CN108467571A - A kind of wide dispensing of conductive composite material and preparation method of resistivity - Google Patents
A kind of wide dispensing of conductive composite material and preparation method of resistivity Download PDFInfo
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- CN108467571A CN108467571A CN201810209950.3A CN201810209950A CN108467571A CN 108467571 A CN108467571 A CN 108467571A CN 201810209950 A CN201810209950 A CN 201810209950A CN 108467571 A CN108467571 A CN 108467571A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/004—Additives being defined by their length
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Abstract
The invention discloses a kind of wide dispensing of conductive composite material and preparation methods of resistivity.The material is combined by chopped carbon fiber, short glass fiber and thermosetting resin matrix three, and the volume resistivity of the material is 0.1 10000 Ω cm.The preparation method of the material is：By the ratio for being pre-adjusted chopped carbon fiber and short glass fiber, the content of resin matrix realizes the wide distribution of composite material volume resistivity in the length and composite material of chopped carbon fiber, the proportioning for specifically including fiber weighs, the dispersion of fiber with mix, assorted fibre and thermosetting resin composite molding step.The method of the present invention is especially suitable for of large quantities, the production of the more complex conductive composite article of planform, and the material provided can be widely used for preparing electromagnetic shielding material, absorbing material, thermo electric material, body electromagnetic radiation material etc..
Description
Technical field
The present invention relates to functional composite material field, the wide dispensing of conductive composite material of especially a kind of resistivity and its preparation
Method.Its wide, high-strength light, heat-and corrosion-resistant, easily molded with volume resistivity distribution, it is excellent that processing performance is good etc.
Point.It can be used for electromagnetic shielding material, absorbing material, thermo electric material, body electromagnetic radiation etc..
Background technology
The volume resistivity of general conductive material is fixed, and will not be changed within a large range.Such as metal material
Material, conducting polymer composite, carbon material and semi-conducting material etc..And there are clearly disadvantageous, examples for general conductive material
If metal material is not corrosion-resistant, density is larger；Conducting polymer composite mechanical property is poor；Carbon material has excellent electric conductivity
Can, but its various aspects of performance is larger by the morphology influence of material；The electric conductivity of semi-conducting material influenced by impurity content it is very big,
Also very big by the influence of external condition (such as heat, light etc.) simultaneously.It is in the present invention that short glass fiber is advance with chopped carbon fiber
After dispersion mixing, then it is compound with thermosetting resin, by adjusting the content of chopped carbon fiber in system, the length of chopped carbon fiber
And the parameters such as content of resin matrix, easily and flexibly the volume resistivity of material can be regulated and controled.Composite material
Volume resistivity can be distributed in the range of 0.1-10000 Ω cm, this is that general homogenous material is irrealizable.
Glass fibre is a kind of inorganic non-metallic material haveing excellent performance, its advantage is that good insulating, heat resistance are strong, machinery
Intensity is high, corrosion resistance is good.Currently, glass fibre is usually answered in the form of continuous fiber yarn and fabric etc. as reinforcing material
For in composite material, and the use of short glass fiber is then less.Carbon fiber be it is a kind of by organic fiber through carbonization and graphite
Microcrystalline graphite material obtained from change processing, phosphorus content reach 90% or more.Carbon fiber has high intensity, high-modulus, low close
The characteristics such as degree, therefore it is often applied to dual-use industry as high strength structure material.
Carbon fiber has good electric conductivity, is often applied in various functions composite material as functional stuffing.At present
Carbon fiber is directly blended with high molecular material or inorganic non-metallic material prepare functional composite material embodiment it is very much, will be short
The embodiment that glass fibre and chopped carbon fiber are used in functional composite material after mixing as filler is cut to have not been reported.
