Electro-mechanical feedback carbon nanotube thin film orientation drawing reinforcement device and method

Abstract

The application discloses an electric-power feedback carbon nanotube film orientation stretching strengthening device and method, and relates to the technical field of nanometer materials. The device comprises a loading device, an online monitoring device, a power supply and a carbon nanotube film to be measured. The loading device is provided with a clamp, and electrodes are arranged at the two ends of the clamp. The clamp is used for clamping the carbon nanotube film to be measured. The online monitoring device, the power supply and the electrodes are connected by wires respectively, and the carbon nanotube film to be measured is heated. The loading device is used for providing an axial stretching force to the carbon nanotube film to be measured, so that the carbon nanotube film to be measured is stretched along the force direction. The online monitoring device is used for monitoring the current value of the carbon nanotube film to be measured during the stretching process, so as to control the stretching deformation of the carbon nanotube film to be measured. The carbon nanotube film is filled with a high polymer in the surface and the interior, and the orientation, the mechanical and electrical properties of the carbon nanotube film can be greatly improved through multiple stretching.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of nanomaterials, and particularly relates to an electric-force feedback carbon nanotube film orientation stretching reinforcement device and method. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] The strength of carbon nanotubes at the microscale exceeds that of most engineering materials, but its strength at the macro level is far lower than that at the microscale, because the internal arrangement of the carbon nanotube bundle film is loose and the orientation is poor. In use, each carbon nanotube bundle functions independently, and the force between the bundles is weak, making it difficult to realize the integrity of the carbon nanotube material. The carbon nanotube bundle is observed to be fibrous under an electron microscope, which clearly shows that the film made of carbon nanotubes has better mechanical and electrical properties in the direction of fiber orientation, that is, the tensile strength is stronger than that in the transverse direction, and the electrical conductivity is greater. Carbon nanotube orientation is an effective way to improve the mechanical and electrical properties of carbon nanotubes.

[0004] The inventor found that the floating catalytic chemical vapor deposition method is the most effective method for preparing a meter-scale large-size carbon nanotube film (Patent No. CN202110196983.0), but the orientation of the film prepared by this method is poor, and the mechanical and electrical strength of the film has a lot of room for improvement. The inventor also found that the currently used carbon nanotube film orientation methods are mostly mechanical side pressure, drawing, rolling and other physical methods, which improve the density of the film and enhance the bonding degree between the carbon nanotube bundles, thereby improving the strength and electrical conductivity. However, due to the small thickness of the carbon nanotube film itself, the performance improvement through density enhancement is relatively small. SUMMARY

[0005] The present application aims to provide an electric-force feedback carbon nanotube film orientation stretching reinforcement device and method, which fills the surface and interior of the carbon nanotube film with a high molecular polymer, and can greatly improve the orientation and mechanical and electrical properties of the carbon nanotube film through multiple stretching, thereby solving the problems in the prior art.

[0006] To solve the above technical problems, the present application is realized by the following technical scheme:

[0007] The present application provides an electric-force feedback carbon nanotube film orientation stretching reinforcement device in the first aspect.

[0008] The application discloses an electric-power feedback carbon nanotube film orientation stretching reinforcement device, which comprises a loading device, an online monitoring device, a power supply and a carbon nanotube film to be measured.

[0009] Preferably, a support plate is arranged between the clamp and the carbon nanotube film to be measured.

[0010] Preferably, an insulating material is arranged between the clamp and the loading device.

[0011] Preferably, the carbon nanotube film to be measured contains a certain concentration of high molecular polymer, and the stress direction of the carbon nanotube film to be measured during stretching is consistent with the collection orientation direction of the carbon nanotube film to be measured.

[0012] The application discloses an electric-power feedback carbon nanotube film orientation stretching reinforcement device, which comprises a loading device, an online monitoring device, a power supply and a carbon nanotube film to be measured.

[0013] The application discloses an electric-power feedback carbon nanotube film orientation stretching reinforcement device, which comprises a loading device, an online monitoring device, a power supply and a carbon nanotube film to be measured.

[0014] Step one: an experimental sample of carbon nanotube film containing a certain concentration of high molecular polymer is prepared, and the carbon nanotube film to be measured is obtained by cutting and sampling, wherein the length direction of the carbon nanotube film to be measured, i.e. the stress direction during subsequent stretching, is consistent with the collection orientation direction of the carbon nanotube film to be measured.

