CN109928674A - A kind of preparation method of piezoelectricity ground surface material - Google Patents
A kind of preparation method of piezoelectricity ground surface material Download PDFInfo
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Abstract
The present invention relates to a kind of preparation methods of piezoelectricity ground surface material, belong to new material technology field.The present invention prepares polyacrylonitrile fibre using electrostatic spinning technique, polyacrylonitrile carbon fiber is prepared by pre-oxidation and charing process, one layer of conductive silver glue is uniformly coated in carbon fiber surface, up to piezoelectric material, when being carbonized, it also occur that denitrification reaction forms more regular carbon fiber structural, thus the mechanical property of piezoelectric material；The present invention mixes concrete and piezoelectric material, prepares piezoelectricity ground surface material, electrically conductive graphite powder is added in asphalt, effectively improve the electric conductivity of asphalt, and its pavement performance can satisfy code requirement；Gather materials using thick, fine aggregate mixing, it is main play skeleton function and reduce due to asphalt material during hardening by cooling caused by volume change, simultaneously also as the cheap filler material of asphalt material, coarse aggregate plays skeleton function, and fine aggregate plays a part of to lock and reduce gap.
Description
Technical field
The present invention relates to a kind of preparation methods of piezoelectricity ground surface material, belong to new material technology field.
Background technique
When vehicle driving is by road surface, kinetic energy is changed by available electric energy by piezoelectric ceramics ground surface material.Its
In addition to being used on highway, equally it is also used on railway, airport and the big big square in parking lot or even flow of the people of vehicle flowrate.
Piezoelectric material mix ground surface material in, be fabricated to piezo-electric type ground surface material, on the basis of meeting communication function into
Row power generation, and it can be collected into considerable electricity, the charging for road surface affiliated facility electricity consumption and electric car.Utilize the vibration on road surface
Efficient, clean energy resource production may be implemented with deformation, the vibration and deformation on road surface can also be reduced, extend road surface uses function
Energy and service life.In addition, piezoelectric type vibration power generation is a kind of green environmental protection technique, the requirement of environment self-adaption power supply can satisfy,
Have many advantages, such as long-life, non-maintaining, to have a extensive future.But the poor compatibility of existing piezoelectric material and bituminous pavement
Problem easily leads to cracking and the damage on road surface.
Summary of the invention
The technical problems to be solved by the invention: it is asked for the poor compatibility of existing piezoelectric material and bituminous pavement
The problem of inscribing, easily leading to cracking and the damage on road surface, provides a kind of preparation method of piezoelectricity ground surface material.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
(1) polyacrylonitrile, n,N-Dimethylformamide and electrically conductive graphite powder are mixed, carries out magnetic agitation processing to get spinning
Spinning solution is carried out electrostatic spinning processing to get composite fibre, composite fibre is placed in the baking that temperature is 70~80 DEG C by stoste
Dry fiber is carried out pre-oxidation treatment to get pre-oxidized fibers, by pre-oxidation fibre to get dry fiber by dry 2~3h in case
Dimension carries out carbonization treatment to get carbon fibre, uniformly applies in carbon fibre faces and is covered with one layer of conductive silver glue to get piezoresistive material
Material；
(2) pitch, piezoelectric material, Composite Aggregate, barium titanate are taken, by pitch temperature be 150~160 DEG C at heating 10~
Piezoelectric material is added in base-material to get base-material in 15min, carries out high speed shear processing to get mixture, in the mixture plus
Enter Composite Aggregate and barium titanate, continue 3~5min of stirring to get presoma, presoma is placed in the mold for being coated with vaseline,
Load treatment is carried out, is cooled to room temperature, demoulds up to green body, green body is polarised, is cooled to room temperature to get volt circuit
Plane materiel material.
Polyacrylonitrile, n,N-Dimethylformamide and electrically conductive graphite powder are mixed described in step (1), carry out magnetic agitation
The step of processing are as follows: in mass ratio 1: 5: 1 mixes polyacrylonitrile, n,N-Dimethylformamide and electrically conductive graphite powder, in temperature
It is 40~50 DEG C, mixing speed is 1~3h of magnetic agitation under 400~500r/min.