Chopped carbon fiber has excellent electric conductivity, and theoretically a small amount of additive amount can reach good effect.But it is chopped carbon
Fiber, which is added directly into high molecular material or inorganic non-metallic material, is but difficult to realize theoretic effect.Since carbon fiber is given birth to
Gumming step during production and reuniting effect, therefore chopped carbon fiber is still to occur with fibre bundle in the base.Be chopped carbon
Fiber cannot be completely dispersed in the base, mutually cannot overlap to form conductive network, therefore be extremely difficult to expected effect.And
After short glass fiber and the advance dispersion mixing of chopped carbon fiber, chopped carbon fiber will be formed in short glass fiber and be led
Electric network, short glass fiber then play support and firm effect to conductive network.By scattered assorted fibre again with thermosetting
Property resin is prepared by mixing into composite material.Carbon fiber content in control system, carbon fiber length, the parameters such as resin matrix content,
It can be achieved with the wide distribution of volume resistivity.The use of chopped carbon fiber and short glass fiber realizes the light of composite material
Matter is high-strength.And the use of thermosetting resin considerably increases the heat-resisting and corrosion resistance of system while proof strength.Together
When assorted fibre mixed with resin matrix after form a kind of easily molded premix, have good processing performance.
Invention content
The technical problem to be solved by the present invention is to：A kind of wide dispensing of conductive composite material of resistivity and its preparation side are provided
Method.The composite material provided has the characteristics that high-strength light and 0.1-10000 Ω cm volume resistivities；What is provided answers
The preparation method of condensation material can easily and flexibly regulate and control the volume resistivity of material.
The present invention solves its technical problem and uses following technical scheme：
The wide dispensing of conductive composite material of resistivity provided by the invention is by chopped carbon fiber, short glass fiber and heat
Thermosetting resin matrix three is combined, and the volume resistivity of the material is 0.1-10000 Ω cm.
Chopped carbon fiber length used is 1-20mm, and short glass fiber length is 1-20mm；Chopped carbon fiber be chopped
The mass ratio of glass fibre is 1:99-1:1.
By forming assorted fibre after chopped carbon fiber and short glass fiber dispersion mixing, with thermosetting resin matrix
Mass ratio is 1:9-9:1.
The thermosetting resin used can be epoxy resin, unsaturated polyester resin, vinyl ester resin, phenolic resin,
One kind in polyurethane resin, cyanate ester resin, bimaleimide resin, polyimide resin, benzoxazine colophony, or it is more
Kind.
The preparation method of the wide dispensing of conductive composite material of resistivity provided by the invention, is by being pre-adjusted chopped carbon fiber
Dimension and the ratio of short glass fiber, the content of resin matrix is compound to realize in the length and composite material of chopped carbon fiber
The wide distribution of material volume resistivity, specifically includes following steps：
Step 1: the proportioning of fiber weighs：
Dry chopped carbon fiber, short glass fiber are weighed, the two mass ratio is 1:99-1:1, the two length is respectively
1-20mm、1-20mm；
Step 2: the dispersion of fiber with mix：
Chopped strand is dispersed into monofilament state in a dispersion medium, first disperses short glass fiber 1-40min, is blended into
Chopped carbon fiber disperses 1-20min, obtains assorted fibre；Specific jitter time is needed according to corresponding dispersion condition, that is, fiber
Length, fiber consumption, dispersing apparatus determine that if, using the resin of liquid as decentralized medium, the resin fibre after dispersion is mixed
It closes object and can be directly used for next step；If using solvent as decentralized medium, need to remove corresponding solvent in assorted fibre
Carry out next step again afterwards；
Step 3: assorted fibre and thermosetting resin composite molding：
By assorted fibre and thermosetting resin matrix with mass ratio for 1:9-9:1 is mixed, by composite material at
Type technique prepares conducing composite material.
In above method step 2, using beater, planetary mixer, non-intervention type material homogenizer or ultrasonic disperse
Instrument disperses chopped strand in a dispersion medium.
In above method step 2, resin be epoxy resin, unsaturated polyester resin, vinyl ester resin, phenolic resin,
One kind or more in polyurethane resin, cyanate ester resin, bimaleimide resin, polyimide resin, benzoxazine colophony
Kind；Solvent be water, toluene, ethyl alcohol, acetone it is one or more.
