CN104499354A - Carbon nano fiber paper and preparation method thereof - Google Patents
Carbon nano fiber paper and preparation method thereof Download PDFInfo
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Abstract
The invention discloses carbon nano fiber paper and a preparation method thereof. The carbon nano fiber paper disclosed by the invention is combined by carbon nano fibers by means of the Van der Waals force and the cross linking of the carbon nano fibers, and the carbon nano fibers comprise one or more of multi-wall carbon nanotubes, single-wall carbon nanotubes, solid carbon nano fibers or activated carbon fibers. The preparation process of the carbon nano fiber paper disclosed by the invention comprises the steps of dispersing, filtering, roasting and rolling. No dispersing agent is needed in the preparation process, and the carbon tubes and the carbon fibers need no functionalized treatment. The carbon nano fiber paper prepared in the invention has the advantages of large specific surface area, good electrical conductivity and high air permeability; the materials are recyclable, so that no waste is generated; and since the process is simple, mass production is liable to achieve.
Description
Technical field
The present invention relates to carbon nanomaterial technical field, particularly relate to a kind of Carbon nanofiber paper and preparation method thereof.
Background technology
CNTs is also known as Baji-tube, belong to one to there is special construction (radial dimension is 2-20nm level, axial dimension is micron dimension, pipe two ends all seal substantially) One-dimensional Quantum material, form the coaxial pipe of several layers to tens of layers primarily of the carbon atom in hexagonal array.CNTs can be divided into single wall CNTs and many walls CNTs by the graphene film number of plies.The preparation method of CNT mainly contains three kinds: 1, arc discharge method, can add packed catalyst thing in graphite material, and by the method for arc discharge, reaction zone temperature can reach 3000-4000 °, prepares CNT with this; 2, laser evaporization method, under inert gas shielding condition, utilizes the high-energy of laser to make graphite evaporate thus prepare CNT; 3, chemical vapour deposition technique, generally all claims CVD, and the method material source is extensive, and condition is relatively looser, is applicable to large-scale production.
CNT has high aspect ratio structures, there is good electric conductivity, excellent in mechanical performance, specific area is large, have larger application prospect: patent is illustrated. such as, Nature magazine ran in 1997 CNT does the research of hydrogen storage material, and US Patent No. 2005118091 and Chinese patent CN1398782 Japan Patent JP2001146408 disclose the distinct methods of hydrogen Storage in Carbon Nanotubes; 2012, J.Power Sources magazine was reported and MnO2 thick for 4nm has been coated on solid carbon nanofiber, coordinated sodium sulphate electrolyte to make high-performance super capacitor; 2010, Nature magazine has been reported and has been utilized CNT to make Anode of lithium cell by electrochemical capacitor and the combination of faraday's reaction cell, obtain high performance lithium battery, Chinese patent CN101346834 discloses a kind of carbon nano tube surface parcel nanoscalar silicon particles and is used for cathode of lithium battery; It is carbon nano-tube modified for lithium ion battery negative that Chinese patent CN1538543A discloses a kind of copper; Chinese patent CN1161182C discloses a kind of method that Carbon Nanotubes Supported Platinum Catalysts is applied to fuel cell; Composites magazine ran in 2012 utilizes carbon nano-fiber to make composite sheet for anti-lightning strike; Chinese patent CN1564296A utilizes powder metallurgical technique to prepare carbon nanotube field transmitting cold-cathode.Generally speaking, carbon nano-fiber has good application prospect on hydrogen storage material, high-performance lithium battery, ultracapacitor, fuel cell electrode, electromagnetic shielding material, field emmision material.
