CN109880296A - A method of reverse-engineering negative dielectric material in metal mesh/epoxy resin composite material - Google Patents
A method of reverse-engineering negative dielectric material in metal mesh/epoxy resin composite material Download PDFInfo
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- CN109880296A CN109880296A CN201910155783.3A CN201910155783A CN109880296A CN 109880296 A CN109880296 A CN 109880296A CN 201910155783 A CN201910155783 A CN 201910155783A CN 109880296 A CN109880296 A CN 109880296A
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Abstract
The invention discloses a kind of methods that negative dielectric material is reverse-engineered in metal mesh/epoxy resin composite material, it includes following steps: step 1, several metal meshes are put into the acid solution of known concentration, acid solution is made to corrode the different time respectively to the metal mesh；Step 2, after mixing by liquid-state epoxy resin and organic solvent, curing agent is added and mixes, obtains mixed liquor；Step 3, the metal mesh after acid solution being corroded immerses the mixed liquor respectively, penetrates into epoxy resin in metal mesh；Obtain metal mesh/epoxy resin composite material；Step 4, metal mesh/epoxy resin composite material is dried under vacuum conditions；Step 5, metal mesh/epoxy resin composite material negative permittivity in detecting step 4 after drying, if it does not meet the requirements, step 1 is then repeated to step 4, and the time that acid solution corrodes metal mesh is redesigned, until the satisfactory metal mesh/epoxy resin composite material of negative permittivity is prepared.
Description
Technical field
The present invention relates to technical field of composite materials and with Meta Materials field, and in particular to one kind in metal mesh/asphalt mixtures modified by epoxy resin
The method of negative dielectric material is reverse-engineered in resin composite material.
Background technique
Negative dielectric material due to its plasmon bio-sensing, dielectric constant enhancing and in terms of
New opplication is obtaining extensive concern nearly ten years.In fact, the development of negative dielectric material and Meta Materials have close pass
System, when negative dielectric material when negative magnetic-inductive capacity material combines, it can be achieved that unique negative refraction.Meta Materials are by designing its week
Regulation of the shape (U-shaped, split ring resonator, fishing net) and pattern of rows and columns and then realization of phase property array to its electromagnetic performance.It is very long
In a period of time, Meta Materials are mainly studied in physics and communication field.
However, the regulation to negative electricity magnetic parameter also may be implemented by the chemical composition and microstructure of control material, because
This, negative electricity magnetic parameter also causes to pay close attention in the conductor-insulator composite material of no harmonic compoment structure.These study also pole
The earth promotes the development of negative dielectric material in Materials Science and Engineering.Typical material processing method is to prepare negative dielectric material
A kind of more free effective way is provided, by controlling the chemical component of material and bearing for the adjustable material of microstructure
Dielectric constant performance.Theoretical analysis shows that negative permittivity is material microstructure variation as a result, in the process, it is conductive
Free electron in network vibrates.With the increase of conductive filler (metal or carbon material) in composite material, filler is mutual
Contact forms conductive network, to form negative permittivity, this is that one kind typically exceedes infiltration phenomenon.The structure of three-dimensional conductive network
Build is the key that realize negative permittivity material.
Previous research, which is concentrated mainly on, designs negative dielectric material by " increasing material manufacturing ", i.e., is led by addition in the base
Electric particle, when the content of conductive phase is more than but after still close to excess effusion value, conductive phase becomes continuous phase, and dielectric constant becomes negative value.
But influenced by infiltration effect is exceeded, negative permittivity is very sensitive to the content of conductive phase, it is not easy to realize to negative dielectric properties
Accuracy controlling.
Summary of the invention
The purpose of the present invention is overcoming the deficiencies of existing technologies, provide a kind of negative dielectric properties easy to accomplish to material into
The method of row regulation, this method simple process, manufacturing cost is low, is capable of the negative dielectric properties of accuracy controlling composite material.
In order to achieve the above object, the present invention provides one kind reverse-engineers in metal mesh/epoxy resin composite material
The method of negative dielectric material, it includes following steps, step 1: several metal meshes being put into the acid solution of known concentration, are made
Acid solution corrodes the metal mesh the different time respectively, and the time is corroded metal mesh with acid solution completely to be limited；Step 2:
After mixing by liquid-state epoxy resin and organic solvent, curing agent is added and mixes, obtains mixed liquor；Step 3: by acid solution
Metal mesh after corrosion immerses the mixed liquor respectively, penetrates into epoxy resin in metal mesh, it is multiple to obtain metal mesh/epoxy resin
Condensation material；Step 4: drying metal mesh/epoxy resin composite material under vacuum conditions；Step 5: dry in detecting step 4
Metal mesh/epoxy resin composite material negative permittivity afterwards then repeats step 1 to step 4 if it does not meet the requirements, and
The time that acid solution corrodes metal mesh is redesigned, until the satisfactory metal mesh/epoxy of negative permittivity is prepared
Resin composite materials.