The step of spinning solution is subjected to electrostatic spinning processing described in step (1) are as follows: spinning solution is subjected to Static Spinning
No. 12 syringe needles are selected in silk processing, and fltting speed is 1~2mL/h, and receiving distance is 15~20cm, and positive pressure is 14~14.5kV, are born
Pressure is 0.5~1kV, and temperature is 25~27 DEG C.
Dry fiber is subjected to pre-oxidation treatment step described in step (1) are as follows: being warming up at 300~350 DEG C will dry
30~40min of fiber preoxidation.
Pre-oxidized fibers are subjected to carbonization treatment step described in step (1) are as follows: be continuously heating at 1200~1300 DEG C
By 1~2h of pre-oxidized fibers carbonization.
The preparation step of Composite Aggregate described in step (2) are as follows: in mass ratio 1: 2 by coarse aggregate basalt and fine aggregate machine
Sand processed is uniformly mixed to get Composite Aggregate.
Pitch described in step (2), piezoelectric material, Composite Aggregate, the ratio between barium titanate are respectively as follows: in parts by weight
Meter, weighs 40~50 parts of pitches, 20~30 parts of piezoelectric materials, 5~10 parts of Composite Aggregates, 1~10 part of barium titanate respectively.
Piezoelectric material is added described in step (2) in base-material, carries out high speed shear processing step are as follows: be added in base-material
Piezoelectric material, 20~30min of high speed shear in the case where shear velocity is 4000~5000r/min.
Presoma is placed in mold by step described in (2), carry out load treatment step are as follows: presoma is placed in be coated with it is all
In the mold of intellectual circle, in the case where pressure is 5~10MPa, load keeps 3~5min.
Green body is polarised step described in step (2) are as follows: by green body temperature be 50 DEG C, voltage 3kV/mm
Lower polarization 10min.
The present invention is compared with other methods, and advantageous effects are:
(1) present invention using electrostatic spinning technique by electrically conductive graphite powder and polyacrylonitrile blended into n,N-Dimethylformamide,
The good polyacrylonitrile composite fiber of electric conductivity is prepared, prepares polyacrylonitrile composite carbon by pre-oxidation and charing process
Fiber coats one layer of conductive silver glue uniformly in carbon fiber surface to get piezoelectric material, stabilized poly- in carbonisation
Dehydration, dehydrogenation and denitrogenation occur for acrylonitrile, in the presence of 400~600 DEG C and inert gas, the oxygen-containing function of oxidized polyacrylonitrile
Dehydrated crosslinking reaction occurs for group, forms stable trapezium structure, this trapezoidal molecule is coupled to graphite-like through dehydrogenation reaction again
As structure, when temperature is increased to 600 DEG C or more, when being carbonized, it also occur that denitrification reaction forms more regular carbon fiber
Structure is tieed up, to improve the mechanical property of piezoelectric material；Polyacrylonitrile fibre has good against weather and mould proof, mothproof etc.
Performance, while there is good environment resistant and heat resistance；
(2) present invention mixes concrete and piezoelectric material, prepares piezoelectricity ground surface material, gathers materials using thick, fine aggregate mixing,
It is main to play skeleton function and reduce the volume change caused during hardening by cooling due to asphalt material, while also as mixing
The cheap filler material of condensation material, coarse aggregate provide skeleton function, and fine aggregate provides locking and reduces the effect in gap；Pitch is one
Kind has viscoelastic cementitious material, it plays the role of binder in mixture, thus gathering materials different dimensions
It is bonded together, and there is certain mechanical strength, to some destructive characteristics such as cracking resistance, fatigue resistance of bituminous pavement
Energy, anti-aging property etc. can play an important role；
(3) polyacrylonitrile has biggish dipole moment in the present invention, and the size of dipole moment will directly affect the oblique pressure of macromolecule material
Electrical property, dipole moment is bigger, and piezoelectric property is likely to better；3 helical conformations are the structure of a type " spring ", the presence of hydrogen bond
The dipole moment of a part of cyano is counteracted, and flat serrations conformation can save the dipole moment of a complete cyano；So
It compares for 3 helical conformations, flat serrations conformation has bigger dipole moment；Polyacrylonitrile mainly has flat serrations and 3
Two kinds of conformations of spiral；During electrostatic spinning, electric field is that can stretch to each root polypropylene nitrile nanofibre, stretches and makees
With polyacrylonitrile fibre can be made to be changed into flat serrations conformation by 3 helical conformations, flat serrations conformation compares 3 helical conformations more
Be conducive to polyacrylonitrile and generate piezoelectric effect, and flat serrations conformation contents increases the dielectric constant that polyacrylonitrile can be improved
And output voltage, improve the piezoelectric property of piezoelectricity ground surface material.
