CN107118538A - A kind of preparation method of thermoplastic elastomer (TPE)/conductive fiber composite foam material - Google Patents
A kind of preparation method of thermoplastic elastomer (TPE)/conductive fiber composite foam material Download PDFInfo
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- CN107118538A CN107118538A CN201710311117.5A CN201710311117A CN107118538A CN 107118538 A CN107118538 A CN 107118538A CN 201710311117 A CN201710311117 A CN 201710311117A CN 107118538 A CN107118538 A CN 107118538A
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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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2203/14—Applications used for foams
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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Abstract
The invention belongs to field of compound material, and in particular to a kind of preparation method of the variable thermoplastic elastomer (TPE) of electric conductivity/conductive fiber composite foam material.The preparation method comprises the following steps：By thermoplastic elastomer (TPE) and conductive fiber melt blending, the compound particle that particle diameter is 3 4mm is obtained；Compound particle is put into autoclave, CO is passed through2, make CO2Progress pressurize infiltration in a supercritical state, rapid after pressure release to be put into foaming machine, expanded particle is made in foamable；Expanded particle is subjected to steam compression molding, thermoplastic elastomer (TPE)/conductive fiber composite foam material is obtained.Prepared elastic properties of materials is big, density is small, excellent in mechanical performance, and possesses the variable function of electric conductivity, solves that conventional metals conductive material density is big, the problem such as electric conductivity is immutable.
Description
Technical field
The invention belongs to conductive material field, and in particular to a kind of variable thermoplastic elastomer (TPE)/conductive fiber of electric conductivity
The preparation method of composite foam material.
Background technology
In the past, usually using metal as conductive material, however, increasingly miniaturization and plastics zero with electronic unit
The use of part, especially in consumption-type electronic product, to updating, lighter material proposes requirement.Include conductive filler
High polymer material has unique structure and physicochemical properties, it is widely used in stealth technology, display, battery, electricity
The fields such as sub- device, biological medicine, sensor.Macromolecule conducting material is lighter than metallic conductor, has anisotropy to photoelectricity, easily
In machine-shaping, the physical property of electric conductor is varied or adjusted using external condition light, electricity, heat, pressure etc..
The content of the invention
The invention reside in a kind of preparation method of conductive energy expanded material is provided, this material has good mechanics
Performance and electric conductivity, and electric conductivity can according to pressure difference and change.
In order to reach foregoing invention purpose, the present invention uses following technical scheme：
A kind of preparation method of thermoplastic elastomer (TPE)/conductive fiber composite foam material, the preparation method includes following step
Suddenly：
(1) by thermoplastic elastomer (TPE) and conductive fiber melt blending, the compound particle that particle diameter is 3-4mm is obtained；
(2) compound particle is put into autoclave, is passed through CO2, make CO2Progress pressurize infiltration in a supercritical state,
Rapid after pressure release to be put into foaming machine, expanded particle is made in foamable；
(3) expanded particle is subjected to steam compression molding, obtains thermoplastic elastomer (TPE)/conductive fiber composite foam material.
Elastomer and conductive fiber melt blending are made conductive fiber be dispersed in elastomer by the present invention, and grain is made
Footpath is 3-4mm compound particle, and the particle foam bubble under this particle diameter evenly can effectively fill up mould in compression molding
Chamber, is conducive to follow-up compression molding；Then compound particle uses supercritical CO2Physical blowing, forms the uniform, bubble of multiplying power greatly
Hole, to provide the elasticity that expanded material is bigger；Last expanded material can be prepared variously-shaped by steam compression molding
Conductive articles.
The addition of conventional pilot conductive fillers in high polymer material, the power of material can be reduced in the electric conductivity for improving material simultaneously
Learn performance.And the conductive fiber orientation and spatial distribution that the present invention is used expand with granule foaming and changed, therefore conductive fiber exists
In the range of certain addition, the mechanical property of material can be improved.Because conductive fiber spacing is swollen with granule foaming after foaming materials
Swollen to become big, now the electric conductivity of material is smaller, when material pressed particulate is deflated, and the spacing between conductive fiber diminishes, material
Electric conductivity becomes big therewith, after pressure is removed, and elastic larger because of expanded beads, particle can quickly spring back to original state, because
This material prepared possesses the ability for changing electric conductivity with ambient pressure difference.
