CN115260735B - Wave-absorbing thermoplastic elastomer foam material and preparation method thereof - Google Patents
Wave-absorbing thermoplastic elastomer foam material and preparation method thereof Download PDFInfo
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- CN115260735B CN115260735B CN202210531843.9A CN202210531843A CN115260735B CN 115260735 B CN115260735 B CN 115260735B CN 202210531843 A CN202210531843 A CN 202210531843A CN 115260735 B CN115260735 B CN 115260735B
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- 229920002725 thermoplastic elastomer Polymers 0.000 title claims abstract description 48
- 239000006261 foam material Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 55
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 39
- 229920000128 polypyrrole Polymers 0.000 claims abstract description 37
- 229920001690 polydopamine Polymers 0.000 claims abstract description 36
- 239000002131 composite material Substances 0.000 claims abstract description 30
- 238000005187 foaming Methods 0.000 claims abstract description 30
- 239000006260 foam Substances 0.000 claims abstract description 28
- 239000002135 nanosheet Substances 0.000 claims abstract description 25
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000004014 plasticizer Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 28
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 claims description 27
- 239000000243 solution Substances 0.000 claims description 25
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 20
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 claims description 19
- 238000001746 injection moulding Methods 0.000 claims description 19
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 16
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 claims description 16
- 229920003023 plastic Polymers 0.000 claims description 16
- 239000004033 plastic Substances 0.000 claims description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000000725 suspension Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 238000009210 therapy by ultrasound Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 claims description 9
- 229960001149 dopamine hydrochloride Drugs 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- 229960003638 dopamine Drugs 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 7
- 238000011065 in-situ storage Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000006116 polymerization reaction Methods 0.000 claims description 7
- 229920006345 thermoplastic polyamide Polymers 0.000 claims description 7
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 6
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 6
- 239000004156 Azodicarbonamide Substances 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 5
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 claims description 5
- 235000019399 azodicarbonamide Nutrition 0.000 claims description 5
- 238000003763 carbonization Methods 0.000 claims description 5
- 238000005119 centrifugation Methods 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 5
- MIMDHDXOBDPUQW-UHFFFAOYSA-N dioctyl decanedioate Chemical compound CCCCCCCCOC(=O)CCCCCCCCC(=O)OCCCCCCCC MIMDHDXOBDPUQW-UHFFFAOYSA-N 0.000 claims description 5
- 229930195729 fatty acid Natural products 0.000 claims description 5
- 239000000194 fatty acid Substances 0.000 claims description 5
- 150000004665 fatty acids Chemical class 0.000 claims description 5
- 238000004108 freeze drying Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000002244 precipitate Substances 0.000 claims description 5
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 claims description 5
- 239000006228 supernatant Substances 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 3
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 2
- ZFMQKOWCDKKBIF-UHFFFAOYSA-N bis(3,5-difluorophenyl)phosphane Chemical compound FC1=CC(F)=CC(PC=2C=C(F)C=C(F)C=2)=C1 ZFMQKOWCDKKBIF-UHFFFAOYSA-N 0.000 claims description 2
- 238000010000 carbonizing Methods 0.000 claims description 2
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 claims description 2
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 2
- 239000012279 sodium borohydride Substances 0.000 claims description 2
- 229920002397 thermoplastic olefin Polymers 0.000 claims description 2
- JNXDCMUUZNIWPQ-UHFFFAOYSA-N trioctyl benzene-1,2,4-tricarboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCCC)C(C(=O)OCCCCCCCC)=C1 JNXDCMUUZNIWPQ-UHFFFAOYSA-N 0.000 claims description 2
- NCPXQVVMIXIKTN-UHFFFAOYSA-N trisodium;phosphite Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])[O-] NCPXQVVMIXIKTN-UHFFFAOYSA-N 0.000 claims description 2
- 238000001308 synthesis method Methods 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 10
- 239000011159 matrix material Substances 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 230000003014 reinforcing effect Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract description 2
- 210000004027 cell Anatomy 0.000 description 11
- 239000000047 product Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000002064 nanoplatelet Substances 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000000806 elastomer Substances 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 210000000497 foam cell Anatomy 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- ATKFMEGWDYLXBP-UHFFFAOYSA-N 2-(2,4,5-trichlorophenoxy)ethanol Chemical compound OCCOC1=CC(Cl)=C(Cl)C=C1Cl ATKFMEGWDYLXBP-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002984 plastic foam Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/009—Use of pretreated compounding ingredients
-
- 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
- H05K9/0083—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive non-fibrous particles embedded in an electrically insulating supporting structure, e.g. powder, flakes, whiskers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses a wave-absorbing thermoplastic elastomer foam material and a preparation method thereof, wherein the wave-absorbing thermoplastic elastomer foam material is prepared from the following raw materials in parts by mass: 70-80 parts of thermoplastic resin, 10-20 parts of wave-absorbing powder and 1-10 parts of auxiliary agent; the wave-absorbing powder is a composite material which sequentially coats polydopamine and polypyrrole shells on the MXene nano-sheets. The wave-absorbing powder is used as the reinforcing phase, is added into the matrix under the action of the foaming auxiliary agent, the foam hole regulator and the plasticizer, and after foaming and molding, the tensile strength, the bending strength and the compressive strength of the foam are greatly improved, so that the wave-absorbing powder is beneficial to being applied to the fields of aviation, aerospace, trains, ships and the like. Meanwhile, the wave-absorbing powder material is of a sandwich structure, has good electromagnetic performance, also shows very high microwave performance compared with the like products of foaming, and can be applied to electromagnetic wave absorption and shielding equipment, invisible aircraft parts and the like.