The present microscopic fields of premium properties multilist of CNT, and once expand macroscopic arts to, the material advantage of CNT will be made to have a huge impact, the CNT of dispersion is also difficult to realize actual application.Better solution is, by certain technological means, CNT is prepared into effective macroscopic material, does not lose the micro-property of CNT simultaneously.Carbon nanofiber paper is a kind of material that applicability is relatively many, and its technology of preparing is varied: substrate direct formation of film at surface, solution filtering coating, serigraphy film forming, layer assembly film forming, electrophoresis film forming.Due to nano-grade size and the special major diameter structure of CNT, its dispersion is very difficult, and due to the length range of CNT extensive, can run into a lot of different situations in its actual use, the CNT as shorter length is relative higher to the requirement of filter membrane.Therefore the preparation of Carbon nanofiber paper cannot realize large-scale production at present always.The production that film material has had scale at present prepared by carbon fiber in same type of material, but the thickness of its film material is relatively large, and minimum all wants hundreds of micron.By comparison, the little and electric conductivity of Carbon nanofiber paper thickness is far beyond carbon-fiber film.In addition, Chinese patent CN103015256A discloses a kind of method preparing Carbon nanofiber paper, but needs to carry out finishing in advance to carbon nano-fiber, introduces functional group.Such one side increases cost, and carbon nano molecular easily produces polarization on the other hand, makes electric conductivity influenced, thus reduces the performance of carbon nano-fiber.Domestic and all do not have suitable batch prepare Carbon nanofiber paper and the method for surface preparation need not be carried out in the world at present.The large-scale production realizing Carbon nanofiber paper under how accomplishing low cost situation is a difficult problem for a long time.
Summary of the invention
Technical problem to be solved by this invention is to provide that a kind of cost is low, operation is few, purity is high, convenient transfer and Carbon nanofiber paper of suitable for mass production and preparation method thereof; Be cross-linked with each other between carbon nano-fiber, entangled with one another, structure is relatively loose, therefore large, the good conductivity of Carbon nanofiber paper specific area.
For solving the problems of the technologies described above, the invention provides a kind of Carbon nanofiber paper, combined by the crosslinked action relied between carbon nano-fiber between molecule Van der Waals force and carbon nano-fiber and form, described carbon nano-fiber comprises one or more in multi-walled carbon nano-tubes, Single Walled Carbon Nanotube, solid carbon nanofiber or activated carbon fiber.
Be added with binding agent in described Carbon nanofiber paper, described binding agent is selected from the one of butadiene and cinnamic polymer (SBR), the fine multiple copolymer of propylene (LA133), vinyl acetate resin, acrylic resin, Polyurethane Thermoplastic Elastomer rubber, chlorinated rubber.
A preparation method for described Carbon nanofiber paper, comprises dispersion, homogenizing, filtration, baking, sheeting process, specifically comprises:
A, dispersion: described carbon nano-fiber is carried out ultrasonic disperse with certain concentration in alcohols solvent, described certain concentration is carbon nano-fiber quality (mg) is 0.01mg/ml-0.5mg/ml with the ratio of alcohols solvent volume (ml);
B, homogenizing: make the carbon nanofiber dispersion liquid of preparation reach homogenising by stirring action at a high speed; Homogenizing can ensure the even combination in film forming procedure between carbon nanotube molecule, makes the Carbon nanofiber paper smooth surface of preparation.Therefore Carbon nanofiber paper has very high uniformity on thickness.The self assembly effect in filter process of the high-flatness of base material and carbon nano-fiber, facilitates the uniformity of Carbon nanofiber paper jointly.
C, filtration: the carbon nanofiber dispersion liquid of homogenising is placed in corresponding filter and filters;
D, baking: solvent composition is removed by baking;
E, compressing tablet: regulate different pressure to carry out roll-in.
Optimize, in homogenization process, add binding agent and increase mechanical characteristic, described binding agent is selected from the one in butadiene and cinnamic polymer (SBR), the fine multiple copolymer of propylene (LA133), vinyl acetate resin, acrylic resin, Polyurethane Thermoplastic Elastomer rubber, chlorinated rubber, and binding agent should dilute evenly before adding.
The quality of described binding agent and the mass ratio of described carbon nano-fiber are 1%-50%.
Preferably, described alcohols solvent is isopropyl alcohol, absolute ethyl alcohol, n-butanol, or a kind of and mixed solvent in deionized water in above three kinds of alcohols solvents.
In described mixed solvent, the volume ratio of alcohols solvent and deionized water is not less than 1:1.
The state of described filtration is vacuum filtration, is characterized in that film forming speed is fast.
Baking condition selects normal temperature and pressure naturally to volatilize, or constant-pressure and high-temperature baking 45-120 DEG C, or low pressure quick baking ,-0.085MPa, 40-200 DEG C.Carbon nanofiber paper can easily from substrate transfer, and the Carbon nanofiber paper integrality after transfer is unaffected.