Specific embodiment
In mass ratio 1: 5: 1 by polyacrylonitrile, n,N-Dimethylformamide and electrically conductive graphite powder mix, temperature be 40~
50 DEG C, mixing speed is that spinning solution is carried out Static Spinning to get spinning solution by 1~3h of magnetic agitation under 400~500r/min
No. 12 syringe needles are selected in silk processing, and fltting speed is 1~2mL/h, and receiving distance is 15~20cm, and positive pressure is 14~14.5kV, are born
Pressure is 0.5~1kV, and temperature is 25~27 DEG C to get composite fibre, composite fibre is placed in the baking oven that temperature is 70~80 DEG C
Dry 2~3h is warming up at 300~350 DEG C dry fiber pre-oxidizing 30~40min to get pre-oxidation to get dry fiber
Fiber is continuously heating at 1200~1300 DEG C pre-oxidized fibers being carbonized 1~2h to get carbon fibre, in carbon fibre table
Face, which uniformly applies, is covered with one layer of conductive silver glue to get piezoelectric material；In mass ratio 1: 2 by coarse aggregate basalt and fine aggregate Machine-made Sand
It is uniformly mixed to get Composite Aggregate；According to parts by weight, weigh respectively 40~50 parts of pitches, 20~30 parts of piezoelectric materials, 5~
10 parts of Composite Aggregates, 1~10 part of barium titanate, at being 150~160 DEG C in temperature by pitch 10~15min of heating to get base-material,
Piezoelectric material is added in base-material, 20~30min of high speed shear is in the case where shear velocity is 4000~5000r/min to get mixing
Composite Aggregate and barium titanate are added in the mixture, continues 3~5min of stirring to get presoma, presoma is placed in and is coated with for object
In the mold of vaseline, in the case where pressure is 5~10MPa, load keeps 3~5min, is cooled to room temperature, demoulds up to green body, by base
Body is 50 DEG C in temperature, and voltage is the 10min that polarizes under 3kV/mm, is cooled to room temperature to get piezoelectricity ground surface material.
Example 1
Polyacrylonitrile, n,N-Dimethylformamide and electrically conductive graphite powder are mixed, carry out magnetic agitation processing to get spinning original
Spinning solution is carried out electrostatic spinning processing to get composite fibre, composite fibre is placed in the baking oven that temperature is 70 DEG C and is done by liquid
Dry 2h carries out pre-oxidation treatment to get dry fiber, by dry fiber to get pre-oxidized fibers, and pre-oxidized fibers are carried out carbon
Change processing to get carbon fibre, is uniformly applied in carbon fibre faces and be covered with one layer of conductive silver glue to get piezoelectric material；Take pitch,
Piezoelectric material, Composite Aggregate, barium titanate heat 10min at being 150 DEG C in temperature by pitch to get base-material, are added in base-material
Piezoelectric material carries out high speed shear processing to get mixture, Composite Aggregate and barium titanate is added in the mixture, continues to stir
Presoma is placed in the mold for being coated with vaseline by 3min to get presoma, is carried out load treatment, is cooled to room temperature, demoulding is
Green body is obtained, green body is polarised, is cooled to room temperature to get piezoelectricity ground surface material.By polyacrylonitrile, N, N- dimethyl methyl
Amide and electrically conductive graphite powder mixing, the step of carrying out magnetic agitation processing are as follows: in mass ratio 1: 5: 1 by polyacrylonitrile, N, N- bis-
Methylformamide and electrically conductive graphite powder mixing are 40 DEG C in temperature, and mixing speed is magnetic agitation 1h under 400r/min.By spinning
Stoste carries out the step of electrostatic spinning processing are as follows: spinning solution is carried out electrostatic spinning processing, selects No. 12 syringe needles, fltting speed
For 1mL/h, receiving distance is 15cm, positive pressure 14kV, negative pressure 0.5kV, and temperature is 25 DEG C.Dry fiber is pre-oxidized
Processing step are as follows: be warming up at 300 DEG C and dry fiber is pre-oxidized into 30min.Pre-oxidized fibers are subjected to carbonization treatment step are as follows:
1h that pre-oxidized fibers are carbonized is continuously heating at 1200 DEG C.The preparation step of Composite Aggregate are as follows: in mass ratio 1: 2 by coarse aggregate
Basalt and fine aggregate Machine-made Sand are uniformly mixed to get Composite Aggregate.Pitch, piezoelectric material, Composite Aggregate, between barium titanate
Ratio is respectively as follows: according to parts by weight, weighs 40 parts of pitches, 20 parts of piezoelectric materials, 5 parts of Composite Aggregates, 1 part of barium titanate respectively.
