CN114316697A - Water-soluble wave-absorbing slurry, wave-absorbing film and preparation method thereof - Google Patents
Water-soluble wave-absorbing slurry, wave-absorbing film and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 16
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- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 25
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 25
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 21
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 10
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- 238000000576 coating method Methods 0.000 claims description 46
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- 238000001816 cooling Methods 0.000 claims description 13
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- 239000000843 powder Substances 0.000 claims description 13
- 238000007731 hot pressing Methods 0.000 claims description 9
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 3
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 3
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 claims description 3
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- LWZFANDGMFTDAV-BURFUSLBSA-N [(2r)-2-[(2r,3r,4s)-3,4-dihydroxyoxolan-2-yl]-2-hydroxyethyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O LWZFANDGMFTDAV-BURFUSLBSA-N 0.000 claims description 3
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- VBICKXHEKHSIBG-UHFFFAOYSA-N beta-monoglyceryl stearate Natural products CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 claims description 3
- -1 iron-silicon-aluminum Chemical compound 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 3
- 229950006451 sorbitan laurate Drugs 0.000 claims description 3
- 235000011067 sorbitan monolaureate Nutrition 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- XEVZIAVUCQDJFL-UHFFFAOYSA-N [Cr].[Fe].[Si] Chemical compound [Cr].[Fe].[Si] XEVZIAVUCQDJFL-UHFFFAOYSA-N 0.000 claims description 2
- VAWNDNOTGRTLLU-UHFFFAOYSA-N iron molybdenum nickel Chemical compound [Fe].[Ni].[Mo] VAWNDNOTGRTLLU-UHFFFAOYSA-N 0.000 claims description 2
- 239000002313 adhesive film Substances 0.000 abstract description 9
- 239000002904 solvent Substances 0.000 abstract description 9
- 230000000052 comparative effect Effects 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
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- 238000004073 vulcanization Methods 0.000 description 5
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 4
- 239000011358 absorbing material Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
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- 229920005989 resin Polymers 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
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- 239000002562 thickening agent Substances 0.000 description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
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- 239000013530 defoamer Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
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- 230000036541 health Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
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- 230000002441 reversible effect Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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Images
Abstract
The invention discloses water-soluble wave-absorbing slurry, a wave-absorbing film and a preparation method thereof, wherein the water-soluble wave-absorbing slurry comprises 70-95 parts of a wave-absorbing agent, 5-30 parts of polyvinyl alcohol with the alcoholysis degree of 96-100, 0.5-10 parts of glycerol, 1-10 parts of acrylamide modified polyvinyl alcohol, 0.05-1 part of a defoaming agent containing peroxide and 0.01-0.05 part of a cross-linking agent, and the problems that an oil-soluble slurry solvent pollutes the environment and an existing water-based system film adhesive film has oil spots, is attached and vulcanized to form layers, is low in product density and cannot be recycled are solved.
Description
Technical Field
The invention relates to the field of electromagnetic interference and electromagnetic compatibility, in particular to water-soluble wave-absorbing slurry, a wave-absorbing film and a preparation method thereof.
Background
With the rapid development of information technology, electronic products are developed to high frequency, micro size and integration, and electromagnetic interference and electromagnetic radiation pollution are more serious. The wave-absorbing material can absorb electromagnetic waves incident to the surface of the wave-absorbing material and then convert the electromagnetic waves into heat energy or energy in other forms, and can effectively solve the problems of electromagnetic interference and electromagnetic radiation pollution.
The wave-absorbing material mainly comprises an absorbent and an adhesive, and the wave-absorbing material mainly comprises two production processes, wherein one process is dry production, the absorbent and the adhesive are firstly mixed and plasticized in an internal mixer, then the mixture is taken out of a sheet on a calender, and finally the sheet is vulcanized and crosslinked on a vulcanizer; the other method is wet coating, in the production process, the absorbent, the adhesive, the auxiliary agent, the solvent or the water are uniformly stirred and dispersed, then the coating is coated on a PET release film to volatilize the solvent or the water, and then the dried coating is vulcanized and crosslinked on a vulcanizing machine. The solvent formula pollutes the environment and harms the health of production workers. On one hand, the existing water-based formula needs to add a large amount of solvents which are miscible with water and have low boiling points such as absolute ethyl alcohol and acetone so as to improve the volatilization speed, and does not completely prevent the solvent pollution, and on the other hand, the existing water-based formula contains a water-loss cross-linked adhesive and is not beneficial to subsequent vulcanization cross-linking.
