CN110922895A - Preparation process of conductive chemical coating liquid and preparation method of electric conductor - Google Patents
Preparation process of conductive chemical coating liquid and preparation method of electric conductor Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0806—Silver
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
A preparation method of conductive chemical coating liquid and electric conductor, its preparation method of conductive chemical coating liquid is, add the macromolecule resin into solvent, heat and stir and dissolve, it is component A; adding the metal organic matter into a solvent, heating, stirring and dissolving to obtain a component B; mixing silver nanoparticle powder and micro-nano silver flake powder, adding ethanol, and performing ultrasonic treatment by using ultrasonic equipment; centrifuging immediately after the ultrasonic treatment is finished; adding the obtained wet micro-nano silver powder into the component B, and performing sanding treatment after dispersion to obtain a component C; mixing the component C, the component A and the component B to obtain a conductive chemical coating liquid; the metal organic matter is M-X1‑R‑X2(ii) a The preparation method of the electric conductor comprises the steps of immersing the conductive base material into a chemical coating liquid, taking out the chemical coating liquid, and volatilizing a solvent; and baking to form the conductive coating. The invention solves the problem of nano particle agglomeration and can realize cold welding and sintering of micro-nano silver powder; the resistivity of the coating can reach silver2-4 times of the powder body, and has good shielding effect.
Description
Technical Field
The invention relates to the technical field of conductive coating liquid, in particular to a preparation process of conductive chemical coating liquid and a preparation method of a conductor.
Background
The traditional method for manufacturing the high-conductivity conductive cloth or the conductive sponge is to soak or coat a conductive coating on a base material (the base material needs to be subjected to conductive treatment to carry out subsequent electroplating, otherwise, electroplating cannot be carried out) in an electroplating mode, and then electroplating is carried out to improve the thickness and the conductivity of the conductive layer in the cloth or the sponge, however, the waste liquid containing heavy metal generated by electroplating has great pollution to the environment; meanwhile, the conventional conductive coating liquid is simply soaked or coated in the prior art, and the conventional conductive coating liquid has common conductivity, so that the high-conductivity application scene cannot be met.
Disclosure of Invention
The invention aims to provide a preparation process of a conductive chemical coating liquid, which adds M-X1-R-X2And the metal organic matter is combined with the surface of the silver powder.
The invention also provides a preparation method of the electric conductor, which utilizes the prepared conductive chemical coating liquid to soak or coat sponge, fiber woven cloth, non-woven fabric, PET film, PI film and the like to form a conductive layer on the outer surface of the electric conductor.
In order to achieve the purpose, the invention adopts the following technical scheme:
a process for preparing a conductive chemical coating liquid comprises the following steps:
(1) adding a solvent into the polymer resin, heating, stirring and dissolving to obtain a polymer resin mixed solution which is a component A;
(2) adding a metal organic substance into a solvent, heating, stirring and dissolving to obtain a metal organic substance solution which is a component B;
(3) mixing silver nanoparticle powder and micro-nano silver flake powder, adding ethanol, and performing ultrasonic treatment by using ultrasonic equipment; centrifuging immediately after the ultrasonic treatment is finished; adding the obtained wet micro-nano silver powder into the component B, stirring and dispersing, and then performing sanding treatment to obtain a component C;
(4) mixing the component C, the component A and the component B to obtain the conductive chemical coating liquid;
the structural formula of the metal organic matter in the step (2) is M-X1-R-X2；
M is silver ion; x1Is a functional group to which a metal ion is attached; r is an alkyl chain; x2The functional group for dispersible micro-nano silver powder comprises: -COOH, -SH, amino, glycol ether chain, propylene glycol ether chain and polyvinylpyrrolidone chain.
More specifically, the polymer resin in step (1) is at least one of polyester or a derivative thereof, polyurethane or a derivative thereof, nylon or a derivative thereof, epoxy resin or a derivative thereof, acrylic resin or a derivative thereof, and phenolic resin or a derivative thereof.