Preferably, the thermoplastic elastomer (TPE) is in polyurethane elastomer, polyolefin elastomer, styrenic elastomer
One or more.
Preferably, conductive fiber consumption is the 5-15% of composite gross weight in step (1).To the use of conductive fiber
Amount carries out preferably, more excellent electric conductivity being obtained under the physical and mechanical properties basis for not influenceing elastomer.Managed according to percolation threshold
By when the addition of conductive fiber in elastomer reaches percolation threshold, elastomer can be mutated by insulator conductor 801, and dielectric is normal
Number is sharply increased, so that material has higher dielectric constant near percolation threshold.Experiment shows, conductive fiber consumption
For composite gross weight 5% when, reach percolation threshold, the electric conductivity of material is sharply increased, hereafter, with conductive fiber
The increase of consumption, electric conductivity improves slow.And the overall mechanical properties of material are composite gross weight in conductive fiber consumption
Measure more excellent in the range of 5-15%.
Further preferably, conductive fiber consumption is the 8-12% of composite gross weight, and the electric conductivity of material is with leading
The increase of electric fiber usage amount and improve, but when conductive fiber consumption exceed certain limit when, the mechanical property of material is somewhat
Some reductions.Consider the electric conductivity and mechanical property of material, present invention selection conductive fiber consumption is composite gross weight
8-12%.
Preferably, the conductive fiber is stainless steel fibre, aluminum fiber, carbon nano-tube fibre, metal copper fiber, carbon black
One or more in fiber, graphene fiber.
Further preferably, the conductive fiber is metal copper fiber and carbon black fibre with mass ratio 1：It is mixed that (1-2) is constituted
Compound, mixture combines the high conduction performance of metal copper fiber and the enhancing performance of carbon black fibre.
Further preferably, metal copper fiber and carbon black fibre are with mass ratio 1：The amount of mixture of (1-2) composition is compound
The 8-10% of material gross weight.
Preferably, the pressure of reactor is 10-40Mpa in step (2), temperature is 35-55 DEG C.CO2Critical-temperature
For 31 DEG C, critical pressure 7.38MPa, the compression CO when temperature and pressure exceedes critical value2Gas is then supercritical CO2, one
As for, temperature and pressure is higher, supercritical CO2Penetrating power it is better, but the ability to bear of equipment is limited, if temperature and
Pressure is excessive, can seriously damage equipment, and then influence whole technique.
Preferably, time of penetration is 2-4h in step (2).Supercritical CO2Penetrate into elastomer is one slow
Process, pressurize time of penetration is too short, supercritical CO2Elastomer is not fully penetrated into also；Pressurize time of penetration is oversize, is unfavorable for
Energy-conservation, reduces production efficiency.
Preferably, foamable temperature is 100-150 DEG C in step (2), the foamable time is 1-10min.Foaming
Temperature depend on the characteristic of material in itself, the blowing temperature of different materials can be different.If the temperature for processing of foaming is too high,
It can then cause foaming materials excessive and burst, temperature is too low, and the multiplying power foamed is inadequate.
Expanded particle carries out concretely comprising the following steps for steam compression molding：First mould is preheated, makes the surface temperature of mould
Degree reaches the fusing point of expanded material；Thermoplastic elastomer foaming particle is squeezed into cavity body of mould by spray gun, then passes to high pressure steaming
Vapour, now closes the condensation water valve on one side, opens steam inlet valve.Meanwhile, close the steam inlet valve of opposite face, condensed water
Valve is opened, so that steam sprays from opposite direction.Under a certain pressure, each particle surface mutually melt bonded obtained system
Product.After logical steam certain time, lead to cooling water cooling, the demoulding and drying and shaping after cooling certain time.