Disclosure of Invention
The invention provides water-soluble wave-absorbing slurry, a wave-absorbing film and a preparation method thereof, and solves the problems that an oil-soluble slurry solvent pollutes the environment, an existing water-based system film adhesive film has oil spots, is laminated and vulcanized, is low in product density, cannot be recycled and the like.
In order to solve the technical problem, the invention provides the following technical scheme:
the water-soluble wave-absorbing slurry comprises the following components in parts by weight:
the selected bonding resin is polyvinyl alcohol with alcoholysis degree of 96-100, is water-soluble resin, is dehydrated to form a film, is soluble in hot water and is reversible. The selected thickener is acrylamide modified polyvinyl alcohol, and has good compatibility with the polyvinyl alcohol. The selected antifoaming agent takes peroxide as foam breaking particles, so that the phenomenon that the gaps of the absorbing agent of the absorbing film are enlarged due to the introduction of solids such as polysiloxane, silicon dioxide, talcum powder and the like is avoided. The glycerol is selected to plasticize the polyvinyl alcohol and also to act as a co-solvent. The water-soluble wave-absorbing slurry has good compatibility and synergistic effect among the components, and solves the problems of environment pollution caused by oil-soluble slurry solvent, oil spots of the existing water-based system film adhesive film, laminating, vulcanization, layering, low product density, non-recyclability and the like.
Preferably, the wave absorbing agent is at least one selected from nickel-zinc ferrite powder, manganese-zinc ferrite powder, iron-silicon-aluminum powder, iron-nickel-molybdenum powder, iron-silicon-chromium powder and carbonyl iron powder.
Preferably, the preparation method of the acrylamide modified polyvinyl alcohol comprises the following steps: mixing 5-15 parts of polyvinyl alcohol with 60-120 parts of water, stirring, heating to 80-100 ℃, preserving heat for 1-2 hours, adding 0.01-0.5 part of acrylamide, slowly dropwise adding 10ml of 0.1% sodium persulfate aqueous solution, dispersing for 1-3 hours by using a wheel disc after the addition is finished, and cooling to obtain the polyvinyl alcohol.
Preferably, the preparation of the peroxide-containing antifoaming agent comprises the following steps: a. preparing the following raw materials in parts by weight: 20-30 parts of stearic acid monoglyceride, 20-30 parts of dicumyl peroxide, 1-5 parts of sorbitan laurate and 35-70 parts of water; b. mixing, stirring and heating the components to 75-80 ℃ according to parts by weight, stirring at constant temperature for 0.5-1 h, and cooling to obtain the high-performance composite material.
Preferably, the crosslinking agent is at least one selected from the group consisting of triallylisocyanurate and di-t-butyl peroxide.
The scheme also provides a preparation method of the water-soluble wave-absorbing slurry, which comprises the steps of mixing 5-30 parts of polyvinyl alcohol with alcoholysis degree of 96-100 with 10-300 parts of water, stirring, heating in a water bath to 85-100 ℃, preserving heat for 1-3 hours, and cooling to normal temperature; and then sequentially adding 0.05-1 part of defoaming agent containing peroxide, 70-95 parts of wave absorbing agent, 0.5-10 parts of glycerol, 1-10 parts of acrylamide modified polyvinyl alcohol and 0.01-0.05 part of cross-linking agent, and fully stirring for 0.5-4 hours to obtain the water-soluble wave absorbing slurry.
The scheme also provides a wave-absorbing film, and the wave-absorbing film is prepared from the water-soluble wave-absorbing slurry.
The scheme also provides a preparation method of the wave-absorbing film, which comprises the following steps: s1, coating the water-soluble wave-absorbing slurry on a base material; s2, volatilizing moisture in the slurry in a natural wind, hot air, infrared ray or microwave mode to form a coating; and S3, attaching the two coatings oppositely, and vulcanizing at high temperature to obtain the coating.