In addition, in the step (1) and the step (2), the solvent used includes one or a combination of two or more of methanol, ethanol, cyclohexane, toluene, xylene, ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol propyl ether, ethylene glycol methyl ether acetate, ethyl acetate, butyl acetate, methyl ethyl ketone, and methyl isobutyl ketone.
In the step (3), the silver nanoparticle powder is granular, and the particle diameter of the silver nanoparticle powder is 1-1000 nm; the micro-nano silver flake powder is in a flake shape, and the flake diameter is 50-2000 nm.
Further, the chemical coating liquid comprises the following raw materials in parts by weight: 1-50 parts of silver nano particle powder, 1-50 parts of micro-nano silver flake powder, 1-30 parts of metal organic matter, 0.1-10 parts of high polymer resin and 50-100 parts of solvent.
In the metal organic compound, M is silver ion.
A method for preparing an electrical conductor, comprising the steps of:
(S-11) immersing the conductive base material in the chemical coating liquid, then taking out the conductive base material, and volatilizing the solvent;
(S-12) baking at 150 ℃ for 5-60min to cure the coating on the conductive substrate to form a conductive coating;
in the above (S-11), the chemical coating liquid is the chemical coating liquid prepared by the production process according to any one of claims 1 to 7.
More specifically, the conductive substrate is a cloth, sponge or membrane.
Further, when it is necessary to further increase the thickness of the conductive coating layer, the steps (S-11) and (S-12) are repeated.
In a further aspect, the membrane is a PET film or a PI film; the cloth body is fiber woven cloth or non-woven cloth.
The invention has the beneficial effects that:
according to the preparation process of the coating liquid, the metal organic matter is dispersed on the surface of the silver powder, so that the problem of nanoparticle agglomeration is solved, and cold welding sintering of the micro-nano silver powder can be realized; the resistivity of the coating can reach 2-4 times of that of the silver of the body, the conductive coating with enough thickness can be obtained by simply and conveniently carrying out one-time construction, the shielding effect is excellent, and the environmental protection problem caused by great electroplating pollution is solved.
Drawings
FIG. 1 is a schematic diagram showing the structure of the silver powder adsorbed with the metal organic.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
A process for preparing a conductive chemical coating liquid comprises the following steps:
(1) adding the polymer resin into a solvent, heating (the temperature is not more than 80 ℃) and stirring for dissolving for 3-6 hours to prepare a polymer resin mixed solution which is a component A;
(2) adding a metal organic matter which can be decomposed at a low temperature of less than 150 ℃ into a solvent, heating (the temperature is not more than 60 ℃), stirring and dissolving for 3-6h to prepare a metal organic matter solution which is a component B;
(3) mixing silver nanoparticle powder and silver nanosheet powder at a ratio (0.1-10): 1), and adding ethanol; immediately performing centrifugal separation on the mixture after ultrasonic treatment is performed for 5-60min by ultrasonic equipment, adding the obtained wet micro-nano silver powder into the component B in proportion, stirring and dispersing, and performing sanding treatment to obtain a component C;
the micro-nano silver powder is treated by ultrasonic to remove organic matters on the surface of the micro-nano silver powder, so that a clean surface is exposed, and the micro-nano silver powder can rapidly pass through a functional group X at the tail end of the micro-nano silver powder after the organic silver compound is added2Adsorbed on the surface of silver powder to obtain composite particles having the structure shown in FIG. 1: the structure can stably disperse the nano particles through the organic silver compound, solve the problem of agglomeration of the nano particles, decompose the organic silver compound through sanding and heating, form atomic silver and initiate cold welding sintering of the micro-nano silver powder. Meanwhile, the obtained coating can realize the thickness of 1-10um, is thicker than the coating thickness (usually only 50-200nm) obtained by only using the organic silver compound solution by more than 1 order of magnitude, and is also thicker than the conventional electroplating coating (usually between hundreds of nanometers and several microns, and very long electroplating time is needed for the thicker electroplating coating);
(4) mixing the component C, the component A and the component B to obtain the conductive chemical coating liquid;
the structural formula of the metal organic matter in the step (2) is M-X1-R-X2；
M is silver ion; x1Functional groups for connecting metal ions, such as-COO-, -S-, -N-and the like which can be matched with silver ions; r is an alkyl chain, preferably containing 1-4 carbon atoms, to facilitate low temperature volatilization decomposition; x2The functional group for dispersible micro-nano silver powder comprises: -COOH, -SH, amino, glycol ether chain, propylene glycol ether chain and polyvinylpyrrolidone chain.
