CN109735217B - Water-based graphene electromagnetic shielding coating and preparation method thereof - Google Patents
Water-based graphene electromagnetic shielding coating and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a water-based graphene electromagnetic shielding coating and a preparation method thereof, and belongs to a water-based graphene electromagnetic shielding coating and a preparation method thereof. The coating is two components, wherein the component A consists of hydroxylated aqueous fluorine-containing acrylic resin, conductive polymer modified graphene aqueous dispersion, silver-plated copper powder, ferrite powder, antirust pigment, aqueous passivator, polycarbodiimide, additive and water; the component B consists of an isocyanate curing agent, a dehydrating agent and a solvent. The product has the characteristics of wide shielding frequency band, high shielding efficiency, light weight, super-long weather resistance, corrosion resistance, low VOC (volatile organic compounds) discharge during coating, high storage stability, good long-acting shielding property and the like.
Description
Technical Field
The invention relates to the field of coatings, and particularly relates to a water-based graphene electromagnetic shielding coating and a preparation method thereof.
Background
With the rapid development of the electronic and information industries, the electrification process has penetrated into all corners of national economy, bringing great convenience to production and life and simultaneously burying brand new hidden dangers. On one hand, the electrical equipment can generate electromagnetic radiation with different intensities in the operation process, so that radiation pollution is caused to cause damage to human bodies. The "residential building code", beginning on 1/3/2006, was explicitly indicated in the written summary by the organizational group: "electromagnetic pollution" has been recognized as the fourth major public nuisance after atmospheric pollution, water pollution, noise pollution. The united nations' human environment has largely classified electromagnetic radiation as one of the major pollutants that must be controlled. On the other hand, electromagnetic radiation can cause electromagnetic wave leakage and threaten information security; meanwhile, the electrical equipment is very easily interfered by external electromagnetic radiation, and serious consequences are brought to business, production, life and even military. Therefore, it is important to adopt a reasonable electrostatic shielding scheme.
Generally, the electromagnetic shielding material may be classified into a structural type and a coating type according to a molding process and a load-bearing capacity. Among various electromagnetic shielding materials, the electromagnetic shielding paint is outstanding in that the process is simple, special equipment is not required, the space is not occupied, and the electromagnetic shielding paint is integrated with a base material. Statistics shows that the electromagnetic shielding coating accounts for more than 80% of the total amount of the shielding material.
Among the compositions of electromagnetic shielding coatings, the electromagnetic properties of the conductive filler are critical in determining the shielding properties of the coating. The electromagnetic shielding coating can be classified into 4 types of silver, copper, nickel and carbon based coatings according to the type of the conductive material. The silver product has excellent conductivity and stability and high price, and is mainly used in the aerospace field with higher shielding requirements. Copper-based products have inferior electrical conductivity and good shielding effect, but poor oxidation resistance. The nickel product has conductivity, high price, high shielding effect and high oxidation resistance, and is the mainstream of the application of the electromagnetic shielding coating at present. The carbon products mainly use conductive graphite as a filler, and the products are low in price and poor in conductivity and are mostly applied at low end.
In terms of film forming substances, solvent type polyurethane resin and solvent type acrylic resin are mostly adopted as main film forming components of the electromagnetic shielding coating. The paint uses a large amount of hydrocarbon, benzene, ester and ketone solvents, the VOC of the paint reaches 400-600 g/L, and the environment friendliness is poor. With the gradual falling of national atmospheric treatment policies such as emission reduction and haze control, the water-based coating is becoming the key transformation direction of the electromagnetic shielding coating. At present, some enterprises have continuously proposed environment-friendly water-based electromagnetic shielding coatings, but products still have more technical defects. Mainly comprises the following steps: 1) the shielding effect depends heavily on the metal conductive filler, and the coating is thick and heavy, high in cost and poor in decoration. In addition, the storage problem of the metal filler in the aqueous medium is not fully solved, and the obtained coating has low shielding efficiency and narrow shielding wave band; 2) the coating has poor water vapor barrier property and general weather resistance. After the coating is put into outdoor use, the problems of oxidation of metal filler, water absorption of the coating, resin pulverization and the like can occur, so that the shielding efficiency is quickly reduced, and the maintenance frequency of the coating is high. 3) The product mainly faces to concrete base materials, has poor corrosion protection effect when applied to metal base materials, and has poor adhesive force when applied to plastic base materials.