Principle of the present invention is: carbon nano-fiber is in alcohols solvent, by the effect of ultrasonic disperse, make between carbon nano-fiber and even molecule, to realize overall dispersity in the solution, homogenization process afterwards make this overall dispersity evenly, in filter process, carbon nano-fiber and molecule can form self assembly effect afterwards, and its adhesion main manifestations is the crosslinked action between molecule Van der Waals force and major diameter molecule.
The invention belongs to non-chemically technology type invention, the combination between carbon nano-fiber mainly obtains mechanical characteristic macroscopically by molecule Van der Waals force and the distinctive crosslinked action of major diameter molecule.The Carbon nanofiber paper of preparation has the self property of carbon nano-fiber, and has obvious hydrophobicity, can be used as water proofing property functional conductive film, and the Carbon nanofiber paper simultaneously can obtain high compacted density through high strength roll-in.
The present invention does not use dispersant, does not introduce new functional group, thus fully ensure that the self-characteristic of CNT, and molecule does not produce polarization, and electric conductivity is unaffected, and pH value is in neutral.
Carbon nanofiber paper prepared by the present invention does not introduce extra functional group, have very high cleannes, the carbon nano-fiber after filtration can accomplish zero loss, and solvent can recycle repeatedly, thus reduce production cost, for large-scale production provides favourable condition.
Accompanying drawing explanation
Fig. 1 is the electron microscope picture that SEM observes the Carbon nanofiber paper of lower preparation.
Fig. 2 is sheet resistance corresponding to the Carbon nanofiber paper of different-thickness and sheet resistance uniformity.
Detailed description of the invention
The specific embodiment of the invention prepares Carbon nanofiber paper, comprises the following steps:
A, dispersion, carbon nano-fiber has good compatibility in alcohols solvent, and carbon nano-fiber is placed in alcohols solvent, and the concentration range of carbon nano-fiber is 0.01mg/ml-0.5mg/ml.By the mode of ultrasonic disperse, jitter time, from 1 minute to 1 hour, makes carbon nano-fiber reach the dispersion of molecule rank.
Alcohols solvent is the mixed solvent of a kind of or isopropyl alcohol in isopropyl alcohol, absolute ethyl alcohol, absolute ethyl alcohol, n-butanol, deionized water two kinds or three kinds.Alcohols solvent is not less than 1:1 with the mixed volume ratio of deionized water.
The ultrasonic power of ultrasonic disperse operation can be controlled in 30W-600W, and ultrasonic time can according to the volume size setting 1-60min of solution.
B, homogenizing, makes carbon nano tube dispersion liquid be uniform distribution by the stirring action of high speed rotor, can add binding agent in this process, and binding agent should dilute evenly before adding.Binding agent is selected from the one in butadiene and cinnamic polymer, the fine multiple copolymer of propylene, vinyl acetate resin, acrylic resin, Polyurethane Thermoplastic Elastomer rubber, chlorinated rubber.The quality of binding agent and the mass ratio of described carbon nano-fiber are 1%-50%.
C, filters, and adopts the mode of vacuum filtration that CNT is filled on filter membrane.Vacuum filtration selects the vavuum pump of different speed of exhaust scope according to the size of pumping and filtering device, 0.1L/S-20.0L/S.
D, baking, the Carbon nanofiber paper of having filtered can be placed in vacuum drying oven and toast.Baking condition selects normal temperature and pressure naturally to volatilize, or constant-pressure and high-temperature baking 45-120 °, or low pressure quick baking ,-0.085MPa, 40-200 °.
E, compressing tablet, uses roll squeezer can improve the volume density of Carbon nanofiber paper.Carbon nanofiber paper can through roll squeezer roll-in, and compacted density can reach 0.5g/cm
3.
The present invention as shown in Figure 1 prepares the electron microscope picture that Carbon nanofiber paper adopts SEM to observe, as seen from the figure, be cross-linked with each other between carbon nano-fiber, entangled with one another, structure is relatively loose, and therefore the specific area of carbon nano-fiber characteristic that is large, good conductivity keeps down fully.
