductive silver paste is not facilitated. Common fillers in common carbon-based conductive ink, including carbon black, graphite, carbon fiber and the like, are low in cost, but poor in stability and low in conductivity, and obviously cannot meet the development requirements of the future printed electronic industry.
Graphene is prepared from carbon atoms in sp
2The hexagonal honeycomb-lattice two-dimensional carbon nanomaterial formed by the hybrid tracks is the thinnest two-dimensional material in the world at present, has extremely excellent optical, electrical and mechanical properties, and has a large number of literature reports in the fields of materials science, micro-nano processing, photoelectric devices, biomedical materials and the like. With the development of graphene preparation technology, graphene conductive ink has been involved in various application fields including functional sensors, photovoltaic cells, flexible electronic screens, printed microcircuits, radio frequency identification and the like. However, the graphene conductive ink has poor dispersibility, is easy to agglomerate, has poor printability and is not beneficial to large-scale production. Therefore, the research and the preparation of the novel graphene composite conductive ink with better performance are very important.
At present, documents that graphene nano silver powder is prepared by adopting a photo-reduction method and applied to conductive ink as a conductive filler are not reported.
Disclosure of Invention
Aiming at the problems or defects in the prior art, the invention aims to provide graphene nano-silver composite conductive ink and a preparation method thereof.
In order to achieve the first object of the present invention, the present invention adopts the following technical solutions:
the graphene nano-silver composite conductive ink comprises, by weight, 10-20 parts of resin, 10-20 parts of graphene nano-silver powder, 10-20 parts of an organic solvent, 1-3 parts of a dispersing agent, 1-3 parts of a defoaming agent and 1-3 parts of an antioxidant.
Further, in the above technical solution, the resin includes any one or more of epoxy resin, phenolic resin, polyester resin, fluorocarbon resin, acrylic resin, polyamide resin, and polyurethane resin.
Further, in the above technical solution, the organic solvent includes any one or more of ethanol, isopropanol, propylene glycol, ethyl formate, and ethyl acetate.
Further, in the technical scheme, the dispersant is any one of polyvinyl alcohol, polyethylene glycol, polyvinylpyrrolidone, styrene butadiene rubber, sodium carboxymethylcellulose, hexadecyl ammonium bromide, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and TritonX-100 (polyethylene glycol octyl phenyl ether).
Further, in the technical scheme, the defoaming agent is an organosilicone defoaming agent.
Further, in the technical scheme, the antioxidant is any one or more of BHT and 168.
Further, according to the technical scheme, the graphene nano silver powder is prepared by a photo-reduction method, and the method comprises the following specific steps:
placing graphene in a photocatalytic reaction tube, adding a hole capture agent into the reaction tube, performing ultrasonic treatment until the hole capture agent is uniformly dispersed, and adding silver nitrate (AgNO)
3) And (3) uniformly mixing the aqueous solution, placing the obtained mixed solution in visible light for illumination reduction reaction for 1-5h, and after the reaction is finished, centrifuging, washing and drying the product to obtain the graphene nano silver powder.
Preferably, in the technical scheme, the usage ratio of the graphene to the silver nitrate to the hole trapping agent is 0.5 parts by mass: 0.8 part by mass: 100 parts by volume, wherein: the mass parts and volume parts are as follows: mL was used as a reference.
Preferably, in the above technical solution, the visible light simulation light source is preferably a xenon lamp, the power of the xenon lamp is 600-1000W, and the wavelength λ is greater than 380 nm.
Preferably, in the above-mentioned technical means, the hole trapping agent is any one of methanol, ethanol, formic acid and the like, and ethanol is more preferable.
Preferably, in the above technical scheme, the drying manner is preferably vacuum drying, and the drying time is 10-30 h.