[0015] Step two: the carbon nanotube film to be measured is fixed on the clamp of the electric-power feedback carbon nanotube film orientation stretching reinforcement device.

[0016] Step three: the power supply is turned on, and the temperature of the carbon nanotube film to be measured continuously rises.

[0017] Step four: after the carbon nanotube film to be measured reaches a set temperature, the set temperature depends on the type of high molecular polymer, the loading device is started to stretch the carbon nanotube film to be measured, and the online monitoring device monitors the collected current data in real time during the stretching process.

[0018] Step five: stop heating and stretching when the rate of change of current data exceeds the set range, and gradually reduce the temperature of the test film to room temperature;

[0019] Step six: repeat steps three to five until the maximum stretch of the test carbon nanotube film is reached.

[0020] Preferably, the step two specifically includes:

[0021] Fix the electrode on the clamp and connect the lead wire to the online monitoring device and the power supply;

[0022] Connect and fix the insulating material with the clamp and the loading device respectively;

[0023] Wrap the support plate around the two ends of the test carbon nanotube film, and then bond and fix the test carbon nanotube film with the support plate;

[0024] Keep the support plate parallel to the loading direction, clamp the bonding part of the test carbon nanotube film and the support plate with the clamp, and finally connect the electrode and the online monitoring device with the lead wire.

[0025] Preferably, in the step three, the temperature of the test carbon nanotube film is controlled below the glass transition temperature of the polymer material by controlling the current.

[0026] Preferably, in the step four, the stretching rate range is set between 1mm / min and 5mm / min.

[0027] Preferably, the step five specifically includes:

[0028] Stop the deformation and turn off the power supply when the rate of change of current data exceeds the set range, and the carbon nanotube film stops heating and gradually cools down;

[0029] The stretching clamp remains in the same position, and the stretching movement of the loading device stops until the temperature of the test film decreases to room temperature;

[0030] Remove the load.

[0031] Preferably, before the step one, it also includes:

[0032] Use the floating catalytic chemical vapor deposition method to prepare the carbon nanotube film;

[0033] Spray the polymer solution on the surface of the carbon nanotube film to prepare the polymer / carbon nanotube composite film;

[0034] Unfold the polymer / carbon nanotube composite film and slowly dry it in a windless environment to obtain the carbon nanotube film experimental sample containing a certain concentration of polymer.

[0035] The present application has the following advantages:

[0036] 1. The present application provides a kind of electro-mechanical feedback carbon nanotube film orientation strengthening method and device, by filling polymer in the surface and inside of carbon nanotube film, the binding strength between carbon nanotube bundle in the film is improved by using its adhesive effect, so as to improve the mechanical strength and ductility of carbon nanotube film.

[0037] 2. In the drawing process of carbon nanotube / polymer composite film, voltage is applied at both ends, due to the self-resistance effect of carbon nanotube film, Joule heat is generated, and the flowability of polymer material is enhanced under the action of thermal effect, which can play a role in restraining and guiding carbon nanotube bundle in the drawing deformation of carbon nanotube film, and increase the ductility of carbon nanotube film.

[0038] 3. In the drawing process, the electrical signal of carbon nanotube film is monitored in real time by using current / resistance tester, when the signal fluctuates greatly, it indicates that defects begin to appear in the carbon nanotube film, if the drawing continues, the film may be broken, at this time, stop drawing deformation (keep the position unchanged), turn off the power, the temperature of carbon nanotube film decreases, and the polymer material in it solidifies, so as to maintain the orientation state of carbon nanotube bundle in the film and fill the defects in the film caused by drawing. After the polymer material is cooled and solidified, repeat the above steps, and thus the orientation, mechanical and electrical properties of carbon nanotube film can be greatly improved after multiple drawing.

[0039] 4. In the present application, electrodes are added at both ends of the clamp, and wires are used to connect current, resistance tester and power supply, so as to observe the electrical feedback signal while improving the orientation of polyvinyl alcohol / carbon nanotube composite film during drawing, control the drawing deformation amount to prevent irreversible defects in the film caused by excessive drawing deformation and structural damage.