Further, the preparation process of the coating liquid uses metal organic matters dispersed on the surface of the silver powder, solves the problem of nano particle agglomeration, and can realize low-temperature cold welding sintering of the micro-nano silver powder; the resistivity of the coating can reach 2-4 times of that of the silver body, and the conductive coating with enough thickness can be obtained by simply and conveniently carrying out one-time construction, and has excellent shielding effect.
Further, after the wet micro-nano silver powder subjected to ultrasonic treatment is obtained, the component B with metal organic matters is added, and after the wet micro-nano silver powder is dispersed and subjected to sanding treatment through stirring, the component B and the micro-nano silver powder can fully act, new surfaces can be ground through sanding, heat is generated, the action of the metal organic matters and the surfaces of the silver powder is strengthened, and therefore when subsequent three components are prevented from being mixed, resin can interfere the silver powder to adsorb the metal organic matters.
More specifically, the polymer resin in step (1) is at least one of polyester or a derivative thereof, polyurethane or a derivative thereof, nylon or a derivative thereof, epoxy resin or a derivative thereof, acrylic resin or a derivative thereof, and phenolic resin or a derivative thereof.
Furthermore, when the polymer resin is selected to have similar material properties with the conductive base material, the resin can provide good interface compatibility when combined with the conductive base material according to the principle of 'similar compatibility', thereby improving the adhesive force.
In addition, in the step (1) and the step (2), the solvent used includes one or a combination of two or more of methanol, ethanol, cyclohexane, toluene, xylene, ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol propyl ether, ethylene glycol methyl ether acetate, ethyl acetate, butyl acetate, methyl ethyl ketone, and methyl isobutyl ketone.
In the step (3), the silver nanoparticle powder is granular, and the particle diameter of the silver nanoparticle powder is 1-1000 nm; the micro-nano silver flake powder is in a flake shape, and the flake diameter is 50-2000 nm.
The nano-sphere powder has large specific surface and high activity, and can be sintered at a lower temperature, such as at a temperature of not less than 150 ℃. The use of the granular silver nanoparticle powder alone is liable to cause significant thickening at a high content, and is disadvantageous in handling. Therefore, part of the flaky micro-nano silver flake powder is introduced, the fluidity of the slurry can be improved, high-content filling is obtained, and the resistivity is improved.
Further, the conductive chemical coating liquid comprises the following raw materials in parts by weight: 1-50 parts of silver nano particle powder, 1-50 parts of silver micro nano tablet powder, 1-30 parts of metal organic matter, 0.1-10 parts of high molecular resin and 50-100 parts of solvent.
A method for preparing an electrical conductor, comprising the steps of:
(S-11) immersing the conductive base material in the chemical coating liquid, then taking out the conductive base material, and volatilizing the solvent;
(S-12), then baking for 5-60min at 150 ℃ to solidify the coating and form a conductive coating on the conductive substrate;
in the step (S-11), the conductive chemical coating liquid is prepared by the above-mentioned preparation process.
The electric body is a cloth body, a sponge or a membrane;
when the conductive base material is a fabric body, it is preferable to use a polyester fiber woven fabric, a polyurethane fiber woven fabric, a nylon fiber woven fabric, or a nonwoven fabric made of a corresponding material. In this case, the polymer resin used for the conductive coating liquid is preferably polyester, polyurethane, nylon, or the like, because the material similar to the conductive substrate is used, so that "similar compatibility" is realized and adhesion is improved. The coating thickness can reach 1-10um by adopting dip coating or coating, and the prepared conductive cloth has excellent shielding effectiveness, generally 70-90 dB.
