CN115746531A - PC-ABS electromagnetic shielding composite material and preparation method and application thereof - Google Patents
PC-ABS electromagnetic shielding composite material and preparation method and application thereof Download PDFInfo
- Publication number
- CN115746531A CN115746531A CN202211473794.4A CN202211473794A CN115746531A CN 115746531 A CN115746531 A CN 115746531A CN 202211473794 A CN202211473794 A CN 202211473794A CN 115746531 A CN115746531 A CN 115746531A
- Authority
- CN
- China
- Prior art keywords
- composite material
- electromagnetic shielding
- shielding composite
- carbon nano
- nano tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 80
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 29
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 15
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 47
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 47
- 229910021389 graphene Inorganic materials 0.000 claims description 29
- 239000004417 polycarbonate Substances 0.000 claims description 23
- 229920000515 polycarbonate Polymers 0.000 claims description 23
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims description 19
- 239000012752 auxiliary agent Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 239000003963 antioxidant agent Substances 0.000 claims description 4
- 230000003078 antioxidant effect Effects 0.000 claims description 4
- 239000012745 toughening agent Substances 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 15
- 229920007019 PC/ABS Polymers 0.000 abstract description 12
- 230000010287 polarization Effects 0.000 abstract description 12
- 238000012986 modification Methods 0.000 abstract description 10
- 230000004048 modification Effects 0.000 abstract description 10
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- 239000011231 conductive filler Substances 0.000 abstract description 5
- 239000012212 insulator Substances 0.000 abstract description 5
- 239000011258 core-shell material Substances 0.000 abstract description 4
- 239000002861 polymer material Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 9
- 230000001965 increasing effect Effects 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 229920005668 polycarbonate resin Polymers 0.000 description 5
- 239000004431 polycarbonate resin Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 description 1
- 229920001112 grafted polyolefin Polymers 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Images
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention particularly relates to a PC-ABS electromagnetic shielding composite material and a preparation method and application thereof, belonging to the technical field of high polymer materials, wherein the composite material comprises the following raw materials: the modified carbon nano tube is a maleic anhydride grafted carbon nano tube; the surface modification of the carbon nano tube can improve the absorption loss and the multiple reflection attenuation, the hollow structure of the carbon nano tube can increase the dissipation path of electromagnetic waves and enhance the interface polarization effect, and the prepared PC/ABS electromagnetic shielding composite material not only has excellent dielectric property, but also has good processability by blending the conductor-insulator core-shell type nano conductive filler taking the carbon nano tube as a core and maleic anhydride as a shell and the PC/ABS base material.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a PC-ABS electromagnetic shielding composite material, and a preparation method and application thereof.
Background
With the development of scientific technology and electronic industry, various electronic products for civil and military use are more and more widely applied. Most of the electronic devices are composed of large-scale or ultra-large-scale circuits, and are easily subjected to external or mutual electromagnetic interference to cause acoustic image obstruction and even misoperation, and the electromagnetic interference becomes a new social public hazard. Plastics are increasingly used in electronic device housings due to their light weight, corrosion resistance, good plasticity, low cost, and the like. However, as common plastics are used as insulators, on one hand, static electricity is easy to accumulate, and fire and even explosion are easy to cause in flammable and explosive places; on the other hand, the electromagnetic wave shielding film is almost transparent to electromagnetic waves, cannot absorb or reflect the electromagnetic waves and does not have the electromagnetic shielding function.
The filling type composite electromagnetic shielding material is prepared by taking high molecular resin as a matrix, adding a certain amount of conductive filler into the matrix through melt blending, solution blending, in-situ polymerization, coprecipitation method and the like, so that the filling type composite electromagnetic shielding material has the advantages of easiness in forming, good corrosion resistance, good mechanical property, suitability for mass production and the like. The method makes up the defects of a metal shielding body and a surface coating type composite shielding material, has better application prospect, and still has some defects. For example, the shielding mechanism of electromagnetic waves is biased toward reflection loss rather than absorption loss, and thus, the application of the shielding mechanism in various fields is difficult to satisfy.
Disclosure of Invention
The application aims to provide a PC-ABS electromagnetic shielding composite material, and a preparation method and application thereof, so as to solve the problem of poor electromagnetic shielding performance at present.
