CN106867315B - Preparation method and application of conductive ink based on metal nanowires and graphene oxide - Google Patents
Preparation method and application of conductive ink based on metal nanowires and graphene oxide 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
- C09D11/00—Inks
- C09D11/52—Electrically conductive inks
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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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- H05K1/02—Details
- H05K1/09—Use of materials for the conductive, e.g. metallic pattern
- H05K1/092—Dispersed materials, e.g. conductive pastes or inks
- H05K1/097—Inks comprising nanoparticles and specially adapted for being sintered at low temperature
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Abstract
The invention provides a preparation method and application of conductive ink based on metal nanowires and graphene oxide. The obtained ink can be directly written or printed on various substrate materials to construct a conductive circuit with high conductivity, stability, flexibility and strong adhesion; the constructed conductive circuit can reach high conductivity after being dried for 3-10 minutes at room temperature; the conductive circuit can be further improved in conductivity by selecting a sintering temperature of 50-200 ℃, or chemical reduction at room temperature, or processing by using methods such as xenon flash lamp sintering and the like to reduce graphene oxide and sinter the metal nanowires.
Description
Technical Field
The invention belongs to the technical field of nano materials, conductive ink and printed electronic products, and particularly relates to a preparation method of aqueous conductive ink based on metal nanowires and graphene oxide and capable of being directly written, printed and a construction method of a conductive circuit based on the aqueous conductive ink; the method is mainly applied to the construction of flexible and foldable electronic circuits and devices, leads of the circuits, repair circuits and the like.
Background
In recent years, electronic products are increasingly miniaturized, flexible and wearable. The characteristics of light weight, integration and the like of the novel electronic device also provide higher requirements for the preparation process of the device: low cost, environmental protection, no pollution, cyclic utilization, simple preparation, short production period, large-scale production and the like. Photolithography is the most common method for preparing conductive patterns in traditional flexible microelectronic products, but the method is complicated in process, time-consuming, high in cost and has certain pollution to the environment. The novel electronic printing technology comprises the processes of screen printing, gravure printing, ink jet printing and the like, is simple and short in period, and provides possibility for large-scale preparation of conductive patterns in flexible devices. In addition to the conventional circuit printing method, the conductive ink is directly written on the substrate through a straight line to perform rapid circuit preparation, and the method is a simple and rapid circuit preparation method.
The core of the printing and direct-writing circuit preparation process is the preparation of suitable conductive ink. At present, most of the conductive components in the conductive ink are metal nanoparticles or micron sheets, for example, chinese patent document CN 101710497B discloses a nano silver conductive paste dispersed in cellulose, a conductive pattern obtained by applying the nano silver conductive paste by printing or the like, and the resistivity after sintering treatment at 250 ℃ is 10-5Omega cm, but the solid content of silver in the ink is higher, 10-70%, and the required sintering temperature is high; chinese patent document CN 104817891A discloses a method for preparing a directly writable conductive ink, in which silver nanoparticles coated with an anionic surfactant on the surface are dispersed in additives such as ethyl cellulose to obtain the conductive ink, the solid content of the silver nanoparticles is 5% to 60%, the sintering temperature is low, but a long sintering time is required, and the conductivity of the written conductive circuit is not ideal after being dried, and the resistance value of 1cm is hundreds of ohms. The metal nano-particle and micron-sheet ink usually needs more than 50% of metal solid content to obtain ideal conductivity, needs very high sintering temperature in the later period, is easy to break a conductive layer when being bent, and is difficult to realize the requirements of a wearable flexible circuit on folding, bending and the like.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a preparation method of the aqueous conductive ink which is low in metal solid content, free of sintering, environment-friendly and pollution-free and can be used for directly writing and printing, wherein graphene oxide is simultaneously used as a dispersing agent, a thickening agent, a stabilizing agent, an antioxidant, a mechanical property reinforcing agent and the like, and metal nanowires are used as a conductive additive. By screen printing, slot-type extrusion coating, gravure printing or flexographic printing or by filling ink into the refillThe conductive pattern can be directly written by a PEN, and the circuit or the conductive pattern can be prepared on a substrate such as glass, paper, polyethylene naphthalate (PEN), Polyimide (PI), Polycarbonate (PET) and the like. The circuit or pattern can be dried for several minutes at room temperature to obtain excellent conductivity (10)4Of the order of S/cm or more). The conductive pattern written or printed on the flexible substrate shows good resistance to mechanical deformation such as bending and folding after being dried.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a directly writable or printable conductive ink based on metal nanowires and graphene oxide, characterized in that: the conductive ink comprises the following components in percentage by mass:
i. 1.0-15.0% of metal nanowires;
0.2-2% of monolayer or oligo-layer graphene oxide;
0-5% of auxiliary dispersant;
thickener, 0-5%;
v. surfactant, 0.05-2%;
vi, defoamer, 0.05-2%;
deionized water and organic alcohol solvent, 69.0-0-98.7%.
