CN104294434A - Spring-shaped carbon nano tube fiber and preparing method and purpose thereof - Google Patents
Spring-shaped carbon nano tube fiber and preparing method and purpose thereof Download PDFInfo
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- CN104294434A CN104294434A CN201410374822.6A CN201410374822A CN104294434A CN 104294434 A CN104294434 A CN 104294434A CN 201410374822 A CN201410374822 A CN 201410374822A CN 104294434 A CN104294434 A CN 104294434A
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/04—Dry spinning methods
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
Abstract
The invention belongs to the field of nanotechnology and particularly relates to a spring-shaped carbon nano tube fiber and a preparing method and a purpose thereof. A height-orientation spinnable carbon nano tube array is synthesized through a vapor deposition method. Primary carbon nano tube fibers are obtained through a twisting technology, ten primary carbon nano tube fibers are arrayed into a strand, twisting is further carried out, and the spring-shaped carbon nano tube fiber is obtained. The spring-shaped carbon nano tube fiber is provided with a plurality of nanoscale and micron-scale spiral pipeline structures, knotting and self winding cannot happen, the fiber has high tensile strain, high mechanical strength and great conductivity. The fiber has rotating and contracting response to a volatile solvent and vapor at the same time, rotating response is quick, rotating speed is high, the number of rotating circles is large, the twisting moment is high, contracting response is quick, contracting force is large, and rotating and contracting response repeatability is good. The spring-shaped carbon nano tube fiber can be used for solvent driving, energy converting, intelligent fabric, device sensing and the like.
Description
Technical field
The invention belongs to field of nanometer technology, be specifically related to a kind of spring-like carbon nano-tube fibre and its production and use.
Background technology
Environment sensitive deformable material is with a wide range of applications in fields such as driving element, sensing device, artificial-muscle and intelligent robots.Wherein, the environmental stimuluses such as temperature, pH, humidity, illumination and solvent are had to the sensitive material of deformation response, as aquogel, liquid crystal polymer and shape memory high molecule etc., cause the extensive concern of educational circles and industrial quarters, and achieve series of active progress.This kind of synthesized polymer material generally has the advantage of high response deformation, but its slower speed of response, less response stress and single uncontrollable deformation response, significantly limit their practical application.
Because the one-dimensional nano structure of uniqueness and excellent mechanics, electricity and thermal property, CNT is widely studied as a class high-performance nano material, has broad application prospects.CNT is assembled into macrostructure, as fiber, film etc., is the important means expanding its application.Wherein, carbon nano-tube fibre becomes a very important research direction.Carbon nano-tube fibre is made up of the CNT of thousands of helical arrangement vertically, there is the advantages such as high-specific surface area, strong mechanical performance, high connductivity characteristic, and to a lot of solvent, there is good wettability, such material has a good application prospect in intellectual material field.
Summary of the invention
The object of the invention is to solve traditional environment sensitive material to problems such as the slower speed of response, less response stress and single uncontrollable deformation responses that environmental stimulus deformation response exists, provides a kind of and has the rotation of Rapid reversible and the spring-like carbon nano-tube fibre of systole response and its production and use to volatile solvent or steam.
The present invention's carbon nano pipe array that chemically vapour deposition process synthesizes directly spins elementary carbon nano-tube fibre; Carry out spiral by twisting process to many primary filaments to construct, be prepared into spring-like carbon nano-tube fibre; This fiber has volatile solvent and steam simultaneously and rotates and systole response, and its rotation response is fast, and rotating speed is high, and rotating cycle is large, and torsional moment is large; Its systole response is rapid, and convergent force is large; Rotate with systole response reproducible.
The preparation method of spring-like carbon nano-tube fibre of the present invention, concrete steps are:
(1) carbon nano pipe array of spinning is can be used for by chemical vapour deposition technique synthesis;
(2) dry spinning obtains elementary carbon nano-tube fibre;
(3) many primary filaments are twisted further, obtain spring-like carbon nano-tube fibre.
In step of the present invention (2), the rotating speed of described dry spinning sample stage is 0-10000 with the ratio of collection cylinder rotating speed, and the ratio of preferred rotating speed is 1-2000, and more preferably the ratio of rotating speed is 10-1000.