The embodiment of the invention provides a PC-ABS electromagnetic shielding composite material, which comprises the following raw materials: polycarbonate, acrylonitrile-butadiene-styrene, a modified carbon nano tube and an auxiliary agent, wherein the modified carbon nano tube is a maleic anhydride grafted carbon nano tube.
Optionally, the raw materials of the composite material further include: and (3) oxidizing the graphene.
Optionally, the raw materials of the composite material include, by mass:
20-40% of polycarbonate, 10-30% of acrylonitrile-butadiene-styrene, 1-10% of modified carbon nanotube, 1-5% of graphene oxide and 0.1-1% of auxiliary agent.
Optionally, the raw materials of the composite material include, by mass:
25-35% of polycarbonate, 15-25% of acrylonitrile-butadiene-styrene, 3-8% of modified carbon nanotube, 2-4% of graphene oxide and 0.3-0.7% of auxiliary agent.
Optionally, the auxiliary agent comprises: a toughening agent and an antioxidant.
Based on the same inventive concept, the embodiment of the invention also provides a preparation method of the PC-ABS electromagnetic shielding composite material, which comprises the following steps:
premixing polycarbonate and acrylonitrile-butadiene-styrene to obtain an initial mixture;
mixing the rest raw materials and the initial mixture for the second time to obtain a secondary mixed material;
and heating, melting, extruding and granulating the secondary mixed material to obtain the PC-ABS electromagnetic shielding composite material.
Optionally, the temperature of the heating and melting is 220-250 ℃.
Optionally, the method further comprises drying the polycarbonate and acrylonitrile butadiene styrene.
Optionally, the drying temperature is 80-100 ℃, and the drying time is 2-4h.
Based on the same inventive concept, the embodiment of the invention also provides an electronic equipment shell, and the shell is made of the PC-ABS electromagnetic shielding composite material.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
according to the PC-ABS electromagnetic shielding composite material provided by the embodiment of the invention, the absorption loss and the multiple reflection attenuation can be improved by carrying out surface modification on the carbon nano tube, the hollow structure of the carbon nano tube can increase the dissipation path of electromagnetic waves and enhance the interface polarization effect, and the prepared PC/ABS electromagnetic shielding composite material not only has excellent dielectric property, but also has good processability by blending the conductor-insulator core-shell type nano conductive filler taking the carbon nano tube as a core and maleic anhydride as a shell and the PC/ABS base material.
The above description is only an overview of the technical solutions of the present invention, and the present invention can be implemented in accordance with the content of the description so as to make the technical means of the present invention more clearly understood, and the above and other objects, features, and advantages of the present invention will be more clearly understood.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a process flow diagram provided by an embodiment of the present invention;
fig. 2 is a flow chart of a method provided by an embodiment of the invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically indicated, various raw materials, reagents, instruments, equipment and the like used in the present invention may be commercially available or may be prepared by existing methods.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
according to an exemplary embodiment of the present invention, there is provided a PC-ABS electromagnetic shielding composite material, the composite material comprising raw materials of: polycarbonate, acrylonitrile-butadiene-styrene, a modified carbon nano tube and an auxiliary agent, wherein the modified carbon nano tube is a maleic anhydride grafted carbon nano tube.
By adopting the design, the absorption loss and the multiple reflection attenuation can be improved by carrying out surface modification on the carbon nano tube, the hollow structure of the carbon nano tube can increase the dissipation path of electromagnetic waves and enhance the interface polarization effect, and the prepared PC/ABS electromagnetic shielding composite material not only has excellent dielectric property, but also has good processability by blending the conductor-insulator core-shell type nano conductive filler taking the carbon nano tube as a core and maleic anhydride as a shell and the PC/ABS base material.
In some embodiments, the feedstock for the composite material further comprises: and (3) oxidizing the graphene.
By adopting the design, the polarization loss of electromagnetic waves can be increased by functional groups and defects contained on the surface of the graphene oxide; the introduction of graphene and the covalent C-C bond combination can improve the dispersibility of the carbon nano tube and reduce the surface contact resistance; the graphene/carbon nano tube multilayer structure is beneficial to enhancing the polarization effect of the composite material, increasing the dielectric loss way and effectively improving the electromagnetic wave loss capability.
