CN117820743A - Electromagnetic shielding polyethylene material and preparation method thereof - Google Patents
Electromagnetic shielding polyethylene material and preparation method thereof Download PDFInfo
- Publication number
- CN117820743A CN117820743A CN202211180392.5A CN202211180392A CN117820743A CN 117820743 A CN117820743 A CN 117820743A CN 202211180392 A CN202211180392 A CN 202211180392A CN 117820743 A CN117820743 A CN 117820743A
- Authority
- CN
- China
- Prior art keywords
- polyethylene
- electromagnetic shielding
- parts
- carbon black
- conductive carbon
- 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.)
- Pending
Links
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 54
- -1 polyethylene Polymers 0.000 title claims abstract description 54
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 54
- 239000000463 material Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title abstract description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000002070 nanowire Substances 0.000 claims abstract description 17
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 15
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 15
- 239000002270 dispersing agent Substances 0.000 claims abstract description 14
- 239000000314 lubricant Substances 0.000 claims abstract description 14
- 238000004381 surface treatment Methods 0.000 claims abstract description 13
- 229920001912 maleic anhydride grafted polyethylene Polymers 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 16
- 238000001125 extrusion Methods 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical group [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 4
- 239000008116 calcium stearate Substances 0.000 claims description 4
- 235000013539 calcium stearate Nutrition 0.000 claims description 4
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims description 4
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 3
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229920001903 high density polyethylene Polymers 0.000 claims description 3
- 239000004700 high-density polyethylene Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- OVYTZAASVAZITK-UHFFFAOYSA-M sodium;ethanol;hydroxide Chemical compound [OH-].[Na+].CCO OVYTZAASVAZITK-UHFFFAOYSA-M 0.000 claims description 3
- 239000001384 succinic acid Substances 0.000 claims description 3
- 229920002907 Guar gum Polymers 0.000 claims description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 229960002154 guar gum Drugs 0.000 claims description 2
- 235000010417 guar gum Nutrition 0.000 claims description 2
- 239000000665 guar gum Substances 0.000 claims description 2
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 2
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 2
- 229920001684 low density polyethylene Polymers 0.000 claims description 2
- 239000004702 low-density polyethylene Substances 0.000 claims description 2
- JKBYAWVSVVSRIX-UHFFFAOYSA-N octadecyl 2-(1-octadecoxy-1-oxopropan-2-yl)sulfanylpropanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(C)SC(C)C(=O)OCCCCCCCCCCCCCCCCCC JKBYAWVSVVSRIX-UHFFFAOYSA-N 0.000 claims description 2
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 2
- RMGVATURDVPNOZ-UHFFFAOYSA-M potassium;hexadecyl hydrogen phosphate Chemical compound [K+].CCCCCCCCCCCCCCCCOP(O)([O-])=O RMGVATURDVPNOZ-UHFFFAOYSA-M 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 238000011056 performance test Methods 0.000 description 8
- 239000002131 composite material Substances 0.000 description 6
- 239000008187 granular material Substances 0.000 description 6
- 239000006229 carbon black Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920002959 polymer blend Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N 1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylic acid Chemical compound C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 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
- 239000011358 absorbing material Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- CNXJITYCNQNTBD-UHFFFAOYSA-L dipotassium;hexadecyl phosphate Chemical compound [K+].[K+].CCCCCCCCCCCCCCCCOP([O-])([O-])=O CNXJITYCNQNTBD-UHFFFAOYSA-L 0.000 description 1
- PWWSSIYVTQUJQQ-UHFFFAOYSA-N distearyl thiodipropionate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCCCCCC PWWSSIYVTQUJQQ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses an electromagnetic shielding polyethylene material and a preparation method thereof, wherein the electromagnetic shielding polyethylene material is prepared from 50-70 parts of polyethylene, 20-30 parts of surface treatment conductive carbon black, 5-15 parts of metal nanowires, 5 parts of maleic anhydride grafted polyethylene, 0.5 part of dispersing agent, 0.3 part of lubricant and 0.5 part of antioxidant according to parts by weight. By introducing surface treatment conductive carbon black and metal nanowires into a polyethylene system, a strong conductive path is formed, so that the polyethylene material has excellent mechanical properties and good electromagnetic shielding performance.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to an electromagnetic shielding polyethylene material and a preparation method thereof.