Further, the metal nanowire refers to one of gold, silver, copper, nickel, platinum, palladium and aluminum metal nanowires, or an alloy of two or more of the metal nanowires; the diameter of the metal nanowire is 10-200 nanometers, and the length of the metal nanowire is 5-150 micrometers.
Furthermore, the single-layer or few-layer graphene oxide is a two-dimensional plane material which is composed of single-layer graphene atoms with hexagonal lattice arrangement on a molecular framework, contains a large number of organic oxygen-containing functional groups including hydroxyl, carboxyl, epoxy and carbonyl, and has the size of a single-chip area of 1um2To 100um2The thickness is between 0.3 and 5nm, and the preparation method adopts a chemical oxidation method.
Further, the dispersion aid is polyvinylpyrrolidone (PVP), sodium dodecyl sulfate, hydroxypropyl methylcellulose, ethyl cellulose, hydroxyethyl cellulose, and
in Gen series dispersant
Gen 0451、
Gen 1251、
Gen 0755、
One or more of Gen 1051.
Further, the thickener is
3517、
Ethyl cellulose, hydroxypropyl methylcellulose, Propylene Glycol Monomethyl Ether (PGME),
Rheo 8510、
Rheo 8500、
Rheo 8600、
RHEO 8510、
R、
ViscoPlus 3000、
One or more of ViscoPlus 3010 thickening agents, or
In Gel series thickening agent
PW 25、
Gel 0435、
Gel 0434、
One or more of Gel 0626.
Further, the surfactant is FC4430,
FS series fluorocarbon surfactant
FS-30、
FC series fluorocarbon surfactant
FC-300、
FSE、
N321、
N323、
One or more of TM fluorocarbon surfactants.
Further, the defoaming agent is
LA200、
A10, BASFFoamstar MO2170, BYK-028, BYK-019, BYK-024, Dow Corning DC65, Hamming modesty W-082, Hamming modesty W-086, and Legia DF 5800C.
Further, the organic alcohol solvent is one or more of methanol, ethanol, isopropanol, propanol, glycerol, cyclohexanol, ethylene glycol, glycerol, diethylene glycol, triethylene glycol, n-butanol, and terpineol.
A preparation method of a conductive ink based on metal nanowires and graphene oxide and capable of being directly written or printed is characterized by comprising the following steps:
(1) weighing a certain amount of graphene oxide prepared by a chemical oxidation method, adding a certain amount of deionized water, and performing ultrasonic dispersion to obtain a graphene oxide dispersion liquid;
(2) adding a certain amount of metal nanowires into the graphene oxide dispersion liquid obtained in the step (1), performing ultrasonic oscillation to uniformly disperse the metal nanowires, collecting a compound of graphene oxide and the metal nanowires by a method such as microfiltration membrane suction filtration or high-speed centrifugation, and washing the compound with deionized water for multiple times;
(3) preparing an additive solution containing a dispersing agent, a thickening agent, a surfactant, a defoaming agent, deionized water and an organic alcohol solvent;
(4) re-dispersing the obtained graphene oxide-metal nanowire compound in the solution containing various additives obtained in the step (3), and performing ultrasonic and oscillation dispersion to obtain conductive ink with good dispersibility;
wherein the components and the mass percentage are as follows:
i. 1.0-15.0% of metal nanowires;
0.2-2% of monolayer or oligo-layer graphene oxide;
0-5% of auxiliary dispersant;
thickener, 0-5%;
v. surfactant, 0.05-2%;
vi, defoamer, 0.05-2%;
deionized water and organic alcohol solvent, 69.0-0-98.7%.