Disclosure of Invention
The invention aims to provide a water-based graphene electromagnetic shielding coating which is suitable for surfaces of metal, engineering plastics and concrete and has excellent electromagnetic shielding, water vapor barrier and corrosion protection and a preparation method thereof. The coating is a water-based, double-component and self-drying product, and has the technical advantages of wide shielding frequency range, high shielding efficiency, light weight, super-long weather resistance, corrosion resistance, low VOC (volatile organic compounds) discharge during coating, high storage stability, good long-acting shielding property and the like.
The purpose of the invention can be realized by the following technical scheme:
an aqueous graphene electromagnetic shielding coating comprises a component A and a component B;
the component A comprises the following components:
the component B comprises the following components:
70-90 parts of isocyanate curing agent
1-2 parts of dehydrating agent
9-28 parts of a solvent;
the component A and the component B are mixed according to the proportion of 100: (5-15) in proportion.
The technical scheme of the invention is as follows: the hydroxylated aqueous fluorine-containing acrylic resin is DOF chemical DF-03 aqueous resin or NDA new material HD-827 aqueous resin.
The technical scheme of the invention is as follows: the conductive polymer modified graphene aqueous dispersion is prepared by the following method:
s1: mixing water, sodium hydroxide, graphene oxide powder, aniline and pyrrole, and then performing ultrasonic dispersion uniformly to obtain a mixed solution;
s2: under the condition of ice-water bath, slowly adding an aqueous solution of ammonium persulfate into the mixed solution in the S1, reacting for 15-25 h, adjusting the reaction system to be alkaline after the reaction is finished, adding hydrazine hydrate, performing reflux reaction for 18-24 h, and washing the filtered solid after the reflux reaction until the solid is transparent and has a pH value of 7-8 to obtain a solid primary product;
s3: and mixing the solid primary product with a wetting dispersant and water, adjusting the system to be acidic, and performing uniform ultrasonic dispersion to obtain the conductive polymer modified graphene aqueous dispersion.
In the technical scheme of the invention, the parameters of the conductive polymer modified graphene aqueous dispersion are as follows:
in S1: the mass ratio of water, sodium hydroxide, graphene oxide powder, aniline and pyrrole is 50-100: 0.1-0.3: 5-15: 0.1-5: 0.1 to 0.5;
in S2: the mass ratio of pyrrole to ammonium persulfate to hydrazine hydrate is 0.1-0.5: 0.1-5: 0.02 to 0.1;
in S3: the mass ratio of the solid primary product to the wetting dispersant to the water is 5-15: 1-5: 80-90;
preferably: the wetting dispersant is Digao Dispersion 757W wetting dispersant or Pick BYK-190 wetting dispersant.
The technical scheme of the invention is as follows: in component A:
the water-based passivator is WD012 water-based aluminum powder passivator;
the anti-rust pigment is a Kabai HEUCOPHOS ZAPP anti-rust pigment;
the wetting dispersant is Digao Dispersion 757W wetting dispersant or Pick BYK-190 wetting dispersant;
the film-forming additive is alcohol ester dodecyl or dipropylene glycol butyl ether;
the rheological additive is a Haimanshi Bentonie-LT rheological additive;
the substrate wetting agent is a Surfynol 104E substrate wetting agent in the air chemical industry;
the defoaming agent is a Pico BYK-024 defoaming agent;
the polyurethane associative thickener is a Dow RM-8W thickener;
the polycarbodiimide is Starter XR-5580 or Starter XL-701.
The technical scheme of the invention is as follows: in the component B:
the isocyanate curing agent is Coxichu Bayhydur 305 (polyether modified HDI tripolymer), Coxichu Desmodur N3300(HDI tripolymer) and Coxi Desmodur Z4470 SN (IPDI tripolymer), and the mixing ratio of the three is 1-6: 3-8: 1.
the technical scheme of the invention is as follows: in the component B: the solvent is dipropylene glycol methyl ether acetate or propylene glycol diacetate.
The technical scheme of the invention is as follows: in the component B: the dehydrating agent is OMG Additive TI dehydrating agent.
The preparation method of the aqueous graphene electromagnetic shielding paint comprises the following steps:
(1) the preparation method of the component A comprises the following steps:
s1: adding silver-plated copper powder and water-based passivator into absolute ethyl alcohol, and stirring and mixing for 30 min; filtering to obtain silver-plated copper powder, and drying at 50 deg.C for 20min to obtain surface-treated silver-plated copper powder;
s2: under the condition of stirring, sequentially adding a wetting dispersant, fumed silica, a rheological aid, a conductive polymer modified graphene aqueous dispersion, surface-treated silver-plated copper powder, ferrite powder, an anti-rust pigment and a defoaming agent into water, and dispersing at a high speed until the mixture is uniform, free of powder agglomerates and free of agglomeration; then adding dimethylethanolamine, and adjusting the pH value of the slurry to 6.5-7.5; adding hydroxylated water-based fluorine-containing acrylic resin, film forming additive, base material wetting agent and isothiazolinone, and uniformly stirring; adding a polyurethane associative thickener to adjust the viscosity of the system to 70-110 KU; adding polycarbodiimide, uniformly stirring, and curing at room temperature for 24 hours to obtain a component A of the aqueous graphene electromagnetic shielding coating;
(2) the preparation method of the component B comprises the following steps: adding the solvent and the dehydrating agent into a paint mixing kettle, and stirring for 30min under the protection of nitrogen. Adding an isocyanate curing agent, and uniformly stirring to obtain a component B of the aqueous graphene electromagnetic shielding coating;
(3) mixing the component A and the component B according to the proportion of 100: and (5) uniformly mixing the components in the ratio of (5) to (15) to obtain the target product.
The invention has the beneficial effects that:
firstly, a ternary shielding system of 'modified graphene/silver-plated copper powder/ferrite' is adopted, so that the shielding frequency band of the coating is wide, and the shielding efficiency is high. The graphene has a two-dimensional periodic structure consisting of carbon six-membered rings, has pi-pi conjugation, and has excellent conductivity, high specific surface area, tensile strength, light transmittance, stability and the like. The introduction of the graphene component obviously improves the conductivity of the coating, effectively reduces the metal consumption and makes the coating lighter. Meanwhile, the risk of weakening the shielding effectiveness caused by metal oxidation and the like can be reduced. And secondly, performing functional modification on the graphene by adopting a conductive polymer. The problem of graphene sheet layer agglomeration is solved under the condition of not influencing the conductivity, the compatibility of the graphene and the film-forming resin is improved, and the water vapor barrier and mechanical reinforcement properties of the graphene are fully exerted. Thirdly, the copper powder is subjected to antioxidant protection by comprehensively using a passivation mode of plating metal and organic matters, so that the stability of the copper powder in water environment and outdoor atmosphere environment is greatly improved. Meanwhile, the problem of reduced conductivity of the coating is avoided by reasonably controlling the consumption of the passivating agent. Fourthly, a water-based fluorine-containing acrylic acid-isocyanate film forming system with high environmental protection and excellent weather resistance is selected, and the VOC emission of coating can be reduced to below 50 g/L. Compared with film forming systems such as styrene-acrylic emulsion, pure acrylic emulsion, hydroxyl acrylic emulsion and the like which are commonly used in the market, the scheme has the advantages of better weather resistance and higher protection life, and can greatly reduce the maintenance cost of the coating. Fifthly, polycarbodiimide is preferable to block excessive hydrophilic groups in the resin and the auxiliary agent with high efficiency. On the premise of not reducing the stability of the system, the water resistance, chemical resistance, salt spray resistance and hardness of the coating are greatly improved, and the protection effect is further improved. And sixthly, the hydrophilic isocyanate and the hydrophobic isocyanate are compounded to prepare the water-based curing agent, so that the influence of too high content of a hydrophilic chain segment on the corrosion resistance of the coating is avoided. Meanwhile, through reasonable proportioning screening, the high compatibility of the curing agent system and the water-based resin system is ensured, and a coating is endowed with a better decorative effect. Furthermore, the appropriate addition of IPDI trimer improves the drying rate and hardness of the coating.