When the conductive base material is a sponge, a polyurethane sponge having elasticity is preferably used. In this case, the polymer resin used for the conductive coating liquid is preferably polyurethane because the material is similar to that of the conductive substrate, so that "similar compatibility" is achieved and adhesion is improved.
When the conductive base material is a membrane; preferably a PET film or a PI film.
Further, when it is necessary to further increase the thickness of the conductive coating layer, the steps (S-11) and (S-12) are repeated.
Example A1
(1) Adding a solvent into the polymer resin, heating to 50 ℃, stirring and dissolving for 6 hours to prepare a polymer resin mixed solution which is a component A; the high molecular resin is nylon; the solvent is the combination of toluene and cyclohexane;
(2) adding a solvent into the metal organic matter, heating and stirring the mixture at the temperature of 40 ℃, and dissolving the mixture for 3 hours to prepare a metal organic matter solution which is a component B; the structural formula of the metal organic matter is Ag-OOC-CH2-CH2-COOH; the solvent is the combination of ethanol and cyclohexane;
(3) mixing silver nano particle powder and micro-nano silver sheet powder in a ratio of 1: 1, mixing and adding into ethanol; immediately performing centrifugal separation on the mixture after ultrasonic treatment is performed for 30min by ultrasonic equipment, adding part of the component B after wet micro-nano silver powder is prepared, and performing stirring dispersion and sanding treatment to obtain a component C;
(4) mixing the component C, the component A and the component B in proportion to obtain a chemical coating liquid;
the chemical coating liquid comprises the following raw materials in parts by weight: 30 parts of silver nanoparticle powder, 30 parts of silver micro-nano tablet powder, 10 parts of metal organic matters, 5 parts of high polymer resin and 50 parts of solvent.
Example a 2:
(1) adding a solvent into the polymer resin, heating to 50 ℃, stirring and dissolving for 6 hours to prepare a polymer resin mixed solution which is a component A; the high molecular resin is nylon; the solvent is the combination of toluene and cyclohexane;
(2) stirring the metal organic matter, adding a solvent, heating and stirring at the temperature of 40 ℃, and dissolving for 3 hours to prepare a metal organic matter solution which is a component B; the structural formula of the metal organic matter is Ag-OOC-CH2-CH2-COOH; the solvent is the combination of ethanol and cyclohexane;
(3) mixing silver nano particle powder and silver micro nano tablet powder according to the proportion of 1: 1, mixing and adding into ethanol; after preparing wet silver micro-nano powder, adding part of the component B, stirring and dispersing to obtain a component C;
(4) mixing the component C, the component A and the component B to obtain a chemical coating liquid;
the chemical coating liquid comprises the following raw materials in parts by weight: 30 parts of silver nanoparticle powder, 30 parts of silver micro-nano tablet powder, 10 parts of metal organic matters, 5 parts of high polymer resin and 50 parts of solvent.
A preparation method of conductive cloth comprises the following steps:
(S-11) soaking the blank cloth into the chemical coating liquid, then taking out the conductive cloth, and volatilizing the solvent; the chemical coating liquids were prepared by the processes of example a1 and example a2, respectively.
(S-12), baking for 5-60min at 150 ℃ to form a firm conductive coating on the blank cloth, and respectively preparing two conductive cloths with different treatments, wherein the silver nano particle powder and the silver micro nano tablet powder of the embodiment A1 are mixed and then treated by ultrasonic equipment, centrifugal separation and sanding treatment; the silver nanoparticle powder and silver nanoplatelet powder of example a2 were only mixed briefly.
The two cloths prepared above were subjected to resistivity tests to prepare table 1.