The application of the conductive ink based on the metal nanowires and the graphene oxide, which can be directly written or printed, is characterized in that the conductive ink is used for constructing a conductive circuit, the conductive ink is filled into an ink pen core of a ball pen, a gel pen, a water-based pen or a fountain pen, patterns are written on a hard or flexible substrate in a direct writing mode, and the metal nanowires-graphene oxide conductive electrode circuit is obtained by drying; and constructing patterns on paper and a hard or flexible substrate by using the conductive ink in coating printing modes such as screen printing, ink-jet printing, slit extrusion coating, gravure printing or flexographic printing, and the like, and drying to obtain the metal nanowire-graphene oxide conductive electrode circuit.
Furthermore, the diameter of the pen point of the ball-point pen or the gel pen is 250-1500 microns.
Furthermore, the hard substrate comprises glass, quartz glass, silicon dioxide, ceramic, aluminum nitride, a glass fiber epoxy resin laminated plate, a copper-clad plate and the like; the flexible substrate comprises printing paper, coated paper, offset paper, embossed paper, intaglio paper, white paper, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), Polyimide (PI), polycarbonate and polyether ketone.
Further, the method also comprises the following steps:
(1) drying at room temperature for 3-15 min; or further selecting the roasting temperature of 50-200 ℃ and the roasting time of 1-30 minutes, and roasting and sintering the patterns on the substrate to improve the conductivity of the printed circuit;
(2) and selecting a chemical reagent comprising hydrazine, hydrogen bromide, sodium borohydride, ammonia water or a xenon flash lamp to perform chemical reduction on the electrode pattern on the substrate so as to further improve the conductivity of the printed circuit.
Compared with the prior art, the invention has the following advantages:
(1) the invention discloses a conductive ink capable of being directly written and printed, which is simple in preparation method and easy to operate. The conductive circuit or the pattern is constructed by direct writing or printing, a complex instrument is not needed, the cost is low, and the large-scale use is convenient.
(2) The invention uses the metal nano wire with large length-diameter ratio as the conductive component, and can obtain high conductivity only by lower conductive substance content, thereby greatly reducing the production cost. The permeable network formed by the metal nanowires and the graphene oxide greatly improves the bendable and foldable performance of the written or printed conductive pattern.
(3) According to the invention, graphene oxide is used as a thickening agent, a dispersing agent, an antioxidant, a stabilizer, a mechanical property reinforcing agent and the like for the first time, and the metal nanowires can be dispersed by only a small amount of graphene oxide, so that uniform ink with good dispersibility is obtained, the content of an insulating additive is greatly reduced, and the high conductivity is achieved. In addition, the graphene oxide is wrapped on the metal nanowires, so that the metal nanowires are isolated from being contacted with air, an anti-oxidation effect is achieved, the occurrence of the direct-writing or printing conductive patterns in the oxidation process of the air can be greatly reduced, and the stability of the conductive patterns is improved.
(4) The ink contains various different additives, and the ink with physical parameters suitable for direct writing or printing on various substrates such as paper, polyethylene glycol terephthalate (PEN), Polyimide (PI), polycarbonate and the like can be obtained by regulating the content of the additives, so that the application range of the ink is greatly expanded.