In above method step 3, moulding process may include compression molding, flexible bag moulding, vacuum importing molding or hot pressing
Jug forming.
The wide dispensing of conductive composite material of resistivity prepared by the method for the present invention, volume resistivity are 0.1-10000 Ω
Cm is used to prepare electromagnetic shielding material, absorbing material, thermo electric material or body electromagnetic radiation material.
Compared with prior art, the present invention having the advantages that following main：
1. in the present invention, chopped carbon fiber and short glass fiber are mixed use, the big insulating properties glass of dosage in material
Glass fiber can the conductive carbon fibers small to dosage play dilution and fixed function.It is fine by adjusting staple glass in assorted fibre
The ratio of peacekeeping chopped carbon fiber, the content of resin matrix is conductive multiple to realize in chopped carbon fiber length and composite material
The wide distribution of composite volume resistivity and adjustability.Three factors can each generate the volume resistivity of composite material
Larger impact controls these three factors, can be achieved with the wide distribution of composite material volume resistivity.It is this conductive multiple through overregulating
The volume resistivity of condensation material can be distributed in the range of 0.1-10000 Ω cm.Volume resistivity becomes in 5 orders of magnitude
Change, this is that other homogenous materials are difficult to accomplish.
2. in the present invention, a small amount of chopped carbon fiber is dispersed in assorted fibre system, conductive network is formed, material is made
Expect conductive.And the higher short glass fiber of content then plays support and firm work in system to conductive network
With.Since carbon fiber, glass fibre, resin matrix all have the characteristics that low-density, this conduction in the present invention is compound
Material has the characteristics that high-strength light.Its density is less than 1.8g/cm after tested3。
3. in the present invention, the basis material using thermosetting resin as composite material, therefore this material has very well
Heat resistance and corrosion resistance, materials'use temperature can reach 100 DEG C or more.Simultaneously for different heat conditions and resistance to
The thermosetting resin of the heat-resisting rank of difference or corrosion-resistant rank can be selected as basis material in etching condition.
4. form a kind of premix after assorted fibre is mixed with resin matrix in the present invention, can be used for a variety of composite materials at
Type technique can prepare composite product with complex shape, have good processing performance.
5. in the present invention, since chopped carbon fiber dosage is few, short glass fiber dosage is more, and the price of glass fibre
Far below the price of carbon fiber, so while ensureing materials conductive performance, the cost of material is reduced.
Description of the drawings
Fig. 1 is rod-shaped conductive composite material structure schematic diagram.
Fig. 2 is the sectional view of Fig. 1.
Specific implementation mode
With reference to specific embodiment, the present invention is described in further detail, but is not limited to these embodiments.
Embodiment 1
Chopped strand to be used will be needed in experiment, and drying to constant weight, weighs the short glass fiber that 170g length is 6mm,
Weigh the chopped carbon fiber that 30g length is 6mm.Suitable water is added into beater, starts equipment, by load weighted chopped glass
Glass fiber is added thereto, cycle dispersion 15min.Load weighted chopped carbon fiber is added after 15min, continues to disperse 7min, dispersion
After the completion, beater is closed.The mixture of water and assorted fibre is transferred in pumping and filtering device, most of water is leached out.Will
To assorted fibre be torn into strip by hand, be put into and be dried to weight in 120 DEG C of baking ovens and no longer change.Weigh 116.5g vinyl esters
2.33g methyl ethyl ketone peroxides (initiator) and 1.17g cobalt naphthenates (accelerating agent) is added in resin thereto, and keeps its mixing equal
It is even；The assorted fibre 40g prepared before is added into resin compound again, resin compound is made to be uniformly mixed with fiber is mixed in.
Fiber and resin compound are inserted in preprepared mold, so that mold is molded completely with press.Mold is fastened with bolt,
Then mold is transferred to two hours of 120 DEG C of curing ovens.Prepared composite sample is obtained after demoulding.Measure its body
Product resistivity is 0.21 Ω cm.
