CN106381592A - Carbon nanometer tube flat filament, preparation method and preparation device thereof - Google Patents
Carbon nanometer tube flat filament, preparation method and preparation device thereof Download PDFInfo
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- CN106381592A CN106381592A CN201610807889.3A CN201610807889A CN106381592A CN 106381592 A CN106381592 A CN 106381592A CN 201610807889 A CN201610807889 A CN 201610807889A CN 106381592 A CN106381592 A CN 106381592A
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- cnt
- flat filament
- raw yarn
- preparation
- yarn bundle
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
Abstract
The invention discloses a carbon nanometer tube flat filament, a preparation method and a preparation device thereof. The preparation method for the carbon nanometer tube flat filament comprises the following steps: drawing out a carbon nanometer tube base yarn beam; successively semi-lapping the carbon nanometer tube base yarn beam on at least four rollers at sequentially increasing linear velocity, thereby drawing the carbon nanometer tube base yarn beam; stretching the carbon nanometer tube base yarn beam in S form among at least four rollers and respectively resisting at least two rollers against the two opposite sides of the carbon nanometer tube base yarn beam, thereby obtaining the carbon nanometer tube flat filament. Compared with the prior art, the preparation method has the advantages that the preparation rate of the carbon nanometer tube flat filament is greatly increased through a gradual stretching method; the carbon nanometer tubes in the carbon nanometer tube flat filament are arrayed in an oriented way along the axial direction of the flat filament; the directional problem in a use process can be reduced; the carbon nanometer tube flat filament is flat; the combination degree between the carbon nanometer tubes in the carbon nanometer tube flat filament is higher and the density is increased; the contact area between the carbon nanometer tube flat filament and the carbon nanometer tube flat filament or the resin in the use process is increased; the interface bonding performance is increased.
Description
Technical field
The present invention relates to carbon nanotube technology field, particularly to a kind of CNT flat filament and preparation method thereof and preparation
Device.
Background technology
CNT is that the quality having now been found that is the lightest, intensity highest one-dimensional linear material, is collection mechanics, electricity, heat
Placed high hopes by people always since learning the multifunctional material that is integrated of performance, self-discovery, the past ten years by conduct
Mechanics reinforcement has carried out numerous studies, but because, the problems such as content, orientation, combination each other, its mechanical property is always
It does not get a qualitative improvement.
Carbon nano-tube fibre as CNT macroscopic view one-dimensional gather form, be CNT from microcosmic to macroscopic view application
One of most important appearance form, carbon pipe content reaches more than 95% it is easier to play the performance of CNT, enjoys for many years
Research worker is paid close attention to.At present, the method preparing carbon nano-tube fibre mainly has 3 kinds：Array spin processes, direct spinning and solution
Spin processes.Wherein, carbon nano-tube fibre is obtained substantially by the way of twisting, and the mode of twisting prepares the skill of carbon nano-tube fibre
Art is primarily present following shortcoming：
1）The carbon nano-tube fibre of preparation, CNT and fiber axially have certain angle, easily make fiber use process
The certain directivity of middle generation, when preparing composite using fiber, directional requirement is higher, increased difficulty of processing,
Have influence on composite property；
2）In the preparation process of carbon nano-tube fibre, higher to the ring ingot rotation speed requirements of twisting part, output speed and ring ingot turn
Speed can not be mated, and greatly limit the preparation speed of fiber；
3）The carbon nano-tube fibre of preparation is less due to the applied external force being subject to, and interaction or solvent mainly by itself gather
The assosting effect of compound combines, and combination degree each other is low, and mechanical property is low；And add solvent polymeric thing when due to
Introduce polymer although mechanics obtains strengthens to a certain extent, but can reduce electrically and thermally performance.
Content of the invention
It is at least to solve one of above-mentioned technical problem, it is an object of the invention to provide a kind of CNT flat filament and its system
Preparation Method and preparation facilitiess, not only can ensure the electricity of CNT flat filament, calorifics, mechanical property, and solve difficult processing
Spend big problem.
One of for achieving the above object, an embodiment of the present invention provides a kind of preparation side of CNT flat filament
Method, methods described includes step：
Draw CNT raw yarn bundle；
By CNT raw yarn Shu Yici half around being wrapped at least four roller bearings that linear velocity order increases, so that CNT is former
Yarn bundle is drafted；Wherein, CNT raw yarn bundle S-shaped extension between at least four roller bearings, so that at least two roller bearings can
Support the opposite sides of CNT raw yarn bundle respectively；
Obtain CNT flat filament.