Description
Technical Field
The invention belongs to the field of materials, and relates to a wave-absorbing material, in particular to a wave-absorbing thermoplastic elastomer foam material and a preparation method thereof.
Background
Thermoplastic elastomers such as: polyurethane (TPU), polyolefin (TPO), polyamide (TPA), have better elasticity and low temperature resistance, and excellent processability of plastics, compared to polypropylene (PP), polyethylene (PE), polystyrene (PS), polyvinylidene fluoride (PVDF). The thermoplastic elastomer foam obtained by the foaming process combines the advantages of thermoplastic plastics and foam, has the same good mechanical property as rubber elastomer, lighter weight, better processability and longer service life, and has higher recovery speed after compression.
The two-dimensional MXene nano material is introduced into a system and used as dielectric filler, the dielectric filler has good conductivity, good chemical activity and mechanical property, and the dielectric filler has a huge application prospect in the field of microwave absorption. And the second-level function of dopamine is used as an intermediate to modify the MXene material with high dielectric constant, and the wide adhesiveness of the MXene material can improve the interface interaction of the elastomer composite material and effectively improve the mechanical property and the dielectric property. The MXene nano sheets are mutually entangled to form an isotropic three-dimensional network, which is beneficial to improving the combination property with a matrix, thereby reducing the phenomena that foam holes are easy to crack and collapse in the stressing process of foamed plastic. Because the MXene nano-sheet has a larger length-diameter ratio, the MXene is filled into the thermoplastic matrix, so that the dielectric constant of the material can be improved under the condition of small filling amount, the influence on the mechanical property of the matrix is reduced, and the MXene nano-sheet has multi-benefit development and application in the field of aviation.
Compared with the intermittent molding method and the continuous extrusion method, the injection molding method can increase the stability and accuracy of the product, reduce the material consumption, shorten the molding period and reduce the warping and residual stress of the product. But the quality of the injection molded product is unstable because the rheological properties of the melt filling and the mechanical properties of the product of foaming injection molding depend on the shape and size of the cells, and the factors influencing the shape of the cells are complex. Therefore, more accurate experimental parameters are needed to control cell nucleation and size, and if poorly controlled, mechanical and dielectric properties are affected.
In addition, due to the problems of easy oxidation and the like of the MXene, the mechanical property and the wave absorbing property of the existing MXene thermoplastic material are limited, which greatly limits the application of the material in various fields.
Disclosure of Invention
The invention provides a wave-absorbing thermoplastic elastomer foam material and a preparation method thereof, which are used for overcoming the defects of the prior art.
To achieve the above object, the present invention provides a wave-absorbing thermoplastic elastomer foam material having the following characteristics: the material is prepared from the following raw materials in parts by mass: 70-80 parts of thermoplastic resin, 10-20 parts of wave-absorbing powder and 1-10 parts of auxiliary agent; the wave-absorbing powder is a composite material which sequentially coats polydopamine and polypyrrole shells on the MXene nano-sheets.
Further, the present invention provides a wave-absorbing thermoplastic elastomer foam material, which may also have the following characteristics: the wave-absorbing powder material synthesizing method comprises the following steps: dissolving lithium fluoride (LiF) in hydrochloric acid solution, adding Ti 3 AlC 2 Stirring the powder at 45 ℃ for 36 hours, and obtaining MXene nanosheet suspension after post-treatment; then adding C into the MXene nano-sheet suspension 4 H 12 NO 3 Dissolving, adding dopamine hydrochloride, and carrying out in-situ polymerization of dopamine; and then adding pyrrole and p-toluenesulfonic acid (p-TSA) into the solution, stirring for 6 hours at 0-4 ℃, obtaining black powder after post treatment, and carrying out vacuum carbonization on the black powder to obtain the composite material of the MXene nano-sheet sequentially coated with the polydopamine and the polypyrrole (PPy) shell.