Preferably, the metal mesh includes one of nickel screen, copper mesh or iron net in step 1.
Preferably, the acid solution is hydrochloric acid solution in step 1.
Preferably, the mass fraction of hydrochloric acid is 18.5%~28.5% in the hydrochloric acid solution in step 1.
Preferably, the organic solvent is ethyl alcohol in step 2.
Preferably, the temperature of the liquid-state epoxy resin and organic solvent mixing is 40~60 DEG C in step 2.
Preferably, after metal mesh immerses the mixed liquor, metal mesh being put into vacuum environment in step 3, makes epoxy resin
It penetrates into metal mesh.
Preferably, in step 3, it is 1-3 hours that metal mesh, which is put into the time in vacuum environment,.
Preferably, the temperature of the drying is 120 DEG C in step 4, the time of the drying is 5h.
Preferably, the method also includes step 6: according to the satisfactory metal mesh of negative permittivity be corroded when
Between, corrode acid solution to metal mesh, and according to step 2 to 4 repeat prepare the satisfactory metal mesh of negative permittivity/
Epoxy resin composite material.
The utility model has the advantages that
(1) the method and process letter of the invention that negative dielectric material is reverse-engineered in metal mesh/epoxy resin composite material
It is single, it is at low cost, the mass production of product may be implemented, there is good commercial promise.
(2) reverse-engineer accuracy controlling composite material negative permittivity performance, by change Acids eat metals net when
Between, i.e., changeable negative permittivity numerical value, the regulation of negative permittivity performance is simply.
(3) net metal makes composite material have certain mechanical strength, is easily processed into required shape.
Detailed description of the invention
Fig. 1 is the comparison diagram of scanning electron microscope when nickel screen is not corroded and corrodes 10 hours in embodiment 1, wherein Fig. 1's
(a) scanning electron microscope (SEM) photograph when not being corroded for nickel screen, (b) of Fig. 1 are scanning electron microscope (SEM) photograph when nickel screen is corroded 10 hours.
Fig. 2 is nickel screen/epoxy resin composite material real part of permittivity ε ' map varying with frequency of embodiment 1.
Specific embodiment
To keep detailed process and advantage of the invention clearer, it is described in detail below in conjunction with specific embodiment.
It should be understood that these embodiments are to be not limited to limit the scope of the invention for illustrating the present invention.Implementation used in the examples
Condition can further be adjusted according to actual conditions, and the implementation condition being not specified is usually the condition in routine experiment.
The present invention provides one kind " subtracting material manufacture " method and prepares negative dielectric material, and already existing network is passed through chemical method
Or the method for material processing weakens, and so as to accurately control the value of negative permittivity in a certain range, this method
It is called the method for reverse-engineering the material with negative permittivity, this method simple process, manufacturing cost is low.
The method that negative dielectric material is reverse-engineered in metal mesh/epoxy resin composite material of the invention, selection have
The active metal mesh of good chemical, the metal mesh can react with acid, and pass through " subtracting material manufacture ", i.e. control metal mesh and acid
Reaction time is, it can be achieved that reverse-engineer negative dielectric material.During reverse engineer, network gradually weakens even negative dielectric material
It destroys completely.In addition, epoxy resin has good insulating properties, it is selected as metal mesh/epoxy resin composite material matrix, can be assigned
Give the certain mechanical strength of composite material.The "/" indicates that composite material is formed by metal mesh and polymerization of epoxy resins.
The materials, reagents and the like used in the following examples is commercially available.Wherein, the hydrochloric acid solution used
Mass fraction 18.5%~28.5%.In the present invention, the mass fraction of hydrochloric acid solution is not limited to 18.5%~28.5%, such as
Fruit concentration of hydrochloric acid solution is lower, then extends the metal erosion time；If concentration of hydrochloric acid solution is higher, when reducing metal erosion
Between.