In some embodiments, the raw materials of the composite material comprise, in mass fraction:
20-40% of Polycarbonate (PC), 10-30% of acrylonitrile-butadiene-styrene (ABS), 1-10% of modified carbon nano tube, 1-5% of graphene oxide and 0.1-1% of auxiliary agent.
The polycarbonate is used for providing mechanical properties of a base material, the mass fraction of the polycarbonate is controlled to be 20-40%, and the polycarbonate is the base material of an alloy material, so that sufficient alloy material can be formed with acrylonitrile-butadiene-styrene in the mass fraction range, if the polycarbonate resin is too much, the acrylonitrile-butadiene-styrene resin is too little, and sufficient alloy material cannot be formed, and if the polycarbonate resin is too little, the acrylonitrile-butadiene-styrene resin is too much, and sufficient alloy material cannot be formed;
the acrylonitrile-butadiene-styrene is used for providing the processability of the substrate, controlling the mass fraction of the acrylonitrile-butadiene-styrene to be 10-30%, and in the mass fraction range, enough alloy material can be formed with the polycarbonate, if the acrylonitrile-butadiene-styrene resin is too much, the polycarbonate resin is too little, and the alloy material cannot be formed sufficiently, and if the polycarbonate resin is too little, the polycarbonate resin is too much, and the alloy material cannot be formed sufficiently;
the modified carbon nano tube can increase the dissipation path of electromagnetic waves, enhance the interface polarization effect, control the mass fraction of the modified carbon nano tube to be 1-10%, and exert the function of the modified carbon nano tube within the mass fraction range, if the modified carbon nano tube contains too many components, the mechanical property of the alloy material is influenced, and if the modified carbon nano tube contains too few components, the electromagnetic wave loss capability of the material cannot be exerted;
the graphene oxide has the effects of enhancing the polarization effect of the composite material, increasing the dielectric loss way, controlling the mass fraction of the graphene oxide to be 1% -5%, and in the range of the mass fraction, the graphene oxide can play a role, the mass fraction is too large to form an optimal graphene/carbon nanotube multilayer structure with the modified carbon nanotube, the polarization effect of the composite material is played, and if the mass fraction is too small, the graphene oxide cannot form the optimal graphene/carbon nanotube multilayer structure with the modified carbon nanotube, and the polarization effect of the composite material is played;
the auxiliary agent has the effects of improving the compatibility between the alloy material and the graphene/carbon nano tube, controlling the mass fraction of the auxiliary agent to be 0.1-1%, and playing the role of the auxiliary agent within the mass fraction range;
in some embodiments, the raw materials of the composite material comprise, in mass fraction:
25% -35% of polycarbonate, 15% -25% of acrylonitrile-butadiene-styrene, 3% -8% of modified carbon nano tube, 2% -4% of graphene oxide and 0.3% -0.7% of auxiliary agent.
In some embodiments, the adjuvant comprises: toughening agent and antioxidant, wherein the toughening agent can be selected from glycidyl methacrylate grafted polyolefin elastomer (POE-g-GMA), and the antioxidant can be selected from antioxidant 1010.
According to another exemplary embodiment of the present invention, there is provided a method for preparing the PC-ABS electromagnetic shielding composite material as described above, the method including:
s0, according to a material formula, the material comprises the following components in percentage by mass: 20% -40% of Polycarbonate (PC); 10 to 30 percent of acrylonitrile-butadiene-styrene (ABS); 1% -10% of maleic anhydride grafted carbon nano-tubes; 1% -10% of graphene oxide; 0.1 to 1 percent of auxiliary agent, and accurately weighing each component;
s1, premixing polycarbonate and acrylonitrile-butadiene-styrene to obtain an initial mixture;
specifically, in the embodiment, the dried PC resin and the dried ABS resin are sequentially poured into a stirring barrel, and the materials are premixed for 3-5 min, and then mixed uniformly to obtain an initial mixture;
s2, mixing the residual raw materials and the initial mixture for the second time to obtain a secondary mixed material;
specifically, in the embodiment, the initial mixture, the maleic anhydride grafted carbon nanotube, the graphene oxide and the auxiliary agent which are weighed according to the formula are poured into the stirring barrel again to be mixed for the second time, the mixing time is 3-5 min, and the secondary mixed material is prepared after uniform mixing;
and S3, heating, melting, extruding and granulating the secondary mixed material to obtain the PC-ABS electromagnetic shielding composite material.
