CN113185799A - Composite material with electromagnetic shielding function and preparation method thereof - Google Patents
Composite material with electromagnetic shielding function and preparation method thereof Download PDFInfo
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- CN113185799A CN113185799A CN202110468436.3A CN202110468436A CN113185799A CN 113185799 A CN113185799 A CN 113185799A CN 202110468436 A CN202110468436 A CN 202110468436A CN 113185799 A CN113185799 A CN 113185799A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/06—Polystyrene
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- C08K2201/001—Conductive additives
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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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
Abstract
The invention discloses a composite material with an electromagnetic shielding function and a preparation method thereof, wherein the composite material comprises the following components in parts by weight: 10-20 parts of epoxy resin, 15-25 parts of amino resin, 20-30 parts of thermoplastic polyurethane elastomer rubber, 30-0 part of phenolic resin, 30-50 parts of polystyrene resin, 10-15 parts of ethylene-vinyl acetate copolymer, 4-8 parts of dibutyl phthalate, 2-4 parts of cellulose acetate micropowder, 2-6 parts of zinc stearate micropowder, 10-20 parts of epoxide stabilizer, 20-26 parts of mercury chloride, 50-90 parts of electromagnetic shielding filler and 4-6 parts of filler. The invention belongs to the technical field of electromagnetic shielding materials, and particularly provides a composite material with an electromagnetic shielding function, which is good in electromagnetic shielding effect, strong in stability and good in flame retardant effect.
Description
Technical Field
The invention belongs to the technical field of electromagnetic shielding materials, and particularly relates to a composite material with an electromagnetic shielding function and a preparation method thereof.
Background
With the rapid development of the electronics industry, the number of various electronic products for civil and military use has sharply increased, and electromagnetic interference (EMI) has become a social public nuisance. Plastics are used as housing materials for electronic products because of their advantages of light weight, corrosion resistance, low cost, good moldability, etc. However, common plastics are insulators, on one hand, accumulate static charges, are easy to cause fire and explosion in flammable and explosive places, and on the other hand, the common plastics are almost transparent to electromagnetic waves, cannot absorb and reflect the electromagnetic waves, have no shielding capability and have no anti-EMI performance. Therefore, the research on the novel shielding plastic with good conductivity and good processability greatly accelerates the process of manufacturing the shell of the electronic instrument by replacing metal materials with engineering plastics, provides good means and guarantee for military affairs, communication, confidentiality, computer system engineering, electronic control engineering, bioengineering and high-tech electromagnetic compatibility, and has great significance for social life and national defense construction.
Disclosure of Invention
In order to solve the existing problems, the invention particularly provides the composite material with the electromagnetic shielding function, which has the advantages of good electromagnetic shielding effect, strong stability and good flame-retardant effect.
The technical scheme adopted by the invention is as follows: a composite material with an electromagnetic shielding function comprises the following components in parts by weight: 10-20 parts of epoxy resin, 15-25 parts of amino resin, 20-30 parts of thermoplastic polyurethane elastomer rubber, 30-0 part of phenolic resin, 30-50 parts of polystyrene resin, 10-15 parts of ethylene-vinyl acetate copolymer, 4-8 parts of dibutyl phthalate, 2-4 parts of cellulose acetate micropowder, 2-6 parts of zinc stearate micropowder, 10-20 parts of epoxide stabilizer, 20-26 parts of mercury chloride, 50-90 parts of electromagnetic shielding filler and 4-6 parts of filler.
Further, the electromagnetic shielding filler is one or more of conductive graphite, carbon nanotubes and carbon fibers.
Preferably, the electromagnetic shielding filler comprises the following components in parts by weight: 10-35 parts of conductive graphite, 20-35 parts of carbon nanotubes and 20-45 parts of carbon fibers.
Further, the filler is one or more of nano active calcium carbonate and light active calcium carbonate; the particle size of the nano active calcium carbonate is 30-40nm, and the particle size of the light active calcium carbonate is 350-500-mesh sieve.
