CN102140186A - Natural rubber composite with electromagnetic shielding property and preparation method thereof - Google Patents

Natural rubber composite with electromagnetic shielding property and preparation method thereof Download PDF

Info

Publication number
CN102140186A
CN102140186A CN201110086976.1A CN201110086976A CN102140186A CN 102140186 A CN102140186 A CN 102140186A CN 201110086976 A CN201110086976 A CN 201110086976A CN 102140186 A CN102140186 A CN 102140186A
Authority
CN
China
Prior art keywords
carbon fiber
electromagnetic shielding
rubber
natural rubber
composite material
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
Application number
CN201110086976.1A
Other languages
Chinese (zh)
Other versions
CN102140186B (en
Inventor
曾宪奎
汪传生
边慧光
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao University of Science and Technology
Original Assignee
Qingdao University of Science and Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Qingdao University of Science and Technology filed Critical Qingdao University of Science and Technology
Priority to CN201110086976.1A priority Critical patent/CN102140186B/en
Publication of CN102140186A publication Critical patent/CN102140186A/en
Application granted granted Critical
Publication of CN102140186B publication Critical patent/CN102140186B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention provides a natural rubber composite with an electromagnetic shielding property. The composite comprises natural rubber, a short carbon fiber and a compounding agent, wherein the diameter of the short carbon fiber is 3-10 mu m, the length of the short carbon fiber is 1-5 mm, and the weight ratio of the natural rubber to the short carbon fiber at room temperature is 100:(0.5-11). Because the physical and mechanical properties of the natural rubber and the short carbon fiber are fully used for preparing the composite with the electromagnetic shielding property, the composite has the good electromagnetic wave absorption property of the short carbon fiber and the good physical and mechanical properties of the rubber material, and can be adaptive to the requirement on various environments. The composite has the advantages that the electromagnetic shielding property is high, the preparation method is simple, the preparation cost is low, and the energy consumption is reduced.

Description

A kind of native rubber composite material and preparation method thereof with capability of electromagnetic shielding
Technical field
The invention belongs to the electromagnetic shielding material field, exactly is a kind of native rubber composite material with capability of electromagnetic shielding and preparation method thereof
Background technology
The electromagnetic interference that electromagenetic wave radiation produces not only can influence the normal operation of various electronicss, also can cause severe impairment for the physical and mental health that is in people in the electromagenetic wave radiation environment for a long time.Because macromolecular material has good physics and mechanical property, therefore develop capability of electromagnetic shielding height, low cost of manufacture, the simple electromagnetic shielding macromolecule material of preparation method and be very important.The metal foil composite bed or the coating of top layer conductivity type electromagnetic shielding macromolecule material are peeled off in the use and the course of processing easily, and mechanical property is relatively poor, therefore use less.The filler that the filled-type composite electromagnetic screen macromolecular material of present more employing is used generally is a metal powder, as is widely used in the conductive rubber in the EMC field, just is to use silver powder and nickel powder to do filler.Chinese patent ZL200820172030.0 discloses " a kind of composite electromagnetic screen rubber " technology, is the mode that adopts two-layer compound or MULTILAYER COMPOSITE, is composited with the functional rubber with capability of electromagnetic shielding by decorating rubber.Functional rubber is made up of the meal that silicon rubber, fluosilicic rubber or terpolymer EP rubber interpolation silver powder, silvered aluminum powder, silvered glass microballon, silver-plated copper powder, silver-plated nickel powder etc. have electromagnetic shielding action.Be that decoration rubber and conductive rubber is compound.Chinese patent 200910068462.6 discloses " made from three-dimensional braided nickel-plated carbon fiber and Resins, epoxy electromagnetic shielding composite material and preparation method ", proposition with carbon fiber electrically nickel plating metal after, carry out three-dimensional four-way braiding, adopt resin transfer molding (RTM) process (RTM) then, the knitted body and the Resins, epoxy of nickel-coated carbon fibers is compound, prepare electromagnetic shielding composite material.In order to reach shield effectiveness, carbon fiber has been carried out surface modification (sensitization processing, metallizing), and woven, to promote the formation of conductive network.Above-mentioned technology is owing to used noble metal materials such as silver, nickel, copper, and employed material only is confined to kinds such as silica gel, fluorine glue, ethylene-propylene diene copolymer, Resins, epoxy.Therefore ubiquity manufacturing cost height, complex process, easily problem such as pollute, be not suitable for large-scale promotion application.
Summary of the invention
The present invention is in order to overcome the defective in the above-mentioned technology, make full use of the natural rubber material and have stretching and tear strength height, the characteristics of good combination properties such as elasticity, wear resistance, binding property, ageing resistance propose a kind of native rubber composite material with capability of electromagnetic shielding and preparation method thereof.
The present invention seeks to realize: a kind of native rubber composite material with capability of electromagnetic shielding by following technical scheme, it is characterized in that this matrix material comprises natural rubber, chopped carbon fiber and Synergist S-421 95, described chopped carbon fiber diameter is 3~10 μ m, its length is 1~5mm, and the normal temperature weight part proportioning of natural rubber and chopped carbon fiber is: 100: 0.5~11.
Because natural rubber is cis 1 more than 98%, the chain macromolecule compound that the 4-polyisoprene constitutes, its comprehensive physical and mechanical properties is better than other any rubber, natural rubber has good flex fatig resistance performance, the dynamic lag loss is little, it is low to give birth to heat, and has good air-tightness, water-repellancy, electrical insulating property and thermal insulation and winter hardiness.Natural rubber belongs to crystallinity rubber, and low temperature descends and the force-extension effect all can produce crystallization, and good from reinforcement, pure glue cross-linked rubber tensile strength can reach 17-25MPa.The process industrial art performance of natural rubber is better than other all rubber.As plasticate, mixing ratio is easier to, Synergist S-421 95 is easy to sneak into, and is uniformly dispersed, and gives birth to less calories, the die mould shrinking percentage is little, green tack is good etc.
Carbon fiber is a kind of conductive filler material preferably, carbon fiber proportion is little, diameter is thin, length-to-diameter ratio is big, have advantages such as high strength, high-modulus, chemical stability be good, easily form conductive network, its electroconductibility is between carbon black and graphite, and it also has corrosion-resistant, radiation hardness, multiple premium properties such as high temperature resistant.Aerospace have been widely used in, material and chemical anticorrosion field with matrix materials such as carbon fiber reinforced unsaturated polyester, epoxy, phenolic aldehyde.But carbon fiber processing difficulties, cost height have limited its development to a certain extent.And the behavior of chopped carbon fiber in rubber matrix is similar to dipole, under electromagnetic field effect, produce polarized dissipation current, around under the matrix effect, dispersion current is attenuated, electromagnetic wave energy is converted to the energy of other form like this, and the chopped carbon fiber rubber composite shows as wave absorbtion to hertzian wave.The variation of chopped carbon fiber content means that variation has taken place the distance between harmonic oscillator, thereby make it present multiple-effect: when content is low to electromagnetic effect, a little less than the interaction between each oscillator, connect each other by impedance between each independent harmonic oscillator, each dipole increases absorption peak to the synergetic result of absorption of electromagnetic wave; When chopped carbon fiber content was increased to a certain degree, power line repelled mutually between close mutually oscillator, and the electric field mutual superposition demonstrates the strong electromagnetic wave reflection characteristic.Increase along with the chopped carbon fiber volume, the chopped carbon fiber rubber composite has conductor characteristics gradually, the reflection of electromagnetic wave rate is increased, and when the chopped carbon fiber volume reached certain value, the chopped carbon fiber rubber composite was changed to reflecting properties by the absorption of electromagnetic wave performance.The chopped carbon fiber that will have conductivity mixes and prepares matrix material in the natural rubber, has both had the advantage of natural rubber, has capability of electromagnetic shielding preferably again.The chopped carbon fiber that mixes has changed the complex phase magnetic permeability and relative dielectric parameter of natural rubber, has improved electromagnetic reflection potential.
The thickness of native rubber composite material of the present invention is 0.5mm~15mm.Can satisfy requirement to electromagnetic shielding material.
Described other Synergist S-421 95s are stearic acid, zinc oxide, anti-aging agent, carbon black, paraffin oil, promotor and vulcanizing agent.
A kind of preparation method with native rubber composite material of capability of electromagnetic shielding, its process is as follows:
(1) chopped carbon fiber is fully disperseed in hollander, dispersion liquid carries out suction filtration and thorough drying, becomes short and cuts dispersive carbon fiber monofilament, and its Fibre diameter is 3~10 μ m, and length is 1~5mm;
(2) natural rubber and the chopped carbon fiber ratio according to normal temperature weight part 100: 0.5~11 is equipped with, other Synergist S-421 95 consumption is equipped with according to a conventional method;
(3) in Banbury mixer or mill, will plasticate by the natural rubber that above-mentioned weight part is equipped with earlier, add chopped carbon fiber and other Synergist S-421 95s then and carry out mixingly, mixing even back compressing tablet obtains rubber unvulcanizate, and rubber unvulcanizate was at room temperature parked 24 hours;
(4) be sulfided into the sheet material that thickness is 0.5mm~15mm.
Other Synergist S-421 95s described in the preparation method are stearic acid, zinc oxide, anti-aging agent, carbon black, paraffin oil, promotor and vulcanizing agent.
This electromagnetic shielding native rubber composite material is through performance test: tensile strength is 14~16MPa, and under the condition of 10K~18GHz, electromagnet shield effect is 62.3~86.6dB.
Advantage of the present invention is: make full use of the good physical and mechanical properties of natural rubber and chopped carbon fiber, make the matrix material of electromagnetic shielding, make it both have the good absorption of electromagnetic wave performance of chopped carbon fiber, have the elastomeric material excellent physical and mechanical properties again, can adapt to the needs of multiple environment; The capability of electromagnetic shielding height, the preparation method is simple, and low cost of manufacture has reduced energy consumption.
Embodiment
Embodiment 1
Chopped carbon fiber is fully disperseed in hollander, and dispersion liquid carries out suction filtration and thorough drying, obtains weak point and cuts dispersive carbon fiber monofilament, and Fibre diameter is 3 μ m, and its length is 1mm; In Banbury mixer or mill, 5min plasticates 100 parts by weight of natural rubber earlier, add 2 parts of stearic acid, 5 parts of zinc oxide, 1 part of anti-aging agent, 60 parts of carbon blacks, 3 parts of chopped carbon fibers, 3 parts of paraffin oils, 1 part of promotor and 2.5 parts of sulphur then by weight successively, carry out mixing 8min again, mixing even back compressing tablet obtains rubber unvulcanizate; Rubber unvulcanizate was at room temperature parked 24 hours, sulfidization molding on the 50T vulcanizing press then, cure conditions is 140 ℃ * 30min, obtains goods.
Through performance test, the tensile strength of this electromagnetic shielding native rubber composite material is 14MPa, and under the condition of 10K~18GHz, electromagnet shield effect is 62.3~75.6dB.
Embodiment 2
Chopped carbon fiber is fully disperseed in hollander, and dispersion liquid carries out suction filtration and thorough drying, obtains weak point and cuts dispersive carbon fiber monofilament, and Fibre diameter is 6 μ m, and its length is 3mm; In Banbury mixer or mill, 5min plasticates 100 parts by weight of natural rubber earlier, add 2 parts of stearic acid, 5 parts of zinc oxide, 1 part of anti-aging agent, 60 parts of carbon blacks, 7 parts of chopped carbon fibers, 3 parts of paraffin oils, 1 part of promotor and 2.5 parts of sulphur then by weight successively, carry out mixing 8min again, mixing even back compressing tablet obtains rubber unvulcanizate; Rubber unvulcanizate was at room temperature parked 24 hours, sulfidization molding on the 50T vulcanizing press then, cure conditions is 140 ℃ * 30min, obtains goods.
Through performance test, the tensile strength of this electromagnetic shielding native rubber composite material is 15MPa, and under the condition of 10K~18GHz, electromagnet shield effect is 68.2~82.4dB.
Embodiment 3
Chopped carbon fiber is fully disperseed in hollander, and dispersion liquid carries out suction filtration and thorough drying, obtains weak point and cuts dispersive carbon fiber monofilament, and Fibre diameter is 10 μ m, and its length is 5mm; In Banbury mixer or mill, 5min plasticates 100 parts by weight of natural rubber earlier, add 2 parts of stearic acid, 5 parts of zinc oxide, 1 part of anti-aging agent, 60 parts of carbon blacks, 11 parts of chopped carbon fibers, 3 parts of paraffin oils, 1 part of promotor and 2.5 parts of sulphur then by weight successively, carry out mixing 8min again, mixing even back compressing tablet obtains rubber unvulcanizate; Rubber unvulcanizate was at room temperature parked 24 hours, sulfidization molding on the 50T vulcanizing press then, cure conditions is 140 ℃ * 30min, obtains goods.
Through performance test, the tensile strength of this electromagnetic shielding native rubber composite material is 16MPa, and under the condition of 10K~18GHz, electromagnet shield effect is 72.6~86.6dB.

Claims (5)

1. native rubber composite material with capability of electromagnetic shielding, it is characterized in that this matrix material comprises natural rubber, chopped carbon fiber and Synergist S-421 95, described chopped carbon fiber diameter is 3~10 μ m, its length is 1~5mm, and the normal temperature weight part proportioning of natural rubber and chopped carbon fiber is: 100: 0.5~11.
2. a kind of native rubber composite material with capability of electromagnetic shielding according to claim 1, the thickness that it is characterized in that native rubber composite material is 0.5mm~15mm.
3. a kind of native rubber composite material with capability of electromagnetic shielding according to claim 1 is characterized in that described other Synergist S-421 95s are stearic acid, zinc oxide, anti-aging agent, carbon black, paraffin oil, promotor and vulcanizing agent.
4. preparation method with native rubber composite material of capability of electromagnetic shielding is characterized in that:
(1) chopped carbon fiber is fully disperseed in hollander, dispersion liquid carries out suction filtration and thorough drying, becomes short and cuts dispersive carbon fiber monofilament, and its Fibre diameter is 3~10 μ m, and length is 1~5mm;
(2) natural rubber and the chopped carbon fiber ratio according to normal temperature weight part 100: 0.5~11 is equipped with, other Synergist S-421 95 consumption is equipped with according to a conventional method;
(3) in Banbury mixer or mill, will plasticate by the natural rubber that above-mentioned weight part is equipped with earlier, add chopped carbon fiber and other Synergist S-421 95s then and carry out mixingly, mixing even back compressing tablet obtains rubber unvulcanizate, and rubber unvulcanizate was at room temperature parked 24 hours;
(4) be sulfided into the sheet material that thickness is 0.5mm~15mm.
5. a kind of preparation method with native rubber composite material of capability of electromagnetic shielding according to claim 4 is characterized in that described other Synergist S-421 95s are stearic acid, zinc oxide, anti-aging agent, carbon black, paraffin oil, promotor and vulcanizing agent.
CN201110086976.1A 2011-04-08 2011-04-08 Natural rubber composite with electromagnetic shielding property and preparation method thereof Expired - Fee Related CN102140186B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201110086976.1A CN102140186B (en) 2011-04-08 2011-04-08 Natural rubber composite with electromagnetic shielding property and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201110086976.1A CN102140186B (en) 2011-04-08 2011-04-08 Natural rubber composite with electromagnetic shielding property and preparation method thereof

Publications (2)

Publication Number Publication Date
CN102140186A true CN102140186A (en) 2011-08-03
CN102140186B CN102140186B (en) 2013-04-10

Family

ID=44407994

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201110086976.1A Expired - Fee Related CN102140186B (en) 2011-04-08 2011-04-08 Natural rubber composite with electromagnetic shielding property and preparation method thereof

Country Status (1)

Country Link
CN (1) CN102140186B (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104558729A (en) * 2014-02-21 2015-04-29 泌阳恒茂服饰制品有限公司 Production process of heating unit
CN104592567A (en) * 2014-02-20 2015-05-06 泌阳恒茂服饰制品有限公司 Heat generation body construction method
CN105086472A (en) * 2015-09-24 2015-11-25 中国工程物理研究院核物理与化学研究所 Carbon-based porous flexible composite wave-absorbing material and preparation method thereof
CN105400136A (en) * 2015-11-13 2016-03-16 太仓荣中机电科技有限公司 Corrosion-resistance electromagnetic shielding material
CN105754151A (en) * 2014-12-16 2016-07-13 北京橡胶工业研究设计院 Chopped carbon fiber-containing rubber composition for tire side wall
CN106046441A (en) * 2016-07-04 2016-10-26 沈阳化工大学 Eucommia ulmoides gum composite with electromagnetic-shielding performance and preparation method thereof
CN107325344A (en) * 2017-07-14 2017-11-07 青岛科技大学 A kind of resisting salt fog corrosion electromagnetic shielding composite material and preparation method thereof
CN107459682A (en) * 2017-09-25 2017-12-12 芜湖凯奥尔环保科技有限公司 A kind of preparation method of fibre reinforced rubber composite
CN107459683A (en) * 2017-09-25 2017-12-12 芜湖凯奥尔环保科技有限公司 A kind of preparation method of carbon fiber surface modification rubber composite
CN108484948A (en) * 2018-04-11 2018-09-04 深圳市博恩实业有限公司 Have high heat conduction and the composite material and preparation method of electro-magnetic screen function
CN105555112B (en) * 2016-01-22 2018-09-18 武汉理工大学 A kind of electromagnetic shielding composite material
CN110229390A (en) * 2019-07-30 2019-09-13 青岛科技大学 A kind of natural rubber lagging material of modified chopped carbon fiber and preparation method thereof
CN110358305A (en) * 2019-07-10 2019-10-22 平湖阿莱德实业有限公司 A kind of powder filled elastomer of nickel plating and preparation method thereof having excellent weather resistance
CN111423632A (en) * 2020-05-13 2020-07-17 江苏雷兹盾材料科技有限公司 High-elasticity conductive rubber shielding composite material and preparation method thereof
CN115109369A (en) * 2021-03-22 2022-09-27 南开大学 Composite material, preparation method and application thereof
CN115124843A (en) * 2022-05-25 2022-09-30 浙江理工大学 Electromagnetic shielding composite material with low reflection characteristic and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1751089A (en) * 2002-12-19 2006-03-22 兰爱克谢斯德国有限责任公司 Conductive thermoplastics with carbon black and carbon nanofibrils
CN101050284A (en) * 2006-04-05 2007-10-10 中国科学院金属研究所 Electromagnetic shielding macromolecule composite material
JP2010192550A (en) * 2009-02-17 2010-09-02 Furukawa Electric Co Ltd:The Electromagnetic wave shielding composition, molded body of electromagnetic wave shielding composition, electromagnetic wave shielding sheet, and electric wire for electromagnetic wave shielding

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1751089A (en) * 2002-12-19 2006-03-22 兰爱克谢斯德国有限责任公司 Conductive thermoplastics with carbon black and carbon nanofibrils
CN101050284A (en) * 2006-04-05 2007-10-10 中国科学院金属研究所 Electromagnetic shielding macromolecule composite material
JP2010192550A (en) * 2009-02-17 2010-09-02 Furukawa Electric Co Ltd:The Electromagnetic wave shielding composition, molded body of electromagnetic wave shielding composition, electromagnetic wave shielding sheet, and electric wire for electromagnetic wave shielding

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
《Composites Part A-Applied science and manufacturing》 20000824 N.C. Das, et al Electromagnetic interference shielding effectiveness of carbon black and carbon fibre filled EVA and NR based composites 1069-1081 1-5 第31卷, 第10期 *
《特种橡胶制品》 20071231 杨绪迎 导电橡胶在电磁屏蔽领域中的应用研究 第53-57页 1-5 第28卷, 第6期 *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104592567A (en) * 2014-02-20 2015-05-06 泌阳恒茂服饰制品有限公司 Heat generation body construction method
CN104558729A (en) * 2014-02-21 2015-04-29 泌阳恒茂服饰制品有限公司 Production process of heating unit
CN105754151A (en) * 2014-12-16 2016-07-13 北京橡胶工业研究设计院 Chopped carbon fiber-containing rubber composition for tire side wall
CN105086472A (en) * 2015-09-24 2015-11-25 中国工程物理研究院核物理与化学研究所 Carbon-based porous flexible composite wave-absorbing material and preparation method thereof
CN105400136A (en) * 2015-11-13 2016-03-16 太仓荣中机电科技有限公司 Corrosion-resistance electromagnetic shielding material
CN105555112B (en) * 2016-01-22 2018-09-18 武汉理工大学 A kind of electromagnetic shielding composite material
CN106046441A (en) * 2016-07-04 2016-10-26 沈阳化工大学 Eucommia ulmoides gum composite with electromagnetic-shielding performance and preparation method thereof
CN107325344A (en) * 2017-07-14 2017-11-07 青岛科技大学 A kind of resisting salt fog corrosion electromagnetic shielding composite material and preparation method thereof
CN107325344B (en) * 2017-07-14 2019-03-08 青岛科技大学 A kind of resisting salt fog corrosion electromagnetic shielding composite material and preparation method thereof
CN107459683A (en) * 2017-09-25 2017-12-12 芜湖凯奥尔环保科技有限公司 A kind of preparation method of carbon fiber surface modification rubber composite
CN107459682A (en) * 2017-09-25 2017-12-12 芜湖凯奥尔环保科技有限公司 A kind of preparation method of fibre reinforced rubber composite
CN108484948A (en) * 2018-04-11 2018-09-04 深圳市博恩实业有限公司 Have high heat conduction and the composite material and preparation method of electro-magnetic screen function
CN110358305A (en) * 2019-07-10 2019-10-22 平湖阿莱德实业有限公司 A kind of powder filled elastomer of nickel plating and preparation method thereof having excellent weather resistance
CN110229390A (en) * 2019-07-30 2019-09-13 青岛科技大学 A kind of natural rubber lagging material of modified chopped carbon fiber and preparation method thereof
CN111423632A (en) * 2020-05-13 2020-07-17 江苏雷兹盾材料科技有限公司 High-elasticity conductive rubber shielding composite material and preparation method thereof
CN115109369A (en) * 2021-03-22 2022-09-27 南开大学 Composite material, preparation method and application thereof
CN115124843A (en) * 2022-05-25 2022-09-30 浙江理工大学 Electromagnetic shielding composite material with low reflection characteristic and preparation method thereof

Also Published As

Publication number Publication date
CN102140186B (en) 2013-04-10

Similar Documents

Publication Publication Date Title
CN102140186B (en) Natural rubber composite with electromagnetic shielding property and preparation method thereof
CN102153869B (en) Low-density high-strength conductive rubber and preparation method thereof
Lee et al. Low percolation 3D Cu and Ag shell network composites for EMI shielding and thermal conduction
CN102206371B (en) Reclaimed rubber composite material with electromagnetic shielding performance and preparation method thereof
CN101085842A (en) Method for preparing electromagnetic shielding plastic master batch and composite plastic
CN104711443A (en) Graphene/copper composite and preparation method thereof
CA2548835A1 (en) Enhanced performance conductive filler and conductive polymers made therefrom
CN111391440A (en) Insulating and heat-conducting polymer composite material with frequency-selective electromagnetic shielding function and preparation method thereof
CN109206961A (en) A kind of graphene conductive heat-conductive coating and preparation method thereof
CN1927936A (en) Modified phenolic resin/graphite based conducting composite material and preparation process thereof
CN1305359C (en) Electromagnetic wave interference preventive material and production thereof
CN110712400B (en) Method for preparing layered carbon fiber electromagnetic shielding composite material by using three-dimensional carbon/ferroferric oxide Koch layered layer
CN102675848A (en) Carbon fibre-reinforced flaky moulding material for shielding electromagnetic waves as well as preparation method and application
CN101605447A (en) Anti-electromagnetic wave particle material
CN113270606A (en) High-strength graphite bipolar plate and preparation method thereof
CN104470344A (en) Electromagnetic shielding composite material and preparation method thereof
CN103496228A (en) Structural conductive silicone rubber for electromagnetic shielding and preparation
CN109108291B (en) Preparation process of carbon fiber reinforced pantograph slide plate
CN101567239A (en) Positive temperature coefficient over-current protection device and preparation method
Dhakate et al. A low-density graphite-polymer composite as a bipolar plate for proton exchange membrane fuel cells
CN102206365B (en) Rubber powder composite material with electromagnetic shielding effectiveness, and preparation method thereof
CN102074714A (en) Method for preparing fuel cell bipolar plate by using transition metal-graphite interlayer complex as filler
CN116083060A (en) Composite heat and electricity conducting material formed by carbon fiber based on ASPN (advanced manufacturing process) treatment technology
CN106800705B (en) Polypropylene/ethylene propylene diene monomer/nickel-plated glass fiber functional composite material
CN110358305A (en) A kind of powder filled elastomer of nickel plating and preparation method thereof having excellent weather resistance

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130410

CF01 Termination of patent right due to non-payment of annual fee