Piezoelectric material is added in base-material, carries out high speed shear processing step are as follows: piezoelectric material is added in base-material, is in shear velocity
High speed shear 20min under 4000r/min.Presoma is placed in mold, carries out load treatment step are as follows: presoma is placed in painting
Have in the mold of vaseline, in the case where pressure is 5MPa, load keeps 35min.Green body is polarised step are as follows: by green body
It is 50 DEG C in temperature, voltage is the 10min that polarizes under 3kV/mm.
Example 2
Polyacrylonitrile, n,N-Dimethylformamide and electrically conductive graphite powder are mixed, carry out magnetic agitation processing to get spinning original
Spinning solution is carried out electrostatic spinning processing to get composite fibre, composite fibre is placed in the baking oven that temperature is 73 DEG C and is done by liquid
Dry 2.3h carries out pre-oxidation treatment to get dry fiber, by dry fiber to get pre-oxidized fibers, and pre-oxidized fibers are carried out
Carbonization treatment uniformly applies in carbon fibre faces to get carbon fibre and is covered with one layer of conductive silver glue to get piezoelectric material；Take drip
Blueness, piezoelectric material, Composite Aggregate, barium titanate heat 12min to get base-material, in base-material at being 1503 DEG C in temperature by pitch
Piezoelectric material is added, carries out high speed shear processing to get mixture, Composite Aggregate and barium titanate is added in the mixture, continues
3.7min is stirred to get presoma, presoma is placed in the mold for being coated with vaseline, load treatment is carried out, is cooled to room temperature,
It demoulds up to green body, green body is polarised, is cooled to room temperature to get piezoelectricity ground surface material.By polyacrylonitrile, N, N- bis-
Methylformamide and electrically conductive graphite powder mixing, carry out magnetic agitation processing the step of are as follows: in mass ratio 1: 5: 1 by polyacrylonitrile,
N,N-Dimethylformamide and electrically conductive graphite powder mixing are 43 DEG C in temperature, and mixing speed is magnetic agitation under 433r/min
1.7h.The step of spinning solution is subjected to electrostatic spinning processing are as follows: spinning solution is subjected to electrostatic spinning processing, selects No. 12 needles
Head, fltting speed 1.3mL/h, receiving distance is 12cm, positive pressure 14.2kV, negative pressure 0.7kV, and temperature is 25.7 DEG C.It will
Dry fiber carries out pre-oxidation treatment step are as follows: is warming up at 317 DEG C dry fiber pre-oxidizing 33min.By pre-oxidized fibers
Carry out carbonization treatment step are as follows: 1..3h that pre-oxidized fibers are carbonized is continuously heating at 1233 DEG C.The preparation step of Composite Aggregate
Are as follows: in mass ratio 1: 2 is uniformly mixed coarse aggregate basalt and fine aggregate Machine-made Sand to get Composite Aggregate.Pitch, piezoresistive material
Material, Composite Aggregate, the ratio between barium titanate are respectively as follows: according to parts by weight, weigh 43 parts of pitches, 23 parts of piezoresistive materials respectively
Material, 7 parts of Composite Aggregates, 3 parts of barium titanates.Piezoelectric material is added in base-material, carries out high speed shear processing step are as follows: in base-material
Piezoelectric material is added, the high speed shear 23min in the case where shear velocity is 4325r/min.Presoma is placed in mold, load is carried out
Processing step are as follows: presoma is placed in the mold for being coated with vaseline, load keeps 4min in the case where pressure is 7MPa.By green body into
Row polarization process step are as follows: by green body in temperature be 50 DEG C, voltage is to polarize 10min under 3kV/mm.