Background
Polyethylene (PE) which is a thermoplastic resin formed by polymerization of monomer ethylene. Polyethylene has excellent low temperature resistance and good chemical stability, and can resist most of acid and alkali corrosion; is insoluble in common solvents at normal temperature, has small water absorption and excellent electrical insulation.
Electromagnetic interference can be effectively reduced by adding the electromagnetic shielding material into the polyethylene, and the electromagnetic shielding performance of the polyethylene material is obviously improved. Common electromagnetic shielding materials include conductive rubber, conductive cloth, conductive foam, conductive paint or wave absorbing materials, and the like. The conductivity, the magnetic permeability and the material thickness of the electromagnetic shielding material are three basic factors of shielding effectiveness, and the electromagnetic shielding material is gradually developed to the directions of higher shielding effectiveness, wider shielding frequency and better comprehensive performance.
Carbon black, which is one of the most widely used conductive materials and is also an excellent electromagnetic shielding material, is filled into a polymer material, and reduces the volume resistivity thereof, and the degree of reduction depends on the properties of carbon black particles and the filling amount thereof. When the other properties of the carbon black are the same, the finer the primary particles, the smaller the primary aggregates, and the lower the volume resistivity of the polymer mixture. The volume resistivity of the polymer mixture will decrease as the structure of the conductive carbon black increases. The basic properties of the highly conductive carbon black must be small particle size, large specific surface area, highly developed structure, less impurity to capture pi electrons, high graphitization degree and porosity.
However, the prior art modification requires higher carbon black loadings to build more efficient pathways and is therefore more costly and has a greater negative impact on material properties such as flowability and stiffness.
Disclosure of Invention
In view of the foregoing, it is necessary to provide an electromagnetic shielding polyethylene material, in which surface-treated conductive carbon black is dispersed in a polyethylene system, and a proper amount of metal nanowires are added to form a strong conductive path, so that the polyethylene material has excellent mechanical properties and good electromagnetic shielding properties.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides an electromagnetic shielding polyethylene material which is prepared from 50-70 parts of polyethylene, 20-30 parts of surface treatment conductive carbon black, 5-15 parts of metal nanowires, 5 parts of maleic anhydride grafted polyethylene, 0.5 part of dispersing agent, 0.3 part of lubricant and 0.5 part of antioxidant according to parts by weight.
Further, the polyethylene is one or more selected from high density polyethylene, low density polyethylene and linear low density polyethylene.
Further, the surface treatment conductive carbon black is obtained by carrying out surface treatment on the conductive carbon black by adopting the following treatment method:
dissolving 1 part of EVA resin and 2 parts of succinic acid in ethanol, adding 1 part of catalyst triethylamine into the mixture, heating to 90-100 ℃, refluxing and stirring for 2-3 hours, and cooling to 60 ℃; adding 15% sodium hydroxide-ethanol solution into the cooled system, and stirring for reacting for 1h to obtain a modified solution;
adding 0.1 part of dried conductive carbon black into the modified solution, stirring for 30-40min at 50-60 ℃, filtering and drying to obtain the surface treatment conductive carbon black.
Further, the metal nanowire is a copper nanowire.
Further, the length of the copper nanowire is 10-30 mu m, and the purity of the used raw material copper is more than 99%.
Further, the dispersing agent is selected from the group consisting of sodium dodecyl sulfate, potassium cetyl phosphate and a mixture of two or more of guar gum.
Further, the lubricant is calcium stearate and ethylene bis-stearamide, and the mass ratio of the calcium stearate to the ethylene bis-stearamide is 1: 1.