Temperature that steam compression molding is used, pressure, time depend on the self character of material, different materials'use
Condition of molding is different.For example, for polyurethane elastomer material, the temperature of steam compression molding is 100-200 DEG C, pressure
For 0.1-0.8MPa, the dwell time is 1-5min；For polyolefin elastomer material, the temperature of steam compression molding is 160-
250 DEG C, pressure is 0.5-1.5MPa, and the dwell time is 3-8min；For styrenic elastomer material, steam compression molding
Temperature is 200-280 DEG C, and pressure is 0.8-2MPa, and the dwell time is 3-10min.
Thermoplastic elastomer (TPE)/conductive fiber composite foam material is, based on supercritical carbon dioxide infiltration, to be sent out through pure physics
Brewed standby, whole process is environment friendly and pollution-free, and prepared elastic properties of materials is big, density is small, and possesses the variable function of electric conductivity.
Because material adds conductive fiber, the mechanical property of material also improves a lot, and solves conventional metals conductive material density
Greatly, the problem such as electric conductivity is immutable, can be widely applied to biomaterial, the conductive field such as equipment and sensor.
Brief description of the drawings
Fig. 1 is conductive material compressive deformation figure.
In figure, 1 is the expanded beads before being pressurized, and 2 be conductive fiber, and 3 be the crafters of expanded beads, and 4 be expanded beads
Suffered ambient pressure, 5 be the expanded beads in pressurized process, and 6 be the expanded beads after compression resilience.
Embodiment
Explanation is further described to technical scheme below by specific embodiment and accompanying drawing.If without spy
Raw material employed in different explanation, embodiments of the invention is the method employed in raw material commonly used in the art, embodiment,
It is the conventional method of this area.
Conducing composite material compressive deformation prepared by the present invention is as shown in figure 1, conductive fiber is dispersed in expanded beads
Crafters in, when expanded beads are by ambient pressure, conductive fiber is rearranged in matrix, and conductive fiber spacing becomes
It is closer, electric conductivity increase, after pressure is removed, the fast quick-recovery reset condition of expanded beads, the spacing of conductive fiber is drawn again
Greatly, electric conductivity restPoses.
Embodiment 1
The metal copper fiber that gross weight 5% is added when TPUE is synthesized carries out batch mixing synthesis granulation,
TPU/ metallic copper fibrous composites are prepared, particle size is controlled in 3mm or so.Composite is put into overcritical titanium dioxide
In carbon infiltration kettle, be passed through carbon dioxide and pressurize, pressure is reached 13Mpa, 40 DEG C of temperature, now carbon dioxide be in overcritical
State, in this case pressurize is permeated rapid be put into after 3h, quick pressure releasing and is heated in 100 DEG C of foaming machine, and foam 5min
Obtain TPU/ metallic copper fiber composite expanded beads.Composite foamed particle is squeezed into by spray gun and is heated to 150 DEG C of cavity body of mould
It is interior, high steam is then passed to, steam pressure is 0.3MPa, now close the condensation water valve on one side, open steam inlet valve, together
When, close the steam inlet valve of opposite face, condensation water valve is opened, so that steam sprays from opposite direction.Logical steam 2min
Afterwards, lead to cooling water cooling 100s, the rear demoulding and drying and shaping, obtain composite foam material.
Embodiment 2
The metal copper fiber that gross weight 10% is added when TPUE is synthesized carries out batch mixing synthesis granulation,
TPU/ metallic copper fibrous composites are prepared, particle size is controlled in 3mm or so.Composite is put into overcritical titanium dioxide
In carbon infiltration kettle, be passed through carbon dioxide and pressurize, pressure is reached 13Mpa, 40 DEG C of temperature, now carbon dioxide be in overcritical
State, in this case pressurize is permeated rapid be put into after 3h, quick pressure releasing and is heated in 100 DEG C of foaming machine, and foam 5min
Obtain TPU/ metallic copper fiber composite expanded beads.Composite foamed particle is squeezed into by spray gun and is heated to 150 DEG C of cavity body of mould
It is interior, high steam is then passed to, steam pressure is 0.3MPa, now close the condensation water valve on one side, open steam inlet valve, together
When, close the steam inlet valve of opposite face, condensation water valve is opened, so that steam sprays from opposite direction.Logical steam 2min
Afterwards, lead to cooling water cooling 100s, the rear demoulding and drying and shaping, obtain composite foam material.