Example 3
Polyacrylonitrile, n,N-Dimethylformamide and electrically conductive graphite powder are mixed, carry out magnetic agitation processing to get spinning original
Spinning solution is carried out electrostatic spinning processing to get composite fibre, composite fibre is placed in the baking oven that temperature is 76 DEG C and is done by liquid
Dry 2.6h carries out pre-oxidation treatment to get dry fiber, by dry fiber to get pre-oxidized fibers, and pre-oxidized fibers are carried out
Carbonization treatment uniformly applies in carbon fibre faces to get carbon fibre and is covered with one layer of conductive silver glue to get piezoelectric material；Take drip
Blueness, piezoelectric material, Composite Aggregate, barium titanate heat 14min to get base-material, in base-material at being 157 DEG C in temperature by pitch
Piezoelectric material is added, carries out high speed shear processing to get mixture, Composite Aggregate and barium titanate is added in the mixture, continues
4.4min is stirred to get presoma, presoma is placed in the mold for being coated with vaseline, load treatment is carried out, is cooled to room temperature,
It demoulds up to green body, green body is polarised, is cooled to room temperature to get piezoelectricity ground surface material.By polyacrylonitrile, N, N- bis-
Methylformamide and electrically conductive graphite powder mixing, carry out magnetic agitation processing the step of are as follows: in mass ratio 1: 5: 1 by polyacrylonitrile,
N,N-Dimethylformamide and electrically conductive graphite powder mixing are 47 DEG C in temperature, and mixing speed is magnetic agitation under 475r/min
2.3h.The step of spinning solution is subjected to electrostatic spinning processing are as follows: spinning solution is subjected to electrostatic spinning processing, selects No. 12 needles
Head, fltting speed 1.7mL/h, receiving distance is 18cm, positive pressure 14.4kV, negative pressure 0.8kV, and temperature is 26 DEG C.It will do
Dry fiber carries out pre-oxidation treatment step are as follows: is warming up at 334 DEG C dry fiber pre-oxidizing 37min.By pre-oxidized fibers into
Row carbonization treatment step are as follows: be continuously heating at 1265 DEG C 1.5h that pre-oxidized fibers are carbonized.The preparation step of Composite Aggregate are as follows:
In mass ratio 1: 2 is uniformly mixed coarse aggregate basalt and fine aggregate Machine-made Sand to get Composite Aggregate.Pitch, is answered at piezoelectric material
Ratio between intersection material, barium titanate is respectively as follows: according to parts by weight, weighs 47 parts of pitches, 27 parts of piezoelectric materials, 8 parts respectively
Composite Aggregate, 7 parts of barium titanates.Piezoelectric material is added in base-material, carries out high speed shear processing step are as follows: pressure is added in base-material
Electric material, the high speed shear 270min in the case where shear velocity is 4750r/min.Presoma is placed in mold, load treatment is carried out
Step are as follows: presoma is placed in the mold for being coated with vaseline, load keeps 4in in the case where pressure is 7.5MPa.Green body is carried out
Polarization process step are as follows: by green body in temperature be 50 DEG C, voltage is to polarize 10min under 3kV/mm.