In step of the present invention (3), the quantity of described elementary carbon nano-tube fibre is greater than 1, and length is greater than 1 cm, and during twisting, the rotating speed of motor is greater than 1 r/min; The quantity of preferred elementary carbon nano-tube fibre is 5-100, and length is 2-50 cm, and during twisting, the rotating speed of motor is 5-300 r/min; More preferably the quantity of elementary carbon nano-tube fibre is 5-50, and length is 5-20 cm, and during twisting, the rotating speed of motor is 50-500 r/min.
In the above-mentioned spring-like fibers prepared by the present invention, the spiral angle of elementary carbon nano-tube fibre is 0-45 °, preferred spiral angle is 15-45 °, and this spring-like fibers inside exists abundant nanometer and the multistage hole of micro-meter scale, provides large quantity space for solvent infiltrates; Spring-like fibers Stability Analysis of Structures, does not occur from being wound around, and has good mechanical strength and flexibility; Spring-like fibers has rotation and the systole response of Rapid reversible for volatile solvent and steam.
Above-mentioned spring-like carbon nano-tube fibre prepared by the present invention, its inside has a large amount of nanoscale and micron-sized pipeline; Due to the capillarity of multi-stage pipeline, such spring-like fibers has for volatile solvent and steam the rotation and systole response that quick, reversible and heavily stressed (rotation) export; Rotate with systole response reproducible.Specifically, above-mentioned spring-like carbon nano-tube fibre, when contact volatile solvent or steam, rotate and contraction, after solvent evaporates, fiber recovery is to original state, and this process can repeat more than 50 times and significantly not decay simultaneously.Such material can be applicable to solvent and responds driving fast, prepares sensing device, prepares energy conversion device, prepares the fields such as intelligent response fabric.
the invention has the advantages that:
There is a large amount of nanoscale and micron-sized pipeline in spring-like carbon nano-tube fibre inside, provide the space that volatile solvent infiltrates, by the capillarity of multi-stage pipeline, spring-like fibers creates systole response (response time <45 ms) very fast when solvent infiltrates, convergent force reaches 1.5 MPa, is 15 times of nature Skeletal Muscle Contraction power; Rotation response is rotated the number of turns and is reached 2050 r/m, is 10 based on piezoelectric ceramics and conducting polymer torsion device revolution
4doubly, rotating speed reaches every meter of 6361 r/min, and initial torsional moment reaches 0.63 Nm/kg, close with business-like motor; This contraction and rotation response have good repeatability; Solve the problems such as conventional synthesis high score subclass environmental response the material slower speed of response, less response stress and single uncontrollable deformation response.This method preparation is simple, can apply to prepare various high performance environment-responsive deformable material.In addition, this spring-like carbon nano-tube fibre has good application prospect in fields such as solvent driving, power conversion and sensing devices.
Accompanying drawing explanation
Fig. 1. spring-like carbon nano-tube fibre is to the contraction of solvent and rotate response schematic diagram.
Fig. 2. carbon nano pipe array can be spun and prepare elementary carbon nano-tube fibre device schematic diagram.
Fig. 3. the preparation process schematic diagram of spring-like carbon nano-tube fibre.
Fig. 4. the electromicroscopic photograph of spring-like carbon nano-tube fibre.Wherein, (a-c) spring-like carbon nano-tube fibre Morphology in twisting process; (d-f) the SEM photo of the different amplification of spring-like carbon nano-tube fibre.
Fig. 5. spring-like carbon nano-tube fibre is to the contraction of ethanol and rotate response sign.Wherein, the contraction after (a) spring-like fibers contact ethanol and return curve; The systole response power of (b) spring-like fibers to ethanol and the relation at primary helix angle; The systole response power of (c) spring-like fibers to ethanol and the relation of cycle-index; D rotating cycle that () left-handed spring shape cellulose ethanol drives, rotating speed and the relation of time (rotating speed is converted into every meter); The rotation response of (e) spring-like fibers to ethanol and the relation of cycle-index; Contraction and the relation of rotation response with concentration of alcohol in the ethanol water contacted of (f) spring-like fibers.