Specifically, in this example, the secondary mixture was put into the main hopper of a twin-screw extruder, and was heated, melted, extruded and pelletized to obtain a PC/ABS composite material.
In some embodiments, the temperature of the heat-melting is 220-250 ℃.
According to another exemplary embodiment of the present invention, there is provided an electronic device housing made of the PC-ABS electromagnetic shielding composite material as described above.
The PC-ABS electromagnetic shielding composite material of the present application, the preparation method and the application thereof will be described in detail with reference to examples, comparative examples and experimental data.
Examples 1 to 3 and comparative examples 1 to 2
A preparation method of a PC-ABS electromagnetic shielding composite material comprises the following steps:
(1) According to the material formula, the material comprises the following components in percentage by mass: 20% -40% of Polycarbonate (PC); 10 to 30 percent of acrylonitrile-butadiene-styrene (ABS); 1% -10% of maleic anhydride grafted carbon nano-tube; 1% -10% of graphene oxide; 0.1 to 1 percent of auxiliary agent, and accurately weighing each component;
the formulations of the examples and comparative examples are shown in the following table:
| example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | |
| PC resin | 57.50％ | 55.00％ | 50.00％ | 50.00％ | 50.00％ |
| ABS resin | 30.00％ | 32.50％ | 37.50％ | 37.50％ | 37.50％ |
| Maleic anhydride grafted carbon nanotubes | 10.00％ | 8.00％ | 6.00％ | 12.00％ | / |
| Graphene oxide | 2.00％ | 4.00％ | 6.00％ | / | 12.00％ |
| Auxiliary agent | 0.50％ | 0.50％ | 0.50％ | 0.50％ | 0.50％ |
(2) Sequentially pouring the dried PC resin and ABS resin into a stirring barrel, premixing the materials for 3-5 min, and uniformly mixing to obtain an initial mixture;
(3) Pouring the initial mixture, the maleic anhydride grafted carbon nanotube, the graphene oxide and the auxiliary agent which are weighed according to the formula into the stirring barrel again for mixing for the second time, wherein the mixing time is 3-5 min, and mixing uniformly to obtain a secondary mixed material;
(4) And (3) putting the secondary mixed material into a main feeding hopper of a double-screw extruder, heating and melting, extruding and granulating to finally obtain the PC/ABS composite material.
Examples of the experiments
The PC-ABS electromagnetic shielding composite materials prepared in examples 1-3 and comparative examples 1-2 were subjected to performance tests, and the test results are shown in the following table.
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | |
| Shielding effectiveness SE/dB | 72 | 75 | 77 | 61 | 59 |
As can be seen from the performance comparison tests in the above table, compared with comparative examples 1 to 2, the PC/ABS electromagnetic shielding composite material prepared in examples 1 to 3 of the present invention can improve absorption loss and multiple reflection attenuation by performing surface modification on the carbon nanotube, and the polarization loss of the electromagnetic wave can be increased by the functional group and defect contained in the surface of the graphene oxide. By optimizing the dosage, the form, the modification, the dispersion and the like of the carbon-based composite conductive nano filler, a conductive path is increased, the conductivity is obviously increased, the synergistic effect is exerted, and the electromagnetic wave loss capability of the PC/ABS electromagnetic shielding composite material is effectively improved.