As the improvement further of an embodiment of the present invention, described step " drawing CNT raw yarn bundle " includes：
CNT raw yarn bundle is drawn with constant speed, and controls the diameter of CNT raw yarn bundle to be consistent.
As the improvement further of an embodiment of the present invention, described step " obtaining CNT flat filament " includes：
By compression roller to the CNT raw yarn Shu Jinhang extrusion process after drafted；
Obtain CNT flat filament.
One of for achieving the above object, an embodiment of the present invention additionally provides a kind of preparation of CNT flat filament
Method, methods described includes step：
Draw CNT raw yarn bundle；
By CNT raw yarn Shu Yici half around being wrapped at least four roller bearings that linear velocity order increases, so that CNT is former
Yarn bundle is drafted；
By compression roller to the CNT raw yarn Shu Jinhang extrusion process after drafted；
Obtain CNT flat filament.
One of for achieving the above object, an embodiment of the present invention additionally provides a kind of preparation of CNT flat filament
Method is it is characterised in that methods described includes step：
Draw CNT raw yarn bundle；
By CNT raw yarn Shu Yici half around being wrapped at least four roller bearings and through the accommodation space a pair of compression roller
Afterwards, one end of CNT raw yarn bundle is fixed on collection axle；
Rotate roller bearing, compression roller and collect axle and control each roller bearing, compression roller and the rotating speed collecting axle, so that CNT is former
Yarn bundle remains that identical extensibility is drafted and is extruded；
Obtain being collected in the CNT flat filament collected on axle.
One of for achieving the above object, an embodiment of the present invention additionally provides a kind of preparation of CNT flat filament
Device, described preparation facilitiess include：
Frame；
Output shaft, is arranged in described frame and collects the aqueous raw yarn of CNT that can draw CNT raw yarn bundle；
Draw roll, including spaced apart and rotate respectively and be arranged at least four roller bearings in described frame；
Collect axle, rotate and be arranged in described frame；
Drive system, for driving roller bearing described at least four to rotate with different linear velocities respectively, so that described CNT is former
Drafted in draw roll described in yarn Shu Yu and flat to collect the described CNT of formation for driving described collection axle to rotate
Silk.
As the improvement further of an embodiment of the present invention, two ends that each described roller bearing includes being oppositely arranged,
And supporting the groove of described CNT raw yarn bundle, the diameter of described groove is less than the diameter of two described ends.
As the improvement further of an embodiment of the present invention, on the bearing of trend of described CNT raw yarn bundle, after
The diameter of the described groove than previous described roller bearing for the diameter of the described groove of roller bearing described in increases 2%, and described drive system
Each described roller bearing is driven to rotate with same angular velocity.
As the improvement further of an embodiment of the present invention, described preparation facilitiess also include rotating respectively be arranged at described
A pair of compression roller in frame, described in a pair between compression roller formed accommodation space, drafted after described CNT raw yarn
Bundle may pass through described accommodation space and compression roller described in a pair extrudes.
One of for achieving the above object, an embodiment of the present invention additionally provides a kind of CNT flat filament, described
CNT flat filament is obtained by preparation method as above.
Compared with prior art, the invention has the advantages that：By making CNT raw yarn bundle by drawing-off step by step
Method, not only solve the prior art twisting output speed of the mode and impact of ring ingot rotating speed, and be easy to control and significantly
Improve the preparation speed of CNT flat filament；In the CNT flat filament prepared by drawing-off mode, CNT is along flat filament axial direction
Orientations, reduce the problem of directivity in use；CNT flat filament is made to be in flat by compressing/extruding,
Combination degree between its inner carbon nanotube is higher and density increases, to ensure its preferable mechanics, calorifics and electric property；Separately
Outward, so that the contact area between CNT flat filament or and resin between is increased in use, and then improve interface cohesion
Performance.