Example 4
Polyacrylonitrile, n,N-Dimethylformamide and electrically conductive graphite powder are mixed, carry out magnetic agitation processing to get spinning original
Spinning solution is carried out electrostatic spinning processing to get composite fibre, composite fibre is placed in the baking oven that temperature is 80 DEG C and is done by liquid
Dry 3h carries out pre-oxidation treatment to get dry fiber, by dry fiber to get pre-oxidized fibers, and pre-oxidized fibers are carried out carbon
Change processing to get carbon fibre, is uniformly applied in carbon fibre faces and be covered with one layer of conductive silver glue to get piezoelectric material；Take pitch,
Piezoelectric material, Composite Aggregate, barium titanate heat 15min at being 160 DEG C in temperature by pitch to get base-material, are added in base-material
Piezoelectric material carries out high speed shear processing to get mixture, Composite Aggregate and barium titanate is added in the mixture, continues to stir
Presoma is placed in the mold for being coated with vaseline by 5min to get presoma, is carried out load treatment, is cooled to room temperature, demoulding is
Green body is obtained, green body is polarised, is cooled to room temperature to get piezoelectricity ground surface material.By polyacrylonitrile, N, N- dimethyl methyl
Amide and electrically conductive graphite powder mixing, the step of carrying out magnetic agitation processing are as follows: in mass ratio 1: 5: 1 by polyacrylonitrile, N, N- bis-
Methylformamide and electrically conductive graphite powder mixing are 50 DEG C in temperature, and mixing speed is magnetic agitation 3h under 500r/min.By spinning
Stoste carries out the step of electrostatic spinning processing are as follows: spinning solution is carried out electrostatic spinning processing, selects No. 12 syringe needles, fltting speed
For 2mL/h, receiving distance is 20cm, positive pressure 14.5kV, negative pressure 1kV, and temperature is 27 DEG C.Dry fiber is pre-oxidized
Processing step are as follows: be warming up at 350 DEG C and dry fiber is pre-oxidized into 40min.Pre-oxidized fibers are subjected to carbonization treatment step are as follows:
2h that pre-oxidized fibers are carbonized is continuously heating at 1300 DEG C.The preparation step of Composite Aggregate are as follows: in mass ratio 1: 2 by coarse aggregate
Basalt and fine aggregate Machine-made Sand are uniformly mixed to get Composite Aggregate.Pitch, piezoelectric material, Composite Aggregate, between barium titanate
Ratio is respectively as follows: according to parts by weight, weighs 50 parts of pitches, 30 parts of piezoelectric materials, 10 parts of Composite Aggregates, 10 parts of metatitanic acids respectively
Barium.Piezoelectric material is added in base-material, carries out high speed shear processing step are as follows: piezoelectric material is added in base-material, in shearing speed
Degree is high speed shear 30min under 5000r/min.Presoma is placed in mold, carries out load treatment step are as follows: set presoma
In the mold for being coated with vaseline, in the case where pressure is 10MPa, load keeps 5min.Green body is polarised step are as follows: will
Green body is 50 DEG C in temperature, and voltage is the 10min that polarizes under 3kV/mm.
Piezoelectricity ground surface material prepared by the present invention is detected, specific testing result is as follows:
Test method: detecting to piezoelectricity ground surface material is obtained, and the piezoelectric strain by composite piezoelectric material known to detection is normal
Number d33 is 45.6pC/N, and the piezoelectric voltage constant g33 of composite piezoelectric material is 26.3 × 10-3Vm/N, composite piezoelectric material
Dielectric loss Tan δ is 0.070；
The springform of piezoelectricity ground surface material prepared by the present invention is detected using asphalt uniaxial compression test (cylindrical body method)
Amount, it is known that the elasticity modulus of piezoelectricity ground surface material is 700MPa, and the elasticity modulus of bituminous pavement is generally 1000MPa, therefore
The elasticity modulus that piezoelectricity ground surface material prepared by the present invention has and bituminous pavement matches, can directly be laid with road surface with it, gram
The poor compatibility for taking existing piezoelectric material and bituminous pavement, the problem of leading to cracking and the damage on road surface, have wide answer
Use prospect.
