CN1314725C - Novel light-wave absorbing carbon fiber composite material preparation method - Google Patents
Novel light-wave absorbing carbon fiber composite material preparation method Download PDFInfo
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- CN1314725C CN1314725C CNB200510014991XA CN200510014991A CN1314725C CN 1314725 C CN1314725 C CN 1314725C CN B200510014991X A CNB200510014991X A CN B200510014991XA CN 200510014991 A CN200510014991 A CN 200510014991A CN 1314725 C CN1314725 C CN 1314725C
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Abstract
The present invention discloses a method for preparing a composite light-wave absorbing carbon fiber material. The method of the present invention can be utilized for obtaining the composite material with low cost and excellent light-wave absorbing performance. The method comprises the following steps: a viscose base fiber is carbonized and activated to obtain activated viscose base carbon fibers; the activated carbon fibers are made into short carbon fibers of 5 to 50mm, added to bisphenol-A epoxy resin, uniformly mixed and mixed with a polyamide solidifying agent with the low molecular weight; the mass percentage of the added epoxy resin to the added solidifying agent is 2:1, and the weight percentage of the carbon fibers are 0.5 to 3% of the weight of the composite light-wave absorbing material; the materials are thoroughly stirred to be uniform before hot-pressing solidification, a heating temperature is from 70 DEG C to 100 DEG C, and pressure is from 8MPa to 12MPa.
Description
Technical field
The present invention relates to a kind of preparation method of novel wave-absorbing material, belong to the technology of preparing of absorbing material.
Background technology
Carbon fiber is one of absorbing material fiber commonly used.Have bibliographical information both at home and abroad, common carbon fibers has stronger reflectivity to hertzian wave, and its reflection loss effect is similar to aluminium alloy.For improving the absorbing property of carbon fiber, generally the method for Cai Yonging is carbon fiber to be carried out modification handle, the extraordinary ripple carbon fiber of inhaling of preparation, this research mainly concentrates on the carbon fiber of profiled-cross-section carbon fiber, low-firing specified range specific conductivity at present and carbon fiber is carried out on doping vario-property and the surface modification.The inventor once adopted special arrangement mode to improve the electromaganic wave absorbing property of carbon-fibre composite in the research in early stage.Though extraordinary carbon fiber has absorbing property preferably, its expensive price and complicated process technology limit its application.
Summary of the invention
The inventor finds that the viscose glue based precursor has the structure of special crosssection, the carbon fiber surface of being made by it exists darker irregular groove and significantly protruding, it is non-circular that the cross section is, and has good electromagnetic property after activated, is a kind of suction ripple carbon fiber that conveniently is easy to get.
The object of the present invention is to provide a kind of preparation method who is different from carbon fiber composite wave-suction material in the past, that technology is simple, wave-absorbing effect is good.
The present invention be with will viscose glue base fiber through the active viscose-based carbon fiber that obtains behind carbonization, the activating process with profiled-cross-section and high-specific surface area as absorption agent, with the bisphenol A type epoxy resin is that body material prepares Wave suction composite material, simple, the prepared material absorbing property of the inventive method preparation technology excellence.
The present invention is achieved through the following technical solutions:
1) with viscose glue base fiber with 10% (NH
4)
2SO
4Solution impregnation, after room temperature is dried, carbonization in 350～400 ℃, air;
2) fiber after the carbonization is put into rotary activated stove, when activation furnace reaches 10
-2The Pa rough vacuum, 900～950 ℃ the time, beginning feeds water vapour and is incubated 7-15 minute in activation furnace, take out, and obtains having the activated carbon fiber of profiled-cross-section and high-specific surface area;
3) with step 2) the gained activated carbon fiber joins in the bisphenol A type epoxy resin after making the short carbon fiber of 5-50mm, is stirred to carbon fiber and is uniformly dispersed, and adds the low molecular polyamides solidifying agent again; The Resins, epoxy that is added and the mass percent of solidifying agent are 2: 1; Stir the back hot-press solidifying, obtain Wave suction composite material, Heating temperature is 70-100 ℃, and pressure is 8-12Mpa; The weight percent of activated carbon fiber is the 0.5-3% of Wave suction composite material weight.
In order to obtain better effect, preferably with above-mentioned steps 2) the gained activated carbon fiber makes the short carbon fiber of 10-30mm.
Characteristics of the present invention are: technology is simple, and processing and manufacturing is with low cost, and wave-absorbing effect is good.On the basis of lower carbon fiber content, in the range of frequency of 2-18GHz, can obtain the effective bandwidth of 12GHz.
Description of drawings
Fig. 1 is the electron micrograph of the viscose base activated carbon fiber that adopts among the present invention.
Fig. 2 is a matrix material absorbing property test curve.
Embodiment
Further describe the present invention with embodiment below, but do not limit the present invention.
Raw materials usedly be: E-44 (6101) type Resins, epoxy, (commercially available, Wuxi City resin processing plant produces) 203# type low molecular polyamides, (commercially available, chemical plant, Yan'an, Tianjin produces)
Example 1.
Get 100 gram viscose glue base fibers, with 2000 milliliter 10% (NH
4)
2SO
4Solution impregnation, room temperature dry in the air in after, carbonization in 350～400 ℃, air; Fiber after this carbonization is put into rotary activated stove, 10
-2The Pa rough vacuum, 900～950 ℃ the time, in activation furnace, feed water vapour and be incubated 10 minutes, take out carbon fiber, promptly obtain having the activated carbon fiber of profiled-cross-section and high specific surface area, the gained activated carbon fiber is made the length of 20mm, standby.
Take by weighing E-44 (6101) type Resins, epoxy 100g, active short carbon fiber 1.1g mixes the back and fully stirs.Taking by weighing low molecular polyamides 50g, join in the aforementioned mixture, fully stir once more until mixing, serves as the suction ripple layer of inhaling in the ripple plate with this mixture.An amount of mixture is poured in the mould, made mixture can evenly cover mold bottom and each corner, the glasscloth that tiles thereon, and the mixed thing of glasscloth is fully soaked into.Remaining mixture all to going in the mould and leveling, is repaved and covers a glasscloth.Other takes by weighing 30g Resins, epoxy, the 15g polyamide curing agent places in the container, after both are fully mixed, all falls on the glasscloth of upper strata, sprawls evenly.The mould that cast is finished is put on the thermocompressor Stage microscope, adds the pressure of 10MPa.The thermocompressor system temperature is transferred to 80 ℃, solidified three hours, get final product delivery.Obtain 180mm * 180mm, thickness is the square plate tensile sample of 4mm.The attenuation by absorption curve of this sample is seen accompanying drawing 2.
Embodiment 2.
The matrix material of preparation carbon fiber content distribution gradient, the form of laminated pouring is adopted in the preparation of wherein inhaling the ripple layer, and the carbon fiber content of each layer successively decreases successively.Adopt the method identical, with short carbon fiber and Resins, epoxy, solidifying agent thorough mixing with embodiment 1.Adopt four-layer structure, the short carbon fiber content of each layer is respectively 1%, 0.75%, and 0.5% and 0.25%.Laminated pouring in mould, at 10MPa, 80 ℃ solidified about three hours, and the demoulding can obtain the gradient Wave suction composite material.
Embodiment 3.
Take by weighing E-44 type Resins, epoxy 200g, mix the back with the active short carbon fiber of 3g and fully stir.Take by weighing low molecular polyamides 100g, join in the original mixture, fully stirring mixes until resin, solidifying agent and carbon suede once more.This mixture is put into suitable mold, impose the pressure about 10MPa, and solidified about three hours at 80 ℃, the demoulding can obtain Wave suction composite material.
Claims (2)
1, a kind of preparation method of novel light-wave absorbing carbon fiber composite material is characterized in that:
1) with viscose glue base fiber with 10% (NH
4)
2SO
4Solution impregnation, after room temperature is dried, carbonization in 350～400 ℃, air;
2) fiber after the carbonization is put into rotary activated stove, when activation furnace reaches 10
2The Pa rough vacuum, in the time of 900～950 ℃, beginning feeds water vapour and is incubated 7-15 minute in activation furnace, take out, and obtains having the activated carbon fiber of profiled-cross-section and high-specific surface area;
3) with step 2) the gained activated carbon fiber joins in the bisphenol A type epoxy resin after making the short carbon fiber of 5-50mm, being stirred to carbon fiber is uniformly dispersed, add the low molecular polyamides solidifying agent again, the Resins, epoxy that is added and the mass percent of solidifying agent are 2: 1; Stir the back hot-press solidifying, obtain Wave suction composite material, Heating temperature is 70-100 ℃, and pressure is 8-12Mpa; The weight percent of activated carbon fiber is the 0.5-3% of Wave suction composite material weight.