(5) The conductive circuit or pattern obtained by direct writing or printing of the ink disclosed by the invention does not need high-temperature sintering, and can recover good conductivity after being dried for several minutes at room temperature of 20 ℃, taking the conductive ink of silver nanowires and graphene oxide as an example, the conductive ink is dried for 5 minutes at the temperature of 20 ℃, and the resistivity of the conductive ink is as high as 2.3 × 104S/cm, and the subsequent reduction treatment by adopting a reducing agent or a xenon flash lamp can further improve the conductivity of the alloy. High sintering temperature relative to conventional conductive inksAnd the method has wider application in the field of flexible electronic devices.
Drawings
Fig. 1 is a scanning electron microscope image of a conductive line written on a commercially available a4 paper by pouring the silver nanowire/graphene oxide conductive ink obtained in example 1 into a 0.8mm gel ink cartridge.
Fig. 2 is a scanning electron microscope image of a conductive line written on a Polycarbonate (PET) substrate by pouring the silver nanowire/graphene oxide conductive ink obtained in example 2 into a 1.0mm gel ink cartridge.
Fig. 3 is a scanning electron microscope image of a conductive line written on a glass substrate by pouring the silver nanowire/graphene oxide conductive ink obtained in example 2 into a 1.0mm gel ink cartridge.
Fig. 4 is a rheological characteristic curve of the silver nanowire/graphene oxide conductive ink obtained in example 2. The left graph is the change curve of the ink viscosity along with different shearing forces; the right graph shows the time-dependent change of the ink viscosity, which is first applied for 0.1s-1The shear rate was maintained for 30s and then increased to 100s-1Keeping for 30s, and recovering to 0.1s-1Hold 100s to simulate the process of applying shear force to the ink by the nib ball during writing.
Detailed Description
Example 1:
(1) weighing 0.16g of chemically prepared graphene oxide, placing the graphene oxide in a beaker, adding 80ml of deionized water, carrying out ultrasonic treatment for 30 minutes to obtain 2mg/ml graphene oxide dispersion liquid, and using 1 mol/L NaHCO3The solution was adjusted to 6.5 pH of the graphene oxide dispersion.
(2) Weighing 6ml of silver nanowire dispersion liquid (10mg/ml) into a reagent bottle, adding 10mg of graphene oxide dispersion liquid obtained in the step (1), mixing the two solutions, performing coagulation, performing suction filtration by using a microporous filter membrane, and cleaning for several times by using deionized water to obtain a compound of silver nanowires and graphene oxide.
(3) 0.1g of auxiliary dispersant PVP and 0.02g of defoaming agent BYK-028 are weighed in a beaker, 9.88g of deionized water is added, and ultrasonic dispersion is carried out to obtain an additive solution.
(4) And (3) dispersing the compound of the silver nanowires and the graphene oxide in 1.5ml of the additive prepared in the step (3), and performing ultrasonic treatment and oscillation to obtain a uniform solution.
(5) And (3) filling the conductive ink obtained in the step (4) into a neutral pen core or adopting a printing mode, and directly writing or printing a conductive circuit on printing paper, wherein when the viscosity of the ink is 1-10Pa · s, the writing is smooth, the ink does not stick and leaks, and the point can be seen from a scanning electron microscope image of the writing circuit in the embodiment 1 in the figure 1.
Example 2:
(1) weighing 0.16g of chemically prepared graphene oxide, placing the graphene oxide in a beaker, adding 80ml of deionized water, carrying out ultrasonic treatment for 30 minutes to obtain 2mg/ml graphene oxide dispersion liquid, and using 1 mol/L NaHCO3The solution was adjusted to 6.5 pH of the graphene oxide dispersion.
(2) Weighing 6ml of silver nanowire dispersion liquid (10mg/ml) into a reagent bottle, adding 10mg of graphene oxide dispersion liquid obtained in the step (1), mixing the two solutions, performing coagulation, performing suction filtration by using a microporous filter membrane, and cleaning for several times by using deionized water to obtain a compound of silver nanowires and graphene oxide.