[0040] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed for the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0042] Figure 1 It is a schematic diagram of the overall structure of embodiment one;

[0043] Figure 2 Figure 3 is a schematic diagram of the power supply and the on-line monitoring device connected in the embodiment 2;

[0044] Figure 3 Figure 4 is a schematic diagram of the support plate and the thin film to be tested in the embodiment 2;

[0045] Figure 4 Figure 5 is a schematic diagram of the support plate being cut off on both sides before the formal drawing in the embodiment 2;

[0046] Figure 5 Figure 6 is a flow chart of the process in the embodiment 2;

[0047] Figure 6 Figure 7 is a microstructure diagram of the carbon nanotube thin film without drawing treatment in the embodiment 2;

[0048] Figure 7 Figure 8 is a microstructure diagram of the carbon nanotube thin film after drawing treatment using the method in the embodiment 2;

[0049] Figure 8 Figure 9 is a comparison diagram of the tensile strength of the carbon nanotube thin film before and after drawing treatment.

[0050] In the drawings, the components represented by each reference numeral are listed as follows: 1 loading device, 2 on-line monitoring device, 3 power supply, 4 clamp, 5 wire, 6 carbon nanotube thin film to be tested, 7 support plate, 8 insulating material. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0052] An electric-force feedback carbon nanotube thin film orientation drawing strengthening device comprises a loading device 1, an on-line monitoring device 2 and a power supply 3. The loading device 1 is provided with a clamp 4, and the clamp 4 is provided with electrodes at both ends. The clamp 4 is used for clamping a carbon nanotube thin film 6 to be tested. The on-line monitoring device 2 and the power supply 3 are respectively connected with the electrodes by wires 5, and the carbon nanotube thin film 6 to be tested is heated. The loading device 1 is used for providing an axial drawing force to the carbon nanotube thin film 6 to be tested, so that the carbon nanotube thin film 6 to be tested is stretched along the force direction. The on-line monitoring device 2 is used for monitoring the current value of the carbon nanotube thin film 6 to be tested during the force stretching process, so as to control the stretching deformation amount of the carbon nanotube thin film 6 to be tested. When the sudden change amount of the current value exceeds a preset limit value, the stretching and heating are stopped.

[0053] Further, a support plate 7 is arranged between the clamp 4 and the carbon nanotube film 6 to be tested, and the support plate 7 is used to wrap the carbon nanotube film 6 to be tested.

[0054] Further, an insulating material 8 is arranged between the clamp 4 and the loading device 1.

[0055] Further, the carbon nanotube film 6 to be tested contains a certain concentration of polymer solution, and the stress direction of the carbon nanotube film 6 to be tested during stretching is consistent with the collection orientation direction of the carbon nanotube film 6 to be tested.

[0056] A carbon nanotube film orientation stretching and strengthening method using the above-mentioned electric-force feedback carbon nanotube film orientation stretching and strengthening device, comprising the following steps:

[0057] Step one: make a carbon nanotube film experimental sample containing a certain concentration of polyvinyl alcohol, cut and sample the carbon nanotube film to obtain the carbon nanotube film 6 to be tested, wherein the length direction of the carbon nanotube film 6 to be tested, i.e. the stress direction during subsequent stretching, is consistent with the collection orientation direction of the carbon nanotube film 6 to be tested;

[0058] Step two: fix the carbon nanotube film 6 to be tested on the clamp 4 of the above-mentioned electric-force feedback carbon nanotube film orientation stretching and strengthening device;

[0059] Step three: turn on the power supply 3, and the temperature of the carbon nanotube film 6 to be tested continues to rise;

[0060] Step four: after the carbon nanotube film 6 to be tested reaches the set temperature, which depends on the type of polymer, start the loading device 1 to stretch the carbon nanotube film 6 to be tested, and in the stretching process, the online monitoring device 2 monitors the collected current data in real time;

[0061] Step five: when the mutation rate of the current data exceeds the set range, stop heating and stretching, and gradually reduce the temperature of the film to be tested to room temperature;

[0062] Step six: repeat the above steps three to five until the carbon nanotube film 6 to be tested is stretched to the maximum stretching amount.

[0063] Further, the step two specifically comprises:

[0064] Fix the electrode on the clamp 4, and connect the online monitoring device 2 and the power supply 3 with the wire 5;

[0065] Fix the insulating material 8 with the clamp 4 and the loading device 1 respectively;

[0066] Wrap the support plate 7 around both ends of the carbon nanotube film 6 to be tested, and then bond and fix the carbon nanotube film 6 to be tested with the support plate 7;

[0067] The support plate 7 is kept parallel to the loading direction, and the adhesion between the carbon nanotube film 6 to be measured and the support plate 7 is clamped by the clamp 4, and finally the electrodes are connected to the online monitoring device 2 by the wire 5.