Further, the present invention provides a wave-absorbing thermoplastic elastomer foam material, which may also have the following characteristics: wherein the lithium fluoride, ti 3 AlC 2 、C 4 H 12 NO 3 The mass ratio of the dopamine hydrochloride, the pyrrole and the p-toluenesulfonic acid is 1:1:0.05:0.025:0.01:0.028.
Further, the present invention provides a wave-absorbing thermoplastic elastomer foam material, which may also have the following characteristics: the specific preparation method of the wave-absorbing powder comprises the following steps:
stirring lithium fluoride and a hydrochloric acid solution to completely dissolve the lithium fluoride;
step twoTi is mixed with 3 AlC 2 Slowly adding the powder into the solution, and stirring for 36 hours under the water bath condition of 45 ℃; the pH of the solution is more than 6 by repeated washing; then, repeatedly carrying out ultrasonic treatment and centrifugation under the protection gas to prepare MXene nanosheet suspension;
step three, adding C into the MXene suspension 4 H 12 NO 3 Stirring for 5-30 min to dissolve thoroughly; mixing dopamine hydrochloride in the solution, and stirring for 24 hours at room temperature to complete in-situ polymerization of dopamine;
and fourthly, adding pyrrole and p-toluenesulfonic acid into the obtained solution, carrying out ultrasonic treatment for 30 minutes, stirring at 0-4 ℃ for 6 hours, then repeatedly washing with ethanol and deionized water until the supernatant is clear, collecting precipitate, freeze-drying for 48 hours to obtain black powder, and then carbonizing the black powder in vacuum to obtain the wave-absorbing powder.
Further, the present invention provides a wave-absorbing thermoplastic elastomer foam material, which may also have the following characteristics: wherein the thermoplastic resin is one or more of Thermoplastic Polyurethane (TPU), polyamide (TPAE), polyolefin (TPV) and polyvinyl chloride (TCPE).
Further, the present invention provides a wave-absorbing thermoplastic elastomer foam material, which may also have the following characteristics: wherein the auxiliary agent comprises a foaming auxiliary agent, a foam hole regulator and a plasticizer, and each auxiliary agent accounts for 10-50% of the total mass of the auxiliary agent.
Further, the present invention provides a wave-absorbing thermoplastic elastomer foam material, which may also have the following characteristics: wherein the foaming auxiliary agent is one or more of azodicarbonamide, sodium bicarbonate, sodium borohydride, cyclopentane, nitrogen and sodium phosphite; the foam hole regulator is ZB-530; the plasticizer is one or more of dioctyl sebacate, epoxy fatty acid butyl ester, trioctyl trimellitate and dioctyl adipate.
The invention also provides a preparation method of the wave-absorbing thermoplastic elastomer foam material, which has the following characteristics: the thermoplastic resin, the wave-absorbing powder and the auxiliary agent are extruded and granulated to obtain composite plastic master batch, and then the composite plastic master batch is heated and extruded into a mould to be foamed by adopting an injection molding method, so as to obtain the wave-absorbing thermoplastic elastomer foam material.
Further, the present invention provides a method for producing a wave-absorbing thermoplastic elastomer foam material, which may further have the following features: the method comprises the following steps:
adding thermoplastic resin, wave-absorbing powder and an auxiliary agent into a mixer, premixing until uniform, and then adding into an extruder for extrusion granulation to obtain composite plastic master batch;
injecting the composite plastic master batch into a die cavity of an injection molding machine, heating for 1-4 minutes to foam the polymer, nucleating and growing bubbles, and finally cooling to obtain the wave-absorbing thermoplastic elastomer foam material with the required shape.