Embodiment 3
The metal copper fiber that gross weight 12% is added when TPUE is synthesized carries out batch mixing synthesis granulation,
TPU/ metallic copper fibrous composites are prepared, particle size is controlled in 3mm or so.Composite is put into overcritical titanium dioxide
In carbon infiltration kettle, be passed through carbon dioxide and pressurize, pressure is reached 13Mpa, 40 DEG C of temperature, now carbon dioxide be in overcritical
State, in this case pressurize is permeated rapid be put into after 3h, quick pressure releasing and is heated in 100 DEG C of foaming machine, and foam 5min
Obtain TPU/ metallic copper fiber composite expanded beads.Composite foamed particle is squeezed into by spray gun and is heated to 150 DEG C of cavity body of mould
It is interior, high steam is then passed to, steam pressure is 0.3MPa, now close the condensation water valve on one side, open steam inlet valve, together
When, close the steam inlet valve of opposite face, condensation water valve is opened, so that steam sprays from opposite direction.Logical steam 2min
Afterwards, lead to cooling water cooling 100s, the rear demoulding and drying and shaping, obtain composite foam material.
Embodiment 4
The metal copper fiber that gross weight 15% is added when TPUE is synthesized carries out batch mixing synthesis granulation,
TPU/ metallic copper fibrous composites are prepared, particle size is controlled in 3mm or so.Composite is put into overcritical titanium dioxide
In carbon infiltration kettle, be passed through carbon dioxide and pressurize, pressure is reached 13Mpa, 40 DEG C of temperature, now carbon dioxide be in overcritical
State, in this case pressurize is permeated rapid be put into after 3h, quick pressure releasing and is heated in 100 DEG C of foaming machine, and foam 5min
Obtain TPU/ metallic copper fiber composite expanded beads.Composite foamed particle is squeezed into by spray gun and is heated to 150 DEG C of cavity body of mould
It is interior, high steam is then passed to, steam pressure is 0.3MPa, now close the condensation water valve on one side, open steam inlet valve, together
When, close the steam inlet valve of opposite face, condensation water valve is opened, so that steam sprays from opposite direction.Logical steam 2min
Afterwards, lead to cooling water cooling 100s, the rear demoulding and drying and shaping, obtain composite foam material.
Embodiment 5
The metal copper fiber and carbon black fibre of gross weight 5% are added when TPUE is synthesized with mass ratio
1:The mixture of 1.5 compositions, carries out batch mixing synthesis granulation, prepares TPU/ conductive fiber composite materials, and particle size control exists
3mm or so.Composite is put into supercritical carbon dioxide infiltration kettle, carbon dioxide is passed through and pressurizes, reach pressure
13Mpa, 40 DEG C of temperature, now carbon dioxide is in a supercritical state, in this case pressurize infiltration 3h, rapid after quick pressure releasing
It is put into and is heated in 100 DEG C of foaming machine, foaming 5min obtains the composite foamed particle of TPU/ conductive fibers.By composite foamed
Grain is squeezed into by spray gun to be heated in 150 DEG C of cavity body of mould, then passes to high steam, steam pressure is 0.3MPa, is now closed
The condensation water valve on one side is closed, steam inlet valve is opened, meanwhile, close the steam inlet valve of opposite face, condensation water valve is opened, with
Steam is set to be sprayed from opposite direction.After logical steam 2min, lead to cooling water cooling 100s, the rear demoulding and drying and shaping, answered
Close expanded material.