[0068] Further, in the step three, the temperature of the carbon nanotube film 6 to be measured is controlled by controlling the current, and the temperature is controlled below the glass transition temperature of the polymer material.

[0069] Further, in the step four, the stretching rate range is set to be between 1 mm / min and 5 mm / min.

[0070] Further, the step five specifically includes:

[0071] When the mutation rate of the current data exceeds the set range, the stretching deformation is stopped, and the power supply 3 is turned off, the carbon nanotube film stops heating, and gradually cools down;

[0072] The stretching clamp 4 keeps the position unchanged, and the stretching movement of the loading device 1 stops until the temperature of the film to be measured decreases to room temperature;

[0073] The load is removed.

[0074] Further, before the step one, it further includes:

[0075] The carbon nanotube film is prepared by using a floating catalytic chemical vapor deposition method;

[0076] The surface of the carbon nanotube film is sprayed with a polymer solution to prepare a polymer / carbon nanotube composite film;

[0077] The polymer / carbon nanotube composite film is unfolded and slowly dried in a windless environment to obtain a carbon nanotube film experimental sample containing a certain concentration of polymer.

[0078] In this embodiment, the polymer is polyvinyl alcohol.

[0079] In other embodiments, polyvinyl chloride, polyethylene, polypropylene, polyphenylene sulfide, and other polymer plastic materials can also be selected. That is, it is suitable for all thermoplastic polymer materials which are solid at low temperature and soften when heated to a certain temperature.

[0080] Embodiment one:

[0081] Please refer to Figure 1 As shown in the figure, the embodiment provides an electric-force feedback carbon nanotube film orientation strengthening device, which mainly includes a loading device 1, a film to be measured, a carbon nanotube film support plate 7, an insulating material 8, a current resistance tester, a power supply 3, and a clamp 4.

[0082] The devices and their connection modes are described as follows:

[0083] The loading device 1 is used to provide axial stretching force to the carbon nanotube film, so that the film is stretched along the force direction.

[0084] The film to be tested is a film made of polyvinyl alcohol and carbon nanotube film composite.

[0085] The carbon nanotube film support plate 7 is usually a hardboard or plastic plate. Before stretching, the two ends of the film are fixed by adhesive form, and then they are clamped together on the stretching clamp 4, which plays a role in wrapping and supporting the carbon nanotube / polyvinyl alcohol composite film. In this embodiment, before the stretching starts, the positions originally connected on both sides of the support plate 7 are cut off with scissors to avoid affecting the stress of the film, so that the support plate 7 wraps and supports the two sides of the carbon nanotube film 6 to be tested respectively.

[0086] The insulating material 8 is fixed between the clamp 4 and the stretcher, mainly playing a safety protection role to avoid the influence of electric current on the loading device 1.

[0087] In this embodiment, the online monitoring device 2 is a current and resistance tester, which is used to monitor the electrical signal feedback during the stretching of the carbon nanotube in real time.

[0088] The power supply 3 is used to provide electric energy and heat source.

[0089] The clamp 4 in this embodiment is a device for fixing the film, which can provide axial stretching force to the carbon nanotube film by pneumatic clamping or manual clamping.

[0090] Embodiment two:

[0091] Please refer to Figure 5 The embodiment provides an electric-force feedback carbon nanotube film orientation stretching and strengthening method, which specifically comprises the following steps:

[0092] 1. Material selection and sampling: select a carbon nanotube film experimental sample containing a certain concentration of polyvinyl alcohol inside according to the requirements, and cut it to the size of 50 cm x 10 cm, and complete the sampling, wherein the length direction, i.e. the stress direction during subsequent stretching, is consistent with the collection orientation direction of the carbon nanotube film.

[0093] 2. Assemble online detection equipment:

[0094] Step one: as Figure 2 shown, fix the electrode on the clamp 4, and connect the online monitoring device 2 and the power supply 3 with the wire 5;

[0095] Step two: connect and fix the insulation material 8 with the clamp 4 and the loading device 1, the insulation material 8 can be selected as an epoxy resin rod, and the connection with the clamp 4 and the loading device 1 can be achieved by threaded connection.