Brief description
Fig. 1 is the flow chart of the preparation method of CNT flat filament of an embodiment of the present invention；
Fig. 2 be CNT raw yarn bundle, CNT raw yarn bundle drafted after, CNT raw yarn bundle drafted and after extruding
Extension at break curve comparison figure；
Fig. 3 is the first multiplying power electron microscope of the CNT flat filament of an embodiment of the present invention；
Fig. 4 is the second multiplying power electron microscope of the CNT flat filament of an embodiment of the present invention；
Fig. 5 is the load comparison having sth. made by twisting carbon nano-tube fibre with prior art for the CNT flat filament of an embodiment of the present invention
Figure；
Fig. 6 is the flow chart of the preparation method of CNT flat filament of another embodiment of the present invention；
Fig. 7 is the draw roll schematic diagram of the preparation facilitiess of CNT flat filament of an embodiment of the present invention.
Specific embodiment
Describe the present invention below with reference to specific embodiment shown in the drawings.But these embodiments are simultaneously
Do not limit the present invention, structure that those of ordinary skill in the art is made, method or functionally according to these embodiments
Conversion is all contained in protection scope of the present invention.
Referring to Fig. 1, an embodiment of the present invention provides a kind of preparation method of CNT flat filament, described preparation method
Including step：
Draw CNT raw yarn bundle；
By CNT raw yarn Shu Yici half around being wrapped at least four roller bearings that linear velocity order increases, so that CNT is former
Yarn bundle is drafted；Wherein, CNT raw yarn bundle S-shaped extension between at least four roller bearings, so that at least two roller bearings can
Support the opposite sides of CNT raw yarn bundle respectively；
Obtain CNT flat filament.
The preparation method of the CNT flat filament of an embodiment of the present invention, by arranging at least four roller bearings, makes carbon receive
Mitron raw yarn bundle, by drawing-off step by step, not only solves the prior art twisting output speed of mode and the impact of ring ingot rotating speed,
Drafting process makes CNT in the CNT flat filament prepared arrange along flat filament axial orientation, reduces in use
The problem of directivity；In addition, in drafting process, so that the opposite sides of CNT raw yarn bundle is supported by roller bearing respectively and
There is flattening, make the combination degree between CNT in the CNT flat filament of preparation higher and density increases.
Specifically, in an embodiment of the present invention, in described step " drawing CNT raw yarn bundle ", described carbon nanometer
Pipe raw yarn bundle is drawn from the output shaft with the aqueous raw yarn of CNT, and during drafted, described CNT is aqueous
Moisture in raw yarn gradually can be deviate from drawing-off.
Wherein, described step " drawing CNT raw yarn bundle " includes：
CNT raw yarn bundle is drawn with constant speed, and controls the diameter of CNT raw yarn bundle to be consistent.
So, the uniformity of the described CNT raw yarn bundle of extraction can be made higher, and then ensure in follow-up drafting process
In described CNT raw yarn bundle Tension Evenness, and ensure preparation described CNT flat filament uniformity.
Further, in an embodiment of the present invention, define described CNT raw yarn bundle from described output shaft to institute
The direction stating collection axle is the bearing of trend of described CNT raw yarn bundle, near described output shaft on described bearing of trend
Direction be front, away from described output shaft direction be after.
Wherein, described step is " by CNT raw yarn Shu Yici half around at least four rollings being wrapped in linear velocity order increase
On axle, so that CNT raw yarn bundle is drafted " in：
On described bearing of trend, the linear velocity order that roller bearing described at least four rotates increases, that is, roller bearing described in rear
Linear velocity is more than the linear velocity of previous described roller bearing.So it is ensured that the described carbon nanometer gradually increasing with drawing-off degree
Pipe raw yarn bundle is in tensioning state all the time.Preferably, the linear velocity that roller bearing described at least four rotates is in that arithmetic progression is incremented by, this
Sample is it is ensured that described CNT raw yarn bundle keeps constant extensibility, and then ensures the described CNT between each roller bearing
The tension force of raw yarn bundle is equal.
Specifically, in an embodiment of the present invention, roller bearing described at least four is used for supporting described CNT raw yarn
Bundle position diameter with 2% amplification incremented by successively, that is, roller bearing described in rear is used for supporting described CNT raw yarn
The diameter that the diameter at the position of bundle is used for supporting the position of described CNT raw yarn bundle than previous described roller bearing increases 2%；
Roller bearing described at least four is controlled to rotate with same angular velocity, so, you can the linear velocity of roller bearing described in after making is more than previous
The linear velocity of described roller bearing.So arrange, do not only reach the effect of drawing-off step by step, and the convenient speed controlling to roller bearing.