As shown in Figure 2, the carbon paper of 80 microns is chosen arbitrarily 10 diverse locations, sheet resistance, between 0.8-1 Ω/mouth, shows that this paper has good homogeneity.
The carbon paper of one 200 microns is chosen arbitrarily 10 diverse locations, and sheet resistance, between 1.9-2 Ω/mouth, shows that this paper has good homogeneity.
Be further described the method that the present invention prepares Carbon nanofiber paper below in conjunction with accompanying drawing and example, but limited the present invention never in any form, any change that training centre according to the present invention does or replacement, all belong to protection scope of the present invention.
Example 1:
Multi-walled carbon nano-tubes is placed in isopropyl alcohol (IPA, >95%) in solvent, carbon nano-tube solution concentration 0.5mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 30min dispersion carries out homogenizing process through the stirring action of homogenizer, solution is made to reach the even of entirety, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition-0.085MPA, 85 °, Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 2:
Single Walled Carbon Nanotube is placed in isopropyl alcohol (IPA, >95%) in solvent, carbon nano-tube solution concentration 0.05mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 30min dispersion carries out homogenizing process through the stirring action of homogenizer, solution is made to reach the even of entirety, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition-0.085MPA, 85 °, Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 3:
Multi-walled carbon nano-tubes and solid carbon nanofiber are placed in the mixed solvent (IPA/DIW of isopropyl alcohol and deionized water, volume ratio 1:1), carbon nano-tube solution concentration 0.05mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 30min dispersion carries out homogenizing process through the stirring action of homogenizer, solution is made to reach the even of entirety, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition-0.085MPA, 200 °, Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 4:
Multi-walled carbon nano-tubes and Single Walled Carbon Nanotube are placed in the mixed solvent (IPA/DIW of isopropyl alcohol and deionized water, volume ratio 3:1), carbon nano-tube solution concentration 0.1mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 30min dispersion carries out homogenizing process through the stirring action of homogenizer, solution is made to reach the even of entirety, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition-0.085MPA, 40 °, Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 5:
Solid carbon nanofiber is placed in absolute ethyl alcohol kind solvent, solution concentration 0.02mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 100W, solution after 40min dispersion carries out homogenizing process through the stirring action of homogenizer, solution is made to reach the even of entirety, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition-0.085MPA, 85 °, Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 6:
Single Walled Carbon Nanotube and solid carbon nanofiber are placed in the mixed solvent (C of absolute ethyl alcohol and deionized water
2h
5oH/DIW, volume ratio 3:1), solution concentration 0.3mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 30W, solution after 60min dispersion carries out homogenizing process through the stirring action of homogenizer, make solution reach the even of entirety, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition-0.085MPA, shifts Carbon nanofiber paper from substrate by 85 °, optionally carry out compressing tablet, can Carbon nanofiber paper be prepared.
Example 7:
Multi-walled carbon nano-tubes and activated carbon fiber are placed in the mixed solvent (IPA/DIW of isopropyl alcohol and deionized water, volume ratio 3:1), solution concentration 0.1mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 600W, solution after 10min dispersion carries out homogenizing process through the stirring action of homogenizer, solution is made to reach the even of entirety, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition-0.085MPA, 85 °, Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 8:
Single Walled Carbon Nanotube and activated carbon fiber are placed in the mixed solvent (IPA/DIW of isopropyl alcohol and deionized water, volume ratio 2:1), solution concentration 0.1mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 600W, solution after 45min dispersion carries out homogenizing process through the stirring action of homogenizer, solution is made to reach the even of entirety, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition-0.085MPA, 85 °, Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 9:
Solid carbon nanofiber is placed in n-butanol kind solvent, solution concentration 0.3mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 45min dispersion carries out homogenizing process through the stirring action of homogenizer, solution is made to reach the even of entirety, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition-0.085MPA, 85 °, Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 10:
Activated carbon fiber is placed in isopropyl alcohol kind solvent (IPA), solution concentration 0.08mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 30min dispersion carries out homogenizing process through the stirring action of homogenizer, the butadiene diluted and cinnamic polymer SBR emulsion are poured into (quality of SBR and the mass ratio of CNT are 2:100) uniformly simultaneously, solution is made to reach the even of entirety, rotor speed 2000r/min, 20min, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition-0.085MPA, 95 °, Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 11:
Solid carbon nanofiber and activated carbon fiber are placed in n-butanol kind solvent, solution concentration 0.5mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 30min dispersion carries out homogenizing process through the stirring action of homogenizer, the vinyl acetate resin emulsion of having diluted is poured into (quality of vinyl acetate resin and the mass ratio of CNT are 1:100) uniformly simultaneously, solution is made to reach the even of entirety, rotor speed 1500r/min, 20min, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition-0.085MPA, 185 °, Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 12:
Multi-walled carbon nano-tubes is placed in n-butanol kind solvent, solution concentration 0.09mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 30min dispersion carries out homogenizing process through the stirring action of homogenizer, the Polyurethane Thermoplastic Elastomer rubber TPU binding agent diluted is poured into (quality of TPU and the mass ratio of CNT are 50:100) uniformly simultaneously, solution is made to reach the even of entirety, rotor speed 2000r/min, 20min, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition-0.085MPA, 85 °, Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 13:
Single Walled Carbon Nanotube is placed in isopropyl alcohol kind solvent (IPA), solution concentration 0.05mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 30min dispersion carries out homogenizing process through the stirring action of homogenizer, the chlorinated rubber binding agent diluted is poured into (quality of chlorinated rubber and the mass ratio of CNT are 30:100) uniformly simultaneously, solution is made to reach the even of entirety, rotor speed 2000r/min, 20min, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition-0.085MPA, 85 °, Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 14:
Solid carbon nanofiber is placed in isopropyl alcohol kind solvent (IPA), solution concentration 0.05mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 45min dispersion carries out homogenizing process through the stirring action of homogenizer, fine for the propylene diluted polymer (LA133) emulsion is poured into (quality of LA133 and the mass ratio of CNT are 10:100) uniformly simultaneously, solution is made to reach the even of entirety, rotor speed 2000r/min, 20min, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition-0.085MPA, 200 °, Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 15:
CNT is placed in isopropyl alcohol kind solvent (IPA), solution concentration 0.15mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 45min dispersion carries out homogenizing process through the stirring action of homogenizer, the emulsion acrylic resin diluted is poured into uniformly (quality of acrylic resin and the mass ratio of CNT are 40:100) simultaneously, solution is made to reach the even of entirety, rotor speed 2000r/min, 20min, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition-0.085MPA, 105 °, Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 16:
CNT is placed in isopropyl alcohol kind solvent (IPA), solution concentration 0.25mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 45min dispersion carries out homogenizing process through the stirring action of homogenizer, solution is made to reach the even of entirety, rotor speed 2000r/min, 20min, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, drying condition normal temperature and pressure leaves standstill, afterwards Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 17:
CNT is placed in isopropyl alcohol kind solvent (IPA), solution concentration 0.05mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 45min dispersion carries out homogenizing process through the stirring action of homogenizer, solution is made to reach the even of entirety, rotor speed 2000r/min, 20min, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, drying condition normal pressure, 85 °, afterwards Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 18:
CNT is placed in isopropyl alcohol kind solvent (IPA), solution concentration 0.03mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 45min dispersion carries out homogenizing process through the stirring action of homogenizer, solution is made to reach the even of entirety, rotor speed 2000r/min, 20min, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, vacuum drying, flash baking condition-0.085MPA, 40 °, afterwards Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 19:
CNT is placed in isopropyl alcohol kind solvent (IPA), solution concentration 0.01mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 45min dispersion carries out homogenizing process through the stirring action of homogenizer, solution is made to reach the even of entirety, rotor speed 2000r/min, 20min, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 2L/S, normal pressure 100 ° baking, afterwards Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
Example 20:
CNT is placed in isopropyl alcohol kind solvent (IPA), solution concentration 0.5mg/ml, use ultrasonic method, in this solvent, CNT is carried out dispersion treatment, ultrasonic power 300W, solution after 45min dispersion carries out homogenizing process through the stirring action of homogenizer, the SBR emulsion of having diluted is poured into (quality of SBR and the mass ratio of CNT are 3:97) uniformly simultaneously, solution is made to reach the even of entirety, rotor speed 2000r/min, 20min, proceed to filter afterwards and carry out vacuum filtration, vavuum pump speed of exhaust 1L/S, normal pressure 45 ° baking, afterwards Carbon nanofiber paper is shifted from substrate, optionally carry out compressing tablet, Carbon nanofiber paper can be prepared.