Further, the antioxidant is a mixture of at least three of pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], n-stearyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, tri (2, 4-di-tert-butylphenyl) phosphite and dioctadecyl thiodipropionate.
The invention further provides a preparation method of the electromagnetic shielding polyethylene material, which comprises the following steps:
fully mixing polyethylene, surface-treated conductive carbon black, copper nanowires, maleic anhydride grafted polyethylene, a dispersing agent, a lubricant and an antioxidant according to the weight part ratio to obtain uniform premix;
and adding the premix into a double-screw extruder, mixing, extruding, cooling and granulating to obtain the electromagnetic shielding polyethylene material.
Further, in the twin-screw extruder, the extrusion temperature of each extrusion zone is 155-165 ℃, 160-170 ℃, 170-180 ℃, 180-190 ℃ in sequence.
The invention has the following beneficial effects:
according to the invention, the surface treatment conductive carbon black and the metal nanowire are added into the polyethylene system to form a stronger conductive path, so that the polyethylene material has good electromagnetic shielding performance and excellent mechanical property.
Specifically, the surface treatment method of the conductive carbon black can effectively improve the surface wettability of the carbon black through the grafting reaction of the polymer on the surface of the conductive carbon black, and meanwhile, the surface of the nanowire is also provided with the adhesion of the oligomer, so that the binding force between the fiber and the resin is increased, and the conductivity and the mechanical property of the material are greatly improved.
The resin provided by the invention has wide processing window and strong processing adaptability; meanwhile, the adjustable formula composition or the invention has higher adaptability, and can meet different material properties and molding requirements.
Detailed Description
The present invention will be described by way of the following specific examples, which are given for illustrative purposes only and are not intended to limit the scope of the present invention in any way, and in addition, unless otherwise specified, the conditions or procedures not specifically described are conventional, reagents and materials employed are commercially available, and the following reagents are merely examples for the purpose of making the technical solutions of the present invention more clear and are not intended to be limiting in any way. In the following examples and comparative examples, the "parts", etc. are parts by weight unless otherwise specified.
The main raw material information used in the following examples and comparative examples is specifically as follows:
polyethylene: high-density polyethylene HDPE-8008, fujian United petrifaction;
maleic anhydride grafted polyethylene: PE 1040, exxon Mobil;
dispersing agent: mixing sodium dodecyl sulfate and potassium hexadecyl phosphate according to a mass ratio of 1:1;
an antioxidant: mixing an antioxidant 1010, an antioxidant 168 and an antioxidant DSTDP according to a mass ratio of 2:2:1;
and (3) a lubricant: the mass ratio of the calcium stearate to the ethylene bis-stearamide is 1: 1.
Copper nanowires: brand XFJ, from Jiangsu Xianfeng nanomaterial technology;
conductive carbon black: brand F100A, available from Tianjin Yibosui chemical industry.
Preparation of surface-treated conductive carbon black: adding the materials with the mass ratio of 1 into a three-neck flask: 2, dissolving EVA resin and succinic acid in a certain amount of ethanol solution, adding a small amount of triethylamine, heating to 100 ℃, refluxing and stirring for 2 hours, cooling to 60 ℃, adding 15% sodium hydroxide-ethanol solution, and stirring and reacting for 1 hour to obtain a modified solution; after drying the conductive carbon black at 80 ℃ for 2 hours, it was added to the modified solution and stirred at 50 ℃ for 30 minutes, filtered and the conductive carbon black was dried in an oven at 100 ℃ for 2 hours.
Example 1
50 parts of polyethylene, 30 parts of surface-treated conductive carbon black, 15 parts of copper nanowire, 5 parts of maleic anhydride grafted polyethylene, 0.5 part of dispersing agent, 0.3 part of lubricant and 0.5 part of antioxidant are added into a high-speed mixer to be mixed for 5-15min;
then adding the uniformly mixed materials into a double-screw extruder, mixing, extruding, cooling and granulating to obtain polyethylene composite material granules; wherein the extrusion temperature of each extrusion zone in the twin-screw extruder is 165 ℃, 170 ℃, 180 ℃, 190 ℃ respectively. The results of the performance test are shown in Table 1.
