CN111432620A - Electromagnetic shielding material with adsorption function and preparation method thereof - Google Patents
Electromagnetic shielding material with adsorption function and preparation method thereof Download PDFInfo
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- CN111432620A CN111432620A CN202010366763.3A CN202010366763A CN111432620A CN 111432620 A CN111432620 A CN 111432620A CN 202010366763 A CN202010366763 A CN 202010366763A CN 111432620 A CN111432620 A CN 111432620A
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- 239000000463 material Substances 0.000 title claims abstract description 94
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 91
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000000243 solution Substances 0.000 claims abstract description 47
- 239000011259 mixed solution Substances 0.000 claims abstract description 35
- 239000011159 matrix material Substances 0.000 claims abstract description 34
- 238000001035 drying Methods 0.000 claims abstract description 25
- 238000003756 stirring Methods 0.000 claims abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 99
- 239000002041 carbon nanotube Substances 0.000 claims description 44
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 44
- 229910002804 graphite Inorganic materials 0.000 claims description 25
- 239000010439 graphite Substances 0.000 claims description 25
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 24
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 24
- 239000000758 substrate Substances 0.000 claims description 21
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 16
- 239000006260 foam Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 239000001273 butane Substances 0.000 claims description 8
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000003463 adsorbent Substances 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 238000004887 air purification Methods 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
Abstract
The invention discloses an electromagnetic shielding material with an adsorption function, which comprises an electromagnetic shielding base body, wherein an adsorption layer is arranged on the outer surface of the electromagnetic shielding base body. Has the functions of adsorbing ozone and shielding electromagnetic interference. The preparation method of the electromagnetic shielding material with the adsorption function is further provided, and is implemented according to the following steps: step 1, firstly adding a carrier solution into a container, and then adding an adsorption material into the carrier solution to obtain a mixed solution A; and 2, placing the electromagnetic shielding matrix in the mixed solution A, stirring for a certain time at a certain temperature, taking out the electromagnetic shielding matrix with the adsorption material loaded on the surface from the mixed solution A, and drying to obtain the electromagnetic shielding material with the adsorption function.
Description
Technical Field
The invention belongs to the technical field of plasma application, and particularly relates to an electromagnetic shielding material with an adsorption function, and a preparation method of the electromagnetic shielding material with the adsorption function.
Background
The exhaust passage of the plasma air purification equipment on the market only has an exhaust function, but does not have O generated to the exhaust passage3Absorption function of (A), O3The strong oxidant discharged into the atmosphere is easy to damage the human body, and the problem of electromagnetic interference generated by the equipment to other electronic equipment cannot be solved, and the common solution is to use two different equipment to reduce O3Emissions and control of electromagnetic interference problems. The invention provides a method for simultaneously absorbing O3And a material for shielding electromagnetic interference, which is used for the exhaust passage of the plasma air purification equipment, so that the exhaust passage can reduce O3The exhaust and electromagnetic interference shielding function can simplify the structure of the purifying equipment.
Disclosure of Invention
The invention aims to provide an electromagnetic shielding material with an adsorption function, which has the functions of adsorbing ozone and shielding electromagnetic interference.
Another object of the present invention is to provide a method for preparing an electromagnetic shielding material with an adsorption function.
The invention adopts the technical scheme that the electromagnetic shielding material with the adsorption function comprises an electromagnetic shielding base body, wherein an adsorption layer is arranged on the outer surface of the electromagnetic shielding base body.
The present invention is also characterized in that,
the thickness of the adsorption layer is 0.5-5 microns.
The electromagnetic shielding matrix is a porous foam nickel matrix or a porous foam copper matrix;
the adsorption layer is a graphite layer or a carbon nanotube layer, wherein the graphite layer is composed of nano-scale graphite powder, the carbon nanotube layer is composed of carbon nanotubes, and the average tube diameter of the carbon nanotube layer is not more than 100 nm; or the adsorption layer is a mixed layer of graphite and carbon nanotubes, the mass ratio of the graphite to the carbon nanotubes in the mixed layer of graphite and carbon nanotubes is any ratio, wherein the graphite in the mixed layer of graphite and carbon nanotubes is nano-scale graphite powder, and the average pipe diameter of the carbon nanotubes in the mixed layer of graphite and carbon nanotubes is not more than 100 nm.
The invention adopts another technical scheme that the preparation method of the electromagnetic shielding material with the adsorption function is implemented according to the following steps:
and 2, placing the electromagnetic shielding matrix in the mixed solution A, stirring for a certain time at a certain temperature, taking out the electromagnetic shielding matrix with the adsorption material loaded on the surface from the mixed solution A, and drying to obtain the electromagnetic shielding material with the adsorption function.
The present invention is also characterized in that,
in the step 1, the thickness of the adsorbing material in the container is 1/5-1/3 of the depth of the carrier solution.
In the step 1, the carrier solution is one or a mixture of butane, pentane and hexane in any ratio, or the carrier solution is one or a mixture of butane, pentane and hexane in any ratio; the materials with adsorption properties were: graphite powder or carbon nano-tubes or a mixture of graphite powder and carbon nano-tubes in any ratio; in step 2, the electromagnetic shielding matrix is: a porous nickel foam matrix or a porous copper foam matrix.
The specification and size of the graphite powder are as follows: the specification of the nano-scale graphite powder and the carbon nano tube is as follows: the pipe diameter is not more than 100 nm.
In step 2, stirring time: 30-120 minutes, and the stirring frequency is as follows: 30-300 r/min, and the environment temperature of the mixed solution A is as follows: 25-35 ℃.
In step 2, the drying temperature is as follows: the drying time is as follows at 30-60 deg.C: 15-60 minutes.
In the step 2, the distance between the upper surface of the electromagnetic shielding base body and the liquid level is 30 cm-50 cm.
The invention has the beneficial effects that: the electromagnetic shielding material with the adsorption function can reduce O3Exhaust passage for plasma air cleaning equipment for exhausting and shielding electromagnetic interference and reducing O simultaneously3The exhaust and electromagnetic interference shielding function can simplify the structure of the purifying equipment.
Drawings
FIG. 1 is a schematic view of the structure of a reaction apparatus used in examples 1 to 5 of the present invention;
fig. 2 is a schematic structural diagram of an electromagnetic shielding material with an adsorption function according to the present invention.
In the figure, 1 is a reaction vessel, 2 is a carrier solution containing an adsorbing material, 3 is an electromagnetic shielding matrix, 4 is a carrying platform, 5 is a stirrer, 6 is a base, and 7 is an adsorbing layer.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention provides an electromagnetic shielding material with an adsorption function, which comprises an electromagnetic shielding base body, wherein an adsorption layer is arranged on the outer surface of the electromagnetic shielding base body, as shown in figure 2.
The thickness of the adsorption layer is 0.5-5 microns.
The electromagnetic shielding matrix is a porous foam nickel matrix or a porous foam copper matrix;
the adsorption layer is a graphite layer or a carbon nanotube layer, wherein the graphite layer is composed of nano-scale graphite powder, the carbon nanotube layer is composed of carbon nanotubes, and the average tube diameter of the carbon nanotube layer is not more than 100 nm; or the adsorption layer is a mixed layer of graphite and carbon nanotubes, the mass ratio of the graphite to the carbon nanotubes in the mixed layer of graphite and carbon nanotubes is any ratio, wherein the graphite in the mixed layer of graphite and carbon nanotubes is nano-scale graphite powder, and the average pipe diameter of the carbon nanotubes in the mixed layer of graphite and carbon nanotubes is not more than 100 nm.
The invention also provides a preparation method of the electromagnetic shielding material with the adsorption function, which is implemented according to the following steps:
and 2, placing the electromagnetic shielding matrix in the mixed solution A, stirring for a certain time at a certain temperature, taking out the electromagnetic shielding matrix with the adsorption material loaded on the surface from the mixed solution A, and drying to obtain the electromagnetic shielding material with the adsorption function.
In the step 1, the thickness of the adsorbing material in the container is 1/5-1/3 of the depth of the carrier solution.
In the step 1, the carrier solution is one or a mixture of butane, pentane and hexane in any ratio, or the carrier solution is one or a mixture of butane, pentane and hexane in any ratio; the materials with adsorption properties were: graphite powder or carbon nano-tubes or a mixture of graphite powder and carbon nano-tubes in any ratio; in step 2, the electromagnetic shielding matrix is: a porous nickel foam matrix or a porous copper foam matrix.
The specification and size of the graphite powder are as follows: the specification of the nano-scale graphite powder and the carbon nano tube is as follows: the pipe diameter is not more than 100 nm.
In step 2, stirring time: 30-120 minutes, and the stirring frequency is as follows: 30-300 r/min, and the environment temperature of the mixed solution A is as follows: 25-35 ℃.
In step 2, the drying temperature is as follows: the drying time is as follows at 30-60 deg.C: 15-60 minutes.
In the step 2, the distance between the upper surface of the electromagnetic shielding base body and the liquid level is 30 cm-50 cm.
Examples 1 to 5 a reaction apparatus as shown in fig. 1 can be used to prepare an electromagnetic shielding material with an adsorption function, the apparatus includes a reaction vessel 1, the reaction vessel 1 is used to hold a carrier solution 2 containing an adsorption material, a base 6 is disposed at the bottom of the reaction vessel 1, a stirrer 5 is mounted on the base 6, a carrying platform 4 is disposed at the top end of a stirring rod of the stirrer 5, the stirring rod is connected with the carrying platform 4 through a bearing, and an electromagnetic shielding substrate 3 is placed on the carrying platform 4.
Coating principle:
because the electromagnetic shielding base material is usually a porous structure, the adsorption material with the diameter far smaller than the pore diameter is endowed on the outer wall of the material in the pore. Pouring the carrier solution into the reaction container 1, introducing common adsorbing materials such as graphite and carbon nanotubes into the carrier solution, controlling the rotating speed of the stirrer 5 to ensure that the adsorbing materials are layered in the carrier solution 2, and the adsorbing materials with large mass (large volume) enter the lower part (such as the dark area in fig. 1) of the carrier solution and the adsorbing materials with small mass (small volume) enter the upper part (such as the light area in fig. 1) of the carrier solution. The carrier solution has smaller surface energy and is easy to enter the pores of the electromagnetic shielding base body 3, so that the adsorbing material with smaller mass can be brought into the pores, and then the volatile liquid can be removed at lower temperature after the electromagnetic shielding base body attached with the adsorbing material is taken out, so that the structure and the performance of the electromagnetic shielding material are not influenced, and the adsorbing material can be left on the electromagnetic shielding material, thereby preparing the multifunctional electromagnetic shielding material with the adsorbing function.
In the coating process, the temperature of the carrier solution is controlled to be 25-35 ℃, so that the movement strength of liquid molecules is increased, the liquid can enter pores of the electromagnetic shielding material, and a large amount of volatile liquid can not be volatilized.
Example 1
A preparation method of an electromagnetic shielding material with an adsorption function is implemented according to the following steps:
in step 1, the thickness of the adsorbent material in the vessel was 1/5 the depth of the carrier solution.
In the step 1, the carrier solution is butane; the materials with adsorption properties were: graphite powder; in step 2, the electromagnetic shielding matrix is: a porous foamed nickel matrix.
The specification and size of the graphite powder are as follows: the average particle size of the graphite powder is 100 nm.
And 2, placing the electromagnetic shielding substrate in the mixed solution A, stirring for a certain time at a certain temperature, taking the electromagnetic shielding substrate with the adsorption material loaded on the surface out of the mixed solution A, and drying to obtain the electromagnetic shielding substrate with the adsorption function, wherein the thickness of the adsorption layer obtained on the electromagnetic shielding substrate is 0.5 micrometer.
In step 2, stirring time: 30 minutes, the stirring frequency was: 30 revolutions per minute, the ambient temperature of the mixed solution a was: at 25 ℃.
In step 2, the drying temperature is as follows: and (3) drying at the temperature of 30 ℃ for the following time: for 15 minutes.
In the step 2, the distance between the upper surface of the electromagnetic shielding base body and the liquid level is 30 cm.
The surface area prepared by the above method is 10cm2The electromagnetic shielding material with adsorption function is placed in a closed container of one cubic meter and containing 110 mu g of O3After being placed in the atmospheric environment for 10 hours, O in the environment is detected3The content of (d) became 77. mu.g.
Example 2
A preparation method of an electromagnetic shielding material with an adsorption function is implemented according to the following steps:
in step 1, the thickness of the adsorbent material in the vessel was 1/3 the depth of the carrier solution.
In the step 1, the carrier solution is pentane; the materials with adsorption properties were: a carbon nanotube; in step 2, the electromagnetic shielding matrix is: a porous copper foam matrix.
The specification of the carbon nanotube is as follows: the average tube diameter is 90 nm.
And 2, placing the electromagnetic shielding substrate in the mixed solution A, stirring for a certain time at a certain temperature, taking out the electromagnetic shielding substrate with the adsorption material loaded on the surface from the mixed solution A, and drying to obtain the electromagnetic shielding material with the adsorption function, wherein the thickness of the adsorption layer obtained on the electromagnetic shielding substrate is 2 microns.
In step 2, stirring time: 120 minutes, the stirring frequency was: 300 revolutions per minute, the ambient temperature of the mixed solution a was: 35 ℃ is carried out.
In step 2, the drying temperature is as follows: the drying time is as follows at 60 ℃: for 60 minutes.
In the step 2, the distance between the upper surface of the electromagnetic shielding base body and the liquid level is 50 cm.
The surface area prepared by the above method is 10cm2The electromagnetic shielding material with adsorption function is placed in a closed container of one cubic meter and containing 110 mu g of O3After being placed in the atmospheric environment for 10 hours, O in the environment is detected3The content of (d) became 80. mu.g.
Example 3
A preparation method of an electromagnetic shielding material with an adsorption function is implemented according to the following steps:
in step 1, the thickness of the adsorbent material in the vessel was 1/4 the depth of the carrier solution.
In step 1, the carrier solution is hexane; the materials with adsorption properties were: the mixture of graphite powder and carbon nano tube in any ratio; in step 2, the electromagnetic shielding matrix is: a porous copper foam matrix.
The specification and size of the graphite powder are as follows: the average grain diameter of the graphite powder is 100nm, and the specification of the carbon nano tube is as follows: the average tube diameter was 80 nm.
And 2, placing the electromagnetic shielding substrate in the mixed solution A, stirring for a certain time at a certain temperature, taking out the electromagnetic shielding substrate with the adsorption material loaded on the surface from the mixed solution A, and drying to obtain the electromagnetic shielding material with the adsorption function, wherein the thickness of the adsorption layer obtained on the electromagnetic shielding substrate is 5 microns.
In step 2, the stirring frequency is as follows: 100 rpm, the ambient temperature of the mixed solution a is: at 30 ℃.
In step 2, the drying temperature is as follows: the drying time at 50 ℃ is as follows: for 40 minutes.
In the step 2, the distance between the upper surface of the electromagnetic shielding base body and the liquid level is 40 cm.
The surface area prepared by the above method is 10cm2The electromagnetic shielding material with adsorption function is placed in a closed container of one cubic meter and containing 110 mu g of O3After being placed in the atmospheric environment for 10 hours, O in the environment is detected3The content of (d) became 70. mu.g.
Example 4
A preparation method of an electromagnetic shielding material with an adsorption function is implemented according to the following steps:
in step 1, the thickness of the adsorbent material in the vessel was 1/5 the depth of the carrier solution.
In step 1, the carrier solution is hexane; the materials with adsorption properties were: graphite powder; in step 2, the electromagnetic shielding matrix is: a porous foamed nickel matrix.
The specification and size of the graphite powder are as follows: the average grain diameter of the graphite powder is 100 nm.
And 2, placing the electromagnetic shielding substrate in the mixed solution A, stirring for a certain time at a certain temperature, taking out the electromagnetic shielding substrate with the adsorption material loaded on the surface from the mixed solution A, and drying to obtain the electromagnetic shielding material with the adsorption function, wherein the thickness of the adsorption layer obtained on the electromagnetic shielding substrate is 1 micron.
In step 2, the stirring frequency is as follows: 200 rpm, the ambient temperature of the mixed solution a is: at 28 ℃.
In step 2, the drying temperature is as follows: the drying time at 50 ℃ is as follows: for 50 minutes.
In the step 2, the distance between the upper surface of the electromagnetic shielding base body and the liquid level is 50 cm.
The surface area prepared by the above method is 10cm2The electromagnetic shielding material with adsorption function is placed in a closed container of one cubic meter and containing 110 mu g of O3After being placed in the atmospheric environment for 10 hours, O in the environment is detected3The content of (d) became 75. mu.g.
Example 5
A preparation method of an electromagnetic shielding material with an adsorption function is implemented according to the following steps:
in step 1, the thickness of the adsorbent material in the vessel was 1/3 the depth of the carrier solution.
In the step 1, the carrier solution is a mixture of butane and pentane in any ratio; the materials with adsorption properties were: graphite powder; in step 2, the electromagnetic shielding matrix is: a porous copper foam matrix.
The specification and size of the graphite powder are as follows: the average grain diameter of the graphite powder is 100 nm.
And 2, placing the electromagnetic shielding substrate in the mixed solution A, stirring for a certain time at a certain temperature, taking out the electromagnetic shielding substrate with the adsorption material loaded on the surface from the mixed solution A, and drying to obtain the electromagnetic shielding material with the adsorption function, wherein the thickness of the adsorption layer obtained on the electromagnetic shielding substrate is 3 microns.
In step 2, the stirring frequency is as follows: 30 revolutions per minute, the ambient temperature of the mixed solution a was: at 25 ℃.
In step 2, the drying temperature is as follows: and (3) drying at the temperature of 30 ℃ for the following time: for 60 minutes.
In the step 2, the distance between the upper surface of the electromagnetic shielding base body and the liquid level is 40 cm.
The surface area prepared by the above method is 10cm2The electromagnetic shielding material with adsorption function is placed in a closed container of one cubic meter and containing 110 mu g of O3After being placed in the atmospheric environment for 10 hours, O in the environment is detected3The content of (d) became 79. mu.g.
Claims (10)
1. The electromagnetic shielding material with the adsorption function is characterized by comprising an electromagnetic shielding base body, wherein an adsorption layer is arranged on the outer surface of the electromagnetic shielding base body.
2. The electromagnetic shielding material with adsorption function of claim 1, wherein the thickness of said adsorption layer is 0.5-5 μm.
3. The electromagnetic shielding material with adsorption function of claim 1, wherein the electromagnetic shielding substrate is a porous nickel foam substrate or a porous copper foam substrate;
the adsorption layer is a graphite layer or a carbon nanotube layer, wherein the graphite layer is composed of nano-scale graphite powder, the carbon nanotube layer is composed of carbon nanotubes, and the average tube diameter of the carbon nanotube layer is not more than 100 nm; or the adsorption layer is a mixed layer of graphite and carbon nanotubes, the mass ratio of the graphite to the carbon nanotubes in the mixed layer of graphite and carbon nanotubes is any ratio, wherein the graphite in the mixed layer of graphite and carbon nanotubes is nano-scale graphite powder, and the average pipe diameter of the carbon nanotubes in the mixed layer of graphite and carbon nanotubes is not more than 100 nm.
4. A method for preparing an electromagnetic shielding material with an adsorption function according to any one of claims 1 to 3, characterized by comprising the following steps:
step 1, firstly adding a carrier solution into a container, and then adding an adsorption material into the carrier solution to obtain a mixed solution A;
and 2, placing the electromagnetic shielding matrix in the mixed solution A, stirring for a certain time at a certain temperature, taking out the electromagnetic shielding matrix with the adsorption material loaded on the surface from the mixed solution A, and drying to obtain the electromagnetic shielding material with the adsorption function.
5. The method for preparing an electromagnetic shielding material with adsorption function as claimed in claim 4, wherein in step 1, the thickness of the adsorption material in the container is 1/5-1/3 of the depth of the carrier solution.
6. The method for preparing an electromagnetic shielding material with adsorption function according to claim 4, wherein in step 1, the carrier solution is one or a mixture of butane, pentane and hexane in any ratio, or the carrier solution is one or a mixture of butane, pentane and hexane in any ratio; the materials with adsorption properties were: graphite powder or carbon nano-tubes or a mixture of graphite powder and carbon nano-tubes in any ratio; in step 2, the electromagnetic shielding matrix is: a porous nickel foam matrix or a porous copper foam matrix.
7. The method for preparing an electromagnetic shielding material with adsorption function according to claim 6, wherein the graphite powder has the specification and size: the specification of the nano-scale graphite powder and the carbon nano tube is as follows: the pipe diameter is not more than 100 nm.
8. The method for preparing an electromagnetic shielding material with adsorption function according to claim 6, wherein in step 2, the stirring time is as follows: 30-120 minutes, and the stirring frequency is as follows: 30-300 r/min, and the environment temperature of the mixed solution A is as follows: 25-35 ℃.
9. The method for preparing an electromagnetic shielding material with adsorption function according to claim 6, wherein in step 2, the drying temperature is: the drying time is as follows at 30-60 deg.C: 15-60 minutes.
10. The method for preparing an electromagnetic shielding material with adsorption function according to claim 4, wherein in step 2, the distance between the upper surface of the electromagnetic shielding substrate and the liquid level is 30cm to 50 cm.
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