The second purpose of the present invention is to provide a preparation method of the graphene nano silver composite conductive ink, which comprises the following steps:
the first step is as follows: sequentially adding resin and an organic solvent into a high-speed shearing dispersion machine, and carrying out high-speed shearing dispersion for 20-40min to obtain a first solution;
the second step is that: slowly adding the graphene nano-silver powder into the first solution obtained in the first step, continuously shearing and dispersing at a high speed for 30-60min, sequentially adding a dispersing agent, a defoaming agent and an antioxidant, and continuously stirring for 20-40 min;
the third step: and (3) continuing ultrasonic dispersion treatment on the mixture obtained in the second step for 2-4h, then performing dispersion treatment by using a three-roll grinder, and grinding the mixture for multiple times by using the three-roll grinder to form uniform slurry, thus finally obtaining the graphene nano-silver composite conductive ink.
Further, in the above technical scheme, the high-speed shearing dispersion refers to dispersion performed under the condition that the rotating speed of the dispersion machine is not lower than 1000 r/min.
Compared with the prior art, the invention has the following beneficial effects:
(1) compared with the prior art, when the graphene nano-silver conductive ink prepared by the invention is used as a conductive agent, conductive nano-silver particles are well loaded on a graphene sheet, the graphene sheet is stable in structure and not easy to fall off, and meanwhile, the graphene nano-silver conductive ink also serves as nodes of a conductive network, so that the number of conductive network passages is increased, the conductive network of graphene can be assisted and perfected, the number of conductive particles in unit volume is increased, the conductivity is high, and the resistivity is low;
(2) the graphene nano-silver composite conductive ink prepared by the method has good printability, and the printed ink layer has the advantages of low resistivity, stable conductivity, good conductivity and the like, and has wide market application prospect;
(3) according to the preparation method of the graphene nano-silver composite conductive ink, provided by the invention, Ag is treated by graphene nano-silver powder by a photo-reduction method
+Reducing, under the irradiation of xenon lamp, the silver nano particles generate local surface plasma resonance effect to promote Ag
+The silver is highly reduced into simple substance silver, the adding amount of the silver powder is reduced, and the preparation method has simple steps, low cost and easy operation;
(4) the graphene nano-silver composite conductive ink prepared by the preparation method disclosed by the invention is strong in adhesive force and high in hardness.
Detailed Description
The present invention will be described in further detail below with reference to examples. The present invention is implemented on the premise of the technology of the present invention, and the detailed embodiments and specific procedures are given to illustrate the inventive aspects of the present invention, but the scope of the present invention is not limited to the following embodiments.
Various modifications to the precise description of the invention will be readily apparent to those skilled in the art from the information contained herein without departing from the spirit and scope of the appended claims. It is to be understood that the scope of the invention is not limited to the procedures, properties, or components defined, as these embodiments, as well as others described, are intended to be merely illustrative of particular aspects of the invention. Indeed, various modifications of the embodiments of the invention which are obvious to those skilled in the art or related fields are intended to be covered by the scope of the appended claims.
For a better understanding of the invention, and not as a limitation on the scope thereof, all numbers expressing quantities, percentages, and other numerical values used in this application are to be understood as being modified in all instances by the term "about". Accordingly, unless expressly indicated otherwise, the numerical parameters set forth in the specification and attached claims are approximations that may vary depending upon the desired properties sought to be obtained. At the very least, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques.
The materials, reagents and the like used in the following examples are commercially available without specific description, and the resins used therein are all conventional reagents and are not limited by the manufacturer.
Example 1
The graphene nano-silver composite conductive ink of the embodiment comprises 10 parts of epoxy resin, 10 parts of graphene nano-silver powder, 10 parts of ethanol, 1 part of polyvinyl alcohol, 1 part of polydimethylsiloxane and 1 part of antioxidant BHT.
The graphene nano-silver composite conductive ink is prepared by the following method, and comprises the following steps:
step 1: preparing graphene nano silver powder:
placing 0.5g of graphene in a photocatalytic reaction tube, sequentially adding 100mL of ethanol, performing ultrasonic treatment until the graphene is dispersed, and then adding AgNO
3Aqueous solution (with silver nitrate content 0.8 g). And (2) reacting for 2h under the irradiation of a 800W xenon lamp, centrifuging the solution after the 2h illumination reaction, washing with deionized water for three times, then drying the obtained product in vacuum at 60 ℃ for 20h, and collecting the dried sample to obtain the graphene nano silver powder.