Embodiment 6
The metal copper fiber and carbon black fibre of gross weight 10% are added when TPUE is synthesized with quality
Than 1:The mixture of 1.5 compositions, carries out batch mixing synthesis granulation, prepares TPU/ conductive fiber composite materials, particle size control
In 3mm or so.Composite is put into supercritical carbon dioxide infiltration kettle, carbon dioxide is passed through and pressurizes, reach pressure
13Mpa, 40 DEG C of temperature, now carbon dioxide is in a supercritical state, in this case pressurize infiltration 3h, rapid after quick pressure releasing
It is put into and is heated in 100 DEG C of foaming machine, foaming 5min obtains the composite foamed particle of TPU/ conductive fibers.By composite foamed
Grain is squeezed into by spray gun to be heated in 150 DEG C of cavity body of mould, then passes to high steam, steam pressure is 0.3MPa, is now closed
The condensation water valve on one side is closed, steam inlet valve is opened, meanwhile, close the steam inlet valve of opposite face, condensation water valve is opened, with
Steam is set to be sprayed from opposite direction.After logical steam 2min, lead to cooling water cooling 100s, the rear demoulding and drying and shaping, answered
Close expanded material.
Embodiment 7
The carbon black fibre that gross weight 7% is added when TPO elastomers are synthesized carries out batch mixing synthesis granulation, prepares TPO/ charcoals
Black fibre composite, particle size is controlled in 4mm or so.Composite is put into supercritical carbon dioxide infiltration kettle, led to
Enter carbon dioxide and pressurize, pressure is reached 30Mpa, temperature 45 C, now carbon dioxide is in a supercritical state, in this state
Lower pressurize is permeated rapid be put into after 2.5h, quick pressure releasing and is heated in 150 DEG C of foaming machine, and foaming 2min obtains TPO/ carbon blacks
Fiber foam material.Expanded material is squeezed into by spray gun and is heated in 180 DEG C of cavity body of mould, high steam is then passed to, steamed
Steam pressure is 0.7MPa, now closes the condensation water valve on one side, opens steam inlet valve, meanwhile, the steam of opposite face is entered vapour
Valve is closed, and condensation water valve is opened, so that steam sprays from opposite direction.After logical steam 4min, lead to cooling water cooling 130s, after
It is stripped and drying and shaping, obtains composite foam material.
Embodiment 8
The graphene fiber that gross weight 8% is added when POE elastomers are synthesized carries out batch mixing synthesis granulation, prepares POE/
Graphene fiber composite, particle size is controlled in 3mm or so.Composite is put into supercritical carbon dioxide infiltration kettle
In, it is passed through carbon dioxide and pressurizes, pressure is reached 25Mpa, 40 DEG C of temperature, now carbon dioxide is in a supercritical state,
Pressurize is permeated rapid be put into after 2.5h, quick pressure releasing and is heated in 130 DEG C of foaming machine under this state, and foaming 8min is obtained
The composite foamed particle of POE/ graphene fibers.Expanded material is squeezed into by spray gun and is heated in 190 DEG C of cavity body of mould, Ran Houtong
Enter high steam, steam pressure is 0.8MPa, now close the condensation water valve on one side, open steam inlet valve, meanwhile, make relative
The steam inlet valve in face is closed, and condensation water valve is opened, so that steam sprays from opposite direction.After logical steam 3min, lead to cooling
Water cooling 130s, the rear demoulding and drying and shaping, obtain composite foam material.
Comparative example 1
After TPUE and metal copper fiber mixing granulation, carbon dioxide not up to supercritical state is passed through
State, other steps are same as Example 1, do not repeat herein.
Comparative example 2
The difference of comparative example 2 and embodiment 1 is that the metallic copper fiber consumption in comparative example 2 is the 4% of gross weight, its
It is same as Example 1.
Comparative example 3
The difference of comparative example 3 and embodiment 1 is that the metallic copper fiber consumption in comparative example 3 is the 16% of gross weight, its
It is same as Example 1.
Comparative example 4
The difference of comparative example 4 and embodiment 1 is that heating-up temperature is 100 DEG C in foaming process in comparative example 4, during foaming
Between be 15min, it is other same as Example 1.
Comparative example 5
The difference of comparative example 5 and embodiment 1 is that heating-up temperature is 160 DEG C in foaming process in comparative example 5, during foaming
Between be 4min, it is other same as Example 1.
Electricity and Mechanics Performance Testing are carried out to embodiment 1-8 and comparative example 1-5 composite, test result is shown in Table
1。
Table 1
In addition, right in place of the non-limit of claimed technical scope midrange and in embodiment technical scheme
The new technical scheme that the equal replacement of single or multiple technical characteristics is formed, equally all in claimed model
In enclosing；Simultaneously the present invention program it is all enumerate or unrequited embodiment in, parameters in the same embodiment are only
Represent an example (i.e. a kind of feasible scheme) for its technical scheme.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be substituted using similar mode, but simultaneously
Do not deviate by the spirit of the present invention or surmount scope defined in appended claims.
Claims (8)
1. a kind of preparation method of thermoplastic elastomer (TPE)/conductive fiber composite foam material, it is characterised in that the preparation method bag
Include following steps：
(1) by thermoplastic elastomer (TPE) and conductive fiber melt blending, the compound particle that particle diameter is 3-4mm is obtained；
(2) compound particle is put into autoclave, is passed through CO2, make CO2Progress pressurize infiltration in a supercritical state, pressure release
It is put into foaming machine rapidly afterwards, expanded particle is made in foamable；
(3) expanded particle is subjected to steam compression molding, obtains thermoplastic elastomer (TPE)/conductive fiber composite foam material.
2. a kind of preparation method of thermoplastic elastomer (TPE)/conductive fiber composite foam material according to claim 1, it is special
Levy and be, thermoplastic elastomer (TPE) is the one or more in polyurethane elastomer, polyolefin elastomer, styrenic elastomer.
3. a kind of preparation method of thermoplastic elastomer (TPE)/conductive fiber composite foam material according to claim 1, it is special
Levy and be, conductive fiber consumption is the 5-15% of composite gross weight in step (1).
4. a kind of preparation method of thermoplastic elastomer (TPE)/conductive fiber composite foam material according to claim 1 or 3,
Characterized in that, conductive fiber is stainless steel fibre, aluminum fiber, metal copper fiber, carbon black fibre, carbon nano-tube fibre, graphite
One or more in alkene fiber.
5. a kind of preparation method of thermoplastic elastomer (TPE)/conductive fiber composite foam material according to claim 1, it is special
Levy and be, the pressure of step (2) mesohigh reactor is 10-40Mpa, and temperature is 35-55 DEG C.
6. a kind of preparation method of thermoplastic elastomer (TPE)/conductive fiber composite foam material according to claim 1, it is special
Levy and be, pressurize time of penetration is 2-4h in step (2).
7. a kind of preparation method of thermoplastic elastomer (TPE)/conductive fiber composite foam material according to claim 1, it is special
Levy and be, foamable temperature is 100-150 DEG C in step (2), the foamable time is 1-10min.
8. a kind of preparation method of thermoplastic elastomer (TPE)/conductive fiber composite foam material according to claim 1, it is special
Levy and be, include in step (3) the step of steam compression molding：Mould is preheated, expanded beads are squeezed into cavity body of mould, is led to
Enter high steam, after particle fusion bonding, lead to cooling water cooling, then the demoulding and drying and shaping.
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| CN109608704A (en) * | 2018-11-20 | 2019-04-12 | 杭州电子科技大学 | A method of composite conducting rubber is prepared using supercritical fluid technique |
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| CN110511348A (en) * | 2019-08-13 | 2019-11-29 | 江苏澳盛复合材料科技有限公司 | A kind of thermosetting resin cured matter and preparation method thereof of the tool electric conductivity of softness |
| CN111704793A (en) * | 2020-05-26 | 2020-09-25 | 湖北民族大学 | E-TPU composite material single-electrode friction nano generator and preparation method thereof |
| CN111704793B (en) * | 2020-05-26 | 2022-04-01 | 湖北民族大学 | E-TPU composite material single-electrode friction nano generator and preparation method thereof |
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| CN114381062A (en) * | 2022-01-06 | 2022-04-22 | 无锡会通轻质材料股份有限公司 | Intelligent pressure sensing elastomer foaming material based on CNS composite conductive agent |
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