The aqueous graphene electromagnetic shielding paint disclosed by the invention has the advantages of wide shielding frequency range, high shielding efficiency, light weight, super-long weather resistance, corrosion resistance, low VOC (volatile organic compounds) emission during coating, high storage stability and good long-acting shielding property.
Detailed Description
The present invention is further illustrated by the following examples, but the scope of the invention is not limited thereto. The preparation steps of the aqueous graphene electromagnetic shielding coatings of the embodiments 1 to 4 and the comparative examples 1 to 3 are as follows (the material ratio is shown in table 1):
(1) preparing a conductive polymer modified graphene aqueous dispersion: adding water and sodium hydroxide into a reactor, and uniformly stirring. Adding graphene oxide powder, aniline and pyrrole, performing ultrasonic dispersion for 30min, and stirring in an ice water bath for 5 min. And dissolving ammonium persulfate in water, slowly dropping the solution into the reactor, and finishing dropping for 1 hour. And continuously stirring and reacting for 15-16 h in an ice water bath. Adding a small amount of ammonia water, and adjusting the pH value of the system to 10-11. Adding 80% hydrazine hydrate, and carrying out reflux reaction at 80-90 ℃ for 18-19 h. And cooling, filtering out the solid, and washing the product with absolute ethyl alcohol and distilled water in sequence until the eluate is colorless and transparent and has a pH value of 7-8. And uniformly mixing the solid with a wetting dispersant and water, dropwise adding 0.01mol/L hydrochloric acid to adjust the pH value of the solution to 6-7, and performing ultrasonic dispersion for 30min to obtain the conductive polymer modified graphene aqueous dispersion.
(2) Surface treatment of silver-plated copper powder: silver-plated copper powder and WD012 aqueous aluminum powder passivator are added into 150g of absolute ethyl alcohol, and stirred and mixed for 30 min. Filtering to obtain silver-plated copper powder, and drying at 50 deg.C for 20min to obtain surface-treated silver-plated copper powder.
(3) The preparation method of the aqueous graphene electromagnetic shielding coating A comprises the following steps: adding wetting dispersant, fumed silica, Bentone-LT rheological additive, conductive polymer modified graphene aqueous dispersion, surface-treated silver-plated copper powder, ferrite powder, ZAPP (Zapp) antirust pigment and BYK-024 defoaming agent into water in sequence under stirring, and dispersing at high speed to be uniform without powder agglomerates and caking. Adding dimethylethanolamine, and adjusting the pH value of the slurry to 6.5-7.5. Adding hydroxylated water-based fluorine-containing acrylic resin, film forming additive, Surfynol 104E base material wetting agent and isothiazolinone, and stirring uniformly. Adding an RM-8W thickening agent to adjust the viscosity of the system to 70-110 KU. Adding polycarbodiimide, uniformly stirring, and curing at room temperature for 24 hours to obtain the component A of the aqueous graphene electromagnetic shielding coating.
(4) Preparing a component B of the aqueous graphene electromagnetic shielding coating: adding the solvent and the Additive TI dehydrating agent into a paint mixing kettle, and stirring for 30min under the protection of nitrogen. Adding the Kostewa Bayhydur 305, the Desmodur N3300 and the Desmodur Z4470 SN, and uniformly stirring to obtain the component B of the aqueous graphene electromagnetic shielding paint.