Further, the present invention provides a method for producing a wave-absorbing thermoplastic elastomer foam material, which may further have the following features: wherein the temperature of six heating sections from a feed inlet to a nozzle of the injection molding machine are respectively 165, 170, 175, 180, 190 and 200 ℃, the temperature of a mold is controlled at 58 ℃, and the injection speed is controlled at 100cm 3 /s。
The invention has the beneficial effects that: the invention provides a wave-absorbing thermoplastic elastomer foam material and a preparation method thereof. And then blending the thermoplastic resin with the thermoplastic resin, preparing a wave-absorbing master batch by a melt blending method under the action of an organic auxiliary agent, finally heating and extruding the master batch into a mould by adopting an injection molding method to foam, and cooling a foamed sample to obtain the thermoplastic resin elastomer microporous foam material with the required shape. Compared with the conventional foam material, the foam material has the following advantages:
1. according to the invention, the composite material of the polydopamine and the polypyrrole shell sequentially coated on the MXene nanosheets is used as a reinforcing phase, and is added into a matrix under the action of a foaming auxiliary agent, a foam hole regulator and a plasticizer, and after foaming molding, the tensile strength, the bending strength and the compressive strength of foam are greatly improved, so that the composite material is beneficial to being applied to the fields of aviation, aerospace, trains, ships and the like.
2. The composite material sequentially coated with the polydopamine and the polypyrrole shell on the MXene nano sheet has good electromagnetic performance, and also has very high microwave performance compared with the similar foaming products, and can be applied to electromagnetic wave absorption and shielding equipment, invisible aircraft parts and the like. MXene, PDA and PPy form a sandwich structure, more heterogeneous interfaces can be formed, a loss mechanism is effectively increased, attenuation of electromagnetic waves is facilitated, and wide bandwidth under low thickness is realized. In addition, the PPy is coated again, so that partial wave absorbing performance can be compensated. After the PDA is coated and then the PPy is coated, the wave absorbing performance is in the range of 2-18GHz, and when the thickness is only 1.8mm, the maximum bandwidth with the reflection loss smaller than-10 dB can reach 5.09GHz, so that the wave absorbing performance is greatly improved.
3. Compared with the intermittent molding method and the continuous extrusion method, the injection molding method can increase the stability and accuracy of the product, reduce the material consumption, shorten the molding period and reduce the warping and residual stress of the product. The physical foaming agent and the chemical foaming agent are used for foaming comparison, the optimal foaming agent under different conditions is selected, and the nucleation rate of the material can be improved by adjusting other auxiliary agents, so that a cell structure with micro-nano size and high cell density is ensured to be formed. The micropore forming process parameters are optimized, so that foam cells are uniformly distributed, wave-absorbing powder can be directionally gathered along cell walls, an effective three-dimensional network can be formed under lower load, the reinforcing effect is well exerted in thermoplastic resin, the phenomenon that the foam cells are easily broken and collapsed in the stress process of the plastic foam is reduced, and the compression performance of the composite material is improved. And foaming and molding in a specific mold to obtain a workpiece with a required shape to obtain a product.
Drawings
FIG. 1 is an SEM image of a pure MXene nanoplatelet and MXene@PDA@PPy;
FIG. 2 is a conductivity plot of pure MXene nanoplatelets and MXene@PDA@PPy;
FIG. 3 is a graph of reflection loss for PDA@MXene and MXene@PDA@PPy.
Detailed Description
The invention is further illustrated below with reference to specific examples.
Example 1
The embodiment provides a wave-absorbing thermoplastic elastomer foam material which is prepared from the following raw materials in parts by mass: 80 parts of thermoplastic resin, 15 parts of wave-absorbing powder and 5 parts of auxiliary agent. Wherein the thermoplastic resin is Thermoplastic Polyurethane (TPU); the wave-absorbing powder is a composite material which sequentially coats polydopamine and polypyrrole shells on the MXene nano-sheets; the auxiliary agent comprises a foaming auxiliary agent, a cell regulator and a plasticizer, wherein the foaming auxiliary agent is azodicarbonamide (1.5 parts), the cell regulator is ZB-530 (1.5 parts), the auxiliary agent is industrial grade, the plasticizer is dioctyl sebacate (1 part) and epoxy fatty acid butyl ester (1 part).