(3) 0.1g of dispersion aid PVP, 0.02g of defoamer BASF foamstar MO2170, 0.05g of surfactant were weighed out
FC-300 was placed in a beaker and 9.83g of deionized water was added and ultrasonically dispersed to give an additive solution.
(4) And (3) dispersing the compound of the silver nanowires and the graphene oxide in 1.5ml of the additive prepared in the step (3), and performing ultrasonic treatment and oscillation to obtain a uniform solution.
(5) And (3) filling the conductive ink obtained in the step (4) into a neutral PEN core or directly writing or printing conductive circuits on various different substrates such as polyethylene glycol naphthalate (PEN), Polyimide (PI), polycarbonate, various types of paper and the like by adopting a printing mode.
The obtained conductive ink is poured into a 1.0mm gel ink refill, and conductive circuits are respectively written on a Polycarbonate (PET) substrate and a glass substrate, and the effect is shown in the scanning electron microscope images of attached figures 2 and 3.
In the rheology curve of the ink of FIG. 4, we can observe a typical shear thinning behavior at a shear rate of 0.1s-1The viscosity of the ink is 3 Pa.s; the shear rate is increased to 100s-1When the viscosity of the ink decreased sharply, the viscosity became 0.03 pa.s; when the shear rate is restored to 0.1s-1The ink viscosity can be quickly restored to near the initial viscosity. The process is used for simulating the process of applying stress to the ink by the steel ball of the ball-point pen point in the writing process, and the ink has higher initial viscosity and is not easy to leak from the pen point; when writing, the steel balls apply shearing force to the ink, and the viscosity of the ink becomes thin, so that the ink can be smoothly written out from a pen point; at the end of writing, the ink regains a greater viscosity and the pattern can be retained.
Example 3:
(1) weighing 0.16g of chemically prepared graphene oxide, placing the graphene oxide in a beaker, adding 80ml of deionized water, carrying out ultrasonic treatment for 30 minutes to obtain 2mg/ml graphene oxide dispersion liquid, and using 1 mol/L NaHCO3The solution was adjusted to 6.5 pH of the graphene oxide dispersion.
(2) Weighing 6ml of silver nanowire dispersion liquid (10mg/ml) into a reagent bottle, adding 5mg of graphene oxide dispersion liquid obtained in the step (1), mixing the two solutions, performing coagulation, performing suction filtration by using a microporous filter membrane, and cleaning for several times by using deionized water to obtain a compound of silver nanowires and graphene oxide.
(3) 0.2g of thickener is weighed out
Gel 0435, 0.1g dispersion aid
Gen 0451, 0.01g of defoaming agent BYK-028, and 0.05g of surfactant
N321 in a beaker, 9.83g of deionized water was added, and ultrasonic dispersion was carried out to obtain an additive solution.
(4) And (3) dispersing the compound of the silver nanowires and the graphene oxide in 1.5ml of the additive prepared in the step (3), and performing ultrasonic treatment and oscillation to obtain a uniform solution.
(5) And (3) filling the conductive ink obtained in the step (4) into a neutral PEN core or directly writing or printing conductive circuits on various different substrates such as polyethylene glycol naphthalate (PEN), Polyimide (PI), polycarbonate, various types of paper and the like by adopting a printing mode.
Example 4:
(1) 0.16g of chemically prepared graphene oxide is weighed and placed in a beaker, 80ml of deionized water is added, ultrasonic treatment is carried out for 30 minutes to obtain 2mg/ml graphene oxide dispersion liquid, and the pH value of the graphene oxide dispersion liquid is adjusted to 6.5 by using 1 mol/L NaHCO3 solution.
(2) Weighing 6ml of silver nanowire dispersion liquid (10mg/ml) into a reagent bottle, adding 3mg of graphene oxide dispersion liquid obtained in the step (1), mixing the two solutions, performing coagulation, and performing ultrasonic treatment to redisperse the dispersion liquid. And (4) carrying out suction filtration by using a microporous filter membrane, and washing by using deionized water for several times to obtain the compound of the silver nanowires and the graphene oxide.