[0096] Step three: as shown in Figure 3 、 Figure 4 , bond the film sample to be tested with the carbon nanotube film support plate 7, and the carbon nanotube film support plate 7 needs to wrap the two ends of the film, so as to facilitate subsequent loading into the clamp 4.

[0097] Step four: ensure that the carbon nanotube film support plate 7 is parallel to the loading direction, and use the clamp 4 to clamp the support / constraint device, and the clamping position is the bonding position of the carbon nanotube film and the support / constraint device.

[0098] The operation process is as follows:

[0099] Step one: turn on the power supply 3.

[0100] Due to the large resistance of the film to be tested, the temperature of the film continues to rise under the action of current heat effect (the temperature of the film is controlled below the glass transition temperature of the polymer material by controlling the current), and the flowability of the polyvinyl alcohol in the film is enhanced after heating, which can play a lubricating and connecting role in the subsequent drawing process, thereby improving the strain limit of the film.

[0101] Step two: after the film reaches the set temperature, the loading device 1 starts to stretch the film.

[0102] The stretching rate range is set to be between 1 mm / min and 5 mm / min.

[0103] The stretching rate should not be too fast, so as to avoid that the internal structure of the film changes sharply due to too fast stretching, resulting in that the signal change collected by the online monitoring device cannot be synchronized with the actual structure change, and losing the significance of online real-time detection.

[0104] During the stretching process, the online monitoring device 2 will monitor the collected data at all times and respond when the collected electrical signal changes suddenly.

[0105] Step three: stop heating when the signal mutation rate exceeds the set range.

[0106] During the stretching process of the loading device 1 on the film to be tested, due to the improvement of the orientation of the carbon nanotube bundle in the carbon nanotube film, the electrical conductivity gradually increases, and the resistance decreases, and under the condition that the voltage is unchanged, the current increases; when the stretching deformation reaches the limit that the carbon nanotube film can withstand, a small defect is generated in the inside, the resistance / current changes suddenly, that is, the resistance suddenly increases and the current suddenly decreases, at this time, the stretching deformation is stopped, and the power supply 3 is turned off, the carbon nanotube film stops heating, and gradually cools down.

[0107] Step four: the stretching fixture 4 keeps the position unchanged, waiting for temperature reduction.

[0108] After the heating is stopped, the stretching movement of the loading device 1 is stopped until the temperature of the measured film is reduced to room temperature. The temperature of the measured film is reduced, and the polyvinyl alcohol is solidified again, which is conducive to maintaining the microstructure state of the oriented carbon nanotubes, and creates conditions for the next stage of re-heating and stretching orientation.

[0109] Step five: the load is removed, and the power-on heating and stretching orientation operation is repeated, i.e., steps two to four are repeated.

[0110] After the film is stretched once, the internal orientation is improved, and the overall mechanical strength is also improved. However, the effect of one-time stretching on the improvement of the orientation and strength of the film is limited, and repeated stretching can maximize the internal orientation and strength of the film. In the new state, the heating and stretching operation process of the film is repeated until the on-line monitoring device 2 detects the sudden change of the electrical signal again, and then the heating is stopped, and the stretching load is removed when the temperature of the measured film returns to room temperature. Repeat this process until the film is stretched to the maximum stretching amount, and the orientation of the carbon nanotube bundle in the film is improved to improve the macroscopic mechanical and electrical properties of the carbon nanotube film.

[0111] The maximum stretching amount is related to the original state of the carbon nanotube film. The more disordered the original state is, the greater the maximum stretching amount can be. Experience shows that the cumulative stretching amount is not greater than 20% after multiple times. In this embodiment, the determination of the maximum stretching amount is related to the target required, and there is no unified standard.

[0112] As shown in Figure 6 and Figure 7 , the microstructure of the carbon nanotube film after three times of repeated force and electrical feedback stretching treatment can be seen. It can be seen that the carbon nanotube bundle is changed from the disordered arrangement shown in Figure 6 to the oriented arrangement shown in Figure 7 , and the mechanical strength is also improved from 120 MPa to about 200 MPa, as shown in Figure 8 , and the electrical conductivity is improved from 0.6*10 5 S / m to 1.1*10 5 S / m.