In addition, the extensibility of described CNT raw yarn bundle is determined by the linear velocity of its rate of withdraw and last roller bearing
Fixed, it is also dependent upon the quantity of described roller bearing, the extensibility of described CNT raw yarn bundle increases with the quantity of described roller bearing meanwhile
Many and increase.
Further, in an embodiment of the present invention, described CNT raw yarn bundle in roller bearing described at least four it
Between S-shaped extension so that at least two roller bearings can support the opposite sides of CNT raw yarn bundle respectively it is preferable that any phase
Adjacent two roller bearings support the opposite sides of CNT raw yarn bundle respectively.So, described CNT raw yarn bundle can be made to be led
While stretching, its opposite sides is subject to the support force of two neighboring described roller bearing to be deformed, formation flat, one respectively
Aspect can slough moisture；On the other hand the CNT densification in described CNT raw yarn bundle can be made；And make prepared
CNT flat filament has flat pattern, thus making connecing between CNT flat filament or and resin between in use
Contacting surface is amassed and is increased, and then improves interfacial combined function.
Further, in an embodiment of the present invention, described CNT raw yarn bundle during drafted, described carbon
The width of nanotube raw yarn bundle narrows after leaving each described roller bearing.
Specifically, each described roller bearing includes two ends and the groove between two described ends, described groove
I.e. described roller bearing is used for supporting the position of described CNT raw yarn bundle.When the support of described CNT raw yarn bundle branch is described around being wrapped in
When on roller bearing, described CNT raw yarn bundle can concentrate on described groove, so that closeness is reduced to avoid excessively disperseing.With
The increase of drawing-off degree, the size of described CNT raw yarn bundle（Namely width）Reduce step by step, corresponding, previous described
The width of the described groove of roller bearing is big compared with the width of the described groove of roller bearing described in rear, so that described CNT raw yarn bundle exists
Gathered after described roller bearing and tightened up.
Further, in an embodiment of the present invention, described step " obtaining CNT flat filament " includes：
By compression roller to the CNT raw yarn Shu Jinhang extrusion process after drafted；
Obtain CNT flat filament.
Referring to Fig. 2, by contrasting CNT raw yarn bundle, drafted rear, the CNT raw yarn bundle of CNT raw yarn bundle
Drafted and extension at break curve after extruding is it can be seen that CNT raw yarn bundle is drafted and fracture strength after extruding
It is better than CNT raw yarn bundle after drafted better than CNT raw yarn bundle.So can obtain, by the described carbon after drafted
Nanotube raw yarn Shu Jinhang extrusion process, can make the combination degree between CNT in the CNT flat filament of preparation obtain further
To improving, global density increases further, to play the effect of CNT to a greater degree.
Specifically, at described step " by compression roller to the CNT raw yarn Shu Jinhang extrusion process after drafted "
In, described compression roller is set to a pair cooperating, and has accommodation space described in a pair between compression roller, drafted after institute
State CNT raw yarn bundle may pass through described accommodation space and at described accommodation space compression roller described in a pair extruded
Process.So, improve the combination degree of CNT and density further, make CNT flat filament bear external force ability remote
Carbon nano-tube fibre more than the twisting method preparation of prior art.
, during being extruded, compression roller described in a pair is to described CNT raw yarn bundle for described CNT raw yarn bundle
When pressure reaches maximum, its occlusion precision need to reach 1 micron.As being unable to reach 1 micron, can by compression roller described in a pair it
Between set up auxiliary occlusion material realizing, described auxiliary occlusion material may be configured as aluminium foil etc..
Further, in an embodiment of the present invention, in described step " obtaining CNT flat filament ", received by collecting axle
The described CNT flat filament of collection preparation.
In addition, by the rotating speed controlling described roller bearing, described compression roller and described collection axle, making described CNT raw yarn
Bundle is in tensioning state during forming described CNT flat filament all the time, and can control the preparation of described CNT flat filament
Speed.So, be greatly improved the preparation speed of CNT flat filament, can reach 10m/min, be have twist with the fingers 10 times of fiber with
On.
An embodiment of the present invention also provides a kind of CNT flat filament, and described CNT flat filament is by making as above
Preparation Method is obtained.
Referring to Fig. 3 and Fig. 4, the CNT within described CNT flat filament arranges along flat filament axial orientation, is using
During reduce the problem of directivity；And the combination degree between CNT is larger and global density is higher, so that described carbon
Nanotube flat filament has fabulous mechanics, calorifics and electric property；In addition, described CNT flat filament is in flat pattern, make
With during can increase contact area between CNT flat filament or with interlaminar resin, and then improve interfacial combined function, preparation
Preferably carbon nano-tube fibre composite.