The scheme solves the problems of environment pollution caused by oil-soluble slurry solvent, oil spots of the existing water-based system film adhesive film, laminating, vulcanization, layering, low product density, non-recycling and the like.
Preferably, when the wave-absorbing film is required to be a sheet, the step S3 is: the two coatings are attached to each other by a flat vulcanizing machine, the hot pressing temperature is 140-.
Preferably, when the wave-absorbing film is required to be a coiled material, the step S3 is as follows: the two coatings are attached to each other by adopting a parallel steel belt continuous vulcanizing machine or a drum vulcanizing machine, the hot pressing temperature is 150-.
Compared with the prior art, the invention has the following advantages:
the zero-VOC water-soluble wave-absorbing slurry provided by the invention has the following advantages:
1. zero VOC is environmentally friendly.
2. The coating which is coated and dried can be recycled through water dissolution.
3. The compatible thickener and defoamer avoid the defects of oil stain, lamination, vulcanization layering, low product density and the like of a film adhesive film.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a wave-absorbing coating prepared on a PET release film in example 1 of the present invention;
fig. 2 is a schematic view of a wave-absorbing film prepared by the wave-absorbing coating in embodiment 1 of the invention.
Wherein, the reference numbers and corresponding structure names in the drawings are as follows:
1. transparent PET release film; 2. and (3) wave-absorbing coating.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limitations of the present invention.
Preparing raw materials:
preparation of acrylamide modified polyvinyl alcohol: mixing 5-15 parts of polyvinyl alcohol with 60-120 parts of water, stirring, heating to 80-100 ℃, preserving heat for 1-2 hours, adding 0.01-0.5 part of acrylamide, slowly dropwise adding 10ml of 0.1% sodium persulfate aqueous solution, dispersing for 1-3 hours by using a wheel disc after the addition is finished, and cooling to obtain the polyvinyl alcohol.
Preparation of peroxide-containing antifoam: a. preparing the following raw materials in parts by weight: 20-30 parts of stearic acid monoglyceride, 20-30 parts of dicumyl peroxide, 1-5 parts of sorbitan laurate and 35-70 parts of water; b. mixing, stirring and heating the components to 75-80 ℃ according to parts by weight, stirring at constant temperature for 0.5-1 h, and cooling to obtain the high-performance composite material.
Example 1
Mixing 5 parts of polyvinyl alcohol with alcoholysis degree of 99 with 10 parts of water, stirring, heating to 85 ℃ in a water bath, preserving heat for 1 hour, and cooling to normal temperature;
and then sequentially adding 0.05 part of defoaming agent containing peroxide, 70 parts of nickel-zinc ferrite powder, 0.5 part of glycerol, 0.015 part of triallyl isocyanurate and 1 part of acrylamide modified polyvinyl alcohol, and fully stirring for 0.5h to obtain the water-soluble wave-absorbing slurry.
Coating the water-soluble wave-absorbing slurry on a PET release film by adopting blade coating; and (3) volatilizing moisture in the slurry by adopting hot air to form the coating. As shown in fig. 1, 1 is a transparent PET release film, and 2 is a wave-absorbing coating.
As shown in fig. 2, two coatings are attached to each other, a press vulcanizer is adopted, the hot pressing temperature is 140 ℃, the pressure is 60Mpa, and the two coatings are pressed and melted into a whole to obtain the wave-absorbing film.
Example 2
Mixing 10 parts of polyvinyl alcohol with alcoholysis degree of 98 with 45 parts of water, stirring, heating to 85 ℃ in a water bath, preserving heat for 1 hour, and cooling to normal temperature;
and then sequentially adding 0.5 part of defoaming agent containing peroxide, 75 parts of manganese-zinc ferrite powder, 1 part of glycerol, 0.01 part of di-tert-butyl peroxide and 5 parts of acrylamide modified polyvinyl alcohol, and fully stirring for 2 hours to obtain the water-soluble wave-absorbing slurry.
Coating the water-soluble wave-absorbing slurry on a PET release film by adopting blade coating; and (3) volatilizing moisture in the slurry by adopting hot air to form the coating.
The two coatings are attached to each other, a parallel steel strip continuous vulcanizing machine is adopted, the hot pressing temperature is 150 ℃, and the pressure is 11 Mpa.