(3) 0.2g of thickener is weighed out
3517 g, 0.03g auxiliary dispersant hydroxypropyl methyl cellulose, 0.01g defoaming agent
A10, 0.05g surfactant
FS-30 is put into a beaker, 9.83g of deionized water is added, and ultrasonic dispersion is carried out to obtain an additive solution.
(4) And (3) dispersing the compound of the silver nanowires and the graphene oxide in 1.5ml of the additive prepared in the step (3), and performing ultrasonic treatment and oscillation to obtain a uniform solution.
(5) And (3) filling the conductive ink obtained in the step (4) into a neutral PEN core or directly writing or printing conductive circuits on various different substrates such as polyethylene glycol naphthalate (PEN), Polyimide (PI), polycarbonate, various types of paper and the like by adopting a printing mode.
The conductive ink is applied to the construction of a conductive circuit, and is filled into an ink pen refill of a ball pen, a gel pen, a water pen or a fountain pen, patterns are written on a hard or flexible substrate in a direct writing mode, and the metal nanowire-graphene oxide conductive electrode circuit is obtained by drying; and constructing patterns on paper and a hard or flexible substrate by using the conductive ink in coating printing modes such as screen printing, ink-jet printing, slit extrusion coating, gravure printing or flexographic printing, and the like, and drying to obtain the metal nanowire-graphene oxide conductive electrode circuit.
The application further comprises the following steps:
(1) drying at room temperature for 3-15 min; or further selecting the roasting temperature of 50-200 ℃ and the roasting time of 1-30 minutes, and roasting and sintering the patterns on the substrate to improve the conductivity of the printed circuit;
(2) and selecting a chemical reagent comprising hydrazine, hydrogen bromide, sodium borohydride, ammonia water or a xenon flash lamp to perform chemical reduction on the electrode pattern on the substrate so as to further improve the conductivity of the printed circuit.
The above embodiments are merely illustrative of the present invention and should not be limited to the disclosure of the embodiments. Specific substances in the product components disclosed in the technical scheme of the invention can be implemented by the invention, and the technical effects are the same as those obtained in the examples, and the examples are not separately illustrated. Therefore, it is intended that all equivalents and modifications which do not depart from the spirit of the invention disclosed herein are deemed to be within the scope of the invention.
Claims (10)
1. A preparation method of conductive ink based on metal nanowires and graphene oxide is characterized by comprising the following steps:
(1) weighing a certain amount of single-layer or few-layer graphene oxide, adding a certain amount of deionized water, and performing ultrasonic dispersion to obtain a single-layer or few-layer graphene oxide dispersion liquid;
(2) adding a certain amount of metal nanowires into the single-layer or few-layer graphene oxide dispersion liquid obtained in the step (1), performing ultrasonic oscillation to uniformly disperse the metal nanowires, collecting a compound of graphene oxide and the metal nanowires by using a microporous filter membrane suction filtration or high-speed centrifugation method, and washing the compound with deionized water for multiple times;
(3) preparing an additive solution containing a dispersion aid, a thickening agent, a surfactant, a defoaming agent, deionized water and an organic alcohol solvent;
(4) re-dispersing the obtained graphene oxide-metal nanowire compound in the solution containing various additives obtained in the step (3), and performing ultrasonic and oscillation dispersion to obtain conductive ink with good dispersibility;
wherein the components and the mass percentage are as follows:
i. 1.0-15.0% of metal nanowires;
0.2-2% of monolayer or oligo-layer graphene oxide;
0-5% of auxiliary dispersant;
thickener, 0-5%;
v. surfactant, 0.05-2%;
vi, defoamer, 0.05-2%;
deionized water and organic alcohol solvent, 69.0-0-98.7%.
2. The method for preparing the conductive ink based on the metal nanowires and the graphene oxide according to claim 1, wherein the method comprises the following steps: the metal nanowire is one of gold, silver, copper, nickel, platinum, palladium and aluminum metal nanowires or an alloy of more than two of gold, silver, copper, nickel, platinum, palladium and aluminum metal; the diameter of the metal nanowire is 10-200 nanometers, and the length of the metal nanowire is 5-150 micrometers.