TABLE 1 Effect of ultrasonic centrifugation and sanding treatment steps on resistivity
| Performance of conductive cloth | Example A1 | Example A2 |
| Resistivity (. times.10)-8Ωm) | 6.5 | 24.5 |
Description of the drawings:
as can be seen from the comparison of example A2 with example A1, the resistivity of example A2 is 2.45X 10-7Omega m, which simply mixes the silver nano particle powder and the micro-nano silver flake powder in the step (3); while example A1 had a resistivity of 6.5X 10-8Omega m, the silver nano particle powder and the micro-nano silver flake powder are mixed in the step (3), and are subjected to ultrasonic treatment and centrifugal separation immediately after ultrasonic treatment, organic matters on the surface of the silver powder can be removed in the step, so that a clean surface is exposed, and Ag-OOC-CH is favorably realized2-CH2The adsorption of the organic silver compound of-COOH on the surface, and the subsequent sanding further contributes to the stable formation of a knot of the organic silver compound on the surface of the silver powderStructuring; in example a2, the effect of improving conductivity cannot be achieved with high efficiency by simple mixing, and the effect of improving conductivity by the organic silver compound cannot be fully exerted; illustrating that sonication, centrifugation and subsequent sanding are very critical for the adsorption of the organic silver compound.
Example B:
(1) stirring the polymer resin, adding a solvent, heating to 70 ℃, and dissolving for 3 hours to prepare a polymer resin mixed solution which is a component A; the high molecular resin is polyurethane; the solvent is the combination of glycol methyl ether acetate and butanone;
(2) stirring the metal organic matter, adding a solvent, heating to 50 ℃, and dissolving for 6 hours to prepare a metal organic matter solution which is a component B; the structural formula of the metal organic matter is Ag-S-CH2-CH2-CH2-CH2-NH2(ii) a The solvent is the combination of toluene and cyclohexane;
(3) mixing silver nano particle powder and silver micro nano tablet powder according to the proportion of 1: 2, mixing, and adding ethanol; immediately performing centrifugal separation on the mixture after ultrasonic treatment is performed for 10min by ultrasonic equipment, adding part of the component B after wet micro-nano silver powder is prepared, and performing stirring dispersion and sanding treatment to obtain a component C;
(4) mixing the component C, the component A and the component B to obtain the conductive chemical coating liquid;
the chemical coating liquid comprises the following raw materials in parts by weight: 20 parts of silver nano particle powder, 40 parts of micro-nano silver sheet powder, 7 parts of metal organic matter, 5 parts of high polymer resin and 50 parts of solvent.
Example C:
example C1:
a preparation method of conductive polyester fiber cloth comprises the following steps:
(S-11) immersing the polyester fiber cloth in the chemical coating liquid, then taking out the polyester fiber cloth, and volatilizing the solvent; the chemical coating solutions were the chemical coating solutions prepared by the process of example B, respectively.
(S-12) and then baking for 30min at 150 ℃ to form a firm conductive coating on the polyester fiber cloth, so as to obtain the conductive polyester fiber cloth.
Example C2:
(1) stirring the polymer resin, adding a solvent, heating to 70 ℃, stirring and dissolving for 3 hours to prepare a polymer resin mixed solution which is a component A; the high molecular resin is polyurethane; the solvent is the combination of glycol methyl ether acetate and butanone;
(2) mixing silver nano particle powder and micro-nano silver sheet powder in a ratio of 1: 2, mixing, and adding ethanol; immediately performing centrifugal separation on the mixture after ultrasonic treatment is performed for 10min by ultrasonic equipment, adding part of the component B after wet micro-nano silver powder is prepared, and performing stirring dispersion and sanding treatment to obtain a component C;
(3) mixing the component C and the component A to obtain the conductive chemical coating liquid;
the chemical coating liquid comprises the following raw materials in parts by weight: 20 parts of silver nanoparticle powder, 40 parts of micro-nano silver flake powder, 5 parts of high polymer resin and 50 parts of solvent.