Example 3
Mixing 30 parts of polyvinyl alcohol with alcoholysis degree of 96 with 300 parts of water, stirring, heating to 85 ℃ in a water bath, preserving heat for 1 hour, and cooling to normal temperature;
and then sequentially adding 1 part of defoaming agent containing peroxide, 95 parts of ferrum-silicon-aluminum powder, 10 parts of glycerol, 0.05 part of triallyl isocyanurate and 10 parts of acrylamide modified polyvinyl alcohol, and fully stirring for 0.5h to obtain the water-soluble wave-absorbing slurry.
Coating the water-soluble wave-absorbing slurry on a PET release film by adopting blade coating; and (3) volatilizing moisture in the slurry by adopting hot air to form the coating.
The two coatings are attached to each other by a drum vulcanizer, the hot pressing temperature is 195 ℃ and the pressure is 10 Mpa.
Example 4
The coating prepared in example 3 was subjected to simulated recycling: and peeling the coating from the PET release film, mixing 300 parts of water, stirring, heating to 100 ℃ in a water bath, preserving heat for 1h, and cooling to normal temperature to obtain the recycled water-soluble wave-absorbing slurry.
Coating the recycled water-soluble wave-absorbing slurry on a PET release film by adopting blade coating; and (3) volatilizing moisture in the slurry by adopting hot air to form the coating.
The two coatings are attached to each other by a drum vulcanizer, the hot pressing temperature is 195 ℃ and the pressure is 10 Mpa.
Comparative example 1
And (3) fully stirring 90 parts of ferrosilicon aluminum powder, 20 parts of waterborne polyurethane, 2 parts of enclosed waterborne isocyanate and 160 parts of water for 0.5h to obtain the waterborne wave-absorbing slurry.
Coating the water-based wave-absorbing slurry on a PET release film by adopting blade coating; and (3) volatilizing moisture in the slurry by adopting hot air to form the coating.
The two coatings are attached to each other by a drum vulcanizer, the hot pressing temperature is 195 ℃ and the pressure is 10 Mpa.
Comparative example 2
The coating prepared in comparative example 1 was subjected to simulated recycling: and peeling the coating from the PET release film, mixing 300 parts of water, stirring, heating to 100 ℃ in a water bath, preserving the heat for 1h, cooling to normal temperature, and enabling the adhesive film to swell and be incapable of dissolving, preparing into slurry and recycling.
The microwave absorbing films obtained in the examples 1 to 4, the comparative example 1 and the comparative example 2 are subjected to performance tests such as coating surface, single-layer thickness, double-layer opposite-pasting vulcanized film thickness, density, alcohol resistance, butanone resistance, magnetic permeability (1MHz) and the like, and specific test results are shown in the following table 1.
TABLE 1 testing of the Properties
As can be seen from table 1, the wave-absorbing film prepared by the prior art of comparative example 1 had oil spots, was separated from the bonded interface, and was not recyclable. In comparative example 2, the recovered adhesive film was only swollen, and could not be dissolved, and could not be made into slurry, and the single-layer thickness (mm) and the double-layer opposite-adhered vulcanized film thickness (mm) obtained by testing coarse massive waste products formed by randomly extracting the adhesive film were larger. The wave-absorbing film disclosed by the invention has the advantages of no oil stain, uniformity, flatness, high density, no layering, alcohol resistance and butanone resistance, can be used for manufacturing a film with high magnetic conductivity and can be recycled, and the defects of oil stain, laminating, vulcanization and layering, low product density, incapability of recycling and the like of a water-based system film adhesive film in the prior art are overcome.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The water-soluble wave-absorbing slurry is characterized by comprising the following components in parts by weight:
2. the water-soluble wave-absorbing slurry according to claim 1, wherein the wave-absorbing agent is at least one selected from the group consisting of nickel-zinc ferrite powder, manganese-zinc ferrite powder, iron-silicon-aluminum powder, iron-nickel-molybdenum powder, iron-silicon-chromium powder, and carbonyl iron powder.
3. The water-soluble wave-absorbing slurry according to claim 1, wherein the preparation method of the acrylamide modified polyvinyl alcohol comprises the following steps: mixing 5-15 parts of polyvinyl alcohol with 60-120 parts of water, stirring, heating to 80-100 ℃, preserving heat for 1-2 hours, adding 0.01-0.5 part of acrylamide, slowly dropwise adding 10ml of 0.1% sodium persulfate aqueous solution, dispersing for 1-3 hours by using a wheel disc after the addition is finished, and cooling to obtain the polyvinyl alcohol.