Embodiment 1
A method of it reverse-engineering negative dielectric material in nickel screen/epoxy resin composite material, comprises the following steps that
(1) nickel screen is cleaned by ultrasonic with alcohol.Hydrochloric acid solution is prepared simultaneously.Then nickel screen is put into hydrochloric acid solution, respectively
Corrosion 2,4,10,11 hours.The time for corroding nickel screen is longer, stronger to nickel screen structural damage power.(a) of Fig. 1 be nickel screen not
The scanning electron microscope (SEM) photograph of corrosion, (b) of Fig. 1 are scanning electron microscope (SEM) photograph when nickel screen is corroded 10 hours, can from scanning electron microscope (SEM) photograph
Out, nickel wire attenuates and is even broken.
(2) 5g liquid-state epoxy resin is mixed with 2g alcohol, to reduce epoxy resin viscosity, and in epoxy resin solution
0.2g curing agent is added, stirring to solution is clarified at 60 DEG C.
(3) nickel screen after corrosion in step (1) is immersed in step (2) epoxy resin solution, vacuumizes 1-3 hours, makes
Epoxy resin fully penetrates into nickel screen, the nickel screen/epoxy resin composite material arrived.
(4) nickel screen/epoxy resin composite material that step (3) obtains dry 5h at 120 DEG C of vacuum oven.Fig. 2 is
Nickel screen/epoxy resin composite material real part of permittivity ε ' map varying with frequency.It can be seen from the figure that nickel screen corrodes
Time is longer, and the numerical value of negative permittivity is smaller, until becoming positive dielectric from negative dielectric.
(5) finally, the method being machined into adds nickel screen/epoxy resin composite material according to part or application requirement
Work is at certain shape and size.
Embodiment 2
A method of it reverse-engineering negative dielectric material in copper mesh/epoxy resin composite material, comprises the following steps that
(1) copper mesh is cleaned by ultrasonic with alcohol.Hydrochloric acid solution is prepared simultaneously.Then copper mesh is put into hydrochloric acid solution, respectively
Corrosion 2,4,6,8 hours.
(2) 5g liquid-state epoxy resin is mixed with 2g alcohol, to reduce epoxy resin viscosity, and in epoxy resin solution
0.2g curing agent is added, stirring to solution is clarified at 60 DEG C.
(3) copper mesh after corrosion in step (1) is immersed in step (2) epoxy resin solution, vacuumizes 1-3 hours, makes
Epoxy resin penetrates into copper mesh, obtains copper mesh/epoxy resin composite material.
(4) copper mesh/epoxy resin composite material that step (3) obtains dry 5h at 120 DEG C of vacuum oven.
(5) finally, the method being machined into adds copper mesh/epoxy resin composite material according to part or application requirement
Work is at certain shape and size.
Embodiment 3
A method of it reverse-engineering negative dielectric material in iron net/epoxy resin composite material, comprises the following steps that
(1) iron net is cleaned by ultrasonic with alcohol.Hydrochloric acid solution is prepared simultaneously.Then iron net is put into hydrochloric acid solution, respectively
Corrosion 1,2,3,4 hour.
(2) 5g liquid-state epoxy resin is mixed with 2g alcohol, to reduce epoxy resin viscosity, and in epoxy resin solution
0.2g curing agent is added, stirring to solution is clarified at 60 DEG C.
(3) iron net after corrosion in step (1) is immersed in step (2) epoxy resin solution, vacuumizes 1-3 hours, makes
Epoxy resin penetrates into iron net, obtains iron net/epoxy resin composite material.
(4) iron net/epoxy resin composite material that step (3) obtains dry 5h at 120 DEG C of vacuum oven.
(5) finally, the method being machined into adds iron net/epoxy resin composite material according to part or application requirement
Work is at certain shape and size.
In above-described embodiment, it can obtain negative permittivity by the reaction time of control metal mesh and acid solution and conform to
The composite material asked.Net metal also makes composite material have certain mechanical strength, is easily processed into required shape.