Fig. 6. spring-like carbon nano-tube fibre is used for Sensitive Apparatus diagram.Wherein, (a, b) is left-handed to be placed in carrene liquid level on to the contraction of solvent vapour and elongation DEFORMATION RESPONSE schematic diagram (c) by the spring of left-handed spring shape fibre architecture with the dextrorotation spring-like fibers left-handed spring that HEAT SETTING obtains respectively,
don the impact of contraction deformation; In (d) water, ethanol, acetone and dichloromethane solvent steam left-handed spring contraction deformation ratio with
drelation; E () exists
dthe repeatability of DEFORMATION RESPONSE is shunk during=4.5 cm.
Fig. 7. spring-like carbon nano-tube fibre illustrates for the preparation of energy conversion device.Wherein, (a) spring-like carbon nano-tube fibre is for the preparation of alternating current generator schematic diagram; Output current-the time graph of generator after (b) spring-like carbon nano-tube fibre contact ethanol; The enlarged drawing of (c) Fig. 7 (b) grey area.
Fig. 8. spring-like carbon nano-tube fibre is used for smart fabric diagram.Wherein, the schematic diagram of the quick response experiment of the smart fabric that is woven into of (a) spring-like fibers; B () fiber mid point lifting height and the rate of climb are to the relation of time; The optics of (c, d) smart fabric and SEM photo; (e-h) photo that a quality is the copper bead of 240 mg is lifted after smart fabric contact ethanol.
Detailed description of the invention
Spring-like carbon nano-tube fibre is by many elementary carbon nano-tube fibre twisting preparations, and elementary CNT is prepared by dry spinning.First can spin carbon nano pipe array to be synthesized by chemical vapour deposition technique, array is fixed on rotatable sample platform, therefrom pulls out carbon nanotube stripes, is fixed on collection cylinder (as Fig. 2).The motor opening sample stage and cylinder obtains primary helix carbon nano-tube fibre.
Be 1 cm when spinning carbon nano-pipe array column width, sample stage rotating speed is 0 r/min, and drum rotation speed is 0-10 r/min, and infiltrates process with ethanol, and can obtain helical angle is 0 °, and diameter is the elementary carbon nano-tube fibre of 15-20 μm; Other conditions are constant, and adjustment sample stage rotating speed is 2000 r/min or 3500 r/min, and can obtain helical angle is respectively 32 ° and 45 °, and diameter is the elementary carbon nano-tube fibre of 15-20 μm.
Be 20cm by 20 length, primary helix angle be 32 ° elementary carbon nano-tube fibre one-tenth arranged in parallel one, one end is fixed on the axle of an electric rotating machine, the other end is fixed on moveable scraps of paper, it is twisted (as Fig. 3), when being twisted to certain revolution, obtain spring-like carbon nano-tube fibre, wherein the rotating speed of motor is 200 r/min.In twisting process, stress point is created after many primary filaments twist into one, the circulus forming spring-like is started at stress point place, along with continuous twisting, this circulus expands to whole fiber (as Fig. 4) gradually, finally obtain length and be about 4 cm, diameter is about the spring-like carbon nano-tube fibre of 110 μm.There is a large amount of nanoscale and micron-sized pipeline in its inside, the infiltration for solvent provides large quantity space, and this fiber has good mechanical property and flexibility simultaneously, and fibre structure is stablized, and can not occur from being wound around.
Be 20 cm by 5 length, to be that the elementary carbon nano-tube fibre of 32 ° is parallel line up one at primary helix angle, and can twist according to the method described above and obtain diameter and be about 25 μm, length is about the spring-like carbon nano-tube fibre of 4 cm, there is a large amount of nanoscale and micron-sized pipeline in this fibrous inside, have good mechanical property and flexibility, fibre structure is stablized, and can not occur from being wound around.
Be 20 cm by 100 length, to be that the elementary carbon nano-tube fibre of 32 ° is parallel line up one at primary helix angle, and can twist according to the method described above and obtain diameter and be about 500 μm, length is about the spring-like carbon nano-tube fibre of 4 cm, there is a large amount of nanoscale and micron-sized pipeline in this fibrous inside, have good mechanical property and flexibility, fibre structure is stablized, and can not occur from being wound around.
Be 5 cm by 20 length, to be that the elementary carbon nano-tube fibre of 32 ° is parallel line up one at primary helix angle, and can twist according to the method described above and obtain diameter and be about 110 μm, length is about the spring-like carbon nano-tube fibre of 1 cm, there is a large amount of nanoscale and micron-sized pipeline in this fibrous inside, have good mechanical property and flexibility, fibre structure is stablized, and can not occur from being wound around.
Be 100 cm by 20 length, to be that the elementary carbon nano-tube fibre of 32 ° is parallel line up one at primary helix angle, and can twist according to the method described above and obtain diameter and be about 110 μm, length is about the spring-like carbon nano-tube fibre of 20 cm, there is a large amount of nanoscale and micron-sized pipeline in this fibrous inside, have good mechanical property and flexibility, fibre structure is stablized, and can not occur from being wound around.
Be 20 cm by 20 length, primary helix angle is respectively 0 °, 8 °, 16 °, 32 °, the primary helix carbon nano-tube fibre of 45 ° is twisted respectively and is obtained corresponding spring-like carbon nano-tube fibre, its diameter and length are all close, are about 110 μm and 4 cm respectively; Primary helix angle before and after twisting is unchanged; Fracture strength is about 78 MPa respectively, 138 MPa, 146 MPa, 212 MPa, 164 MPa; Elongation at break increases successively, is respectively: 130%, and 209%, 225%, 242%, 289%.All there is a large amount of nanoscale and micron-sized pipeline in its inside, has good mechanical property and flexibility, and fibre structure is stablized, and can not occur from being wound around.
Be 20 cm by 20 length, to be that the elementary carbon nano-tube fibre of 32 ° is parallel line up one at primary helix angle, and the rotating speed of twisting motor is respectively 50 r/min, during 200 r/min and 500 r/min, time needed for preparation spring-like carbon nano-tube fibre is respectively 30 min, 8 min and 3 min.
The present invention reports a kind of to solvent and steam spring-like carbon nano-tube fibre with quick rotation and systole response and its production and use.There is abundant nanometer and the multistage hole of micro-meter scale in the spring-like fibers inside obtained by the present invention, provides large quantity space for solvent infiltrates; Spring-like fibers Stability Analysis of Structures, does not occur from being wound around, and has good mechanical strength and flexibility; There is very high elongation strain and mechanical strength and good electric conductivity.This fiber has volatile solvent and steam simultaneously and rotates and systole response, and its rotation response is fast, and rotating speed is high, and rotating cycle is large, and torsional moment is large; Its systole response is rapid, and convergent force is large; Rotate with systole response reproducible.
embodiment 1 spring-like carbon nano-tube fibre is realizing the application in fast driving response
The invention process spring-like carbon nano-tube fibre is to the contraction of ethanol and rotation response.Be 1 cm by length, primary helix angle is that the two ends of the left-handed spring shape carbon nano-tube fibre of 32 ° are clamped on two chucks of universal tensile testing machine, applying with the stress of 1.5 MPa, recording when crossing twisted fibers contact ethanol drop the convergent force now produced.
Fig. 5 (a) shows that spring-like fibers is after contact ethanol drop 0.5 s, and its convergent force just reaches 1.0 MPa, embodies systole response fast; Fig. 5 (b) shows that spring-like fibers convergent force when helical angle is 32 ° reaches maximum 1.5 MPa, and this shrinkage stress is 15 times of nature Skeletal Muscle Contraction stress; Fig. 5 (c) shows that this systole response has good repeatability, and after loop test 30 times, the convergent force of generation is without obvious decay.
In order to test the rotation response of twisted fibers, the bottom of to be the left-handed primary helix angle of 2 cm the be spring-like of 32 ° crosses twisted fibers that the rectangle copper sheet being 75 mg by one piece of quality is fixed on length, copper sheet is fixed a length be 1.2 cm double-colored paper slip in order to record fiber rotate the number of turns, the rotation of paper slip is by high-speed digital camera (400 frames/second) record.By analyzing frame by frame, the angle of rotation can by formula
θ=90
oarcsin (
d/
l) calculate, get the half of paper slip length
lbe 6 mm,
dfor the length that blue paper slip projects, revolution, rotating speed and the relation of time can be obtained to its analyzing and processing.Fig. 5 (d) shows that left-handed spring shape fiber reaches 2050 r/m to the rotation number of turns that ethanol responds, and is 10 based on piezoelectric ceramics and conducting polymer torsion device revolution
4doubly; When suspension weight quality is 570 times of spring-like carbon nano-tube fibre itself, the process of turning clockwise can reach the rotating speed of every meter of 6361 r/min; In the impregnation process of ethanol, the initial torsional moment that spring-like crosses twisted fibers reaches 0.63 Nm/kg, close with business-like motor; Fig. 5 (e) shows that its rotation response has preferably back and forth invertibity, proves that spring-like is crossed twisting carbon nano-tube fibre and had stable structure; Fig. 5 (f) shows that this spring-like fibers is when contacting the ethanol water drop of variable concentrations, produces contraction in various degree and rotation response.Along with the rising of concentration of alcohol, convergent force becomes large, rotates the number of turns and becomes many.In addition, change the hand of spiral of elementary carbon nano-tube fibre, its direction of rotation can be changed.Such as, constructed the spring-like carbon nano-tube fibre that obtains by the elementary carbon nano-tube fibre of dextrorotation when solvent contact or steam, counterclockwise rotation response can be produced.
To sum up show, such spring-like carbon nano-tube fibre has volatile solvent and steam simultaneously and rotates and systole response, and its rotation response is fast, and rotating speed is high, and rotating cycle is large, and torsional moment is large; Its systole response is rapid, and convergent force is large; Rotate with systole response reproducible.Show that this fibrid has good application prospect in fields such as intelligent drives and responsive materials preparations.
the application of embodiment 2 spring-like carbon nano-tube fibre in sensing device
Spring-like carbon nano-tube fibre is determined by the hand of spiral of carbon nano-tube fibre elementary in spring-like fibers to rotation direction in the rotation response of solvent and steam, left-handed produce respectively with dextrorotation spring-like fibers clockwise with counterclockwise rotation.Have and left-handedly can prepare corresponding left-handed spring respectively further by hot wet setting method with the spring-like carbon nano-tube fibre of right-handed chirality.Above-mentioned two kinds of springs can produce diametrically opposite contraction respectively to solvent or steam and respond, as Fig. 6 (a, b) with elongation.
Shape the spring that obtains by one when the liquid level of carrene liquid by left-handed spring shape fiber, and spring produces significant contraction, this be by the contraction of left-handed spring shape fiber self with rotate clockwise coefficient result; Be wound around the spring obtained by dextrorotation spring-like fibers and carrene steam produced to the response of extending deformation, rotation response (the making spring elongates) contribution to camber of spring indicating dextrorotation spring-like fibers is greater than systole response (spring is shortened).
If Fig. 6 (c) is along with the reduction of left-handed spring and solvent liquid level distance, the contraction deformation of spring constantly increases, and in distance, liquid level 6 cm place is reaching maximum collapse deformation 59%.
As this systole response of Fig. 6 (d) susceptibility to the solvent that uses or steam have selective.Such as this spring is to the response of steam ungauged regions, and control spring distance liquid level sustained height investigates its systole response to ethanol, acetone, carrene successively, and the susceptibility of response then rises successively.
As this contraction of Fig. 6 (e) has good repeatability simultaneously, investigate left-handed spring distance liquid level 4.5 cm for ethanol and repeat 50 systole response, deformation degree is without obvious decline
Be wound around by spring-like carbon nano-tube fibre the left-handed spring obtained and there is the DEFORMATION RESPONSE stimulated solvent vapour, different solvents is had to the response of different sensitivity; Elongating or shortening of its DEFORMATION RESPONSE, depends on and the left-handed of spring-like fibers or right-handed spiral configuration, has good controllability.Show that this spring-like carbon nano-tube fibre has good application potential in sensing device field.
the application of embodiment 3 spring-like carbon nano-tube fibre in power conversion
Have quick and reversible rotation response in view of spring-like carbon nano-tube fibre infiltrates ethanol, it is the ac power generation of drive source that the present invention constructs with spring-like fibers, and rotation function is converted into electric energy.
As shown in Figure 7 (a), make the copper coil that a diameter is 1.3 cm, 150 circles by oneself, connect length be 4 cm by 50 helical angles be 32 ° primary filament synthesize left-handed spring shape carbon nano-tube fibre lower end, one block of bar magnet is placed near copper coil, one extremely near coil, uses during the table record spring-like carbon nano-tube fibre contact ethanol spraying of Keithley 2400 source and rotates the alternating current produced.Have benefited from the electric conductivity of carbon nano-tube fibre excellence, this spring-like carbon nano-tube fibre while as drive source, also serves the effect of wire.
When left-handed spring shape crosses twisting carbon nano-tube fibre contact ethanol spraying, fiber there occurs clockwise fast rotational, and after ethanol volatilization, fiber is rotated counterclockwise reply, creates alternating current in this process.By Fig. 7 (b, c), in the process, fiber has turned clockwise 9 circles, has replied 7 circles counterclockwise, back and forth roughly the same, and the less reason of fiber rotating cycle may to connect the restriction of copper band wire relevant with outside.The fiber occurred at ethanol impregnation process turns clockwise in process, and generator creates the maximum current of 0.11 mA.Show thus, this spring-like carbon nano-tube fibre can be used for preparing novel energy conversion device.
the application of embodiment 4 spring-like carbon nano-tube fibre in smart fabric
Respond in view of this spring-like fibers has good intensity, flexibility and the rapid desufflation to solvent and steam, with the fibrage of left-handed spring shape, fiber spacing is about the smart fabric of 1 mm, as Fig. 8 (c, d) in the present invention.Due to the rapid desufflation response that solvent drives, be sprayed at by ethanol after on this fabric, what exceed the own quality of fabric 100 times is heavily that the copper bead of 240 mg has been lifted 4.5 mm, and this response time can reach Millisecond, as Fig. 8 (e, f).In 50 initial ms, the merit that this smart fabric creates 49 W/kg exports, and this exports (50 W/kg) with the merit of mammalian bone flesh identical.
The smart fabric that the braiding of this spring-like carbon nano-tube fibre is formed, to solvent and steam fast response time, has higher power output simultaneously, is expected to be applied in intelligent drives device field.
Claims (10)
1. a preparation method for spring-like carbon nano-tube fibre, is characterized in that step is specially:
(1) carbon nano pipe array of spinning is can be used for by chemical vapour deposition technique synthesis;
(2) dry spinning obtains elementary carbon nano-tube fibre;
(3) many primary filaments are twisted further, obtain spring-like carbon nano-tube fibre.
2. preparation method according to claim 1, it is characterized in that: in step (2), the rotating speed of described dry spinning sample stage is 0-10000 with the scope of the ratio of collection cylinder rotating speed.
3. preparation method according to claim 1, it is characterized in that: in step (2), the rotating speed of described dry spinning sample stage is 0-10000 with the ratio of collection cylinder rotating speed.
4. preparation method according to claim 1 or 2, is characterized in that: in step (3), and the quantity of described elementary carbon nano-tube fibre is greater than 1, and length is greater than 1 cm, and during twisting, the rotating speed of motor is greater than 1 r/min.
5. preparation method according to claim 4, it is characterized in that: in step (3), the quantity of described elementary carbon nano-tube fibre is 5-100, and length is 2-50 cm, and during twisting, the rotating speed of motor is 5-300 r/min.
6. the spring-like carbon nano-tube fibre obtained by the preparation method one of claim 1-5 Suo Shu, is characterized in that: such spring-like carbon nano-tube fibre has a large amount of nanoscale and micron-sized pipeline; Due to the capillarity of multi-stage pipeline, such spring-like fibers has rotation and the systole response of quick, reversible and heavily stressed output for volatile solvent and steam; Rotate with systole response reproducible.
7. spring-like carbon nano-tube fibre as claimed in claim 6 is realizing the application in response driving fast.
8. spring-like carbon nano-tube fibre as claimed in claim 6 is preparing the application in sensing device.
9. spring-like carbon nano-tube fibre as claimed in claim 6 is preparing the application in energy conversion device.
10. spring-like carbon nano-tube fibre as claimed in claim 6 is preparing the application in intelligent response fabric.
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