4. The water-soluble wave-absorbing slurry according to claim 1, wherein the preparation of the peroxide-containing antifoaming agent comprises the following steps: a. preparing the following raw materials in parts by weight: 20-30 parts of stearic acid monoglyceride, 20-30 parts of dicumyl peroxide, 1-5 parts of sorbitan laurate and 35-70 parts of water; b. mixing, stirring and heating the components to 75-80 ℃ according to parts by weight, stirring at constant temperature for 0.5-1 h, and cooling to obtain the high-performance composite material.
5. The water-soluble wave-absorbing slurry according to claim 1, wherein said cross-linking agent is at least one selected from the group consisting of triallyl isocyanurate and di-t-butyl peroxide.
6. A method for preparing a water soluble wave absorbing slurry according to any one of claims 1 to 5 comprising the steps of: mixing 5-30 parts of polyvinyl alcohol with alcoholysis degree of 96-100 with 10-300 parts of water, stirring, heating to 85-100 ℃ in a water bath, preserving heat for 1-3 hours, and cooling to normal temperature; and then sequentially adding 0.05-1 part of defoaming agent containing peroxide, 70-95 parts of wave absorbing agent, 0.5-10 parts of glycerol, 1-10 parts of acrylamide modified polyvinyl alcohol and 0.01-0.05 part of cross-linking agent, and fully stirring for 0.5-4 hours to obtain the water-soluble wave absorbing slurry.
7. A wave-absorbing film, characterized in that the wave-absorbing film is prepared from the water-soluble wave-absorbing slurry of any one of claims 1 to 5.
8. A preparation method of the wave-absorbing film of claim 7, which is characterized by comprising the following steps: s1, coating the water-soluble wave-absorbing slurry on a base material; s2, volatilizing moisture in the slurry in a natural wind, hot air, infrared ray or microwave mode to form a coating; and S3, attaching the two coatings oppositely, and vulcanizing at high temperature to obtain the coating.
9. The preparation method according to claim 8, wherein the wave-absorbing film is a sheet, and the step S3 is: the two coatings are attached to each other by a flat vulcanizing machine, the hot pressing temperature is 140-.
10. The preparation method according to claim 8, wherein the wave-absorbing film is a coiled material, and the step S3 is as follows:
the two coatings are attached to each other by adopting a parallel steel belt continuous vulcanizing machine or a drum vulcanizing machine, the hot pressing temperature is 150-.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105199591A (en) * | 2015-09-22 | 2015-12-30 | 天长市开林化工有限公司 | Water-resistant acrylate modified waterborne polyurethane emulsion paint |
| CN108699378A (en) * | 2018-04-25 | 2018-10-23 | 深圳鹏汇功能材料有限公司 | Aqueous wave absorbing coating and its preparation method and application |
| CN110157316A (en) * | 2019-05-29 | 2019-08-23 | 浙江康廷电子科技有限公司 | Heat-insulated suction wave material of one kind and preparation method thereof |
| CN113438884A (en) * | 2021-06-23 | 2021-09-24 | 浙江原邦材料科技有限公司 | Water-based high-permeability wave-absorbing plate and preparation method thereof |
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2022
- 2022-01-25 CN CN202210086573.5A patent/CN114316697A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105199591A (en) * | 2015-09-22 | 2015-12-30 | 天长市开林化工有限公司 | Water-resistant acrylate modified waterborne polyurethane emulsion paint |
| CN108699378A (en) * | 2018-04-25 | 2018-10-23 | 深圳鹏汇功能材料有限公司 | Aqueous wave absorbing coating and its preparation method and application |
| CN110157316A (en) * | 2019-05-29 | 2019-08-23 | 浙江康廷电子科技有限公司 | Heat-insulated suction wave material of one kind and preparation method thereof |
| CN113438884A (en) * | 2021-06-23 | 2021-09-24 | 浙江原邦材料科技有限公司 | Water-based high-permeability wave-absorbing plate and preparation method thereof |
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