3. The method for preparing the conductive ink based on the metal nanowires and the graphene oxide according to claim 1, wherein: the auxiliary dispersing agent is one or more of polyvinylpyrrolidone, sodium dodecyl sulfate, hydroxypropyl methylcellulose, ethyl cellulose, hydroxyethyl cellulose, Borchi Gen 0451, Borchi Gen 1251, Borchi Gen 0755 and Borchi Gen 1051.
4. The method for preparing the conductive ink based on the metal nanowires and the graphene oxide according to claim 1, wherein: the thickening agent is one or more of ToyoboVylonal, ethyl cellulose, hydroxypropyl methyl cellulose, propylene glycol monomethyl ether, TEGO Rheo 8510, TEGO Rheo 8500, TEGO Rheo 8600, TEGO Rheeo 8510, THIXCIN R, TEGO ViscoPlus 3000, TEGO ViscoPlus 3010, Borchi PW 25, Borchi Gel 0435, Borchi Gel 0434, Borchi Gel 0626.
5. The method for preparing the conductive ink based on the metal nanowires and the graphene oxide according to claim 1, wherein: the surfactant is one or more of FC4430, Zonyl FS series fluorocarbon surfactants Zonyl FS-30, Zonyl FC series fluorocarbon surfactants Zonyl FC-300, Zonyl FSE, Zonyl N321, Zonyl N323 and Zonyl TM fluorocarbon surfactants.
6. The method for preparing a conductive ink based on metal nanowires and graphene oxide according to claim 1, wherein the antifoaming agent is one or more of Borchi L A200, BASF-FoamStar A10, BASF Foamstar MO2170, BYK-028, BYK-019, BYK-024, Dow Corning DC65, Hamming Squard tiles W-082, Hamming Squard tiles W-086 and Rodiya DF 5800C.
7. The method for preparing the conductive ink based on the metal nanowires and the graphene oxide according to claim 1, wherein: the organic alcohol solvent is one or more of methanol, ethanol, isopropanol, glycerol, cyclohexanol, ethylene glycol, diethylene glycol, triethylene glycol, n-butanol and terpineol.
8. Use of the conductive ink based on metal nanowires and graphene oxide obtained by the method of any one of claims 1 to 7, characterized in that the conductive ink is used for the construction of conductive circuits by filling the conductive ink into ink cartridges of gel pens or water pens, writing patterns on a hard or flexible substrate by direct writing, and drying to obtain metal nanowire-graphene oxide conductive electrode circuits, or constructing patterns on a hard or flexible substrate by screen printing of the conductive ink, and drying to obtain metal nanowire-graphene oxide conductive electrode circuits.
9. Use of the conductive ink based on metal nanowires and graphene oxide according to claim 8, characterized in that: the hard substrate is a glass, silicon dioxide, ceramic, aluminum nitride, glass fiber epoxy resin laminated plate or copper clad plate; the flexible substrate is coated paperboard, offset paper, embossed paper, intaglio paper, white paper, polyethylene terephthalate, polyethylene naphthalate, polyimide, polycarbonate and polyether ketone.
10. Use of the conductive ink based on metal nanowires and graphene oxide according to claim 8, characterized by further comprising the steps of:
(1) drying at room temperature for 3-15 min; or further selecting 50-200oC, roasting for 1-30 minutes at the roasting temperature, and roasting and sintering the patterns on the substrate to improve the conductivity of the printed circuit;
(2) selecting a chemical reagent to carry out chemical reduction on the electrode pattern on the substrate so as to further improve the conductivity of the printed circuit, or reducing the electrode pattern on the substrate by using a xenon flash lamp so as to further improve the conductivity of the printed circuit; the chemical reagent is hydrazine, hydrogen bromide, sodium borohydride or ammonia water.
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