Step 2: preparing graphene nano-silver composite conductive ink:
firstly, shearing and dispersing 10 parts of epoxy resin and 10 parts of ethanol in a high-speed shearing dispersion machine at a high speed of 1000r/min for 30min to obtain a first solution;
secondly, slowly adding 10 parts of the graphene nano silver powder obtained in the step 1 into the first solution, shearing and dispersing at a high speed of 1000r/min for 30min in a high-speed shearing dispersion machine, sequentially adding 1 part of polyvinyl alcohol, 1 part of polydimethylsiloxane and 1 parts of antioxidant BHT, and continuously stirring for 30 min;
and thirdly, continuing ultrasonic dispersion treatment on the mixture obtained in the second step for 2 hours, then performing dispersion treatment by using a three-roll grinder, and grinding the mixture for 4 times by using the three-roll grinder to form uniform slurry, thereby finally obtaining the graphene nano-silver composite conductive ink.
Example 2
The graphene nano-silver composite conductive ink comprises 17 parts of polyester resin, 15 parts of graphene nano-silver powder, 17 parts of propylene glycol, 2 parts of polyvinylpyrrolidone, 2 parts of polydimethylsiloxane and 1682 parts of antioxidant.
The graphene nano-silver composite conductive ink is prepared by the following method, and comprises the following steps:
step 1: preparing graphene nano silver powder:
placing 0.5g of graphene in a photocatalytic reaction tube, sequentially adding 100mL of ethanol, performing ultrasonic treatment until the graphene is dispersed, and then adding AgNO
3Aqueous solution (with silver nitrate content 0.8 g). And (2) reacting for 2h under the irradiation of a 800W xenon lamp, centrifuging the solution after the 2h illumination reaction, washing with deionized water for three times, then drying the obtained product in vacuum at 60 ℃ for 20h, and collecting the dried sample to obtain the graphene nano silver powder.
Step 2: preparing graphene nano-silver composite conductive ink:
firstly, shearing and dispersing 17 parts of polyester resin and 17 parts of propylene glycol at a high speed of 1000r/min for 30min in a high-speed shearing dispersion machine to obtain a first solution;
secondly, slowly adding 15 parts of the graphene nano silver powder obtained in the step 1 into the first solution, carrying out high-speed shearing dispersion at a speed of 1000r/min for 50min in a high-speed shearing dispersion machine, sequentially adding 2 parts of polyvinylpyrrolidone, 2 parts of polydimethylsiloxane and 1682 parts of antioxidant, and continuously stirring for 30 min;
and thirdly, continuing ultrasonic dispersion treatment on the mixture obtained in the second step for 3 hours, then performing dispersion treatment by using a three-roll grinder, and grinding the mixture for 4 times by using the three-roll grinder to form uniform slurry to finally obtain the composite conductive ink.
Example 3
The graphene nano-silver composite conductive ink of the embodiment comprises 20 parts of fluorocarbon resin, 20 parts of graphene nano-silver powder, 20 parts of ethyl formate, 3 parts of sodium carboxymethyl cellulose, 3 parts of polydimethylsiloxane and 3 parts of antioxidant, wherein: the antioxidant consists of antioxidant BHT and antioxidant 168 in a mass ratio of 1: 1.
The graphene nano-silver composite conductive ink is prepared by the following method, and comprises the following steps:
step 1: preparing graphene nano silver powder:
placing 0.5g of graphene in a photocatalytic reaction tube, sequentially adding 100mL of ethanol, performing ultrasonic treatment until the graphene is dispersed, and then adding AgNO
3Aqueous solution (with silver nitrate content 0.8 g). And (2) reacting for 2h under the irradiation of a 800W xenon lamp, centrifuging the solution after the 2h illumination reaction, washing with deionized water for three times, then drying the obtained product in vacuum at 60 ℃ for 20h, and collecting the dried sample to obtain the graphene nano silver powder.