Referring to Fig. 5, the described CNT flat filament that contrast an embodiment of the present invention provides has sth. made by twisting carbon with prior art
The load of nanotube fibers, the load of described CNT flat filament is substantially better than the existing load having and twisting with the fingers carbon nano-tube fibre.
Referring to Fig. 6, Fig. 6 is the preparation method of the CNT flat filament of another embodiment of the present invention, present embodiment with
The differing only in of a upper embodiment：In the preparation method of a upper embodiment, by by CNT raw yarn Shu Yu at least
S-shaped extension between four roller bearings, so that at least two roller bearings can support the opposite sides of CNT raw yarn bundle respectively, you can real
The flattening of existing CNT raw yarn bundle；And in the preparation method of present embodiment, can be by CNT raw yarn Shu Yu at least four
S-shaped extension or not S-shaped between individual roller bearing（Such as spiral type）Extend, so that at least side quilt of described CNT raw yarn bundle
Flatten, then by the extruding of compression roller, realize the flattening of CNT raw yarn bundle.In addition to above-mentioned difference, other all with upper
The preparation method of one embodiment is identical, will not be described here.
Specifically, in the present embodiment, described preparation method includes step：
Draw CNT raw yarn bundle；
By CNT raw yarn Shu Yici half around being wrapped at least four roller bearings that linear velocity order increases, so that CNT is former
Yarn bundle is drafted；
By compression roller to the CNT raw yarn Shu Jinhang extrusion process after drafted；
Obtain CNT flat filament.
The preparation method of the CNT flat filament of an embodiment of the present invention, by arranging at least four roller bearings, makes carbon receive
Mitron raw yarn bundle, by drawing-off step by step, not only eliminates the prior art twisting output speed of mode and the impact of ring ingot rotating speed,
Drafting process makes CNT in the CNT flat filament prepared arrange along flat filament axial orientation, reduces in use
The problem of directivity；Carry out supporting pressing by least side in the opposite sides to CNT raw yarn bundle for the roller bearing, and lead to
Cross the CNT raw yarn Shu Jinhang extrusion process after compression roller counter extensioin, make in the CNT flat filament of preparation between CNT
Combination degree be improved, global density increase, to play the effect of CNT to a greater degree.
Corresponding, an embodiment of the present invention additionally provides a kind of CNT flat filament, described CNT flat filament by
Preparation method mode described in is performed as described above be obtained.CNT within described CNT flat filament is arranged along flat filament axial orientation
Row, reduce the problem of directivity in use；And the combination degree between CNT is larger and global density is higher, with
Described CNT flat filament is made to have fabulous mechanics, calorifics and electric property；In addition, described CNT flat filament is in pancake
Shape, can increase the contact area between CNT flat filament or with interlaminar resin in use, and then improves interfacial bonding property
Can, prepare more preferable carbon nano-tube fibre composite.
Referring to Fig. 7, an embodiment of the present invention additionally provides a kind of preparation facilitiess of CNT flat filament, described preparation dress
Put including frame, output shaft, draw roll, collect axle and drive system.
Described frame is used for supporting and fix the other parts of described preparation facilitiess.
Described output shaft be arranged in described frame and collect can draw CNT raw yarn bundle CNT aqueous
Raw yarn.
Described draw roll includes spaced apart and rotates at least four roller bearings being arranged in described frame respectively.
Described collection axle rotates and is arranged in described frame.
Described drive system is used for driving roller bearing described at least four to rotate with different linear velocities respectively, so that described carbon is received
Drafted in draw roll described in mitron raw yarn Shu Yu, and received with collecting the described carbon of formation for driving described collection axle to rotate
Mitron flat filament.
The preparation method of the CNT flat filament of an embodiment of the present invention, by arranging at least four roller bearings, and passes through
Control roller bearing described at least four to rotate with different linear velocities respectively, make CNT raw yarn bundle by drawing-off step by step, not only solve
The prior art twisting output speed of mode and the impact of ring ingot rotating speed, in drafting process so that the CNT flat filament of preparation
Middle CNT arranges along flat filament axial orientation, reduces the problem of directivity in use.