Embodiment 2
Chopped strand to be used will be needed in experiment, and drying to constant weight, weighs the short glass fiber that 180g length is 6mm,
Weigh the chopped carbon fiber that 20g length is 6mm.Suitable water is added into beater, starts equipment, by load weighted chopped glass
Glass fiber is added thereto, cycle dispersion 15min.Load weighted chopped carbon fiber is added after 15min, continues to disperse 7min, dispersion
After the completion, beater is closed.The mixture of water and assorted fibre is transferred in pumping and filtering device, most of water is leached out.Will
To assorted fibre be torn into strip by hand, be put into and be dried to weight in 120 DEG C of baking ovens and no longer change.Weigh 116.5g vinyl esters
2.33g methyl ethyl ketone peroxides (initiator) and 1.17g cobalt naphthenates (accelerating agent) is added in resin thereto, and keeps its mixing equal
It is even；The assorted fibre 40g prepared before is added into resin compound again, further mixes, keeps fiber and resin matrix abundant
Infiltration.Fiber and resin compound are inserted in preprepared mold, so that mold is molded completely with press.It is fastened with bolt
Then mold is transferred to two hours of 120 DEG C of curing ovens by mold.Prepared composite sample is obtained after demoulding.It surveys
It is 0.92 Ω cm to obtain its volume resistivity.
Embodiment 3
Chopped strand to be used will be needed in experiment, and drying to constant weight, weighs the short glass fiber that 188g length is 6mm,
Weigh the chopped carbon fiber that 12g length is 6mm.Suitable water is added into beater, starts equipment, by load weighted chopped glass
Glass fiber is added thereto, cycle dispersion 15min.Load weighted chopped carbon fiber is added after 15min, continues to disperse 7min, dispersion
After the completion, beater is closed.The mixture of water and assorted fibre is transferred in pumping and filtering device, most of water is leached out.Will
To assorted fibre be torn into strip by hand, be put into and be dried to weight in 120 DEG C of baking ovens and no longer change.Weigh 116.5g vinyl esters
2.33g methyl ethyl ketone peroxides (initiator) and 1.17g cobalt naphthenates (accelerating agent) is added in resin thereto, and keeps its mixing equal
It is even；The assorted fibre 40g prepared before is added into resin compound again, further mixes, keeps fiber and resin matrix abundant
Infiltration.Fiber and resin compound are inserted in preprepared mold, so that mold is molded completely with press.It is fastened with bolt
Then mold is transferred to two hours of 120 DEG C of curing ovens by mold.Prepared composite sample is obtained after demoulding.It surveys
It is 2.98 Ω cm to obtain its volume resistivity.
Embodiment 4
Chopped strand to be used will be needed in experiment, and drying to constant weight, and it is fine to weigh the staple glass that 195.6g length is 6mm
Dimension weighs the chopped carbon fiber that 4.4g length is 6mm.Suitable water is added into beater, starts equipment, it will be load weighted short
It cuts glass fibre to be added thereto, cycle dispersion 15min.Load weighted chopped carbon fiber is added after 15min, continues to disperse 7min,
After the completion of dispersion, beater is closed.The mixture of water and assorted fibre is transferred in pumping and filtering device, most of water is leached out.
Obtained assorted fibre is torn into strip by hand, is put into and is dried to weight in 120 DEG C of baking ovens and no longer changes.Weigh 116.5g ethylene
2.33g methyl ethyl ketone peroxides (initiator) and 1.17g cobalt naphthenates (accelerating agent) is added in base ester resin thereto, and keeps it mixed
It closes uniform；The assorted fibre 40g prepared before is added into resin compound again, further mixes, makes fiber and resin matrix
Fully infiltration.Fiber and resin compound are inserted in preprepared mold, so that mold is molded completely with press.Use bolt
Mold is fastened, mold is then transferred to two hours of 120 DEG C of curing ovens.Prepared composite material examination is obtained after demoulding
Sample.It is 70.7 Ω cm to measure its volume resistivity.