Step 2: preparing graphene nano-silver composite conductive ink:
firstly, 20 parts of fluorocarbon resin and 20 parts of ethyl formate are subjected to high-speed shearing dispersion for 30min at a speed of 1000r/min in a high-speed shearing dispersion machine to obtain a first solution;
secondly, slowly adding 20 parts of the graphene nano silver powder obtained in the step 1 into the first solution, carrying out high-speed shearing dispersion for 60min at a speed of 1000r/min in a high-speed shearing dispersion machine, sequentially adding 3 parts of sodium carboxymethylcellulose, 3 parts of polydimethylsiloxane and 3 parts of antioxidant (BHT: 168 is mixed according to a mass ratio of 1: 1), and continuously stirring for 30 min;
and thirdly, continuing ultrasonic dispersion treatment on the mixture obtained in the second step for 3 hours, then performing dispersion treatment by using a three-roll grinder, and grinding the mixture for 4 times by using the three-roll grinder to form uniform slurry, thus finally obtaining the graphene nano-silver composite conductive ink.
Example 4
The graphene nano-silver composite conductive ink comprises 12 parts of phenolic resin, 12 parts of graphene nano-silver powder, 12 parts of isopropanol, 1.5 parts of hexadecyl ammonium bromide, 1.5 parts of polydimethylsiloxane and 1681.5 parts of antioxidant.
The graphene nano-silver composite conductive ink is prepared by the following method, and comprises the following steps:
step 1: preparing graphene nano silver powder:
0.5g of graphene was exposed to lightIn the catalytic reaction tube, 100mL of ethanol is sequentially added, ultrasonic treatment is carried out until the ethanol is dispersed, and AgNO is added
3Aqueous solution (with silver nitrate content 0.8 g). And (2) reacting for 2h under the irradiation of a 800W xenon lamp, centrifuging the solution after the 2h illumination reaction, washing with deionized water for three times, then drying the obtained product in vacuum at 60 ℃ for 20h, and collecting the dried sample to obtain the graphene nano silver powder.
Step 2: preparing graphene nano-silver composite conductive ink:
firstly, shearing and dispersing 12 parts of phenolic resin and 12 parts of isopropanol at a high speed of 1000r/min for 30min in a high-speed shearing dispersion machine to obtain a first solution;
secondly, slowly adding 12 parts of the graphene nano silver powder obtained in the step 1 into the first solution, carrying out high-speed shearing dispersion at a speed of 1000r/min for 50min in a high-speed shearing dispersion machine, sequentially adding 1.5 parts of hexadecyl ammonium bromide, 1.5 parts of polydimethylsiloxane and 1681.5 parts of antioxidant, and continuously stirring for 30 min;
and thirdly, continuing ultrasonic dispersion treatment on the mixture obtained in the second step for 3 hours, then performing dispersion treatment by using a three-roll grinder, and grinding the mixture for 4 times by using the three-roll grinder to form uniform slurry, thus finally obtaining the graphene nano-silver composite conductive ink.
Example 5
The graphene nano-silver composite conductive ink comprises 12 parts of acrylic resin, 15 parts of graphene nano-silver powder, 18 parts of ethyl acetate, 1.5 parts of sodium dodecyl sulfate, 2 parts of polydimethylsiloxane and 1682.5 parts of antioxidant.
The graphene nano-silver composite conductive ink is prepared by the following method, and comprises the following steps:
step 1: preparing graphene nano silver powder:
placing 0.5g of graphene in a photocatalytic reaction tube, sequentially adding 100mL of ethanol, performing ultrasonic treatment until the graphene is dispersed, and then adding AgNO
3Aqueous solution (with silver nitrate content 0.8 g). Reacting for 2h under the irradiation of a 800W xenon lamp, centrifuging the solution after the 2h illumination reaction, washing with deionized water for three times, and then vacuum-drying the obtained product at 60 DEG CAnd drying for 20h, and collecting a dried sample to obtain the graphene nano silver powder.