TABLE 1 addition amount (g) of materials in examples 1 to 4 and comparative examples 1 to 3
Table 2 main technical indexes of aqueous graphene electromagnetic shielding coating
Test results show that the waterborne graphene electromagnetic shielding coatings suitable for the surfaces of metal, engineering plastic and concrete, high in stability, excellent in shielding effectiveness, outstanding in corrosion protection and excellent in weather resistance are obtained in the embodiments 1 to 4. Among them, the comprehensive performance of the examples 2, 3 and 4 is more prominent.
From the test results of examples 1 to 4, it can be seen that the product obtained in example 2 using the high graphene and low metal filler ratio is superior to that obtained in example 1 using the low graphene and high metal filler contents in terms of surface resistivity, shielding effectiveness, hardness, adhesion, and salt spray resistance. Meanwhile, after 1 year of outdoor aging, the shielding effectiveness of the product of example 2 is more stable. Therefore, the conductive polymer modified graphene is used for replacing metal fillers, so that the conductivity and shielding energy efficiency of a system are not damaged, the PVC of the coating is reduced, and the compactness of the coating is improved. Meanwhile, the graphene can also fully play the roles of mechanical reinforcement and water vapor shielding, and the mechanical property and the corrosion prevention effect of the coating are improved. In the experiment, we also find that, for the ternary composite system of 'modified graphene/silver-plated copper powder/ferrite', a higher proportion of 'modified graphene + silver-plated copper powder' is beneficial to high-frequency shielding of electromagnetic waves (example 3), and a higher proportion of 'modified graphene + ferrite' is beneficial to low-frequency shielding of electromagnetic waves (example 2). Therefore, in practical application, the coating formula can be reasonably adjusted according to the shielding frequency band requirements of buildings and electrical equipment. For the occasions with higher shielding requirements of all frequency bands, a better shielding effect can be obtained by simultaneously coating two coatings (see table 3).
Table 3 double coating combination barrier effect of example 2 coating with example 3 coating
Comparative example 1 test results show that a low surface resistivity, high shielding effectiveness product cannot be obtained using an unmodified graphene dispersion. Meanwhile, the salt spray resistance, the water resistance and the hardness of the coating are also reduced, and the foaming defect is generated earlier in the artificial weathering resistance test. The method is caused by the fact that unmodified graphene is rapidly agglomerated in a coating system, the characteristics of conductivity, mechanical reinforcement, water vapor barrier and the like cannot be exerted, and the comprehensive performance of the coating is reduced.
Comparative example 2 test results show that control of the content of hydrophilic groups is critical to water resistance, corrosion resistance and long-term shielding properties of the coating layer. Curing treatment of the coating without polycarbodiimide can cause a large amount of hydrophilic groups introduced by additives and resin to remain in the coating; the use of only hydrophilic isocyanate curing agents further introduces a large amount of hydrophilic groups into the coating system. The synergistic effect of the two can obviously improve the water absorption of the coating and damage the water resistance and the salt spray resistance of the product, thereby leading the coating to be easier to foam and fall off and the metal filler to be easier to oxidize and consume, and obviously influencing the long-acting property. By using the polycarbodiimide, hydrophilic groups can be effectively sealed, and the crosslinking density of the coating can be improved, so that the hardness and the wear resistance are improved. In experiments, the dosage of the polycarbodiimide is strictly controlled, otherwise, the resin is gelatinized, and the problems of thickening, water diversion, emulsion breaking, particle and the like of the coating are caused. The properly matched hydrophobic HDI tripolymer can also improve the water resistance of the coating, thereby improving the corrosion protection effect. The proper combination of IPDI trimer can improve the drying rate and hardness of the coating. In experiments, the proportion of the hydrophobic curing agent is not high enough, otherwise, the compatibility of the curing agent and the water-based resin is damaged, the coating has poor film forming property and low gloss, and the adhesive force and the corrosion protection effect of the coating are damaged.