Embodiment 5
Chopped strand to be used will be needed in experiment, and drying to constant weight, and it is fine to weigh the staple glass that 195.6g length is 6mm
Dimension weighs the chopped carbon fiber that 4.4g length is 6mm.Suitable water is added into beater, starts equipment, it will be load weighted short
It cuts glass fibre to be added thereto, cycle dispersion 15min.Load weighted chopped carbon fiber is added after 15min, continues to disperse 7min,
After the completion of dispersion, beater is closed.The mixture of water and assorted fibre is transferred in pumping and filtering device, most of water is leached out.
Obtained assorted fibre is torn into strip by hand, is put into and is dried to weight in 120 DEG C of baking ovens and no longer changes.Weigh 116.5g ethylene
2.33g methyl ethyl ketone peroxides (initiator) and 1.17g cobalt naphthenates (accelerating agent) is added in base ester resin thereto, and keeps it mixed
It closes uniform；The assorted fibre 24g prepared before is added into resin compound again, further mixes, makes fiber and resin matrix
Fully infiltration.Fiber and resin compound are inserted in preprepared mold, so that mold is molded completely with press.Use bolt
Mold is fastened, mold is then transferred to two hours of 120 DEG C of curing ovens.Prepared composite material examination is obtained after demoulding
Sample.It is 692.7 Ω cm to measure its volume resistivity.
Embodiment 6
Chopped strand to be used will be needed in experiment, and drying to constant weight, and it is fine to weigh the staple glass that 195.6g length is 6mm
Dimension weighs the chopped carbon fiber that 4.4g length is 6mm.Suitable water is added into beater, starts equipment, it will be load weighted short
It cuts glass fibre to be added thereto, cycle dispersion 15min.Load weighted chopped carbon fiber is added after 15min, continues to disperse 7min,
After the completion of dispersion, beater is closed.The mixture of water and assorted fibre is transferred in pumping and filtering device, most of water is leached out.
Obtained assorted fibre is torn into strip by hand, is put into and is dried to weight in 120 DEG C of baking ovens and no longer changes.Weigh 116.5g ethylene
2.33g methyl ethyl ketone peroxides (initiator) and 1.17g cobalt naphthenates (accelerating agent) is added in base ester resin thereto, and keeps it mixed
It closes uniform；The assorted fibre 20g prepared before is added into resin compound again, further mixes, makes fiber and resin matrix
Fully infiltration.Fiber and resin compound are inserted in preprepared mold, so that mold is molded completely with press.Use bolt
Mold is fastened, mold is then transferred to two hours of 120 DEG C of curing ovens.Prepared composite material examination is obtained after demoulding
Sample.It is 5241.8 Ω cm to measure its volume resistivity.
Embodiment 7
Chopped strand to be used will be needed in experiment, and drying to constant weight, and it is fine to weigh the staple glass that 195.6g length is 6mm
Dimension weighs the chopped carbon fiber that 4.4g length is 6mm.Suitable water is added into beater, starts equipment, it will be load weighted short
It cuts glass fibre to be added thereto, cycle dispersion 15min.Load weighted chopped carbon fiber is added after 15min, continues to disperse 7min,
After the completion of dispersion, beater is closed.The mixture of water and assorted fibre is transferred in pumping and filtering device, most of water is leached out.
Obtained assorted fibre is torn into strip by hand, is put into and is dried to weight in 120 DEG C of baking ovens and no longer changes.Weigh 116.5g ethylene
2.33g methyl ethyl ketone peroxides (initiator) and 1.17g cobalt naphthenates (accelerating agent) is added in base ester resin thereto, and keeps it mixed
It closes uniform；The assorted fibre 17.15g prepared before is added into resin compound again, further mixes, makes fiber and resin base
Body fully infiltrates.Fiber and resin compound are inserted in preprepared mold, so that mold is molded completely with press.Use spiral shell
Bolt fastens mold, and mold is then transferred to two hours of 120 DEG C of curing ovens.Prepared composite material examination is obtained after demoulding
Sample.It is 9567.2 Ω cm to measure its volume resistivity.