Step 2: preparing graphene nano-silver composite conductive ink:
firstly, shearing and dispersing 12 parts of acrylic resin and 18 parts of ethyl acetate at a high speed of 1000r/min for 30min in a high-speed shearing dispersion machine to obtain a first solution;
secondly, slowly adding 15 parts of the graphene nano silver powder obtained in the step 1 into the first solution, carrying out high-speed shearing dispersion at a speed of 1000r/min for 50min in a high-speed shearing dispersion machine, sequentially adding 1.5 parts of sodium dodecyl sulfate, 2 parts of polydimethylsiloxane and 1682.5 parts of antioxidant, and continuously stirring for 30 min;
and thirdly, continuing ultrasonic dispersion treatment on the mixture obtained in the second step for 3 hours, then performing dispersion treatment by using a three-roll grinder, and grinding the mixture for 4 times by using the three-roll grinder to form uniform slurry, thus finally obtaining the graphene nano-silver composite conductive ink.
Example 6
The graphene nano-silver composite conductive ink comprises 16 parts of polyamide resin, 15 parts of graphene nano-silver powder, 18 parts of ethyl formate, 1001.5 parts of Triton X-1001.5 parts, 2.5 parts of polydimethylsiloxane and 3 parts of antioxidant BHT.
The graphene nano-silver composite conductive ink is prepared by the following method, and comprises the following steps:
step 1: preparing graphene nano silver powder:
placing 0.5g of graphene in a photocatalytic reaction tube, sequentially adding 100mL of ethanol, performing ultrasonic treatment until the graphene is dispersed, and adding AgNO
3Aqueous solution (with silver nitrate content 0.8 g). And (2) reacting for 2h under the irradiation of a 800W xenon lamp, centrifuging the solution after the 2h illumination reaction, washing with deionized water for three times, then drying the obtained product in vacuum at 60 ℃ for 20h, and collecting the dried sample to obtain the graphene nano silver powder.
Step 2: preparing graphene nano-silver composite conductive ink:
firstly, 16 parts of polyamide resin and 18 parts of ethyl formate are subjected to high-speed shearing dispersion for 30min at a speed of 1000r/min in a high-speed shearing dispersion machine to obtain a first solution;
secondly, slowly adding 15 parts of the graphene nano silver powder obtained in the step 1 into the first solution, performing high-speed shearing dispersion at a speed of 1000r/min for 50min in a high-speed shearing dispersion machine, sequentially adding Triton X-1001.5 parts, 2.5 parts of polydimethylsiloxane and 3 parts of antioxidant BHT, and continuously stirring for 30 min;
and thirdly, continuing ultrasonic dispersion treatment on the mixture obtained in the second step for 3 hours, then performing dispersion treatment by using a three-roll grinder, and grinding the mixture for 4 times by using the three-roll grinder to form uniform slurry, thus finally obtaining the graphene nano-silver composite conductive ink.
And (3) performance testing:
the graphene nano silver composite conductive ink prepared in the above embodiments 1, 2 and 3 is screen-printed by using a PET plastic film as a substrate and using a 200-mesh screen printing plate, and is dried and cured for 30min under a certain condition, so that a composite conductive ink film with a thickness of 10um is finally obtained. The hardness of the pencil is tested by using a Chinese pencil according to the national standard GB/T6739-1996, and the hardness is 4H; according to the national standard GB/T13217.4-2008, the adhesive force is tested by using a 3M special adhesive tape, and the adhesive force is 100 percent; the viscosity of the ink is measured by GB/T13217.4-2008; measuring the resistivity of the conductive ink by using a high insulation resistance measuring instrument (a universal meter ZC36 type); the tensile strength and the elongation at break of the sample were measured by an electronic universal material tester, and the test results are shown in table 1 below.
Table 1 table of performance test results of graphene nano-silver composite conductive inks prepared in examples 1 to 3
As shown in Table 1, the graphene nano-silver composite conductive ink prepared in examples 1 to 3 has viscosity of 2450-2550mPa & s, hardness of 4H, and resistivity of 0.15-0.23 Ω & cm
-1The tensile strength is 17.2-18.5MPa, the elongation at break is 187.9-198.7%, and the result shows that the graphene nano-silver composite conductive ink prepared by the method has the advantages of good electrical conductivity, high hardness, strong adhesive force and comprehensive mechanical propertyThe combination property is excellent.