Comparative example 3 test results show that surface treatment of metal fillers without a passivating agent affects the shielding effectiveness, especially long-lasting shielding effectiveness, of the coating. Because the surface of the copper powder has coating defects when silver coating is carried out, if effective protection is not carried out, the copper powder can be partially oxidized after being added with a water medium, and the initial shielding performance is influenced. After the copper powder is put into outdoor use, the copper powder which is not fully protected can be oxidized and lost more quickly, so that the shielding effectiveness is reduced quickly. It has also been found that the amount of passivating agent used should be strictly controlled, otherwise the conductivity of the metal filler is reduced and the electromagnetic shielding performance is impaired.
Claims (8)
1. The water-based graphene electromagnetic shielding coating is characterized by comprising the following components in parts by weight: the coating comprises a component A and a component B;
the component A comprises the following components:
30-55 parts of hydroxylated water-based fluorine-containing acrylic resin
2-12 parts of conductive polymer modified graphene aqueous dispersion
10-20 parts of silver-plated copper powder
2-10 parts of ferrite powder
0.1-0.5 part of water-based passivator
2-8 parts of antirust pigment
0.3-1.2 parts of wetting dispersant
1-4 parts of film forming auxiliary agent
0.01-0.1 part of dimethylethanolamine
0.1 to 0.3 part of fumed silica
0.2-0.6 part of rheological additive
0.3 to 0.8 portion of base material wetting agent
0.05-0.5 part of defoaming agent
0.02-0.2 part of isothiazolinone
0.4 to 1.5 portions of polyurethane associated thickener
0.5-2 parts of polycarbodiimide
5-30 parts of water;
the component B comprises the following components:
70-90 parts of isocyanate curing agent
1-2 parts of dehydrating agent
9-28 parts of a solvent;
the component A and the component B are mixed according to the proportion of 100: (5-15) mixing;
the isocyanate curing agent is prepared from Kostew Bayhydur 305, Kostew Desmodur N3300 and Kostew Desmodur Z4470 SN, and the mixing ratio of the three is 1-6: 3-8: 1.
2. the aqueous graphene electromagnetic shielding paint according to claim 1, wherein: the hydroxylated aqueous fluorine-containing acrylic resin is DOF chemical DF-03 aqueous resin or NDA new material HD-827 aqueous resin.
3. The aqueous graphene electromagnetic shielding paint according to claim 1, wherein: the conductive polymer modified graphene aqueous dispersion is prepared by the following method:
s1: mixing water, sodium hydroxide, graphene oxide powder, aniline and pyrrole, and then performing ultrasonic dispersion uniformly to obtain a mixed solution;
s2: under the condition of ice-water bath, slowly adding an aqueous solution of ammonium persulfate into the mixed solution in the S1, reacting for 15-25 h, adjusting the reaction system to be alkaline after the reaction is finished, adding hydrazine hydrate, performing reflux reaction for 18-24 h, and washing the filtered solid after the reflux reaction until the solid is transparent and has a pH value of 7-8 to obtain a solid primary product;
s3: and mixing the solid primary product with a wetting dispersant and water, adjusting the system to be acidic, and performing uniform ultrasonic dispersion to obtain the conductive polymer modified graphene aqueous dispersion.
4. The aqueous graphene electromagnetic shielding paint according to claim 3, characterized in that:
in S1: the mass ratio of water, sodium hydroxide, graphene oxide powder, aniline and pyrrole is 50-100: 0.1-0.3: 5-15: 0.1-5: 0.1 to 0.5;
in S2: the mass ratio of pyrrole to ammonium persulfate to hydrazine hydrate is 0.1-0.5: 0.1-5: 0.02 to 0.1;
in S3: the mass ratio of the solid primary product to the wetting dispersant to the water is 5-15: 1-5: 80-90;
the wetting dispersant is Digao Dispersion 757W wetting dispersant or Pick BYK-190 wetting dispersant.