It should be noted last that, above detailed description of the invention is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (9)
1. a Carbon nanofiber paper, it is characterized in that, combined by the crosslinked action relied between carbon nano-fiber between molecule Van der Waals force and carbon nano-fiber and form, described carbon nano-fiber comprises one or more in multi-walled carbon nano-tubes, Single Walled Carbon Nanotube, solid carbon nanofiber or activated carbon fiber.
2. according to the Carbon nanofiber paper described in claim 1, be characterized in: be added with binding agent, described binding agent is selected from the one of butadiene and cinnamic polymer (SBR), the fine multiple copolymer of propylene (LA133), vinyl acetate resin, acrylic resin, Polyurethane Thermoplastic Elastomer rubber, chlorinated rubber.
3. a preparation method for Carbon nanofiber paper according to claim 1, comprises dispersion, homogenizing, filtration, baking, sheeting process, specifically comprises:
A, dispersion: described carbon nano-fiber is carried out ultrasonic disperse with certain concentration in low molecular weight alcohols solvent, described certain concentration is carbon nano-fiber quality (mg) is 0.01mg/ml-0.5mg/ml with the ratio of alcohols solvent volume (ml);
B, homogenizing: make the carbon nanofiber dispersion liquid of preparation reach homogenising by stirring action at a high speed;
C, filtration: the carbon nanofiber dispersion liquid of homogenising is placed in corresponding filter and filters;
D, baking: solvent composition is removed by baking;
E, compressing tablet: regulate different pressure to carry out roll-in.
4. the preparation method of Carbon nanofiber paper according to claim 3, it is characterized in that: in described homogenization process, add binding agent, described binding agent is selected from the one in butadiene and cinnamic polymer, the fine multiple copolymer of propylene, vinyl acetate resin, acrylic resin, Polyurethane Thermoplastic Elastomer rubber, chlorinated rubber.
5. the preparation method of Carbon nanofiber paper according to claim 4, is characterized in: the quality of described binding agent and the mass ratio of described carbon nano-fiber are 1%-50%.
6. the preparation method of Carbon nanofiber paper according to claim 3, is characterized in that: described alcohols solvent is the mixed solvent of a kind of or isopropyl alcohol in isopropyl alcohol, absolute ethyl alcohol, absolute ethyl alcohol, n-butanol, deionized water two kinds or three kinds.
7. the preparation method of Carbon nanofiber paper according to claim 6, is characterized in that: alcohols solvent is not less than 1:1 with the mixed volume ratio of deionized water.
8. the preparation method of Carbon nanofiber paper according to claim 3, is characterized in that: the state of described filtration is vacuum filtration, and film forming speed is fast.
9. the preparation method of Carbon nanofiber paper according to claim 3, is characterized in that: baking condition selects normal temperature and pressure naturally to volatilize, or constant-pressure and high-temperature 45-120 DEG C of baking, or low pressure baking, and low pressure is-0.085MPa, and baking temperature is 40-200 DEG C.
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| CN108385450A (en) * | 2018-01-23 | 2018-08-10 | 柔电（武汉）科技有限公司 | A kind of carbon nanotube paper and preparation method thereof |
| CN111778779A (en) * | 2020-07-06 | 2020-10-16 | 上海安崎智能科技有限公司 | Whisker carbon nanotube far infrared paper and preparation method thereof |
| CN114137039A (en) * | 2021-11-25 | 2022-03-04 | 西安交通大学 | Gas storage bag integrated with wireless and passive ammonia gas sensor label and preparation method thereof |
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| CN111778779A (en) * | 2020-07-06 | 2020-10-16 | 上海安崎智能科技有限公司 | Whisker carbon nanotube far infrared paper and preparation method thereof |
| CN114137039A (en) * | 2021-11-25 | 2022-03-04 | 西安交通大学 | Gas storage bag integrated with wireless and passive ammonia gas sensor label and preparation method thereof |
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