2, the preparation method of wave absorbing carbon fiber composite material according to claim 1 is characterized in that activated carbon fiber is made the short carbon fiber of 10-30mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510014991XA CN1314725C (en) | 2005-09-05 | 2005-09-05 | Novel light-wave absorbing carbon fiber composite material preparation method |
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|---|---|---|---|
| CNB200510014991XA CN1314725C (en) | 2005-09-05 | 2005-09-05 | Novel light-wave absorbing carbon fiber composite material preparation method |
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| CN1730555A CN1730555A (en) | 2006-02-08 |
| CN1314725C true CN1314725C (en) | 2007-05-09 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519487B (en) * | 2009-03-18 | 2011-11-30 | 南京南大波平电子信息有限公司 | Foamed high resilience polyurethane wave-absorbing material and preparation method thereof |
| CN102741465A (en) * | 2010-02-02 | 2012-10-17 | 应用纳米结构方案公司 | Carbon nanotube-infused fiber materials containing parallel-aligned carbon nanotubes, methods for production thereof, and composite materials derived therefrom |
| US9017854B2 (en) | 2010-08-30 | 2015-04-28 | Applied Nanostructured Solutions, Llc | Structural energy storage assemblies and methods for production thereof |
| CN102179968B (en) * | 2011-03-04 | 2014-03-05 | 中国人民解放军国防科学技术大学 | Radar and infrared compatible stealthy material and preparation method thereof |
| CN102211938B (en) * | 2011-03-07 | 2013-03-20 | 中国人民解放军国防科学技术大学 | Microwave absorbing ceramic of silicon carbide compound material and preparation method thereof |
| CN102218868B (en) * | 2011-04-07 | 2013-06-19 | 中国人民解放军国防科学技术大学 | Wave-absorbing material for silicon carbide fibre reinforced resin base sandwich structure and preparation method thereof |
| CN102218867B (en) * | 2011-04-07 | 2013-06-19 | 中国人民解放军国防科学技术大学 | Wave-absorbing material for assorted fibre reinforced resin base sandwich structure and preparation method thereof |
| CN102229267B (en) * | 2011-04-07 | 2013-06-19 | 中国人民解放军国防科学技术大学 | Hybrid fiber reinforced resin matrix sandwich structural absorbing material and its preparation method |
| CN102316711B (en) * | 2011-06-22 | 2014-04-02 | 东华大学 | Wave-absorbing stealthy material with active carbon-fiber felt screen (ACFFS) structure and preparation method thereof |
| CN102529123B (en) * | 2011-11-25 | 2014-08-06 | 南昌大学 | Sheet molding compound (SMC) process preparation method of electromagnetic wave absorbing composite material |
| CN103566885B (en) * | 2013-11-05 | 2015-07-01 | 四川创越炭材料有限公司 | Activated carbon fiber ball and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5611242A (en) * | 1979-07-11 | 1981-02-04 | Toray Industries | Carbon fiber reinforcing resin composite material |
| JPS5637153A (en) * | 1979-09-04 | 1981-04-10 | Toray Industries | Carbon fiber reinforcing resin composite material |
| JPS60199023A (en) * | 1984-03-22 | 1985-10-08 | Agency Of Ind Science & Technol | Epoxy resin composition for carbon fiber reinforcement |
| JPH04239536A (en) * | 1991-01-24 | 1992-08-27 | Asahi Chem Ind Co Ltd | Resin composition for carbon fiber reinforced composite material |
| CN1316555A (en) * | 2000-02-02 | 2001-10-10 | 中国人民解放军国防科学技术大学 | Process for preparing high-strength viscose carbon fibres |
| CN1597774A (en) * | 2004-08-12 | 2005-03-23 | 上海交通大学 | Preparation process for composite of rare earth modified carbon-fibre / epoxy resin |
-
2005
- 2005-09-05 CN CNB200510014991XA patent/CN1314725C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5611242A (en) * | 1979-07-11 | 1981-02-04 | Toray Industries | Carbon fiber reinforcing resin composite material |
| JPS5637153A (en) * | 1979-09-04 | 1981-04-10 | Toray Industries | Carbon fiber reinforcing resin composite material |
| JPS60199023A (en) * | 1984-03-22 | 1985-10-08 | Agency Of Ind Science & Technol | Epoxy resin composition for carbon fiber reinforcement |
| JPH04239536A (en) * | 1991-01-24 | 1992-08-27 | Asahi Chem Ind Co Ltd | Resin composition for carbon fiber reinforced composite material |
| CN1316555A (en) * | 2000-02-02 | 2001-10-10 | 中国人民解放军国防科学技术大学 | Process for preparing high-strength viscose carbon fibres |
| CN1597774A (en) * | 2004-08-12 | 2005-03-23 | 上海交通大学 | Preparation process for composite of rare earth modified carbon-fibre / epoxy resin |
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