Embodiment 8
Chopped strand to be used will be needed in experiment, and drying to constant weight, weighs the short glass fiber that 188g length is 6mm,
Weigh the chopped carbon fiber that 12g length is 6mm.Suitable water is added into beater, starts equipment, by load weighted chopped glass
Glass fiber is added thereto, cycle dispersion 15min.Load weighted chopped carbon fiber is added after 15min, continues to disperse 7min, dispersion
After the completion, beater is closed.The mixture of water and assorted fibre is transferred in pumping and filtering device, most of water is leached out.Will
To assorted fibre be torn into strip by hand, be put into and be dried to weight in 120 DEG C of baking ovens and no longer change.Weigh 56g epoxy resin (boards
Number AG-80), 64g methyl tetrahydro phthalic anhydrides (curing agent) are added thereto, and it is made to be uniformly mixed；Add again into resin compound
Enter the assorted fibre 40g prepared before, further mixes, fiber and resin matrix is made fully to infiltrate.Fiber and resin are mixed
Object is inserted in preprepared mold, so that mold is molded completely with press.Mold is fastened with bolt, is then transferred to mold
In baking oven, cured using the curing cycle of 80 DEG C 2h+120 DEG C 2h+160 DEG C of 2h.Prepared composite material examination is obtained after demoulding
Sample.It is 2.87 Ω cm to measure its volume resistivity.
Embodiment 9
Chopped strand to be used will be needed in experiment, and drying to constant weight, weighs the short glass fiber that 188g length is 6mm,
Weigh the chopped carbon fiber that 12g length is 6mm.Suitable water is added into beater, starts equipment, by load weighted chopped glass
Glass fiber is added thereto, cycle dispersion 15min.Load weighted chopped carbon fiber is added after 15min, continues to disperse 7min, dispersion
After the completion, beater is closed.The mixture of water and assorted fibre is transferred in pumping and filtering device, most of water is leached out.Will
To assorted fibre be torn into strip by hand, be put into and be dried to weight in 120 DEG C of baking ovens and no longer change.Weigh 120g bisphenol E-type cyanogen
0.012g dibutyl tin laurates (catalyst) are added in acid esters thereto, and it is made to be uniformly mixed；Again into resin compound
The assorted fibre 40g prepared before is added, further mixes, fiber and resin matrix is made fully to infiltrate.Fiber and resin are mixed
It closes object to insert in preprepared mold, so that mold is molded completely with press.Mold is fastened with bolt, then shifts mold
To curing 6h in 170 DEG C of baking ovens.Prepared composite sample is obtained after demoulding.It is 2.93 Ω to measure its volume resistivity
cm。
A kind of conducing composite material of the wide distribution of volume resistivity can be prepared using technical solution provided by the invention.It has
Have the advantages that volume resistivity can the adjusting, high-strength light, heat-and corrosion-resistant, easily molded in a wide range of.It can be used for preparing electromagnetism
Shielding material, absorbing material, thermo electric material, body electromagnetic radiation material etc..
In above-described embodiment, prepared rod-shaped conducing composite material sample structure schematic diagram such as Fig. 1, shown in Fig. 2.1 in figure
It is insulation inner core for pre-buried electrode, 2,3 be conducing composite material.Pre-buried electrode is fixed in advance on insulation inner core, is then passed through
Die press technology for forming prepares conducing composite material in insulation inner core outer layer, obtains rod-shaped conducing composite material.
The foregoing is merely the preferred embodiments of the present invention, are not intended to restrict the invention, for the technology of this field
For personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is done any repaiies
Change, equivalent replacement, improvement etc., within protection scope of the present invention.
1 section Example formula of table and volume resistivity test result
Claims (9)
1. a kind of wide dispensing of conductive composite material of resistivity, it is characterized in that the material by chopped carbon fiber, short glass fiber with
Thermosetting resin matrix three is combined, and the volume resistivity of the material is 0.1-10000 Ω cm.
2. the wide dispensing of conductive composite material of resistivity according to claim 1, which is characterized in that chopped carbon fiber used is long
Degree is 1-20mm, and short glass fiber length is 1-20mm；The mass ratio of chopped carbon fiber and short glass fiber is 1:99-1:
1。
3. the wide dispensing of conductive composite material of resistivity according to claim 1, which is characterized in that by chopped carbon fiber with it is short
Assorted fibre is formed after cutting glass fibre dispersion mixing, the mass ratio with thermosetting resin matrix is 1:9-9:1.
4. the wide dispensing of conductive composite material of resistivity according to claim 3, which is characterized in that the thermosetting resin used
Come for epoxy resin, unsaturated polyester resin, vinyl ester resin, phenolic resin, polyurethane resin, cyanate ester resin, span
It is one or more in imide resin, polyimide resin, benzoxazine colophony.
5. a kind of preparation method of the wide dispensing of conductive composite material of resistivity, it is characterized in that by be pre-adjusted chopped carbon fiber with
The ratio of short glass fiber, the content of resin matrix realizes composite material in the length and composite material of chopped carbon fiber
The wide distribution of volume resistivity, specifically includes following steps：
Step 1: the proportioning of fiber weighs：
Dry chopped carbon fiber, short glass fiber are weighed, the two mass ratio is 1:99-1:1, the two length is respectively 1-
20mm、1-20mm；
Step 2: the dispersion of fiber with mix：
Chopped strand is dispersed into monofilament state in a dispersion medium, first disperses short glass fiber 1-40min, is blended into chopped
Carbon fiber disperses 1-20min, obtains assorted fibre；Specific jitter time needs long according to corresponding dispersion condition, that is, fiber
Degree, fiber consumption, dispersing apparatus determine, if using the resin of liquid as decentralized medium, the resin fibre mixing after dispersion
Object can be directly used for next step；If using solvent as decentralized medium, need to remove in assorted fibre after corresponding solvent
Next step is carried out again；
Step 3: assorted fibre and thermosetting resin composite molding：
By assorted fibre and thermosetting resin matrix with mass ratio for 1:9-9:1 is mixed, and composite molding work is passed through
Skill prepares conducing composite material.
6. the preparation method of the wide dispensing of conductive composite material of resistivity according to claim 5, it is characterised in that step 2
In, using beater, planetary mixer, non-intervention type material homogenizer or ultrasonic disperse instrument, by chopped strand in decentralized medium
In disperseed.
7. the preparation method of the wide dispensing of conductive composite material of resistivity according to claim 5, it is characterised in that step 2
In, resin be epoxy resin, unsaturated polyester resin, vinyl ester resin, phenolic resin, polyurethane resin, cyanate ester resin,
It is one or more in bimaleimide resin, polyimide resin, benzoxazine colophony；Solvent be water, toluene, ethyl alcohol,
It is one or more in acetone.
8. the preparation method of the wide dispensing of conductive composite material of resistivity according to claim 5, it is characterised in that step 3
In, moulding process includes compression molding, flexible bag moulding, vacuum importing molding or autoclave molding.
9. the wide dispensing of conductive composite material of resistivity that in claim 7 to 8 prepared by any the method, it is characterized in that the material
Volume resistivity be 0.1-10000 Ω cm, be used to prepare electromagnetic shielding material, absorbing material, thermo electric material or electromagnetism spoke
Diffuser material.
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| CN201810209950.3A CN108467571B (en) | 2018-03-14 | 2018-03-14 | Conductive composite material with wide resistivity distribution and preparation method thereof |
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| CN201810209950.3A CN108467571B (en) | 2018-03-14 | 2018-03-14 | Conductive composite material with wide resistivity distribution and preparation method thereof |
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| CN108467571B CN108467571B (en) | 2021-01-05 |
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| CN114055866A (en) * | 2021-11-23 | 2022-02-18 | 航天特种材料及工艺技术研究所 | High-temperature resin-based structural wave-absorbing composite material and preparation method thereof |
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