In conclusion method of the invention is using epoxy resin as matrix, to be electricity with the active metal mesh of good chemical
Magnetic function body prepares metal mesh/epoxy resin composite wood that dielectric constant is negative value using chemical attack and in-situ polymerization technique
Material, simple process, manufacturing cost is low, in application fields such as microwave absorption, Meta Materials and wireless power transmissions, has important grind
Study carefully value and vast market prospect.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a kind of method for reverse-engineering negative dielectric material in metal mesh/epoxy resin composite material, which is characterized in that include
Following steps,
Step 1: several metal meshes being put into the acid solution of known concentration, corrode acid solution respectively not to the metal mesh
The same time, the time is corroded metal mesh with acid solution completely to be limited；
Step 2: after mixing by liquid-state epoxy resin and organic solvent, curing agent is added and mixes, obtains mixed liquor；
Step 3: the metal mesh after acid solution is corroded immerses the mixed liquor respectively, penetrates into epoxy resin in metal mesh, obtains
To metal mesh/epoxy resin composite material；
Step 4: drying metal mesh/epoxy resin composite material under vacuum conditions；
Step 5: metal mesh/epoxy resin composite material negative permittivity after dry in detecting step 4 is wanted if do not met
It asks, then repeats step 1 to step 4, and redesign the time that acid solution corrodes metal mesh, until it is normal that negative dielectric is prepared
Satisfactory metal mesh/the epoxy resin composite material of number.
2. the method according to claim 1 that negative dielectric material is reverse-engineered in metal mesh/epoxy resin composite material,
It is characterized in that, the metal mesh includes one of nickel screen, copper mesh or iron net in step 1.
3. the method according to claim 1 that negative dielectric material is reverse-engineered in metal mesh/epoxy resin composite material,
It is characterized in that, the acid solution is hydrochloric acid solution in step 1.
4. the method according to claim 3 that negative dielectric material is reverse-engineered in metal mesh/epoxy resin composite material,
It is characterized in that, the mass fraction of hydrochloric acid is 18.5%~28.5% in the hydrochloric acid solution in step 1.
5. the method according to claim 1 that negative dielectric material is reverse-engineered in metal mesh/epoxy resin composite material,
It is characterized in that, the organic solvent is ethyl alcohol in step 2.
6. the method according to claim 1 that negative dielectric material is reverse-engineered in metal mesh/epoxy resin composite material,
It is characterized in that, the temperature of the liquid-state epoxy resin and organic solvent mixing is 40~60 DEG C in step 2.
7. the method according to claim 1 that negative dielectric material is reverse-engineered in metal mesh/epoxy resin composite material,
It is characterized in that, after metal mesh immerses the mixed liquor, metal mesh being put into vacuum environment in step 3, penetrates into epoxy resin
In metal mesh.
8. the method according to claim 7 that negative dielectric material is reverse-engineered in metal mesh/epoxy resin composite material,
It is characterized in that, in step 3, it is 1-3 hours that metal mesh, which is put into the time in vacuum environment,.
9. the method according to claim 1 that negative dielectric material is reverse-engineered in metal mesh/epoxy resin composite material,
It is characterized in that, the temperature of the drying is 120 DEG C in step 4, the time of the drying is 5h.
10. the side according to claim 1 for reverse-engineering negative dielectric material in metal mesh/epoxy resin composite material
Method, which is characterized in that the method also includes step 6: according to the satisfactory metal mesh of negative permittivity be corroded when
Between, corrode acid solution to metal mesh, and according to step 2 to 4 repeat prepare the satisfactory metal mesh of negative permittivity/
Epoxy resin composite material.
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| CN201910155783.3A CN109880296B (en) | 2019-03-01 | 2019-03-01 | Method for reversely designing negative dielectric material in metal mesh/epoxy resin composite material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112389038A (en) * | 2020-10-26 | 2021-02-23 | 上海海事大学 | High-dielectric and low-loss material based on capacitance and inductance synergistic effect and preparation method thereof |
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| CN108641358A (en) * | 2018-05-17 | 2018-10-12 | 合肥工业大学 | A kind of preparation method of the carbon nano-tube/poly diphenyl sulfide with negative permittivity |
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2019
- 2019-03-01 CN CN201910155783.3A patent/CN109880296B/en active Active
Patent Citations (2)
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| CN108641358A (en) * | 2018-05-17 | 2018-10-12 | 合肥工业大学 | A kind of preparation method of the carbon nano-tube/poly diphenyl sulfide with negative permittivity |
| CN108929542A (en) * | 2018-08-09 | 2018-12-04 | 上海海事大学 | A kind of dimethyl silicone polymer with negative permittivity/graphene flexible composite film and preparation method thereof |
Non-Patent Citations (1)
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| ZHI-CHENG SHI，ET AL: ""Tunable radio-frequency negative permittivity in nickel-alumina "natural" meta-composites"", 《APPLIED PHYSICS LETTERS》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112389038A (en) * | 2020-10-26 | 2021-02-23 | 上海海事大学 | High-dielectric and low-loss material based on capacitance and inductance synergistic effect and preparation method thereof |
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