Claims (10)
1. The graphene nano-silver composite conductive ink is characterized in that: the graphene nano silver powder coating comprises, by weight, 10-20 parts of resin, 10-20 parts of graphene nano silver powder, 10-20 parts of an organic solvent, 1-3 parts of a dispersing agent, 1-3 parts of a defoaming agent and 1-3 parts of an antioxidant.
2. The graphene nano-silver composite conductive ink according to claim 1, characterized in that: the resin comprises any one or more of epoxy resin, phenolic resin, polyester resin, fluorocarbon resin, acrylic resin, polyamide resin and polyurethane resin.
3. The graphene nano-silver composite conductive ink according to claim 1, characterized in that: the organic solvent comprises any one or more of ethanol, isopropanol, propylene glycol, ethyl formate and ethyl acetate.
4. The graphene nano-silver composite conductive ink according to claim 1, characterized in that: the dispersing agent is any one of polyvinyl alcohol, polyethylene glycol, polyvinylpyrrolidone, styrene butadiene rubber, sodium carboxymethyl cellulose, hexadecyl ammonium bromide, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and Triton X-100.
5. The graphene nano-silver composite conductive ink according to claim 1, characterized in that: the defoaming agent is an organosiloxane defoaming agent.
6. The graphene nano-silver composite conductive ink according to claim 1, characterized in that: the antioxidant is any one or more of BHT and 168.
7. The graphene nano-silver composite conductive ink according to claim 1, characterized in that: the graphene nano silver powder is prepared by a photo-reduction method, and the method comprises the following specific steps:
placing graphene in a photocatalytic reaction tube, adding a hole capture agent into the reaction tube, performing ultrasonic treatment until the hole capture agent is uniformly dispersed, adding a silver nitrate aqueous solution, uniformly mixing, placing the obtained mixed solution in visible light for a reduction reaction for 1-5 hours, and after the reaction is finished, centrifuging, washing and drying the product to obtain the graphene nano silver powder.
8. The graphene nanosilver composite conductive ink of claim 7, wherein: the using amount ratio of the graphene to the silver nitrate to the hole trapping agent is 0.5 part by mass: 0.8 part by mass: 100 parts by volume, wherein: the mass parts and volume parts are as follows: mL was used as a reference.
9. The graphene nanosilver composite conductive ink of claim 7, wherein: the hole trapping agent is any one of methanol, ethanol and formic acid.
10. The preparation method of the graphene nano-silver composite conductive ink according to claim 1, characterized by comprising the following steps: the method comprises the following steps:
the first step is as follows: sequentially adding resin and an organic solvent into a high-speed shearing dispersion machine, and carrying out high-speed shearing dispersion for 20-40min to obtain a first solution;
the second step is that: slowly adding the graphene nano-silver powder into the first solution obtained in the first step, continuously shearing and dispersing at a high speed for 30-60min, sequentially adding a dispersing agent, a defoaming agent and an antioxidant, and continuously stirring for 20-40 min;
the third step: and (3) continuing ultrasonic dispersion treatment on the mixture obtained in the second step for 2-4h, then performing dispersion treatment by using a three-roll grinder, and grinding the mixture for multiple times by using the three-roll grinder to form uniform slurry, thus finally obtaining the graphene nano-silver composite conductive ink.
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| CN112375432A (en) * | 2020-11-17 | 2021-02-19 | 安徽理工大学 | Carbon nanotube nano-silver conductive ink |
| CN112778823A (en) * | 2021-01-27 | 2021-05-11 | 九江纳维新材料科技有限公司 | Ultra-high conductivity electronic grade graphene-silver composite conductive UV curing ink and preparation method and application thereof |
| CN113045936A (en) * | 2021-04-26 | 2021-06-29 | 滁州金桥德克新材料有限公司无锡分公司 | Conductive ink composition for radio frequency identification |
| CN114574041A (en) * | 2022-04-15 | 2022-06-03 | 云南巨晶新材料有限公司 | Conductive ink capable of being sprayed with nano-silver graphene |
| CN116219773A (en) * | 2022-12-01 | 2023-06-06 | 青岛大学 | Method for improving fixation fastness of nano silver/reduced graphene oxide UV printing ink |
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