One or more technical solutions in the embodiments of the present invention at least have the following technical effects or advantages:
the composite material provided by the embodiment of the invention comprises the following raw materials: the modified carbon nano tube is a maleic anhydride grafted carbon nano tube, the hollow structure of the carbon nano tube can increase the dissipation path of electromagnetic waves and enhance the interface polarization effect, and the dispersibility of the carbon nano tube can be improved and the surface contact resistance can be reduced by introducing the graphene and combining the graphene by covalent C-C bonds. The graphene/carbon nanotube multilayer structure is beneficial to enhancing the polarization effect of the composite material, increasing the dielectric loss way and effectively improving the electromagnetic wave loss capability. The PC/ABS electromagnetic shielding composite material prepared by mixing the conductor-insulator core-shell type nanometer conductive filler taking the carbon nanotube as the core and the maleic anhydride as the shell with the compounded graphene oxide nanometer filler with the modified surface and the PC/ABS base material has excellent dielectric property and good processability.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The PC-ABS electromagnetic shielding composite material is characterized by comprising the following raw materials: polycarbonate, acrylonitrile-butadiene-styrene, a modified carbon nano tube and an auxiliary agent, wherein the modified carbon nano tube is a maleic anhydride grafted carbon nano tube.
2. The PC-ABS electromagnetic shielding composite material of claim 1, wherein the raw materials of the composite material further comprise: and (3) oxidizing the graphene.
3. The PC-ABS electromagnetic shielding composite material of claim 2, wherein the raw materials of the composite material comprise, in mass fraction:
20-40% of polycarbonate, 10-30% of acrylonitrile-butadiene-styrene, 1-10% of modified carbon nanotube, 1-5% of graphene oxide and 0.1-1% of auxiliary agent.
4. The PC-ABS electromagnetic shielding composite material according to claim 2 or 3, wherein the raw materials of the composite material comprise, in mass fraction:
25-35% of polycarbonate, 15-25% of acrylonitrile-butadiene-styrene, 3-8% of modified carbon nanotube, 2-4% of graphene oxide and 0.3-0.7% of auxiliary agent.
5. The PC-ABS electromagnetic shielding composite of claim 1, wherein the auxiliary agent comprises: a toughening agent and an antioxidant.
6. A method for preparing a PC-ABS electromagnetic shielding composite material as claimed in any one of claims 1 to 5, wherein the method comprises:
premixing polycarbonate and acrylonitrile-butadiene-styrene to obtain an initial mixture;
mixing the rest raw materials and the initial mixture for the second time to obtain a secondary mixed material;
and heating, melting, extruding and granulating the secondary mixed material to obtain the PC-ABS electromagnetic shielding composite material.
7. The method for preparing a PC-ABS electromagnetic shielding composite material according to claim 6, wherein the temperature for heating and melting is 220-250 ℃.
8. The method for preparing a PC-ABS electro-magnetic shielding composite of claim 6, further comprising drying the polycarbonate and the acrylonitrile-butadiene-styrene.
9. The method for preparing PBT/PET alloy material of GWIT according to claim 8, wherein the drying temperature is 80-100 ℃, and the drying time is 2-4h.
10. An electronic device housing, characterized in that the housing is made of the PC-ABS electromagnetic shielding composite material as claimed in any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211473794.4A CN115746531B (en) | 2022-11-22 | 2022-11-22 | PC-ABS electromagnetic shielding composite material and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211473794.4A CN115746531B (en) | 2022-11-22 | 2022-11-22 | PC-ABS electromagnetic shielding composite material and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115746531A true CN115746531A (en) | 2023-03-07 |
| CN115746531B CN115746531B (en) | 2024-07-05 |
Family
ID=85335861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211473794.4A Active CN115746531B (en) | 2022-11-22 | 2022-11-22 | PC-ABS electromagnetic shielding composite material and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115746531B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116396659A (en) * | 2023-03-22 | 2023-07-07 | 西北工业大学 | Modified carbon nano tube-epoxy resin wave-absorbing coating and preparation process |