The invention also discloses a preparation method of the composite material with the electromagnetic shielding function, which comprises the following steps:
1) the raw materials are respectively weighed according to the following proportions: 10-20 parts of epoxy resin, 15-25 parts of amino resin, 20-30 parts of thermoplastic polyurethane elastomer rubber, 30-50 parts of phenolic resin, 30-50 parts of polystyrene resin, 10-15 parts of ethylene-vinyl acetate copolymer, 4-8 parts of dibutyl phthalate, 2-4 parts of cellulose acetate micropowder, 2-6 parts of zinc stearate micropowder, 10-20 parts of epoxide stabilizer, 20-26 parts of mercury chloride, 50-90 parts of electromagnetic shielding filler and 4-6 parts of filler;
2) premixing the weighed epoxy resin, amino resin, thermoplastic polyurethane elastomer rubber, phenolic resin, polystyrene resin, zinc stearate micro powder, mercuric chloride and electromagnetic shielding filler to obtain a premix;
3) uniformly mixing the premix obtained in the step 2) with the weighed ethylene-vinyl acetate copolymer, dibutyl phthalate, cellulose acetate micro powder, an epoxide stabilizer and a filling material to obtain a mixture, and extruding the mixture through an extruder to obtain the composite material with the electromagnetic shielding function.
Further, the premixing in the step 2) is ball milling, mechanical stirring, mechanical shearing or solution mixing.
By adopting the scheme, the invention has the following beneficial effects: the composite material with the electromagnetic shielding function uniformly disperses and mixes the electromagnetic shielding filler, has high electromagnetic shielding performance, effective mildew resistance and flame retardance, strong stability, no combustion or deformation when meeting fire, good fire insulation, simple preparation process and easy operation; meanwhile, various properties of the composite material are obviously improved through the carbon fibers on the basis of not obviously increasing the material cost.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiment 1, the composite material with electromagnetic shielding function of the present invention comprises the following components by weight: 10 parts of epoxy resin, 15 parts of amino resin, 20 parts of thermoplastic polyurethane elastomer rubber, 30 parts of phenolic resin, 30 parts of polystyrene resin, 10 parts of ethylene-vinyl acetate copolymer, 4 parts of dibutyl phthalate, 2 parts of cellulose acetate micropowder, 2 parts of zinc stearate micropowder, 10 parts of epoxy stabilizer, 20 parts of mercuric chloride, 50 parts of electromagnetic shielding filler and 4 parts of filler.
The preparation method of the composite material with the electromagnetic shielding function comprises the following steps:
1) the raw materials are respectively weighed according to the following proportions: 10 parts of epoxy resin, 15 parts of amino resin, 20 parts of thermoplastic polyurethane elastomer rubber, 30 parts of phenolic resin, 30 parts of polystyrene resin, 10 parts of ethylene-vinyl acetate copolymer, 4 parts of dibutyl phthalate, 2 parts of cellulose acetate micropowder, 2 parts of zinc stearate micropowder, 10 parts of epoxide stabilizer, 20 parts of mercuric chloride, 50 parts of electromagnetic shielding filler and 4 parts of filler;
2) premixing the weighed epoxy resin, amino resin, thermoplastic polyurethane elastomer rubber, phenolic resin, polystyrene resin, zinc stearate micro powder, mercuric chloride and electromagnetic shielding filler to obtain a premix;
3) uniformly mixing the premix obtained in the step 2) with the weighed ethylene-vinyl acetate copolymer, dibutyl phthalate, cellulose acetate micro powder, an epoxide stabilizer and a filling material to obtain a mixture, and extruding the mixture through an extruder to obtain the composite material with the electromagnetic shielding function.
Embodiment 2, the composite material with electromagnetic shielding function of the present invention comprises the following components by weight: 15 parts of epoxy resin, 20 parts of amino resin, 25 parts of thermoplastic polyurethane elastomer rubber, 40 parts of phenolic resin, 40 parts of polystyrene resin, 12 parts of ethylene-vinyl acetate copolymer, 6 parts of dibutyl phthalate, 3 parts of cellulose acetate micropowder, 4 parts of zinc stearate micropowder, 15 parts of epoxide stabilizer, 23 parts of mercuric chloride, 70 parts of electromagnetic shielding filler and 5 parts of filler.
The preparation method of the composite material with the electromagnetic shielding function comprises the following steps:
1) the raw materials are respectively weighed according to the following proportions: 15 parts of epoxy resin, 20 parts of amino resin, 25 parts of thermoplastic polyurethane elastomer rubber, 40 parts of phenolic resin, 40 parts of polystyrene resin, 12 parts of ethylene-vinyl acetate copolymer, 6 parts of dibutyl phthalate, 3 parts of cellulose acetate micropowder, 4 parts of zinc stearate micropowder, 15 parts of epoxide stabilizer, 23 parts of mercuric chloride, 70 parts of electromagnetic shielding filler and 5 parts of filler;
2) premixing the weighed epoxy resin, amino resin, thermoplastic polyurethane elastomer rubber, phenolic resin, polystyrene resin, zinc stearate micro powder, mercuric chloride and electromagnetic shielding filler to obtain a premix;
3) uniformly mixing the premix obtained in the step 2) with the weighed ethylene-vinyl acetate copolymer, dibutyl phthalate, cellulose acetate micro powder, an epoxide stabilizer and a filling material to obtain a mixture, and extruding the mixture through an extruder to obtain the composite material with the electromagnetic shielding function.
Embodiment 3, the composite material with electromagnetic shielding function of the present invention comprises the following components by weight: 20 parts of epoxy resin, 25 parts of amino resin, 30 parts of thermoplastic polyurethane elastomer rubber, 50 parts of phenolic resin, 50 parts of polystyrene resin, 15 parts of ethylene-vinyl acetate copolymer, 8 parts of dibutyl phthalate, 4 parts of cellulose acetate micropowder, 6 parts of zinc stearate micropowder, 20 parts of epoxy stabilizer, 26 parts of mercuric chloride, 90 parts of electromagnetic shielding filler and 6 parts of filler.
The preparation method of the composite material with the electromagnetic shielding function comprises the following steps:
1) the raw materials are respectively weighed according to the following proportions: 20 parts of epoxy resin, 25 parts of amino resin, 30 parts of thermoplastic polyurethane elastomer rubber, 50 parts of phenolic resin, 50 parts of polystyrene resin, 15 parts of ethylene-vinyl acetate copolymer, 8 parts of dibutyl phthalate, 4 parts of cellulose acetate micropowder, 6 parts of zinc stearate micropowder, 20 parts of epoxy stabilizer, 26 parts of mercuric chloride, 90 parts of electromagnetic shielding filler and 6 parts of filler;
2) premixing the weighed epoxy resin, amino resin, thermoplastic polyurethane elastomer rubber, phenolic resin, polystyrene resin, zinc stearate micro powder, mercuric chloride and electromagnetic shielding filler to obtain a premix;
3) uniformly mixing the premix obtained in the step 2) with the weighed ethylene-vinyl acetate copolymer, dibutyl phthalate, cellulose acetate micro powder, an epoxide stabilizer and a filling material to obtain a mixture, and extruding the mixture through an extruder to obtain the composite material with the electromagnetic shielding function.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. The composite material with the electromagnetic shielding function is characterized by comprising the following components in parts by weight: 10-20 parts of epoxy resin, 15-25 parts of amino resin, 20-30 parts of thermoplastic polyurethane elastomer rubber, 30-0 part of phenolic resin, 30-50 parts of polystyrene resin, 10-15 parts of ethylene-vinyl acetate copolymer, 4-8 parts of dibutyl phthalate, 2-4 parts of cellulose acetate micropowder, 2-6 parts of zinc stearate micropowder, 10-20 parts of epoxide stabilizer, 20-26 parts of mercury chloride, 50-90 parts of electromagnetic shielding filler and 4-6 parts of filler.
2. The composite material with electromagnetic shielding function of claim 1, wherein the electromagnetic shielding filler is one or more of conductive graphite, carbon nanotube and carbon fiber.
3. The composite material with electromagnetic shielding function of claim 2, wherein the electromagnetic shielding filler comprises the following components by weight: 10-35 parts of conductive graphite, 20-35 parts of carbon nanotubes and 20-45 parts of carbon fibers.
4. The composite material with electromagnetic shielding function of claim 1, wherein the filler is one or more of nano active calcium carbonate and light active calcium carbonate; the particle size of the nano active calcium carbonate is 30-40nm, and the particle size of the light active calcium carbonate is 350-500-mesh sieve.
5. A preparation method of a composite material with an electromagnetic shielding function is characterized by comprising the following steps:
1) the raw materials are respectively weighed according to the following proportions: 10-20 parts of epoxy resin, 15-25 parts of amino resin, 20-30 parts of thermoplastic polyurethane elastomer rubber, 30-50 parts of phenolic resin, 30-50 parts of polystyrene resin, 10-15 parts of ethylene-vinyl acetate copolymer, 4-8 parts of dibutyl phthalate, 2-4 parts of cellulose acetate micropowder, 2-6 parts of zinc stearate micropowder, 10-20 parts of epoxide stabilizer, 20-26 parts of mercury chloride, 50-90 parts of electromagnetic shielding filler and 4-6 parts of filler;
2) premixing the weighed epoxy resin, amino resin, thermoplastic polyurethane elastomer rubber, phenolic resin, polystyrene resin, zinc stearate micro powder, mercuric chloride and electromagnetic shielding filler to obtain a premix;
3) uniformly mixing the premix obtained in the step 2) with the weighed ethylene-vinyl acetate copolymer, dibutyl phthalate, cellulose acetate micro powder, an epoxide stabilizer and a filling material to obtain a mixture, and extruding the mixture through an extruder to obtain the composite material with the electromagnetic shielding function.
6. The method for preparing the composite material with the electromagnetic shielding function according to claim 5, wherein the premixing in the step 2) is ball milling, mechanical stirring, mechanical shearing or solution mixing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110468436.3A CN113185799A (en) | 2021-04-28 | 2021-04-28 | Composite material with electromagnetic shielding function and preparation method thereof |
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| CN202110468436.3A CN113185799A (en) | 2021-04-28 | 2021-04-28 | Composite material with electromagnetic shielding function and preparation method thereof |
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| CN103881290A (en) * | 2013-11-08 | 2014-06-25 | 东南大学 | Mildew-proof plastic |
| CN106928678A (en) * | 2015-12-30 | 2017-07-07 | 上海杰事杰新材料(集团)股份有限公司 | A kind of lightweight electromagnetic shielding makrolon material and preparation method thereof |
| CN109294106A (en) * | 2018-08-16 | 2019-02-01 | 海南联塑科技实业有限公司 | A kind of halogen-free flameproof electromagnetic shielding PVC electrical casing pipe |
| CN109334183A (en) * | 2018-10-22 | 2019-02-15 | 成都西达瑞电子科技有限公司 | Electromagnetic shielding composite material |
| CN110564107A (en) * | 2019-09-19 | 2019-12-13 | 四川大学 | Efficient electromagnetic shielding composite material and preparation method thereof |
| CN111454546A (en) * | 2020-04-26 | 2020-07-28 | 诺思贝瑞新材料科技（苏州）有限公司 | Electromagnetic shielding composite material and preparation method thereof |
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2021
- 2021-04-28 CN CN202110468436.3A patent/CN113185799A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304910A (en) * | 2013-06-24 | 2013-09-18 | 苏州新区佳合塑胶有限公司 | High-strength polystyrene conductive plastic and preparation method thereof |
| CN103881290A (en) * | 2013-11-08 | 2014-06-25 | 东南大学 | Mildew-proof plastic |
| CN103804844A (en) * | 2013-12-03 | 2014-05-21 | 宁波康氏塑料科技有限公司 | Electromagnetic shielding plastic and preparation method thereof |
| CN103642156A (en) * | 2013-12-04 | 2014-03-19 | 宁波康氏塑料科技有限公司 | Polyvinyl chloride composite with electromagnetic shielding function and preparation method of polyvinyl chloride composite |
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Application publication date: 20210730 |