5. The aqueous graphene electromagnetic shielding paint according to claim 1, wherein: in component A:
the water-based passivator is WD012 water-based aluminum powder passivator;
the anti-rust pigment is a Kabai HEUCOPHOS ZAPP anti-rust pigment;
the wetting dispersant is Digao Dispersion 757W wetting dispersant or Pick BYK-190 wetting dispersant;
the film-forming additive is alcohol ester dodecyl or dipropylene glycol butyl ether;
the rheological additive is a Haimanshi Bentonie-LT rheological additive;
the substrate wetting agent is a Surfynol 104E substrate wetting agent in the air chemical industry;
the defoaming agent is a Pico BYK-024 defoaming agent;
the polyurethane associative thickener is a Dow RM-8W thickener;
the polycarbodiimide is Starter XR-5580 or Starter XL-701.
6. The aqueous graphene electromagnetic shielding paint according to claim 1, wherein: in the component B: the solvent is dipropylene glycol methyl ether acetate or propylene glycol diacetate.
7. The aqueous graphene electromagnetic shielding paint according to claim 1, wherein: in the component B: the dehydrating agent is OMG Additive TI dehydrating agent.
8. The preparation method of the aqueous graphene electromagnetic shielding paint according to claim 1, characterized by comprising the following steps: the method comprises the following steps:
(1) the preparation method of the component A comprises the following steps:
s1: adding silver-plated copper powder and water-based passivator into absolute ethyl alcohol, and stirring and mixing for 30 min; filtering to obtain silver-plated copper powder, and drying at 50 deg.C for 20min to obtain surface-treated silver-plated copper powder;
s2: under the condition of stirring, sequentially adding a wetting dispersant, fumed silica, a rheological aid, a conductive polymer modified graphene aqueous dispersion, surface-treated silver-plated copper powder, ferrite powder, an anti-rust pigment and a defoaming agent into water, and dispersing at a high speed until the mixture is uniform, free of powder agglomerates and free of agglomeration; then adding dimethylethanolamine, and adjusting the pH value of the slurry to 6.5-7.5; adding hydroxylated water-based fluorine-containing acrylic resin, film forming additive, base material wetting agent and isothiazolinone, and uniformly stirring; adding a polyurethane associative thickener to adjust the viscosity of the system to 70-110 KU; adding polycarbodiimide, uniformly stirring, and curing at room temperature for 24 hours to obtain a component A of the aqueous graphene electromagnetic shielding coating;
(2) the preparation method of the component B comprises the following steps: adding a solvent and a dehydrating agent into a paint mixing kettle, and stirring for 30min under the protection of nitrogen;
adding an isocyanate curing agent, and uniformly stirring to obtain a component B of the aqueous graphene electromagnetic shielding coating;
(3) mixing the component A and the component B according to the proportion of 100: and (5) uniformly mixing the raw materials in a ratio of 5-15 to obtain the target product.
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| CN111454641B (en) * | 2020-05-29 | 2022-06-17 | 南京长江涂料有限公司 | Aqueous single-component conductive coating for insulator and preparation method thereof |
| CN114226724B (en) * | 2021-12-22 | 2024-01-16 | 合肥工业大学 | Copper@silver core-shell structure particle and related preparation method and application |
| CN115340823A (en) * | 2022-08-18 | 2022-11-15 | 东莞市樱之蓝新材料科技有限公司 | Odorless environment-friendly low-resistance water-based conductive paint and preparation method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792631A (en) * | 2010-04-01 | 2010-08-04 | 国家电网公司 | High hydrophobic static-electricity conducting anti-icing coating and method for producing same |