Example 2
60 parts of polyethylene, 25 parts of surface-treated conductive carbon black, 10 parts of copper nanowires, 5 parts of maleic anhydride grafted polyethylene, 0.5 part of dispersing agent, 0.3 part of lubricant and 0.5 part of antioxidant are added into a high-speed mixer to be mixed for 5-15min;
then adding the uniformly mixed materials into a double-screw extruder, mixing, extruding, cooling and granulating to obtain polyethylene composite material granules; wherein the extrusion temperature of each extrusion zone in the twin-screw extruder was 160 ℃, 165 ℃, 175 ℃, 185 ℃, respectively. The results of the performance test are shown in Table 1.
Example 3
70 parts of polyethylene, 20 parts of surface-treated conductive carbon black, 5 parts of copper nanowires, 5 parts of maleic anhydride grafted polyethylene, 0.5 part of dispersing agent, 0.3 part of lubricant and 0.5 part of antioxidant are added into a high-speed mixer to be mixed for 5-15min;
then adding the uniformly mixed materials into a double-screw extruder, mixing, extruding, cooling and granulating to obtain polyethylene composite material granules; wherein the extrusion temperature of each extrusion zone in the twin-screw extruder is 155 ℃, 160 ℃, 170 ℃, 180 ℃ respectively. The results of the performance test are shown in Table 1.
Table 1 examples 1-3 electromagnetic shielding polyethylene material Performance test
| Test item/unit | Test standard | Example 1 | Example 2 | Example 3 |
| Tensile Strength/Mpa | ISO 527 | 33.4 | 30.3 | 26.1 |
| Flexural modulus/Mpa | ISO 178 | 1618 | 1481 | 1233 |
| Izod notched impact strength/KJ/square meter | ISO 180 | 4.1 | 5.7 | 8.2 |
| Surface resistance/Ω | IEC 62631 | 461 | 580 | 712 |
| Thermal conductivity/W/mK | ISO 22007 | 2.11 | 1.78 | 1.53 |
The test conditions in table 1 are respectively:
tensile strength test: 1A type molding sample strip, the stretching speed is 50mm/min;
flexural modulus: sample size 100mm x 10mm x 4mm, experimental speed 2mm/min;
izod notched impact Strength test: sample size 100mm x 10mm x 4mm, a molding gap, test temperature 23 ℃;
surface resistance test: the sample size is a wafer with the diameter of 100mm and the thickness of 2.5mm;
and (3) heat conduction coefficient test: the sample sizes were 50 mm. Times.50 mm. Times.20 mm.
Comparative example 1
50 parts of polyethylene, 30 parts of conductive carbon black which is not subjected to surface treatment, 15 parts of copper nanowire, 5 parts of maleic anhydride grafted polyethylene, 0.5 part of dispersing agent, 0.3 part of lubricant and 0.5 part of antioxidant are added into a high-speed mixer to be mixed for 5-15min;
then adding the uniformly mixed materials into a double-screw extruder, mixing, extruding, cooling and granulating to obtain polyethylene composite material granules; wherein the extrusion temperature of each extrusion zone in the twin-screw extruder is 165 ℃, 170 ℃, 180 ℃, 190 ℃ respectively. The results of the performance test are shown in Table 2.
Comparative example 2
Adding 50 parts of polyethylene, 45 parts of surface-treated conductive carbon black, 5 parts of maleic anhydride grafted polyethylene, 0.5 part of dispersing agent, 0.3 part of lubricant and 0.5 part of antioxidant into a high-speed mixer for mixing for 5-15min;
then adding the uniformly mixed materials into a double-screw extruder, mixing, extruding, cooling and granulating to obtain polyethylene composite material granules; wherein the extrusion temperature of each extrusion zone in the twin-screw extruder is 165 ℃, 170 ℃, 180 ℃, 190 ℃ respectively. The results of the performance test are shown in Table 2.
Comparative example 3
Adding 50 parts of polyethylene, 45 parts of copper nanowire, 5 parts of maleic anhydride grafted polyethylene, 0.5 part of dispersing agent, 0.3 part of lubricant and 0.5 part of antioxidant into a high-speed mixer for mixing for 5-15min;
then adding the uniformly mixed materials into a double-screw extruder, mixing, extruding, cooling and granulating to obtain polyethylene composite material granules; wherein the extrusion temperature of each extrusion zone in the twin-screw extruder is 165 ℃, 170 ℃, 180 ℃, 190 ℃ respectively. The results of the performance test are shown in Table 2.
TABLE 2 results of Performance test of electromagnetic shielding polyethylene materials in example 1 and comparative examples 1-3
| Test item/unit | Test standard | Example 1 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Tensile Strength/Mpa | ISO 527 | 33.4 | 23.1 | 28.7 | 45.2 |
| Flexural modulus/Mpa | ISO 178 | 1618 | 1002 | 1355 | 2449 |
| Izod notched impact strength/KJ/square meter | ISO 180 | 4.1 | 3.5 | 7.8 | 5.9 |
| Surface resistance/Ω | IEC 62631 | 461 | 1557 | 670 | 541 |
| Thermal conductivity/W/mK | ISO 22007 | 2.11 | 1.09 | 1.68 | 0.92 |
As can be seen from the data in table 1 and table 2, the high-performance electromagnetic shielding polyethylene material prepared by the invention has higher contribution to the rigidity and the heat and electric conductivity of the resin material due to the addition of the conductive carbon black subjected to surface treatment and the copper nanowire with higher length-diameter ratio. The untreated conductive carbon black has poor overall performance due to the reduced compatibility with the resin matrix, and the compounded copper nanowire has obvious effect on establishing an electric conduction and heat conduction channel in the material.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The electromagnetic shielding polyethylene material is characterized by being prepared from 50-70 parts of polyethylene, 20-30 parts of surface treatment conductive carbon black, 5-15 parts of metal nanowires, 5 parts of maleic anhydride grafted polyethylene, 0.5 part of dispersing agent, 0.3 part of lubricant and 0.5 part of antioxidant according to parts by weight.
2. The electromagnetic shielding polyethylene material according to claim 1, wherein the polyethylene is one or more selected from the group consisting of high density polyethylene, low density polyethylene, and linear low density polyethylene.
3. The electromagnetic shielding polyethylene material according to claim 1, wherein the surface-treated conductive carbon black is obtained by subjecting conductive carbon black to surface treatment by the following treatment method:
dissolving 1 part of EVA resin and 2 parts of succinic acid in ethanol, adding 1 part of catalyst triethylamine into the mixture, heating to 90-100 ℃, refluxing and stirring for 2-3 hours, and cooling to 60 ℃; adding 15% sodium hydroxide-ethanol solution into the cooled system, and stirring for reacting for 1h to obtain a modified solution;
adding 0.1 part of dried conductive carbon black into the modified solution, stirring for 30-40min at 50-60 ℃, filtering and drying to obtain the surface treatment conductive carbon black.
4. The electromagnetic shielding polyethylene material of claim 1, wherein the metal nanowires are copper nanowires.
5. The electromagnetic shielding polyethylene material according to claim 4, wherein the length of the copper nanowire is 10-30 μm, and the purity of the raw material copper is more than 99%.
6. The electromagnetic shielding polyethylene material according to claim 1, wherein said dispersant is selected from the group consisting of sodium dodecyl sulfate, potassium cetyl phosphate, and a mixture of two or more of guar gum.
7. The electromagnetic shielding polyethylene material according to claim 1, wherein the lubricant is calcium stearate and ethylene bis-stearamide in a mass ratio of 1: 1.
8. The electromagnetic shielding polyethylene material according to claim 1, wherein the antioxidant is a mixture of at least three of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], n-stearyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate, tris (2, 4-di-tert-butylphenyl) phosphite, and dioctadecyl thiodipropionate.