Specifically, in an embodiment of the present invention, described output shaft is set to be removably attachable in described frame,
The aqueous raw yarn of CNT is had on described output shaft and described CNT raw yarn bundle can be drawn with constant speed.So, may be used
Make the uniformity of the described CNT raw yarn bundle of extraction higher, and then ensure the described CNT in follow-up drafting process
The Tension Evenness of raw yarn bundle, and ensure the uniformity of the described CNT flat filament of preparation.
Described CNT raw yarn bundle, can be successively half around being wrapped in after roller bearing described at least four after described output shaft is drawn
And its one end is fixed on described collection axle.Open described preparation facilitiess, described drive system drives described roller bearing and described receipts
The rotation of collection axle, so that described CNT raw yarn bundle forms CNT flat filament and is received by described collection axle after obtaining drawing-off
Collection.
Further, in an embodiment of the present invention, define described CNT raw yarn bundle from described output shaft to institute
The direction stating collection axle is the bearing of trend of described CNT raw yarn bundle, near described output shaft on described bearing of trend
Direction be front, away from described output shaft direction be after.
Wherein, on described bearing of trend, described drive system can drive the linear velocity that roller bearing described at least four rotates
Order increases, that is, the linear velocity of roller bearing described in rear is more than the linear velocity of previous described roller bearing.So it is ensured that with leading
The described CNT raw yarn bundle stretched degree and gradually increase is in tensioning state all the time.Preferably, described drive system can drive
The linear velocity that roller bearing described at least four rotates is in that arithmetic progression is incremented by, so it is ensured that described CNT raw yarn bundle keeps
The tension force of the described CNT raw yarn bundle between constant extensibility, and then each roller bearing of guarantee is equal.
Further, in an embodiment of the present invention, each described roller bearing includes two ends and positioned at described in two
Groove between end.When described CNT raw yarn bundle branch support around be wrapped on described roller bearing when, described CNT raw yarn bundle
Described groove can be concentrated on, so that closeness is reduced.With the increase of drawing-off degree, described carbon nanometer
The size of pipe raw yarn bundle（Namely width）Reduce step by step, corresponding, the width relatively rear of the described groove of previous described roller bearing
The width of the described groove of described roller bearing is big, so that described CNT raw yarn bundle is received being gathered after described roller bearing
Tightly.
Further, on described bearing of trend, the diameter of the described groove of roller bearing described at least four is with 2% amplification
Incremented by successively, that is, the diameter of the described groove than previous described roller bearing for the diameter of the described groove of roller bearing described in rear increases
2%；Described drive system drives roller bearing described at least four to rotate with same angular velocity, so, you can roller bearing described in after making
Linear velocity is more than the linear velocity of previous described roller bearing.So arrange, do not only reach the effect of drawing-off step by step, and conveniently to roller bearing
Speed controlling.
Further, in an embodiment of the present invention, described preparation facilitiess also include rotating respectively and are arranged at described machine
A pair of compression roller on frame, has accommodation space between compression roller described in a pair.Compression roller described in a pair is located at described draw roll
Last described roller bearing and described collection axle between, drafted after described CNT raw yarn bundle leave last institute
May pass through described accommodation space after stating roller bearing and compression roller described in a pair extrudes.So, improve the knot of CNT further
Conjunction degree and density, make the carbon that the ability that CNT flat filament bears external force is much larger than the twisting method preparation of prior art receive
Mitron fiber.
, during being extruded, compression roller described in a pair is to described CNT raw yarn bundle for described CNT raw yarn bundle
When pressure reaches maximum, its occlusion precision need to reach 1 micron.As being unable to reach 1 micron, can by compression roller described in a pair it
Between set up auxiliary occlusion material realizing, described auxiliary occlusion material may be configured as aluminium foil etc..
In addition, described drive system can drive and control the rotating speed of described roller bearing, described compression roller and described collection axle, make
Described CNT raw yarn bundle is in tensioning state all the time and keeps identical extensibility drafted and be extruded, and controllable described
The preparation speed of CNT flat filament.So, it is greatly improved the preparation speed of CNT flat filament, can reach 10m/min, be
There are twist with the fingers fiber more than 10 times.
Compared with prior art, the invention has the advantages that：By making CNT raw yarn bundle by drawing-off step by step
Method, not only solve the prior art twisting output speed of the mode and impact of ring ingot rotating speed, and be easy to control and significantly
Improve the preparation speed of CNT flat filament；In the CNT flat filament prepared by drawing-off mode, CNT is along flat filament axial direction
Orientations, reduce the problem of directivity in use；CNT flat filament is made to be in flat by compressing/extruding,
Combination degree between its inner carbon nanotube is higher and density increases, to ensure its preferable mechanics, calorifics and electric property；Separately
Outward, so that the contact area between CNT flat filament or and resin between is increased in use, and then improve interface cohesion
Performance.
Those listed above describes illustrating of the feasibility embodiment being only for the present invention in detail, and they are simultaneously
It is not used to limit the scope of the invention, all equivalent implementations made without departing from skill spirit of the present invention or change all should
It is included within protection scope of the present invention.
Claims (10)
1. a kind of preparation method of CNT flat filament is it is characterised in that methods described includes step：
Draw CNT raw yarn bundle；
By CNT raw yarn Shu Yici half around being wrapped at least four roller bearings that linear velocity order increases, so that CNT is former
Yarn bundle is drafted；Wherein, CNT raw yarn bundle S-shaped extension between at least four roller bearings, so that at least two roller bearings can
Support the opposite sides of CNT raw yarn bundle respectively；
Obtain CNT flat filament.
2. the preparation method of CNT flat filament according to claim 1 is it is characterised in that described step " draws carbon to receive
Mitron raw yarn bundle " includes：
CNT raw yarn bundle is drawn with constant speed, and controls the diameter of CNT raw yarn bundle to be consistent.
3. the preparation method of CNT flat filament according to claim 1 is it is characterised in that described step " obtains carbon to receive
Mitron flat filament " includes：
By compression roller to the CNT raw yarn Shu Jinhang extrusion process after drafted；
Obtain CNT flat filament.
4. a kind of preparation method of CNT flat filament is it is characterised in that methods described includes step：
Draw CNT raw yarn bundle；
By CNT raw yarn Shu Yici half around being wrapped at least four roller bearings that linear velocity order increases, so that CNT is former
Yarn bundle is drafted；
By compression roller to the CNT raw yarn Shu Jinhang extrusion process after drafted；
Obtain CNT flat filament.
5. a kind of preparation method of CNT flat filament is it is characterised in that methods described includes step：
Draw CNT raw yarn bundle；
By CNT raw yarn Shu Yici half around being wrapped at least four roller bearings and through the accommodation space a pair of compression roller
Afterwards, one end of CNT raw yarn bundle is fixed on collection axle；
Rotate roller bearing, compression roller and collect axle and control each roller bearing, compression roller and the rotating speed collecting axle, so that CNT is former
Yarn bundle remains that identical extensibility is drafted and is extruded；
Obtain being collected in the CNT flat filament collected on axle.
6. a kind of preparation facilitiess of CNT flat filament are it is characterised in that described preparation facilitiess include：
Frame；
Output shaft, is arranged in described frame and collects the aqueous raw yarn of CNT that can draw CNT raw yarn bundle；
Draw roll, including spaced apart and rotate respectively and be arranged at least four roller bearings in described frame；
Collect axle, rotate and be arranged in described frame；
Drive system, for driving roller bearing described at least four to rotate with different linear velocities respectively, so that described CNT is former
Drafted in draw roll described in yarn Shu Yu and flat to collect the described CNT of formation for driving described collection axle to rotate
Silk.
7. the preparation facilitiess of CNT flat filament according to claim 6 are it is characterised in that each described roller bearing includes phase
Two ends to setting and the groove supporting described CNT raw yarn bundle, the diameter of described groove is less than two described ends
The diameter in portion.
8. the preparation facilitiess of CNT flat filament according to claim 7 are it is characterised in that in described CNT raw yarn
On the bearing of trend of bundle, the diameter of the described groove than previous described roller bearing for the diameter of the described groove of roller bearing described in increases afterwards
2%, and described drive system drives each described roller bearing to rotate with same angular velocity.
9. the preparation facilitiess of CNT flat filament according to claim 6 are it is characterised in that described preparation facilitiess also include
Rotate respectively and be arranged at a pair of compression roller in described frame, described in a pair, between compression roller, form accommodation space, drafted after
Described CNT raw yarn bundle may pass through described accommodation space and compression roller described in a pair extrudes.
10. a kind of CNT flat filament is it is characterised in that described CNT flat filament passes through as any one of claim 1 ~ 5 institute
The preparation method stated is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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