A preparation method of conductive polyester fiber cloth comprises the following steps:
(S-11) immersing the polyester fiber cloth in the chemical coating liquid, then taking out the polyester fiber cloth, and volatilizing the solvent; the chemical coating liquid is the chemical coating liquid prepared by the process of example C2.
(S-12) and then baking for 30min at 150 ℃ to form a firm conductive coating on the polyester fiber cloth, so as to obtain the conductive polyester fiber cloth.
Example C3:
the chemical coating cloth of example B was applied to a polyester fiber cloth, and then baked at 150 ℃ for 30min to form a firm conductive coating on the polyester fiber cloth, followed by electroplating copper on the surface of the conductive coating by a conventional electroplating process.
The resistivity tests and shielding effectiveness tests were performed on the above examples C1-C3, as shown in Table 2.
TABLE 2 comparison of Properties of example C
| Performance of conductive cloth | Example C1 | Example C2 | Example C3 |
| Resistivity (. times.10)-8Ωm) | 6.9 | 21.6 | 2.2 |
| Shielding effectiveness (dB) | 85 | 55 | 90 |
Description of the drawings:
1. as shown by comparing example C2 with example C1, example C2 has a high resistivity of the conductive layer of 2.16X 10 by simply mixing the components-7Omega m; while example C1 had a resistivity of 6.9X 10-8Omega m, which introduces Ag-S-CH on the surface of silver particles2-CH2-CH2-CH2-NH2The dispersion and low-temperature sintering of the nano-particles are improved, so that the resistivity of the conductive cloth coating is lower than that of the conductive cloth coating in the embodiment C2; the shielding effectiveness increased from 55dB to 85dB in example C2.
2. Comparing example C3 with example C1, example C3 shows that the chemical coating liquid cloth of example B is applied to polyester fiber cloth, then baked at 150 ℃ for 30min to form a firm conductive coating on the polyester fiber cloth, and then electroplated with copper by conventional electroplating process to achieve conductivity close to that of silver body. Although example C3 obtained excellent conductivity and shielding performance, example C1 had satisfactory resistivity, which was only 2 to 4 times that of example C3, with less difference between shielding effectiveness, and example C3 caused environmental pollution problems in the heavy metal waste liquid generated by electroplating. For example C1, the resistivity is 2-4 times that of example C3, and the existing conductive chemical liquid is generally only about 100 times close to the body, and less contacts the body within 20 times.
Example D:
(1) adding a solvent into the polymer resin, heating to 70 ℃, stirring and dissolving for 5 hours to prepare a polymer resin mixed solution which is a component A; the high molecular resin is polyurethane; the solvent is the combination of glycol methyl ether acetate and butanone;
(2) stirring the metal organic matter, adding a solvent, heating to 50 ℃, and dissolving for 6 hours to prepare a metal organic matter solution which is a component B; the structural formula of the metal organic matter is Ag-NH-CH2-CH2-CH2-SH; the solvent is ethanol and cyclohexane;
(3) the silver nano particle powder and the micro-nano silver sheet powder are mixed according to the proportion of 0.1: 1, mixing, and adding ethanol; immediately centrifugally separating the mixture after ultrasonic processing for 15min by ultrasonic equipment to obtain wet micro-nano silver powder, adding part of the component B, stirring, dispersing and sanding to obtain a component C;
(4) mixing the component C, the component A and the component B to obtain the conductive chemical coating liquid;
the chemical coating liquid comprises the following raw materials in parts by weight: 5 parts of silver nano particle powder, 50 parts of micro-nano silver sheet powder, 10 parts of metal organic matters, 10 parts of high polymer resin and 60 parts of solvent.
A preparation method of a conductive sponge comprises the following steps:
(S-11) immersing the polyurethane sponge in the chemical coating liquid, then taking out the polyurethane sponge, and volatilizing the solvent; the chemical coating liquids are respectively the chemical coating liquids prepared by the process.
(S-12) and then baking for 5-60min at 150 ℃ to form a firm conductive coating on the polyurethane sponge, thus obtaining the conductive sponge.