Claims (10)
1. a kind of preparation method of piezoelectricity ground surface material, it is characterised in that specific steps are as follows:
(1) polyacrylonitrile, n,N-Dimethylformamide and electrically conductive graphite powder are mixed, carries out magnetic agitation processing to get spinning
Spinning solution is carried out electrostatic spinning processing to get composite fibre, composite fibre is placed in the baking that temperature is 70~80 DEG C by stoste
Dry fiber is carried out pre-oxidation treatment to get pre-oxidized fibers, by pre-oxidation fibre to get dry fiber by dry 2~3h in case
Dimension carries out carbonization treatment to get carbon fibre, uniformly applies in carbon fibre faces and is covered with one layer of conductive silver glue to get piezoresistive material
Material；
(2) pitch, piezoelectric material, Composite Aggregate, barium titanate are taken, by pitch temperature be 150~160 DEG C at heating 10~
Piezoelectric material is added in base-material to get base-material in 15min, carries out high speed shear processing to get mixture, in the mixture plus
Enter Composite Aggregate and barium titanate, continue 3~5min of stirring to get presoma, presoma is placed in the mold for being coated with vaseline,
Load treatment is carried out, is cooled to room temperature, demoulds up to green body, green body is polarised, is cooled to room temperature to get volt circuit
Plane materiel material.
2. a kind of preparation method of piezoelectricity ground surface material according to claim 1, it is characterised in that: described in step (1)
The step of polyacrylonitrile, n,N-Dimethylformamide and electrically conductive graphite powder are mixed, magnetic agitation processing is carried out are as follows: in mass ratio
Mix polyacrylonitrile, n,N-Dimethylformamide and electrically conductive graphite powder at 1: 5: 1, is 40~50 DEG C in temperature, mixing speed is
1~3h of magnetic agitation under 400~500r/min.
3. a kind of preparation method of piezoelectricity ground surface material according to claim 1, it is characterised in that: described in step (1)
The step of spinning solution is subjected to electrostatic spinning processing are as follows: spinning solution is subjected to electrostatic spinning processing, No. 12 syringe needles is selected, pushes away
It is 1~2mL/h into speed, receiving distance is 15~20cm, and positive pressure is 14~14.5kV, and negative pressure is 0.5~1kV, temperature 25
~27 DEG C.
4. a kind of preparation method of piezoelectricity ground surface material according to claim 1, it is characterised in that: described in step (1)
Dry fiber is subjected to pre-oxidation treatment step are as follows: be warming up at 300~350 DEG C and dry fiber is pre-oxidized into 30~40min.
5. a kind of preparation method of piezoelectricity ground surface material according to claim 1, it is characterised in that: described in step (1)
Pre-oxidized fibers are subjected to carbonization treatment step are as follows: 1~2h that pre-oxidized fibers are carbonized is continuously heating at 1200~1300 DEG C.
6. a kind of preparation method of piezoelectricity ground surface material according to claim 1, it is characterised in that: described in step (2)
The preparation step of Composite Aggregate are as follows: in mass ratio 1: 2 is uniformly mixed coarse aggregate basalt and fine aggregate Machine-made Sand to get compound
Gather materials.
7. a kind of preparation method of piezoelectricity ground surface material according to claim 1, it is characterised in that: described in step (2)
Pitch, piezoelectric material, Composite Aggregate, the ratio between barium titanate are respectively as follows: according to parts by weight, weigh 40~50 parts of drips respectively
Blueness, 20~30 parts of piezoelectric materials, 5~10 parts of Composite Aggregates, 1~10 part of barium titanate.
8. a kind of preparation method of piezoelectricity ground surface material according to claim 1, it is characterised in that: described in step (2)
Piezoelectric material is added in base-material, carries out high speed shear processing step are as follows: piezoelectric material is added in base-material, is in shear velocity
20~30min of high speed shear under 4000~5000r/min.
9. a kind of preparation method of piezoelectricity ground surface material according to claim 1, it is characterised in that: described in step (2)
Presoma is placed in mold, carries out load treatment step are as follows: presoma is placed in the mold for being coated with vaseline, is in pressure
Load keeps 3~5min under 5~10MPa.
10. a kind of preparation method of piezoelectricity ground surface material according to claim 1, it is characterised in that: described in step (2)
Green body is polarised step are as follows: by green body in temperature be 50 DEG C, voltage is to polarize 10min under 3kV/mm.
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