9. A method for producing an electromagnetic shielding polyethylene material according to any one of claims 1 to 8, comprising the steps of:
fully mixing polyethylene, surface-treated conductive carbon black, copper nanowires, maleic anhydride grafted polyethylene, a dispersing agent, a lubricant and an antioxidant according to the weight part ratio to obtain uniform premix;
and adding the premix into a double-screw extruder, mixing, extruding, cooling and granulating to obtain the electromagnetic shielding polyethylene material.
10. The process according to claim 9, wherein in the twin-screw extruder, the extrusion temperature of each extrusion zone is 155-165 ℃, 160-170 ℃ and 160-170 ℃ in sequence 170-180deg.C, 180-190 deg.C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211180392.5A CN117820743A (en) | 2022-09-27 | 2022-09-27 | Electromagnetic shielding polyethylene material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211180392.5A CN117820743A (en) | 2022-09-27 | 2022-09-27 | Electromagnetic shielding polyethylene material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117820743A true CN117820743A (en) | 2024-04-05 |
Family
ID=90506398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211180392.5A Pending CN117820743A (en) | 2022-09-27 | 2022-09-27 | Electromagnetic shielding polyethylene material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117820743A (en) |
-
2022
- 2022-09-27 CN CN202211180392.5A patent/CN117820743A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110591283B (en) | Conductive graphene composite material and preparation method and application thereof | |
| CN107541049B (en) | Graphene-continuous glass fiber reinforced halogen-free flame-retardant weather-resistant PPO/HIPS alloy material and preparation method thereof | |
| CN112852157A (en) | Conductive PPS composite material with good epoxy adhesive force and preparation method thereof | |
| WO2022105134A1 (en) | Low-density conductive polypropylene composition, preparation method therefor, and application thereof | |
| CN112694661A (en) | Electromagnetic shielding polypropylene composite material with heat conduction and wave absorption functions and preparation method thereof | |
| CN112662077B (en) | Antistatic graphene-coated aluminum microsphere modified PP composite material and preparation method thereof | |
| JPH10195311A (en) | Thermoplastic resin molding, material for molding and production of molding | |
| CN111393744B (en) | TPE material with antibacterial conductivity and preparation method thereof | |
| CN113321866A (en) | Laser direct forming polypropylene material and preparation method thereof | |
| CN117820743A (en) | Electromagnetic shielding polyethylene material and preparation method thereof | |
| CN115612211A (en) | Conductive polypropylene composite material and preparation method thereof | |
| CN115433458A (en) | Graphene/carbon fiber reinforced nylon 66 composition and preparation method thereof | |
| CN112341747A (en) | Carbon nanotube modified permanent antistatic ABS material and preparation method thereof | |
| CN108219270B (en) | Antistatic PP modified material and preparation method thereof | |
| CN113897038B (en) | High-heat-resistance PBT composition, and preparation method and application thereof | |
| CN115612196B (en) | Wave-absorbing master batch, polypropylene material, and preparation methods and applications thereof | |
| CN117866325A (en) | Polypropylene composite material with high electromagnetic shielding performance and high weld mark strength retention rate and preparation method thereof | |
| CN117866324A (en) | Short glass fiber reinforced polypropylene composite material with high electromagnetic shielding performance and high weld mark strength retention rate and preparation method thereof | |
| CN117511024A (en) | Polyethylene composite material and preparation method thereof | |
| CN117304641A (en) | Composite antistatic ABS material, and preparation method and application thereof | |
| CN115403924B (en) | Heat-absorbing polyamide composition and preparation method thereof | |
| CN115477813B (en) | PP-based composite material for electromagnetic shielding and preparation method thereof | |
| CN112409690B (en) | High-melt-strength in-situ reinforced polypropylene composite material and preparation method thereof | |
| CN114085511B (en) | Low-warpage high-impact polycarbonate composition and preparation method and application thereof | |
| CN115141484B (en) | PPS composite material for radome material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |