CN106190023A - A kind of electromagnetic shielding composite material and preparation method thereof - Google Patents
A kind of electromagnetic shielding composite material and preparation method thereof Download PDFInfo
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- CN106190023A CN106190023A CN201610648722.7A CN201610648722A CN106190023A CN 106190023 A CN106190023 A CN 106190023A CN 201610648722 A CN201610648722 A CN 201610648722A CN 106190023 A CN106190023 A CN 106190023A
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- electromagnetic shielding
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Abstract
The invention belongs to electromagnetic shielding material and refractory material crossing domain, relate generally to a kind of electromagnetic shielding composite material and preparation method thereof, this composite includes SiC fibre reinforcement, resin carbon boundary layer and Si O C matrix, and resin carbon boundary layer is between SiC fibre reinforcement and Si O C matrix.Composite prepared by the present invention not only has electro-magnetic screen function, and can use in 900 DEG C of high temperature oxidation stability atmosphere.Composite prepared by present invention shielding electromagnetic waves usefulness in 8.2～12.4GHz frequency ranges reaches more than 25dB, and can by change the thickness of pyrolytic carbon boundary layer realize shield effectiveness optimization and from be absorbed as leading and be reflected into main between transformation, after composite aoxidizes 4h in 900 DEG C of air, shield effectiveness remains at more than 16dB.
Description
Technical field
The invention belongs to electromagnetic shielding material and refractory material crossing domain, particularly to a kind of electromagnetic shielding composite material
And preparation method thereof.
Technical background
While various electronic machines and equipment offer convenience to the production of people, life, the electromagnetic wave of release is the most gradually
Become the polluter in space, not only work the mischief to human physical and mental health, and affect the normal work of precision instrument.Additionally,
Electromagenetic wave radiation is revealed and is the most increasingly subject to people's attention as a kind of mode causing military affairs, business to be divulged a secret.Electromagnetic shielding
Material is the important way effectively realizing electromangnetic spectrum, and correlation technique report is more and more.
The preparation method of report electromagnetic shielding material is to be filled into by the material with carbon element of Magnaglo or conduction mostly at present
In resin matrix or by Magnaglo and material with carbon element compression molding.Such as, the one of Chinese patent CN104419107A invention
Polymer base electromagnetic screen material based on carbon fiber and Graphene and preparation method thereof, can keep carbon fiber and Graphene poly-
The internal network structure keeping mutually being wound around of compound, is conducive to forming efficient electronic transport network, prepared electricity in matrix
The effectiveness that magnetic shielding material has not only had, the most also has good comprehensive mechanical property and heat conductivity.Such as
Chinese patent CN101451057A announces a kind of bamboo charcoal base electro-magnetic screen composite material and preparation method thereof, and bamboo is made bamboo charcoal
Powder, then the additive and magnetic powder that produce metallic are mixed by the method for solution blending with bamboo charcoal powder, the most again with idol
Connection agent and fluoropolymer resin mixing, the most compressing, calcining, obtain bamboo charcoal base electro-magnetic screen composite material, be characterized in
Capability of electromagnetic shielding is higher, shield effectiveness in 500MHz～1.5GHz frequency range more than 40dB.The easy oxygen of graphite matrix high temperature
Changing, resin matrix high temperature easily decomposes, and applies and loses magnetism under more magnetic filler high temperature, is unfavorable for capability of electromagnetic shielding
Play.
Summary of the invention
For defect of the prior art and deficiency, the invention provides a kind of electromagnetic shielding composite material and preparation side thereof
Method, the electroconductive resin carbon boundary layer in electromagnetic shielding composite material is distributed in contiguous network shape in the composite, it is possible to ensure
The preferable capability of electromagnetic shielding of composite, composite fiber prepared by the present invention is SiC, and matrix is Si-O-C, it is ensured that
Composite is the most high temperature resistant, antioxygenic property.
For reaching above-mentioned purpose, the present invention proposes following technical solution:
A kind of electromagnetic shielding composite material, this composite includes SiC fibre reinforcement, resin carbon boundary layer and Si-O-C
Matrix, resin carbon boundary layer is between SiC fibre reinforcement and Si-O-C matrix.
Concrete, described SiC fibre reinforcement accounts for the 40% of electromagnetic shielding composite material volume fraction.
More specifically, SiC fibre reinforcement is the precast body of continuous fiber braiding, and its structure is the 2.5 shallow curved friendships of dimension
Link structure, thread count be respectively 6 bundles/centimetre and 8 restraint/centimetre.
Concrete, the thickness of described resin carbon boundary layer is 0.2～2 μm.
Concrete, described Si-O-C matrix accounts for the 40%～42% of electromagnetic shielding composite material volume fraction, Si-O-C
The porosity of matrix is 18%～20%.
The preparation method of described electromagnetic shielding composite material, including using dipping pyrolysismethod on SiC fibre reinforcement
Prepare resin carbon boundary layer；Polymer vacuum infiltration pyrolysismethod is prepared in the SiC fiber reinforcement body with resin carbon boundary layer
Si-O-C matrix.
Further, dipping pyrolysismethod is prepared resin carbon boundary layer on SiC fibre reinforcement and is included: molten with phenolic resin
Liquid is precursor, and argon is as protective gas, and pyrolysis temperature is 800～1000 DEG C, temperature retention time 2h.
Concrete, in parts by weight, the concentration of described phenol resin solution is 10%～30%.
Further, polymer vacuum infiltration pyrolysismethod is made in the SiC fiber reinforcement body with resin carbon boundary layer
Standby Si-O-C matrix includes: with polysiloxanes xylene solution as presoma, polysiloxanes mass fraction in dimethylbenzene is
20%～40%, pyrolysis temperature 900～1300 DEG C, temperature retention time 2h, dipping pyrolysis cyclical number of times is 12 times.
Concrete, described SiC fibre reinforcement is the fiber preform being woven into continuous SiC fiber, fibre preforms
The structure of body is that the curved company of shallow friendship 2.5 ties up structure.
Advantages of the present invention is:
(1) the electroconductive resin carbon boundary layer prepared by this method is distributed in contiguous network shape in the composite, it is possible to protect
The card preferable capability of electromagnetic shielding of composite.
(2) composite fiber prepared by the present invention is SiC, and matrix is Si-O-C, it is ensured that composite is the most resistance to
High temperature, antioxygenic property.
Accompanying drawing explanation
Fiber preform structural representation used by Fig. 1 present invention；
The present invention is described in further detail for following example.
Detailed description of the invention
The electromagnetic shielding composite material of the present invention includes SiC fibre reinforcement, resin carbon boundary layer and Si-O-C matrix, tree
Fat carbon boundary layer is distributed between SiC fibre reinforcement and Si-O-C matrix and in contiguous network shape.
Described preparation method includes: dipping pyrolysismethod prepares resin carbon boundary layer on precast body SiC fibre reinforcement；
Polymer vacuum infiltration pyrolysismethod prepares Si-O-C matrix in the precast body with resin carbon boundary layer SiC fibre reinforcement.
Dipping pyrolysismethod includes: with phenolic resin ethanol solution as precursor, prepares resin carbon interface by dipping pyrolysis
Layer, phenolic resin concentration is 10%～30% according to mass fraction, and pyrolysis temperature is 800～1000 DEG C, and temperature retention time is 2h；
Use polymer vacuum infiltration pyrolysismethod to prepare Si-O-C matrix to include: with polysiloxanes xylene solution as forerunner
Body, polysiloxanes mass fraction in dimethylbenzene is 20%～40%, pyrolysis temperature 900～1300 DEG C, temperature retention time 2h, leaching
Stain pyrolysis cyclical number of times is 12 times, prepares the composite porosity 18%～20%.
Preferably, resin carbon boundary layer preparation technology parameter is: phenolic resin concentration is respectively 10% according to mass fraction,
15%, 20%, 25% and 30%, pyrolysis temperature is 1000 DEG C, and temperature retention time is 2h, and protective gas is argon；Si-O-C matrix
Technological parameter includes: polysiloxanes mass fraction in dimethylbenzene is respectively 30%, pyrolysis temperature 1100 DEG C, temperature retention time
2h, protective gas be argon dipping pyrolysis cyclical number of times be 12 times.
The continuous SiC fiber of the resinous carbon boundary layer that the present invention proposes strengthens Si-O-C base electro-magnetic screen composite material,
There is high temperature resistant, antioxidative feature, and can be by changing the thickness of resin carbon boundary layer, it is achieved shielding mechanism be absorbed as main with
It is reflected into the transformation between master.
The following is the embodiment that inventor provides, the invention is not restricted to below example, in the scope that the present invention is given
In, all can prepare capability of electromagnetic shielding, high temperature resistant, the preferable composite of antioxygenic property.
Embodiment 1:
Continuous SiC fiber is woven into fiber preform, and as shown in Figure 1, precursor structure is that the curved company of shallow friendship 2.5 ties up to structure
Structure, fiber volume fraction is 40%；With phenolic resin ethanol solution as precursor, prepare resin carbon interface by dipping pyrolysis
Layer, phenolic resin concentration is 10% according to mass fraction, and pyrolysis temperature is 1000 DEG C, and temperature retention time is 2h；Employing polymer is true
Empty infiltration pyrolysismethod prepares Si-O-C matrix, and preparation polysiloxanes xylene solution is presoma, and polysiloxanes is in dimethylbenzene
Mass fraction be 30%, fiber preform is put into bottle,suction, evacuation, opens valve, make precursor solution flow into bottle
In, close Dewar bottle pump after 5 minutes, take out precast body, put into vacuum drying oven pyrolysis, pyrolysis temperature 1100 DEG C, insulation after drying
Time 2h, takes out and continues dipping pyrolysis, and dipping pyrolysis cyclical number of times is 12 times, prepares the composite porosity 18～20%.Right
Composite prepared by embodiment 1 is characterized, and recording pyrolytic carbon boundary layer average thickness is 0.2 μm；Electromagnetic wave shielding
Can test result show, total electromagnet shield effect is more than 18dB, and absorption is main shielding mechanism.
Embodiment 2:
The present embodiment is as different from Example 1: the phenol resin solution concentration preparing resin carbon boundary layer is 15%.Its
His technological parameter is same as in Example 1.
Being characterized the composite of embodiment 2 preparation, resin carbon interfacial layer thickness increases to average 0.6 μm.Electricity
Magnetic shield performance test result shows, total electromagnet shield effect is more than 20dB, compared with Example 1, absorbs and imitates electromagnetic shielding
The contribution of energy weakens.After aoxidizing 4h in 900 DEG C of air of composite, shield effectiveness remains at more than 15dB.
Embodiment 3:
The present embodiment is as different from Example 1: the phenol resin solution concentration preparing resin carbon boundary layer is 20%.Its
His technological parameter is same as in Example 1.
Being characterized the composite of embodiment 2 preparation, resin carbon interfacial layer thickness increases to average 1.0 μm.Electricity
Magnetic shield performance test result shows, total electromagnet shield effect is more than 30dB, compared with Example 2, absorbs and imitates electromagnetic shielding
The contribution of energy weakens.
Embodiment 4:
The present embodiment is as different from Example 1: the phenol resin solution concentration preparing resin carbon boundary layer is 25%.Its
His technological parameter is same as in Example 1.
Being characterized the composite of embodiment 2 preparation, resin carbon interfacial layer thickness increases to average 1.4 μm.Electricity
Magnetic shield performance test result shows, total electromagnet shield effect is more than 25dB, compared with Example 3, absorbs and imitates electromagnetic shielding
The contribution of energy weakens.
Embodiment 5:
The present embodiment is as different from Example 1: the phenol resin solution concentration preparing resin carbon boundary layer is 30%.Its
His technological parameter is same as in Example 1.
Being characterized the composite of embodiment 2 preparation, resin carbon interfacial layer thickness increases to average 2.0 μm.Electricity
Magnetic shield performance test result shows, total electromagnet shield effect is more than 22dB, compared with Example 1, absorbs and imitates electromagnetic shielding
The contribution of energy weakens.
Claims (10)
1. an electromagnetic shielding composite material, it is characterised in that this composite includes SiC fibre reinforcement, resin carbon interface
Layer and Si-O-C matrix, resin carbon boundary layer is between SiC fibre reinforcement and Si-O-C matrix.
2. electromagnetic shielding composite material as claimed in claim 1, it is characterised in that described SiC fibre reinforcement accounts for electromagnetism
The 40% of shielding composite volume fraction.
3. electromagnetic shielding composite material as claimed in claim 2, it is characterised in that SiC fibre reinforcement is that continuous fiber is compiled
The precast body knitted, its structure is the 2.5 shallow curved commissure structures of dimension, thread count be respectively 6 bundles/centimetre and 8 bundle/centimetre.
4. electromagnetic shielding composite material as claimed in claim 1, it is characterised in that the thickness of described resin carbon boundary layer is
0.2～2 μm.
5. electromagnetic shielding composite material as claimed in claim 1, it is characterised in that described Si-O-C matrix accounts for electromagnetic shielding
The 40%～42% of composite volume fraction, the porosity of Si-O-C matrix is 18%～20%.
6. the preparation method of the electromagnetic shielding composite material described in claim 1,2,3,4 or 5, it is characterised in that include using
Dipping pyrolysismethod prepares resin carbon boundary layer on SiC fibre reinforcement；Polymer vacuum infiltration pyrolysismethod is with resin carbon
Preparation Si-O-C matrix in the SiC fiber reinforcement body of boundary layer.
7. the preparation method of electromagnetic shielding composite material as claimed in claim 6, it is characterised in that dipping pyrolysismethod is at SiC
Preparing resin carbon boundary layer on fibre reinforcement to include: with phenol resin solution as precursor, argon is as protective gas, pyrolysis
Temperature is 800～1000 DEG C, temperature retention time 2h.
8. the preparation method of electromagnetic shielding composite material as claimed in claim 7, it is characterised in that in parts by weight, institute
The concentration of the phenol resin solution stated is 10%～30%.
9. the preparation method of electromagnetic shielding composite material as claimed in claim 6, it is characterised in that polymer vacuum infiltration heat
Solution is prepared Si-O-C matrix in the SiC fiber reinforcement body with resin carbon boundary layer and is included: molten with polysiloxanes dimethylbenzene
Liquid is presoma, and polysiloxanes mass fraction in dimethylbenzene is 20%～40%, pyrolysis temperature 900～1300 DEG C, insulation
Time 2h, dipping pyrolysis cyclical number of times is 12 times.
10. the preparation method of electromagnetic shielding composite material as claimed in claim 6, it is characterised in that described SiC fiber increases
The fiber preform that Qiang Tiwei continuous SiC fiber is woven into, the structure of fiber preform is that the curved company of shallow friendship 2.5 ties up structure.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106631080A (en) * | 2017-01-25 | 2017-05-10 | 厦门大学 | Manufacturing method of Si-O-C ceramic flexible substrate |
| CN108638619A (en) * | 2018-03-14 | 2018-10-12 | 华南理工大学 | Impact-resistant electromagnetic shielding laminate of one kind and the preparation method and application thereof |
| CN110325756A (en) * | 2017-03-16 | 2019-10-11 | 舍弗勒技术股份两合公司 | Wet friction material with the increased pressures cycle service life |
| CN116178042A (en) * | 2022-03-22 | 2023-05-30 | 中国科学院上海硅酸盐研究所 | Complex-phase ceramic material for electromagnetic shielding and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103923601A (en) * | 2013-12-20 | 2014-07-16 | 西北工业大学 | Preparation method of structure/microwave absorbing integrated composite material |
| CN104446656A (en) * | 2014-12-15 | 2015-03-25 | 航天特种材料及工艺技术研究所 | Method for preparing oxidation resistant coating of porous carbon material |
| CN104926341A (en) * | 2015-05-22 | 2015-09-23 | 中国人民解放军国防科学技术大学 | Interface-phase-including alumina fibrous fabric reinforced SiOC (silicon oxycarbide) ceramic and preparation method thereof |
| CN105503229A (en) * | 2015-12-30 | 2016-04-20 | 西北工业大学 | Preparation method of Al2O3f/SiOC radar wave-absorbing composite material |
-
2016
- 2016-08-09 CN CN201610648722.7A patent/CN106190023B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103923601A (en) * | 2013-12-20 | 2014-07-16 | 西北工业大学 | Preparation method of structure/microwave absorbing integrated composite material |
| CN104446656A (en) * | 2014-12-15 | 2015-03-25 | 航天特种材料及工艺技术研究所 | Method for preparing oxidation resistant coating of porous carbon material |
| CN104926341A (en) * | 2015-05-22 | 2015-09-23 | 中国人民解放军国防科学技术大学 | Interface-phase-including alumina fibrous fabric reinforced SiOC (silicon oxycarbide) ceramic and preparation method thereof |
| CN105503229A (en) * | 2015-12-30 | 2016-04-20 | 西北工业大学 | Preparation method of Al2O3f/SiOC radar wave-absorbing composite material |
Non-Patent Citations (1)
| Title |
|---|
| YI-MIN SHI 等: "Effects of thermal oxidation on microwave-absorbing and mechanical properties of SiCf/SiC composites with PyC interphase", 《TRANS. NONFERROUS MET. SOC. CHINA》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106631080A (en) * | 2017-01-25 | 2017-05-10 | 厦门大学 | Manufacturing method of Si-O-C ceramic flexible substrate |
| CN106631080B (en) * | 2017-01-25 | 2019-04-16 | 厦门大学 | A kind of preparation method of Si-O-C ceramics flexible base board |
| CN110325756A (en) * | 2017-03-16 | 2019-10-11 | 舍弗勒技术股份两合公司 | Wet friction material with the increased pressures cycle service life |
| CN108638619A (en) * | 2018-03-14 | 2018-10-12 | 华南理工大学 | Impact-resistant electromagnetic shielding laminate of one kind and the preparation method and application thereof |
| CN108638619B (en) * | 2018-03-14 | 2024-01-02 | 华南理工大学 | Impact-resistant electromagnetic shielding laminated board and preparation method and application thereof |
| CN116178042A (en) * | 2022-03-22 | 2023-05-30 | 中国科学院上海硅酸盐研究所 | Complex-phase ceramic material for electromagnetic shielding and preparation method thereof |
| CN116178042B (en) * | 2022-03-22 | 2023-12-08 | 中国科学院上海硅酸盐研究所 | Complex-phase ceramic material for electromagnetic shielding and preparation method thereof |
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Effective date of registration: 20221116 Address after: 215021 Room 304, Building 2, Northwest District, Nanotown, No. 99, Jinjihu Avenue, Suzhou Industrial Park, Suzhou, Jiangsu Province Patentee after: Moog materials (Suzhou) Co.,Ltd. Address before: 710055 No. 13, Yanta Road, Shaanxi, Xi'an Patentee before: XIAN University OF ARCHITECTURE AND TECHNOLOG |
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