| CN102002294A (en) * | 2010-12-03 | 2011-04-06 | 北京工业大学 | Electromagnetic shielding waterborne paint and preparation method thereof |
| CN102127361A (en) * | 2011-01-31 | 2011-07-20 | 中国人民解放军91872部队 | Light-color antistatic coating with high electromagnetic wave transmissivity and preparation method thereof |
| KR20120086225A (en) * | 2011-01-25 | 2012-08-02 | 도레이첨단소재 주식회사 | Metal oxide containing anti-static coating composition and anti-static coating film using the same and manufacturing method thereof |
| CN103450477A (en) * | 2012-05-31 | 2013-12-18 | 海洋王照明科技股份有限公司 | Preparation method of graphene composite current collector |
| CN104494241A (en) * | 2014-12-08 | 2015-04-08 | 国家电网公司 | Electromagnetic shielding composite rubber material and preparation method thereof |
| CN105670487A (en) * | 2016-03-22 | 2016-06-15 | 湖州国信物资有限公司 | Dual-liquid type waterborne polyurethane coating and preparation method thereof |
| CN106244081A (en) * | 2016-07-28 | 2016-12-21 | 上海乘鹰新材料有限公司 | Solar cell backboard Adhesive composition and preparation method thereof |
| CN106867354A (en) * | 2017-01-17 | 2017-06-20 | 合众（佛山）化工有限公司 | A kind of Graphene fluorine richness polyurethane resin aqueous functional coating |
| CN108165151A (en) * | 2017-12-25 | 2018-06-15 | 南京长江涂料有限公司 | A kind of watersoluble fluorine-carbon modified acrylic polyurethane finish paint and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6750274B2 (en) * | 2001-02-08 | 2004-06-15 | Ppg Industries Ohio. Inc. | Weldable coating of phosphated epoxy polymer, curing agent and electroconductive pigment |
-
2018
- 2018-12-06 CN CN201811488657.1A patent/CN109735217B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792631A (en) * | 2010-04-01 | 2010-08-04 | 国家电网公司 | High hydrophobic static-electricity conducting anti-icing coating and method for producing same |
| CN102002294A (en) * | 2010-12-03 | 2011-04-06 | 北京工业大学 | Electromagnetic shielding waterborne paint and preparation method thereof |
| KR20120086225A (en) * | 2011-01-25 | 2012-08-02 | 도레이첨단소재 주식회사 | Metal oxide containing anti-static coating composition and anti-static coating film using the same and manufacturing method thereof |
| CN102127361A (en) * | 2011-01-31 | 2011-07-20 | 中国人民解放军91872部队 | Light-color antistatic coating with high electromagnetic wave transmissivity and preparation method thereof |
| CN103450477A (en) * | 2012-05-31 | 2013-12-18 | 海洋王照明科技股份有限公司 | Preparation method of graphene composite current collector |
| CN104494241A (en) * | 2014-12-08 | 2015-04-08 | 国家电网公司 | Electromagnetic shielding composite rubber material and preparation method thereof |
| CN105670487A (en) * | 2016-03-22 | 2016-06-15 | 湖州国信物资有限公司 | Dual-liquid type waterborne polyurethane coating and preparation method thereof |
| CN106244081A (en) * | 2016-07-28 | 2016-12-21 | 上海乘鹰新材料有限公司 | Solar cell backboard Adhesive composition and preparation method thereof |
| CN106867354A (en) * | 2017-01-17 | 2017-06-20 | 合众（佛山）化工有限公司 | A kind of Graphene fluorine richness polyurethane resin aqueous functional coating |
| CN108165151A (en) * | 2017-12-25 | 2018-06-15 | 南京长江涂料有限公司 | A kind of watersoluble fluorine-carbon modified acrylic polyurethane finish paint and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 《Reactive emulsion mixing as a novel pathway toward water-borne reduced graphene oxide/polymer composites》;D. Spasevska .et.al.;《RSC Advances》;20140527;第4卷(第47期);第24477-24483页 * |
| 《异氰酸酯固化水性氟硅丙烯酸树脂及其涂膜性能研究》;高举等;《福建师范大学学报(自然科学版)》;20161130;第32卷(第6期);第46-51页 * |
| 《氟丙导电防腐蚀涂料的研制》;陈沛智等;《涂料工业》;20051031;第35卷(第10期);第21-23页 * |
| 《镀银铜粉电磁屏蔽水性涂料的制备及性能研究》;李桃安等;《化学工业与工程》;20110531;第28卷(第3期);第9-13页 * |
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