[0113] In the description of the specification, reference to "one embodiment", "an example", "a specific example" or the like means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. The appearances of the phrases "in one embodiment", "an example", "a specific example" or the like in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0114] The preferred embodiments of the application disclosed above are only to help explain the application. The preferred embodiments do not describe all the details of the application and limit the application to the specific embodiments described. Obviously, many modifications and variations can be made in light of the contents of the specification. The specification selects and specifically describes these embodiments in order to better explain the principles and practical application of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. An electro-motive feedback carbon nanotube thin film orientation drawing strengthening method, characterized by, The application relates to an electric-force feedback carbon nanotube film orientation stretching strengthening device, which comprises a loading device, an online monitoring device, a power supply and a carbon nanotube film to be measured. The application relates to an electric-force feedback carbon nanotube film orientation stretching strengthening device, which comprises a loading device, an online monitoring device, a power supply and a carbon nanotube film to be measured. Step one: preparing a carbon nanotube film experimental sample containing a certain concentration of high polymer, cutting and sampling the carbon nanotube film to be measured, wherein the length direction of the carbon nanotube film to be measured, i.e. the stress direction during subsequent stretching, is consistent with the collection orientation direction of the carbon nanotube film to be measured; Step two: fixing the carbon nanotube film to be measured on the clamp of the electric-force feedback carbon nanotube film orientation stretching strengthening device; Step three: connecting the power supply, and continuously increasing the temperature of the carbon nanotube film to be measured; Step four: after the carbon nanotube film to be measured reaches the set temperature, starting the loading device to stretch the carbon nanotube film to be measured, and monitoring the collected current data in real time during the stretching process by the online monitoring device; Step five: when the mutation change rate of the current data exceeds the set range, stopping heating and stretching, and gradually reducing the temperature of the film to be measured to room temperature; Step six: repeating steps three to five until the carbon nanotube film to be measured is stretched to the maximum stretching amount.

2. The electro-drag carbon nanotube thin film orientation-drawing reinforcement method according to claim 1, wherein The step two specifically comprises the following steps: Fixing the electrode on the clamp, and connecting the online monitoring device and the power supply with wires; Fixing the insulating material with the clamp and the loading device; Wrapping the support plate around the two ends of the carbon nanotube film to be measured, and then bonding and fixing the carbon nanotube film to be measured with the support plate; Keeping the support plate parallel to the loading direction, clamping the bonding position of the carbon nanotube film to be measured and the support plate with the clamp, and finally connecting the electrode and the online monitoring device with wires.

3. The electro- force feedback carbon nanotube thin film orientation-draughting reinforcement method according to claim 1, characterized by, In the step three, the temperature of the carbon nanotube film to be measured is controlled by controlling the current, and the temperature is controlled below the glass transition temperature of the high polymer material.

4. The electro- force feedback carbon nanotube thin film orientation-draughting reinforcement method according to claim 1, characterized by, In the step four, the stretching rate is set to be between 1 mm / min and 5 mm / min.

5. The electro- force feedback carbon nanotube thin film orientation, drawing and strengthening method according to claim 1, characterized in that, The step five specifically comprises the following steps: When the mutation change rate of the current data exceeds the set range, stopping the stretching deformation, and closing the power supply; the carbon nanotube film stops heating and gradually cools down; The stretching clamp keeps the position unchanged, the stretching movement of the loading device stops, and the temperature of the film to be measured is reduced to room temperature; Unloading.

6. The electro-drag carbon nanotube thin film orientation-drawing reinforcement method according to claim 1, wherein Before the step one, the following steps are further included: Preparation of the carbon nanotube film by using a floating catalytic chemical vapor deposition method; Spraying a high polymer solution on the surface of the carbon nanotube film to prepare a high polymer / carbon nanotube composite film; Unfolding the high polymer / carbon nanotube composite film, and slowly drying the film in a windless environment to prepare the carbon nanotube film experimental sample containing a certain concentration of high polymer.

7. The electro- force feedback carbon nanotube thin film orientation-draughting reinforcement method according to claim 1, characterized by, The support plate is arranged between the clamp and the carbon nanotube film to be tested and is used for wrapping the carbon nanotube film to be tested.

8. The electro- force feedback carbon nanotube thin film orientation-draughting reinforcement method according to claim 1, characterized by, Insulating material is arranged between the clamp and the loading device.

9. The electro- force feedback carbon nanotube thin film orientation-draughting reinforcement method according to claim 1, characterized by, The carbon nanotube film to be tested contains a certain concentration of polymer solution, and the stress direction of the carbon nanotube film to be tested during stretching is consistent with the collection orientation direction of the carbon nanotube film to be tested.

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