Example E:
on the basis of example D, (S-11) and (S-12) were repeated 3 times to make the conductive coating thicker.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (10)
1. A process for preparing a conductive chemical coating liquid, comprising the steps of:
(1) adding a solvent into the polymer resin, heating, stirring and dissolving to obtain a polymer resin mixed solution which is a component A;
(2) adding a metal organic substance into a solvent, heating, stirring and dissolving to obtain a metal organic substance solution which is a component B;
(3) mixing silver nanoparticle powder and micro-nano silver flake powder, adding ethanol, and performing ultrasonic treatment by using ultrasonic equipment; centrifuging immediately after the ultrasonic treatment is finished; adding the obtained wet micro-nano silver powder into the component B, stirring and dispersing, and then performing sanding treatment to obtain a component C;
(4) mixing the component C, the component A and the component B to obtain the conductive chemical coating liquid;
the structural formula of the metal organic matter in the step (2) is M-X1-R-X2；
M is silver ion; x1Is a functional group to which a metal ion is attached; r is an alkyl chain; x2The functional group for dispersible micro-nano silver powder comprises: -COOH, -SH, amino, glycol ether chain, propylene glycol ether chain and polyvinylpyrrolidone chain.
2. The process for preparing a conductive chemical coating solution according to claim 1, wherein the polymer resin in the step (1) is at least one of polyester or a derivative thereof, polyurethane or a derivative thereof, nylon or a derivative thereof, epoxy resin or a derivative thereof, acrylic resin or a derivative thereof, and phenolic resin or a derivative thereof.
3. The process for preparing a conductive chemical coating liquid according to claim 1, wherein the solvent used in the step (1) and the step (2) comprises one or a combination of two or more selected from methanol, ethanol, cyclohexane, toluene, xylene, ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol propyl ether, ethylene glycol methyl ether acetate, ethyl acetate, butyl acetate, methyl ethyl ketone and methyl isobutyl ketone.
4. The process for preparing a conductive chemical coating liquid as claimed in claim 1, wherein in the step (3), the silver nanoparticle powder is in a granular form, and the particle diameter thereof is 1 to 1000 nm; the micro-nano silver flake powder is in a flake shape, and the flake diameter is 50-2000 nm.
5. The process for preparing a conductive chemical coating fluid according to claim 1, wherein the chemical coating fluid comprises the following raw materials in parts by weight: 1-50 parts of silver nano particle powder, 1-50 parts of micro-nano silver flake powder, 1-30 parts of metal organic matter, 0.1-10 parts of high polymer resin and 50-100 parts of solvent.
6. The process according to claim 1, wherein M is silver ion in said metallorganics.
7. A method for preparing an electrical conductor, comprising the steps of:
(S-11) immersing the conductive base material in the chemical coating liquid, then taking out the conductive base material, and volatilizing the solvent;
(S-12) baking at 150 ℃ for 5-60min to cure the coating on the conductive substrate to form a conductive coating;
in the above (S-11), the chemical coating liquid is the chemical coating liquid prepared by the production process according to any one of claims 1 to 7.
8. The method of claim 7, wherein the conductive substrate is a cloth, sponge or film.
9. The conductive cloth of claim 7, wherein steps (S-11) and (S-12) are repeated when a further increase in the thickness of the conductive coating is desired.
10. The conductive cloth according to claim 8, wherein the film is a PET film or a PI film; the cloth body is fiber woven cloth or non-woven cloth.
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| CN201911295052.5A CN110922895A (en) | 2019-12-16 | 2019-12-16 | Preparation process of conductive chemical coating liquid and preparation method of electric conductor |
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| CN201911295052.5A CN110922895A (en) | 2019-12-16 | 2019-12-16 | Preparation process of conductive chemical coating liquid and preparation method of electric conductor |
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| CN201911295052.5A Pending CN110922895A (en) | 2019-12-16 | 2019-12-16 | Preparation process of conductive chemical coating liquid and preparation method of electric conductor |
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