The preparation method of the wave-absorbing thermoplastic elastomer foam material comprises the following steps:
s1, stirring 1g of lithium fluoride and 20ml of hydrochloric acid (9 mol/L), regulating the rotating speed of a stirrer to 150-400rpm, and reacting for 15min to ensure complete dissolution of LiF;
s2, 1g Ti 3 AlC 2 Slowly adding the powder into the solution, and stirring for 36 hours under the water bath condition of 45 ℃; the pH of the solution is more than 6 by repeated washing; then, repeatedly carrying out ultrasonic treatment and centrifugation under the protection gas to prepare MXene nanosheet suspension;
s3, adding 0.05 to g C to the MXene suspension 4 H 12 NO 3 Stirring for 5-30 min to dissolve thoroughly; mixing 0.025g dopamine hydrochloride in the solution, and stirring for 24 hours at room temperature to complete in-situ polymerization of dopamine;
s4, adding 0.01g of pyrrole and 0.028g of p-toluenesulfonic acid into the obtained solution, carrying out ultrasonic treatment for 30 minutes, stirring at 0-4 ℃ for 6 hours, then repeatedly washing with ethanol and deionized water until the supernatant is clear, collecting precipitate, freeze-drying for 48 hours to obtain black powder, and then carrying out vacuum carbonization on the black powder to obtain wave-absorbing powder, namely, a composite material MXene@PDA@PPy of which the MXene nano-sheets are sequentially coated with polydopamine and polypyrrole shells;
s5, adding the thermoplastic resin, the wave-absorbing powder and the auxiliary agent into a mixer, premixing until uniform, and then adding into an extruder for extrusion granulation to obtain composite plastic master batch;
s6, injecting the composite plastic master batch into a die cavity of an injection molding machine, heating for 1-4 minutes, foaming a polymer, nucleating and growing bubbles, and finally cooling to obtain the wave-absorbing thermoplastic elastomer foam material with the required shape;
wherein, the foaming molding process is carried out by putting the mixture into a specific mold on a Arburg Allrounder injection molding machine equipped with a MuCell SCF conveying technology and an oil heating system, and the temperatures of 6 heating sections from a feed inlet to a nozzle of the injection molding machine are respectively set to 165, 170, 175, 180, 190 and 200 ℃. The die has the following dimensions: 132X 108X 32mm 3 The temperature of the die is controlled at 58 ℃, and the injection speed is controlled at 100cm 3 /s, injection size of 60cm 3 。
Example 2
The embodiment provides a wave-absorbing thermoplastic elastomer foam material which is prepared from the following raw materials in parts by mass: 85 parts of thermoplastic resin, 14.5 parts of wave-absorbing powder and 0.5 part of auxiliary agent. Wherein the thermoplastic resin is Thermoplastic Polyamide (TPAE); the wave-absorbing powder is a composite material which sequentially coats polydopamine and polypyrrole shells on the MXene nano-sheets; the auxiliary agent comprises a foaming auxiliary agent, a cell regulator and a plasticizer, wherein the foaming auxiliary agent is azodicarbonamide (0.15 part), the cell regulator is ZB-530 (0.15 part), the auxiliary agent is industrial grade, the plasticizer is dioctyl sebacate (0.1 part) and epoxy fatty acid butyl ester (0.1 part).
The preparation method of the wave-absorbing thermoplastic elastomer foam material comprises the following steps:
s1, stirring 1g of lithium fluoride and 20ml of hydrochloric acid (9 mol/L), regulating the rotating speed of a stirrer to 150-400rpm, and reacting for 15min to ensure complete dissolution of LiF;
s2, 1g Ti 3 AlC 2 Slowly adding the powder into the solution, and stirring for 36 hours under the water bath condition of 45 ℃; dissolving by repeated washingThe pH value of the liquid is more than 6; then, repeatedly carrying out ultrasonic treatment and centrifugation under the protection gas to prepare MXene nanosheet suspension;
s3, adding 0.05 to g C to the MXene suspension 4 H 12 NO 3 Stirring for 5-30 min to dissolve thoroughly; mixing 0.025g dopamine hydrochloride in the solution, and stirring for 24 hours at room temperature to complete in-situ polymerization of dopamine;
s4, adding 0.01g of pyrrole and 0.028g of p-toluenesulfonic acid into the obtained solution, carrying out ultrasonic treatment for 30 minutes, stirring at 0-4 ℃ for 6 hours, then repeatedly washing with ethanol and deionized water until the supernatant is clear, collecting precipitate, freeze-drying for 48 hours to obtain black powder, and then carrying out vacuum carbonization on the black powder to obtain wave-absorbing powder, namely, a composite material MXene@PDA@PPy of which the MXene nano-sheets are sequentially coated with polydopamine and polypyrrole shells;
s5, adding the thermoplastic resin, the wave-absorbing powder and the auxiliary agent into a mixer, premixing until uniform, and then adding into an extruder for extrusion granulation to obtain composite plastic master batch;
s6, injecting the composite plastic master batch into a die cavity of an injection molding machine, heating for 1-4 minutes, foaming a polymer, nucleating and growing bubbles, and finally cooling to obtain the wave-absorbing thermoplastic elastomer foam material with the required shape;
wherein, the foaming molding process is carried out by putting the mixture into a specific mold on a Arburg Allrounder injection molding machine equipped with a MuCell SCF conveying technology and an oil heating system, and the temperatures of 6 heating sections from a feed inlet to a nozzle of the injection molding machine are respectively set to 165, 170, 175, 180, 190 and 200 ℃. The die has the following dimensions: 132X 108X 32mm 3 The temperature of the die is controlled at 58 ℃, and the injection speed is controlled at 100cm 3 /s, injection size of 60cm 3 。
Example 3
The embodiment provides a wave-absorbing thermoplastic elastomer foam material which is prepared from the following raw materials in parts by mass: 85 parts of thermoplastic resin, 14 parts of wave-absorbing powder and 1 part of auxiliary agent. Wherein the thermoplastic resin is Thermoplastic Polyamide (TPAE); the wave-absorbing powder is a composite material which sequentially coats polydopamine and polypyrrole shells on the MXene nano-sheets; the auxiliary agent comprises a foaming auxiliary agent, a cell regulator and a plasticizer, wherein the foaming auxiliary agent is azodicarbonamide (0.3 part), the cell regulator is ZB-530 (0.3 part), the auxiliary agent is industrial grade, the plasticizer is dioctyl sebacate (0.2 part) and epoxy fatty acid butyl ester (0.2 part).
The preparation method of the wave-absorbing thermoplastic elastomer foam material comprises the following steps:
s1, stirring 1g of lithium fluoride and 20ml of hydrochloric acid (9 mol/L), regulating the rotating speed of a stirrer to 150-400rpm, and reacting for 15min to ensure complete dissolution of LiF;
s2, 1g Ti 3 AlC 2 Slowly adding the powder into the solution, and stirring for 36 hours under the water bath condition of 45 ℃; the pH of the solution is more than 6 by repeated washing; then, repeatedly carrying out ultrasonic treatment and centrifugation under the protection gas to prepare MXene nanosheet suspension;
s3, adding 0.05 to g C to the MXene suspension 4 H 12 NO 3 Stirring for 5-30 min to dissolve thoroughly; mixing 0.025g dopamine hydrochloride in the solution, and stirring for 24 hours at room temperature to complete in-situ polymerization of dopamine;
s4, adding 0.01g of pyrrole and 0.028g of p-toluenesulfonic acid into the obtained solution, carrying out ultrasonic treatment for 30 minutes, stirring at 0-4 ℃ for 6 hours, then repeatedly washing with ethanol and deionized water until the supernatant is clear, collecting precipitate, freeze-drying for 48 hours to obtain black powder, and then carrying out vacuum carbonization on the black powder to obtain wave-absorbing powder, namely, a composite material MXene@PDA@PPy of which the MXene nano-sheets are sequentially coated with polydopamine and polypyrrole shells;
s5, adding the thermoplastic resin, the wave-absorbing powder and the auxiliary agent into a mixer, premixing until uniform, and then adding into an extruder for extrusion granulation to obtain composite plastic master batch;
s6, injecting the composite plastic master batch into a die cavity of an injection molding machine, heating for 1-4 minutes, foaming a polymer, nucleating and growing bubbles, and finally cooling to obtain the wave-absorbing thermoplastic elastomer foam material with the required shape;
wherein, the foaming molding process is carried out by putting the mixture into a specific mold on a Arburg Allrounder injection molding machine equipped with a MuCell SCF conveying technology and an oil heating system, and the temperatures of 6 heating sections from a feed inlet to a nozzle of the injection molding machine are respectively set to 165, 170, 175, 180, 190 and 200 ℃. The die has the following dimensions: 132X 108X 32mm 3 The temperature of the die is controlled at 58 ℃, and the injection speed is controlled at 100cm 3 /s, injection size of 60cm 3 。
Comparative example 1
This comparative example provides a wave-absorbing thermoplastic elastomer foam having substantially the same composition and preparation method as in example 1, except that: no foaming aid was added.
Comparative example 2
This comparative example provides a wave-absorbing thermoplastic elastomer foam having substantially the same composition and preparation method as in example 1, except that: no wave-absorbing powder was added.
Performance test:
the mechanical properties and the wave-absorbing properties of the wave-absorbing thermoplastic elastomer foams of each example and comparative example were tested according to the relevant standards, and the test results are shown in tables 1 and 2.
Table 1 mechanical properties of the wave-absorbing thermoplastic elastomer foams of examples and comparative examples
Table 2 wave absorbing properties of the wave absorbing thermoplastic elastomer foams of examples and comparative examples
As can be seen from Table 1, the mechanical properties of the wave-absorbing thermoplastic elastomer foam material are better than those of other elastomer foam materials after the modified MXene (namely the poly-dopamine and poly-pyrrole shell are sequentially coated) is added, because the uniformity and the dispersibility of the modified MXene in the matrix are best, and the large length-diameter ratio and the inherent reinforcing effect of the modified MXene enable the mechanical properties of the thermoplastic matrix to be improved under the condition of low MXene load. The problems that the viscosity of a matrix is increased, negative effects are generated on foaming, the final density is high and the mechanical property is poor due to the fact that the loading capacity is too large are avoided.
It can be seen from table 2 that the absorption is enhanced after foaming of the thermoplastic elastomer, because on the one hand the modified MXene wave-absorbing material forms a regional conductive network in the matrix, which can bring about good dielectric properties of the material. On the other hand, after foaming, the foam structure is a special structure with the characteristics of a three-dimensional communicated three-dimensional network framework and mutually communicated air holes, and the porous structure is favorable for absorbing electromagnetic waves by the material.
In particular, the structure and properties of the modified MXene absorbing powder (MXene@PDA@PPy) can also be used for explaining the conclusion.
SEM images of pure MXene nanoplatelets obtained in S2 and mxene@pda@ppy obtained in S4 in examples 1-3 are shown in fig. 1, the surface of the pure MXene nanoplatelets is smooth as shown in fig. 1 a, the surface of the MXene nanoplatelets is significantly roughened as shown in fig. 1 b, because of the coating of the PDA, and the small particles apparent above are re-coated PPy particles.
Conductivity tests were performed on pure MXene nanoplatelets obtained in S2 and mxene@pda@ppy obtained in S4 in examples 1-3, and the results are shown in fig. 2. As can be seen from fig. 2, PPy adjusts the excessively high conductivity of MXene and forms a heterostructure with MXene and PDA, effectively increasing the hetero interface and improving the impedance matching of MXene. Higher conductivity results in skin effect and more electromagnetic waves are reflected at the surface rather than absorbed. Therefore, the appropriate conductivity will avoid interface mismatch.
The reflection loss test was performed on PDA@MXene obtained in S3 and MXene@PDA@PPy obtained in S4 in examples 1-3, and the results are shown in FIG. 3. In fig. 3, a and b are three-dimensional and two-dimensional reflection loss diagrams of pda@mxene, and c and d are three-dimensional and two-dimensional reflection loss diagrams of ppy@pda@mxene. As can be seen by comparison, the reflection loss of PPy@PDA@MXene is obviously improved, and the effective bandwidth is also obviously increased. It is shown that the PPy is coated again, and a wide bandwidth at low thickness can be achieved. MXene, PDA and PPy form a sandwich structure, and compared with PDA@MXene or PPy@MXene, more heterogeneous interfaces can be formed, so that a loss mechanism is effectively increased, attenuation of electromagnetic waves is facilitated, and wide bandwidth under low thickness is realized. Furthermore, grafting only Polymers (PDA) on MXene typically results in the consumption of oxygen-containing groups on the MXene moiety, which typically reduces the ability to absorb waves. And PPy is coated again, PPy can occupy part of active center, so that partial wave-absorbing performance is compensated. After the PDA is coated and then the PPy is coated, the wave absorbing performance is in the range of 2-18GHz, and when the thickness is only 1.8mm, the maximum bandwidth with the reflection loss smaller than-10 dB can reach 5.09GHz, so that the wave absorbing performance is greatly improved.
Meanwhile, PPy also improves the stability of MXene. The high oxidation properties of MXene can lead to poor stability, greatly limiting its use. The invention provides a structure for sequentially coating polydopamine and polypyrrole shells on the surface of MXene, and the PDA has strong adhesiveness, is easy to form a film on the surface of MXene, can play a role in protecting a coat, and further, utilizes secondary functional groups of the PDA, thereby being beneficial to coating the surface PPy. The combination of the two can effectively avoid the contact between oxygen and titanium atoms, and can improve the oxidizing property of MXene to a certain extent.
Claims (9)
1. A wave absorbing thermoplastic elastomer foam material characterized by:
the material is prepared from the following raw materials in parts by mass: 70-80 parts of thermoplastic resin, 10-20 parts of wave-absorbing powder and 1-10 parts of auxiliary agent;
the wave-absorbing powder is a composite material which sequentially coats polydopamine and polypyrrole shells on the MXene nano-sheets;
the wave-absorbing powder material synthesis method comprises the following steps: dissolving lithium fluoride in hydrochloric acid solution, adding Ti 3 AlC 2 The powder was stirred at 45℃for 36 hours after passingProcessing to obtain MXene nanosheet suspension; then adding C into the MXene nano-sheet suspension 4 H 12 NO 3 Dissolving, adding dopamine hydrochloride, and carrying out in-situ polymerization of dopamine; and then adding pyrrole and p-toluenesulfonic acid into the solution, stirring for 6 hours at 0-4 ℃, obtaining black powder through post-treatment, and carrying out vacuum carbonization on the black powder to obtain the composite material with the MXene nano-sheets sequentially coated with the polydopamine and the polypyrrole shell.
2. The wave-absorbing thermoplastic elastomer foam of claim 1, wherein:
wherein the lithium fluoride, ti 3 AlC 2 、C 4 H 12 NO 3 The mass ratio of the dopamine hydrochloride, the pyrrole and the p-toluenesulfonic acid is 1:1:0.05:0.025:0.01:0.028.
3. The wave-absorbing thermoplastic elastomer foam of claim 1, wherein:
the specific preparation method of the wave-absorbing powder comprises the following steps:
stirring lithium fluoride and a hydrochloric acid solution to completely dissolve the lithium fluoride;
step two, ti is mixed with 3 AlC 2 Slowly adding the powder into the solution, and stirring for 36 hours under the water bath condition of 45 ℃; the pH of the solution is more than 6 by repeated washing; then, repeatedly carrying out ultrasonic treatment and centrifugation under the protection gas to prepare MXene nanosheet suspension;
step three, adding C into the MXene suspension 4 H 12 NO 3 Stirring for 5-30 min to dissolve thoroughly; mixing dopamine hydrochloride in the solution, and stirring for 24 hours at room temperature to complete in-situ polymerization of dopamine;
and fourthly, adding pyrrole and p-toluenesulfonic acid into the obtained solution, carrying out ultrasonic treatment for 30 minutes, stirring at 0-4 ℃ for 6 hours, then repeatedly washing with ethanol and deionized water until the supernatant is clear, collecting precipitate, freeze-drying for 48 hours to obtain black powder, and then carbonizing the black powder in vacuum to obtain the wave-absorbing powder.
4. The wave-absorbing thermoplastic elastomer foam of claim 1, wherein:
wherein the thermoplastic resin is one or more of thermoplastic polyurethane, polyamide, polyolefin and polyvinyl chloride.
5. The wave-absorbing thermoplastic elastomer foam of claim 1, wherein:
wherein the auxiliary agent comprises a foaming auxiliary agent, a foam hole regulator and a plasticizer, and each auxiliary agent accounts for 10-50% of the total mass of the auxiliary agent.
6. The wave-absorbing thermoplastic elastomer foam of claim 5, wherein:
wherein the foaming auxiliary agent is one or more of azodicarbonamide, sodium bicarbonate, sodium borohydride, cyclopentane, nitrogen and sodium phosphite; the foam hole regulator is ZB-530; the plasticizer is one or more of dioctyl sebacate, epoxy fatty acid butyl ester, trioctyl trimellitate and dioctyl adipate.
7. A method for producing a wave-absorbing thermoplastic elastomer foam according to any one of claims 1 to 6, characterized in that:
the thermoplastic resin, the wave-absorbing powder and the auxiliary agent are extruded and granulated to obtain composite plastic master batch, and then the composite plastic master batch is heated and extruded into a mould to be foamed by adopting an injection molding method, so as to obtain the wave-absorbing thermoplastic elastomer foam material.
8. The method for producing a wave-absorbing thermoplastic elastomer foam according to claim 7, wherein:
the method comprises the following steps:
adding thermoplastic resin, wave-absorbing powder and an auxiliary agent into a mixer, premixing until uniform, and then adding into an extruder for extrusion granulation to obtain composite plastic master batch;
injecting the composite plastic master batch into a die cavity of an injection molding machine, heating for 1-4 minutes to foam the polymer, nucleating and growing bubbles, and finally cooling to obtain the wave-absorbing thermoplastic elastomer foam material with the required shape.
9. The method for producing a wave-absorbing thermoplastic elastomer foam according to claim 8, wherein:
wherein, the temperature of six heating sections from a feed inlet to a nozzle of the injection molding machine are respectively 165, 170, 175, 180, 190 and 200 ℃, the temperature of a mold is controlled at 58 ℃, and the injection speed is controlled at 100cm 3 /s。
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