| CN118374137A (en) * | 2024-05-16 | 2024-07-23 | 广东信隆新材料股份有限公司 | Novel PC/ABS alloy and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109135270A (en) * | 2018-08-09 | 2019-01-04 | 厦门巧亿科技有限公司 | A kind of conduction of modified graphene, anti-static plastic and preparation method thereof |
| US20200102453A1 (en) * | 2018-10-02 | 2020-04-02 | Lockheed Martin Corporation | Conductive thermoplastic polycarbonate/acrylonitrile butadiene styrene (pc/abs) polymer with nanomaterials and articles and methods thereof |
-
2022
- 2022-11-22 CN CN202211473794.4A patent/CN115746531B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109135270A (en) * | 2018-08-09 | 2019-01-04 | 厦门巧亿科技有限公司 | A kind of conduction of modified graphene, anti-static plastic and preparation method thereof |
| US20200102453A1 (en) * | 2018-10-02 | 2020-04-02 | Lockheed Martin Corporation | Conductive thermoplastic polycarbonate/acrylonitrile butadiene styrene (pc/abs) polymer with nanomaterials and articles and methods thereof |
Non-Patent Citations (3)
| Title |
|---|
| 王丽君等: "碳系填料填充型电磁屏蔽材料的研究进展", 《西华大学学报（自然科学版）》, vol. 39, no. 3, pages 90 - 96 * |
| 罗成等: "碳纳米管填充聚合物基复合体系的电磁屏蔽性能", 《塑料》, vol. 39, no. 6, pages 37 - 40 * |
| 陈建军等: "功能化碳纳米管/环氧树脂多孔复合材料制备及电磁屏蔽性能", 《化工进展》, vol. 37, no. 2, pages 664 - 672 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116396659A (en) * | 2023-03-22 | 2023-07-07 | 西北工业大学 | Modified carbon nano tube-epoxy resin wave-absorbing coating and preparation process |
| CN116396659B (en) * | 2023-03-22 | 2024-02-13 | 西北工业大学 | Modified carbon nano tube-epoxy resin wave-absorbing coating and preparation process |
| CN118374137A (en) * | 2024-05-16 | 2024-07-23 | 广东信隆新材料股份有限公司 | Novel PC/ABS alloy and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115746531B (en) | 2024-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115746531B (en) | PC-ABS electromagnetic shielding composite material and preparation method and application thereof | |
| Gahlout et al. | EMI shielding response of polypyrrole-MWCNT/polyurethane composites | |
| CN100405886C (en) | Polyethylene composite film for shielding wideband electromagnetic wave and its preparing method | |
| KR100808146B1 (en) | Compositions of thin conductive tape for EMI shielding, method thereof and products manufactured therefrom | |
| JP6319287B2 (en) | Resin composition for high dielectric constant material, molded product containing the same, and coloring masterbatch | |
| TW201024352A (en) | Resin composition | |
| US9359483B2 (en) | Hybrid carbon black, coating composition and shielding material employing the same | |
| KR101299576B1 (en) | High intensity polymeric compound and method for manufacturing the same | |
| JP2011208123A (en) | Electrically conductive resin composition and molded product of the same | |
| CN111393826A (en) | Graphene-enhanced conductive PC/ABS alloy and preparation method thereof | |
| CN114133706B (en) | PBT composite material and preparation method and application thereof | |
| CN103408905B (en) | A kind of PBT composite and preparation method thereof | |
| Ma et al. | Polystyrene nanocomposite materials: preparation, morphology, and mechanical, electrical, and thermal properties | |
| Yi et al. | Antioxidating and reinforcing effect of polydopamine functionalized silica on natural rubber latex films | |
| Razak et al. | Polyaniline-coated kenaf core and its effect on the mechanical and electrical properties of epoxy resin | |
| KR20100103172A (en) | Polymer/carbon nano tube composite with good electronic property and fabrication method for thereof | |
| KR100700742B1 (en) | A composition of polycarbonate/styrenic copolymers with improved compatibility prepared by mixing carbon nanotube | |
| JP7446127B2 (en) | Resin composition and molded product made from the resin composition | |
| CN111393744A (en) | TPE material with antibacterial conductivity and preparation method thereof | |
| Cruz et al. | Effect of aspect ratio and bulk density of carbon nanotube on the electrical conductivity of polycarbonate/multi‐walled carbon nanotube nanocomposites | |
| Tambe et al. | Polymeric blends as EMI shielding materials | |
| JPH10204305A (en) | Electromagnetic-wave-shielding resin composition and molding made therefrom | |
| US20070043171A1 (en) | Polymer composition comprising a rubber modified styrenic polymer resin and an ethylenic rubber polymer | |
| JP2009196853A (en) | Carbon nanotube-dispersed solution | |
| Duan et al. | Effect of a coupling agent on the electromagnetic and mechanical properties of carbon black/acrylonitrile–butadiene–styrene composites |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |