CN105712319A - Preparation device for macroscopic aggregate of micro-nano material - Google Patents
Preparation device for macroscopic aggregate of micro-nano material Download PDFInfo
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- CN105712319A CN105712319A CN201610275587.6A CN201610275587A CN105712319A CN 105712319 A CN105712319 A CN 105712319A CN 201610275587 A CN201610275587 A CN 201610275587A CN 105712319 A CN105712319 A CN 105712319A
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Abstract
The invention relates to a preparation device for a macroscopic aggregate of a micro-nano material. The preparation device comprises a container used for being filled with micro-nano unit dispersion liquid, a pressure applying device and a reducing pipeline, wherein the micro-nano unit dispersion liquid comprises a solvent and micron-nano units; the inner diameter of the reducing pipeline is gradually reduced along extension direction of the reducing pipeline, and multiple open pores are formed in the pipe wall of the reducing pipeline; the micro-nano unit dispersion liquid flows to exit direct from an inlet of the reducing pipeline under pressure; the reducing pipeline forms a shearing field for the micro-nano unit dispersion liquid flowing inside, so that the micro-nano units in the flowing micro-nano unit dispersion liquid are orderly arranged along the flowing direction under the action of the shearing field; and the reducing pipeline also can gradually remove the solvent of the micro-nano unit dispersion liquid during shear flow of the micro-nano unit dispersion liquid after the micro-nano units are orderly arranged along the flowing direction.
Description
Technical field
The invention belongs to nanometer technique field, particularly relate to preparation method and the preparation facilities of macroscopical aggregation of a kind of micro Nano material.
Background technology
In macroscopical aggregation of the micro Nano material such as Graphene, CNT, basic construction unit is typically the sp of micro-meter scale2Carbon structure.This microcosmic texture characteristic determines assembled material need to transmit load by micro nano structure interphase interaction when stress.Research shows, the ordered arrangement of micro nano structure can help the transmission of the load of interlayer.But, the process technology such as current sucking filtration, spinning cannot obtain the high-sequential of micro Nano material, fine and close macroscopical aggregation, and its assembly microstructure is loose, structures shape performance, so the material property obtained is bigger with ideal situation gap.
In the Nature, the silk that Aranea spues has extremely strong toughness and intensity, is one of different material of known best performance, microscopic units high-sequential arrangement of its composition.Aranea is in moment of weaving silk, and the raw shear rate field of liquid flow movable property makes microcosmic component units high-sequential arrange, and therefore has the performance of excellence.Based on this, the present invention proposes the flowing of a kind of biological inspiration, evaporation package technique.By controlling evaporation, pressure reduction and line size produce controlled shear flow velocity field make the most micro-nano unit such as Graphene, CNT be assembled into microstructure meet above-mentioned requirements macroscopical aggregation.
Summary of the invention
The present invention provides the preparation facilities of macroscopical aggregation of a kind of micro Nano material.
The preparation facilities of macroscopical aggregation of a kind of micro Nano material, comprising: a container, described container is used for holding micro-nano unit dispersion liquid, and described micro-nano unit dispersion liquid includes solvent and the micro-nano unit being dispersed in this solvent；One device for exerting, described device for exerting applies pressure for the micro-nano unit dispersion liquid in this container；And a gradually reducing pipeline, described gradually reducing pipeline internal diameter tapers into along the bearing of trend of this gradually reducing pipeline, and has multiple perforate on the tube wall of described gradually reducing pipeline；One end that the internal diameter of this gradually reducing pipeline is bigger is defined as entrance, and one end that internal diameter is less is defined as outlet；The entrance of described gradually reducing pipeline and this reservoir, so that this micro-nano unit dispersion liquid flows to Way out from the entrance of described gradually reducing pipeline under the pressure of described device for exerting；Described gradually reducing pipeline forms a Shearing Flow to the micro-nano unit dispersion liquid of its internal flow so that the micro-nano unit in the micro-nano unit dispersion liquid of this flowing under this Shearing Flow effect along flow direction ordered arrangement；And described gradually reducing pipeline can also be at this micro-nano unit along after flow direction ordered arrangement, keep this micro-nano unit dispersion liquid to continue flowing, and while this this micro-nano unit dispersion liquid shear flow, gradually remove the solvent of this this micro-nano unit dispersion liquid.
Such as the preparation facilities of macroscopical aggregation of above-mentioned micro Nano material, wherein, the material of described gradually reducing pipeline is metal, pottery, glass, quartz or polymer；The shape of cross section of described gradually reducing pipeline is circle, ellipse, triangle, square, rectangle or other N limit shapes, N 5.
Such as the preparation facilities of macroscopical aggregation of above-mentioned micro Nano material, wherein, the multi-segment structure that described gradually reducing pipeline is alongst divided into, fit together during use.
Such as the preparation facilities of macroscopical aggregation of above-mentioned micro Nano material, wherein, each segment pipe is two lobes or many valve structures, fits together during use.
Such as the preparation facilities of macroscopical aggregation of above-mentioned micro Nano material, wherein, described opening is by a valve and this reservoir.
Such as the preparation facilities of macroscopical aggregation of above-mentioned micro Nano material, wherein, the plurality of perforate is only arranged at described gradually reducing pipeline alongst near the hindfoot portion of outlet.
Such as the preparation facilities of macroscopical aggregation of above-mentioned micro Nano material, wherein, the plurality of perforate is only arranged on one or more tube walls of described gradually reducing pipeline.
Such as the preparation facilities of macroscopical aggregation of above-mentioned micro Nano material, wherein, the plurality of perforate is arranged along radially around described gradually reducing pipeline.
Such as the preparation facilities of macroscopical aggregation of above-mentioned micro Nano material, wherein, the preparation facilities of macroscopical aggregation of described micro Nano material farther includes a heater, for heating the micro-nano unit dispersion liquid in this gradually reducing pipeline.
Such as the preparation facilities of macroscopical aggregation of above-mentioned micro Nano material, wherein, the preparation facilities of macroscopical aggregation of described micro Nano material farther includes a refrigerating plant, the micro-nano unit dispersion liquid in this gradually reducing pipeline freezing.
The preparation facilities using macroscopical aggregation of present invention offer prepares macroscopical aggregation of micro Nano material, have the advantage that one, by controlling the shear rate size that the pressure reduction of tapered fluid pipeline can control in pipeline, thus control micro-nano unit and be placed with sequence, therefore, the flow field in fluid line can be controlled by the external condition such as pressure reduction and line size, and then handle microstructure order and the density of micro Nano material macroscopic view assembly.Two, micro-nano unit is after shear flow is orderly, while shear flow, remove solvent and keep shearing force constant, flowing and remove the cooperative effect of solvent and make the order of micro-nano unit not be destroyed, ensures that the order of micro-nano unit in macroscopical aggregation of micro Nano material.Three, fluid media (medium) is readily available, pipeline processing technology maturation, is suitable for batch production, compared with other technology from bottom to top, is a kind of high flux, and the technology of low cost is suitable for large-scale industrial production.
Accompanying drawing explanation
The structural representation of the preparation facilities of macroscopical aggregation of the micro Nano material that Fig. 1 provides for the embodiment of the present invention 1.
The structural representation of the preparation facilities of macroscopical aggregation of the micro Nano material that Fig. 2 provides for the embodiment of the present invention 2.
The structural representation of the preparation facilities of macroscopical aggregation of the micro Nano material that Fig. 3 provides for the embodiment of the present invention 3.
Fig. 4 is the Flow Field Distribution schematic diagram in the gradually reducing pipeline of the embodiment of the present invention.
Fig. 5 is order and Peclet number (Peclet number), the graph of a relation of shear rate of the micro-nano unit in the gradually reducing pipeline of the embodiment of the present invention.
Fig. 6 is that the unordered micro nanometer fiber unit being scattered in solution of the embodiment of the present invention becomes orderly, the numerical simulation result of compact texture after the shearing of piping flow field, evaporation.
When Fig. 7 is the evaporation not considering solvent, the pressure difference suffered by micro-nano unit dispersion liquid in the gradually reducing pipeline of the embodiment of the present invention is along the distribution of duct length x and the relation of pipeline gradient β with described gradually reducing pipeline.
When Fig. 8 is the evaporation not considering solvent, the shear rate suffered by micro-nano unit dispersion liquid in the gradually reducing pipeline of the embodiment of the present invention along duct length x distribution and with shape, size, gradient β and the relation of inlet port pressure differential deltap p of described gradually reducing pipeline.
When Fig. 9 is the evaporation considering solvent, the shear rate suffered by micro-nano unit dispersion liquid in the gradually reducing pipeline of the embodiment of the present invention is along the distribution of duct length x and the relation of gradient β with described gradually reducing pipeline.
Main element symbol description
| The preparation facilities of macroscopical aggregation of micro Nano material | 10, 10A, 10B |
| Container | 12 |
| Device for exerting | 14 |
| Gradually reducing pipeline | 16 |
| Entrance | 160 |
| Outlet | 162 |
| Perforate | 164 |
| Valve | 18 |
| Heater | 17 |
| Refrigerating plant | 19 |
| Micro-nano unit dispersion liquid | 20 |
| Solvent | 22 |
| Micro-nano unit | 24 |
| Macroscopical aggregation of micro Nano material | 26 |
| Precast body | 28 |
Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Detailed description of the invention
Preparation method and the preparation facilities of macroscopical aggregation of the micro Nano material of present invention offer are described below with reference to above-mentioned accompanying drawing and different embodiment.
Seeing Fig. 1, the preparation facilities 10 of macroscopical aggregation of the micro Nano material that the embodiment of the present invention provides includes: container 12, device for exerting 14 and a gradually reducing pipeline 16.
Described container 12 is used for holding micro-nano unit dispersion liquid 20.Described micro-nano unit dispersion liquid 20 includes solvent 22 and is dispersed in the micro-nano unit 24 in this solvent 22.Described device for exerting 14 is connected with this container 12, applies pressure, so that this micro-nano unit dispersion liquid 20 can flow along described gradually reducing pipeline 16 for the micro-nano unit dispersion liquid 20 in this container 12.Described gradually reducing pipeline 16 is connected with this container 12, for the micro-nano unit dispersion liquid 20 of its internal flow is formed a Shearing Flow so that the micro-nano unit 24 in the micro-nano unit dispersion liquid 20 of this flowing under this Shearing Flow effect along flow direction ordered arrangement.And, described gradually reducing pipeline 16 can also be at this micro-nano unit 24 along after flow direction ordered arrangement, this micro-nano unit dispersion liquid 20 is kept to continue flowing, and while this micro-nano unit dispersion liquid 20 shear flow, gradually remove the solvent 22 of this micro-nano unit dispersion liquid 20, thus in described gradually reducing pipeline 16, obtain macroscopical aggregation 26 of a micro Nano material.
Shape, size and the structure of described container 12 do not limit, and can design as required.The material of described container 12 can be the material that metal, pottery, glass, quartz or polymer etc. have certain degree of hardness and intensity.
Described device for exerting 14 can be any can to execute stressed device to the micro-nano unit dispersion liquid 20 in this container 12.The position that described device for exerting 14 is arranged does not limits, and can select as required.
The internal diameter of described gradually reducing pipeline 16 tapers into along the bearing of trend of this gradually reducing pipeline 16.One end bigger for the internal diameter of this gradually reducing pipeline 16 is defined as entrance 160 by the present invention, and one end that internal diameter is less is defined as exporting 162.Preferably, the internal diameter of described gradually reducing pipeline 16 tapers into outlet 162 from entrance 160.The entrance 160 of described gradually reducing pipeline 16 is connected with this container 12 by a valve 18.Entrance 160 and outlet 162 sizes of described gradually reducing pipeline 16 do not limit, and can design as required.The material of described gradually reducing pipeline 16 can be the material that metal, pottery, glass, quartz or polymer etc. have certain degree of hardness and intensity.The shape of cross section of described gradually reducing pipeline 16 does not limits, and can be circle, ellipse, triangle, square, rectangle and other N limit shapes, N 5.The length of described gradually reducing pipeline 16 does not limits, and can design as required.It is appreciated that, the length of described gradually reducing pipeline 16 need to guarantee described micro-nano unit dispersion liquid 20 under Shearing Flow effect along after flow direction ordered arrangement, keep this micro-nano unit dispersion liquid 20 to continue flowing, and while this micro-nano unit dispersion liquid 20 shear flow, gradually remove the solvent 22 of this micro-nano unit dispersion liquid 20.Preferably, described gradually reducing pipeline 16 is the non-slip flow body pipeline relative to described solvent 22.Described gradually reducing pipeline 16 cross section alongst can be two spaced straight lines or camber line.The time of the gradients affect flow evaporation of described gradually reducing pipeline 16, this also affects final pattern.Gradient is crossed conference and is caused shearing insufficient, may will not high-sequential.The gradient of described gradually reducing pipeline 16 is relevant to length and gateway 160 diameter.Described gradually reducing pipeline 16 can be structure as a whole can also be for Split type structure.Preferably, described gradually reducing pipeline 16 uses Split type structure, in order to follow-up taken out by the macroscopical aggregation 26 being deposited on the micro Nano material of its inwall, and is carried out its inwall.Preferably, the multi-segment structure that described gradually reducing pipeline 16 can alongst be divided into, fit together during use.Further, each segment pipe can also be two lobes or many valve structures, fits together during use.It is appreciated that described gradually reducing pipeline 16 can also be for a part for other non-tapered pipelines, as long as the part at this gradually reducing pipeline 16 can realize the purpose of the present invention.
There is multiple perforate 164, for removing the solvent 22 of this micro-nano unit dispersion liquid 20 on the tube wall of described gradually reducing pipeline 16.Described perforate 164 shape does not limits, and can be circle, ellipse, triangle, square, rectangle etc..The size of described perforate 164 and density can be according to the size Selection of described micro-nano unit 24.Size and density by described perforate 164 can control to remove the speed of the solvent 22 of this micro-nano unit dispersion liquid 20.Preferably, described perforate 164 should be more than the full-size of described micro-nano unit 24 along the size of the bearing of trend of this gradually reducing pipeline 16, and the such as length of one-dimensional micro-nanometer material, to prevent described micro-nano unit 24 from spilling out from this perforate 164 along with solvent 22.It is appreciated that a range of a little micro-nano unit flows out can also accept.The plurality of perforate 164 can be arranged along radially around described gradually reducing pipeline 16, it is also possible to is only arranged on one or more tube walls of described gradually reducing pipeline 16.It is appreciated that after described micro-nano unit dispersion liquid 20 enters described gradually reducing pipeline 16, needs flowing a period of time that described micro-nano unit dispersion liquid 20 can be made under Shearing Flow effect along flow direction ordered arrangement.Therefore, at described gradually reducing pipeline 16 near the front section of entrance 160, it is not necessary to arrange perforate 164.It is to say, the plurality of perforate 164 can be only arranged at the described gradually reducing pipeline 16 hindfoot portion near outlet 162 by axially/length direction.
Seeing Fig. 2, the preparation facilities 10 of macroscopical aggregation of described micro Nano material can also include a heater 17, for heating the micro-nano unit dispersion liquid 20 in this gradually reducing pipeline 16.The structure of described heater 17 and arrange position and do not limit, can design as required.
Seeing Fig. 3, the preparation facilities 10 of macroscopical aggregation of described micro Nano material can also include a refrigerating plant 19, the micro-nano unit dispersion liquid 20 in this gradually reducing pipeline 16 freezing.The structure of described refrigerating plant 19 and arrange position and do not limit, can design as required.
Described solvent 22 can be one or more in water and organic solvent.Described solvent 22 can also be for the polymer of fusing or metal.Described organic solvent be in methanol, ethanol, acetone, dichloroethanes and chloroform one or more.Described micro-nano unit 24 can be one or more in one-dimensional micro-nanometer material and two dimension micro Nano material.Described one-dimensional micro-nanometer material can be one or more in micro-nano pipe, micro-nano rice noodle, micro-and nanorods and micro-nano band.Described two dimension micro Nano material is one or more in micro-nano, micro-nano film and micro-nano layer.Described micro-nano unit dispersion liquid 20 can further include dispersant or surfactant, so that described micro-nano unit 24 is dispersed, do not reunite.Described micro-nano unit 24 can be dispersed in solvent 22 by ultrasonic.
The preparation facilities 10 or 10A of macroscopical aggregation of the micro Nano material that the employing present invention introduced below provides prepares the method for macroscopical aggregation 26 of micro Nano material, and the method includes: make this micro-nano unit dispersion liquid 20 from the entrance 160 of described gradually reducing pipeline 16 to exporting 162 direction flowings；And remove solvent 22 while making this micro-nano unit dispersion liquid 20 shear flow.Preferably, this micro-nano unit 24 is through shear flow and along after flow direction ordered arrangement, then removes solvent 22 while making this micro-nano unit dispersion liquid 20 shear flow.
In said method, described micro-nano unit dispersion liquid 20 is radially being full of whole gradually reducing pipeline 16 during flowing in described gradually reducing pipeline 16.Preferably, described gradually reducing pipeline 16 is the non-slip flow body pipeline relative to described solvent 22.Owing to being easily subject to the shearing force of tube wall near the fluid of described gradually reducing pipeline 16 tube wall, and the fluid being positioned at described gradually reducing pipeline 16 center is not readily susceptible to the shearing force of tube wall, the present invention is more preferably, described solvent 22 has certain viscosity, so that the fluid of everywhere can be by shearing force in described gradually reducing pipeline 16.The method of described removal solvent 22 is for making solvent 22 permeable by the plurality of perforate 164, or makes solvent 22 evaporated from the plurality of perforate 164 by heating.Pressure difference is formed between entrance 160 and the outlet 162 of described gradually reducing pipeline 16.It is appreciated that the density of the macroscopical aggregation 26 that can be controlled the flow of this micro-nano unit dispersion liquid 20 and the micro Nano material of acquisition by this pressure difference.Macroscopical aggregation 26 of the micro Nano material of described acquisition can take out at the outlet 162 of described gradually reducing pipeline 16, or by described gradually reducing pipeline 16 is opened taking-up.
The principle of the preparation method of macroscopical aggregation of the micro Nano material that the present invention introduced below provides.
When described micro-nano unit dispersion liquid 20 is after the entrance 160 of described gradually reducing pipeline 16 is passed through, and the VELOCITY DISTRIBUTION of the micro-nano unit dispersion liquid 20 in described gradually reducing pipeline 16 is as shown in Figure 4.Now, the gradient of speed is shear rate, and described gradually reducing pipeline 16 average shear rate γ can use below equation (1) to describe:
γ=Q/dw2 (1)
Wherein Q is the flow of described micro-nano unit dispersion liquid 20, d and w is respectively the depth and width of described gradually reducing pipeline 16.As can be seen here, in the case of equal flow, described gradually reducing pipeline 16 radial dimension is the least, it is possible to obtain higher shear rate.Wherein, the flow of described micro-nano unit dispersion liquid 20 is controlled by the size of described gradually reducing pipeline 16 and the pressure reduction at two ends.And the pressure reduction at described gradually reducing pipeline 16 two ends is controlled by described device for exerting 14.Therefore, the Flow Field Distribution of described gradually reducing pipeline 16 can be regulated and controled by the size and described device for exerting 14 that regulate and control described gradually reducing pipeline 16.
The micro-nano unit 24 in fluid in described gradually reducing pipeline 16 is by the shearing force of Shearing Flow and thermal agitation.The strength ratio of the two can be weighed with Peclet number Pe, is expressed as formula (2):
Pe = γ/D
(2)
Wherein D is the rotational diffusion coefficient of the micro-nano unit 24 weighing thermal agitation effect-size.Peclet number and shear rate are linear relationship.The order of the micro-nano unit 24 in fluid in described gradually reducing pipeline 16 is closely related with Peclet number, and under two-dimensional case, order O equation below (3) represents:
O = <2cos2θ −1> (3)
Wherein θ be described micro-nano unit 24 axially and the angle in flow velocity direction.When disorder distribution, the value of O is 0；θ=0 when the limit is orderly, the value of O is 1.As it is shown in figure 5, in the case of not considering micro-nano unit 24 inertia effect, shear rate is the biggest, and Peclet number is the biggest, and order is the highest.Therefore, it can control Peclet number by control flow field shear rate, and then adjust the order of described micro-nano unit 24 macroscopic view assembly.
When described micro-nano unit 24 in described gradually reducing pipeline 16 clipped in order after, keep fluid flow and start to remove solvent 22, i.e. described solvent 22 passes through perforate 164 and discharges described gradually reducing pipeline 16.Due to the minimizing of solvent 22 in described gradually reducing pipeline 16, cause the minimizing of flow, use gradually reducing pipeline can keep the shear rate that flows, thus keep the order of the micro-nano unit 24 in fluid.Simultaneously as the minimizing of solvent 22, the concentration of the micro-nano unit 24 in fluid increases, thus obtains macroscopical aggregation 26 of the micro Nano material of densification.See Fig. 6, after the shearing of piping flow field, evaporation, become orderly, the numerical simulation result of compact texture for the unordered micro nanometer fiber unit being scattered in solution of the embodiment of the present invention.
The shape of described gradually reducing pipeline 16, size, pressure, shear rate relation analysis as follows.Assume that the pressure at entrance 160 is p1, exporting the pressure at 162 is p2, the height of entrance 160 is h1, outlet 162 height be h2.The pressure reduction of the most described gradually reducing pipeline 16 is Δ p=p1 – p2。
When not considering the evaporation of solvent 22, the shear rate in described gradually reducing pipeline 16 is distributed as:
(4)
Wherein, in above formula (4), μ is the viscosity of described micro-nano unit dispersion liquid 20.Fig. 7 is that the pressure difference suffered by micro-nano unit dispersion liquid 20 in described gradually reducing pipeline 16 is along the distribution of duct length x and the relation of pipeline gradient β with described gradually reducing pipeline 16, wherein, 0≤x≤L, β=h2/h1.Fig. 8 be the shear rate suffered by micro-nano unit dispersion liquid 20 in described gradually reducing pipeline 16 along the distribution of duct length x and with shape, size, gradient β and the relation of inlet port pressure differential deltap p of described gradually reducing pipeline 16, wherein, Fig. 8 has passed the imperial examinations at the provincial level 5 examples their relations of explanation.
When considering the evaporation of solvent 22, the shear rate in described gradually reducing pipeline 16 is distributed as shown in Figure 9.As shown in the dotted line of Fig. 9 border, when not having solvent 22 to evaporate along gradually reducing pipeline 16, owing to being gradually reducing pipeline, shear rate is continuously increased to outlet 162 from entrance 160.As shown in solid in Fig. 9 border, when solvent 22 arrival outlet 162 all evaporates, shear rate constantly reduces to outlet 162 from entrance 160, and the shear rate at outlet 162 is 0.Other situations all fall in dotted line and the region of solid line envelope.Fig. 9 sets forth under three kinds of different gradients β, the contrast of the shear rate distribution in described gradually reducing pipeline 16.It will be seen that pipeline gradient β is the biggest, shear rate changes in distribution is the most violent.
It is appreciated that the solvent 22 at the micro-nano unit 24 of ordered distribution in described gradually reducing pipeline 16 can all be removed by the method using the present invention, obtains macroscopical aggregation 26 of a micro Nano material.It is appreciated that macroscopical aggregation 26 of the micro Nano material that solvent 22 obtains after all removing is easily adsorbed on described gradually reducing pipeline 16 inwall, and is difficult to separate with described gradually reducing pipeline 16.The method using the present invention can also wait the micro-nano unit 24 of ordered distribution in described gradually reducing pipeline 16 to take out after reaching finite concentration value to obtain a precast body, reheat this precast body.This precast body easily separates with described gradually reducing pipeline 16.The order of described micro-nano unit 24 arrangement can determine by the way of calculating, measuring.The concentration of the micro-nano unit 24 of this ordered distribution can determine by measuring the total evaporation of micro-nano unit dispersion liquid 20 concentration at entrance 160 and solvent 22.
The preparation method of macroscopical aggregation of the micro Nano material that the present invention provides has the advantage that one, by controlling the shear rate size that the pressure reduction of tapered fluid pipeline can control in pipeline, thus control micro-nano unit and be placed with sequence, therefore, the flow field in fluid line can be controlled by the external condition such as pressure reduction and line size, and then handle microstructure order and the density of micro Nano material macroscopic view assembly.Two, micro-nano unit is after shear flow is orderly, while shear flow, remove solvent and keep shearing force constant, flowing and remove the cooperative effect of solvent and make the order of micro-nano unit not be destroyed, ensures that the order of micro-nano unit in macroscopical aggregation of micro Nano material.Three, fluid media (medium) is readily available, pipeline processing technology maturation, is suitable for batch production, compared with other technology from bottom to top, is a kind of high flux, and the technology of low cost is suitable for large-scale industrial production.
It it is below the specific embodiment of the present invention
Embodiment 1
See Fig. 1, for the preparation facilities 10 of macroscopical aggregation of the micro Nano material that the embodiment of the present invention 1 uses.In the present embodiment, described container 12 is rectangle steel container.Described device for exerting 14 is a piston, is moved bottom this container 12 by piston, thus the micro-nano unit dispersion liquid 20 in this container 12 is applied pressure.In the present embodiment, described gradually reducing pipeline 16 is circular quartz ampoule for cross section.The plurality of perforate 164 is circular, and arranges along radially around described gradually reducing pipeline 16.The plurality of perforate 164 is micron order size.Described micro-nano unit dispersion liquid 20 is formed by dispersing graphene in water.
In the present embodiment, the method for the macroscopical aggregation 26 preparing micro Nano material is: first, is placed in described container 12 by the micro-nano unit dispersion liquid 20 of Graphene；Secondly, open valve 18, and make described micro-nano unit dispersion liquid 20 flow to exporting 162 directions from the entrance 160 of described gradually reducing pipeline 16 by described device for exerting 14；Then, described micro-nano unit 24 after shear flow along after flow direction ordered arrangement, solvent 22 is removed by perforate 164 infiltration while this micro-nano unit dispersion liquid 20 shear flow, thus obtain macroscopical aggregation 26 of the orderly and pycnomorphous micro Nano material of a Graphene, and macroscopical aggregation 26 of this micro Nano material is deposited on the inwall of described gradually reducing pipeline 16；Finally, open described gradually reducing pipeline 16 to be taken out by macroscopical aggregation 26 of this micro Nano material.
Embodiment 2
See Fig. 2, for the preparation facilities 10A of macroscopical aggregation of the micro Nano material that the embodiment of the present invention 2 uses.The structure of the preparation facilities 10 of macroscopical aggregation of the micro Nano material that the preparation facilities 10A of macroscopical aggregation of the micro Nano material that the embodiment of the present invention 2 uses uses with the embodiment of the present invention 1 is essentially identical, it is distinguished as, described gradually reducing pipeline 16 is square for cross section, and the plurality of perforate 164 is only arranged on the end face with described gradually reducing pipeline 16；Further, a heater 17 is arranged at the outer surface of described gradually reducing pipeline 16.In the present embodiment, described heater 17 is resistive heater, and it is wrapped in the outer surface of described gradually reducing pipeline 16.Between adjacent two circles of this resistance wire, interval is arranged, and the plurality of perforate 164 is arranged between two adjacent circles.
In the present embodiment, described micro-nano unit dispersion liquid 20 by being scattered in ethanol formation by CNT.The method of the described macroscopical aggregation 26 preparing micro Nano material is: first, is placed in described container 12 by the micro-nano unit dispersion liquid 20 of CNT；Secondly, open valve 18, and make described micro-nano unit dispersion liquid 20 flow to exporting 162 directions from the entrance 160 of described gradually reducing pipeline 16 by described device for exerting 14；Then, described micro-nano unit 24 after shear flow along after flow direction ordered arrangement, while this micro-nano unit dispersion liquid 20 shear flow, heating evaporation removes solvent 22, thus obtains macroscopical aggregation 26 of the orderly and pycnomorphous micro Nano material of a CNT.Further, in the present embodiment, by a clip by macroscopical aggregation 26 of described micro Nano material from outlet 162 release formation one micro Nano material fiber.As long as being appreciated that while being extracted out by macroscopical aggregation 26 of the micro Nano material exporting 162 sides, inject new micro-nano unit dispersion liquid 20 from entrance 160 side, it is possible to continuously prepare micro Nano material fiber.
Embodiment 3
See Fig. 3, for the preparation facilities 10B of macroscopical aggregation of the micro Nano material that the embodiment of the present invention 3 uses.The structure of the preparation facilities 10 of macroscopical aggregation of the micro Nano material that the preparation facilities 10B of macroscopical aggregation of the micro Nano material that the embodiment of the present invention 3 uses uses with the embodiment of the present invention 1 is essentially identical, it is distinguished as, and the plurality of perforate 164 only arranges one section, the centre with described gradually reducing pipeline 16；Further, a refrigerating plant 19 is arranged at described gradually reducing pipeline 16 near a section of outlet 162.Described gradually reducing pipeline 16 is to a section of refrigerating plant 19 should not having perforate 164.
In the present embodiment, described micro-nano unit dispersion liquid 20 is by being dispersed in water formation by CNT.The method of the described macroscopical aggregation 26 preparing micro Nano material is: first, is placed in described container 12 by the micro-nano unit dispersion liquid 20 of CNT；Secondly, open valve 18, and make described micro-nano unit dispersion liquid 20 flow to exporting 162 directions from the entrance 160 of described gradually reducing pipeline 16 by described device for exerting 14；Then, described micro-nano unit 24 after shear flow along after flow direction ordered arrangement, while this micro-nano unit dispersion liquid 20 shear flow, remove solvent 22 by perforate 164 infiltration, thus obtain the micro-nano unit dispersion liquid 20 of a CNT ordered arrangement；After the carbon nanotube concentration in this micro-nano unit dispersion liquid 20 reaches certain value, a precast body 28 is formed by freezing for this micro-nano unit dispersion liquid 20 by refrigerating plant 19, then after this precast body 28 being taken out, removed the solvent 22 of residual by distillation, obtain macroscopical aggregation 26 of micro Nano material.
The various embodiments described above are to be described further present invention, should not be construed as the scope of the present invention and are only limitted to above-described embodiment, and all technology realized based on foregoing belong to the scope of protection of the invention.It addition, those skilled in the art can also do other change in spirit of the present invention, these changes done according to present invention spirit, all should be included in scope of the present invention.
Claims (10)
1. a preparation facilities for macroscopical aggregation of micro Nano material, comprising:
One container, described container is used for holding micro-nano unit dispersion liquid, and described micro-nano unit dispersion liquid includes solvent and the micro-nano unit being dispersed in this solvent；
One device for exerting, described device for exerting applies pressure for the micro-nano unit dispersion liquid in this container；And
One gradually reducing pipeline, described gradually reducing pipeline internal diameter tapers into along the bearing of trend of this gradually reducing pipeline, and has multiple perforate on the tube wall of described gradually reducing pipeline；One end that the internal diameter of this gradually reducing pipeline is bigger is defined as entrance, and one end that internal diameter is less is defined as outlet；The entrance of described gradually reducing pipeline and this reservoir, so that this micro-nano unit dispersion liquid flows to Way out from the entrance of described gradually reducing pipeline under the pressure of described device for exerting；Described gradually reducing pipeline forms a Shearing Flow to the micro-nano unit dispersion liquid of its internal flow so that the micro-nano unit in the micro-nano unit dispersion liquid of this flowing under this Shearing Flow effect along flow direction ordered arrangement；And described gradually reducing pipeline can also be at this micro-nano unit along after flow direction ordered arrangement, keep this micro-nano unit dispersion liquid to continue flowing, and while this this micro-nano unit dispersion liquid shear flow, gradually remove the solvent of this this micro-nano unit dispersion liquid.
2. the preparation facilities of macroscopical aggregation of micro Nano material as claimed in claim 1, it is characterised in that the material of described gradually reducing pipeline is metal, pottery, glass, quartz or polymer；The shape of cross section of described gradually reducing pipeline is circle, ellipse, triangle, square, rectangle or other N limit shapes, N 5.
3. the preparation facilities of macroscopical aggregation of micro Nano material as claimed in claim 1, it is characterised in that the multi-segment structure that described gradually reducing pipeline is alongst divided into, fits together during use.
4. the preparation facilities of macroscopical aggregation of micro Nano material as claimed in claim 3, it is characterised in that each segment pipe is two lobes or many valve structures, fits together during use.
5. the preparation facilities of macroscopical aggregation of micro Nano material as claimed in claim 1, it is characterised in that described opening is by a valve and this reservoir.
6. the preparation facilities of macroscopical aggregation of micro Nano material as claimed in claim 1, it is characterised in that the plurality of perforate is only arranged at described gradually reducing pipeline alongst near the hindfoot portion of outlet.
7. the preparation facilities of macroscopical aggregation of micro Nano material as claimed in claim 1, it is characterised in that the plurality of perforate is only arranged on one or more tube walls of described gradually reducing pipeline.
8. the preparation facilities of macroscopical aggregation of micro Nano material as claimed in claim 1, it is characterised in that the plurality of perforate is arranged along radially around described gradually reducing pipeline.
9. the preparation facilities of macroscopical aggregation of micro Nano material as claimed in claim 1, it is characterised in that the preparation facilities of macroscopical aggregation of described micro Nano material farther includes a heater, for heating the micro-nano unit dispersion liquid in this gradually reducing pipeline.
10. the preparation facilities of macroscopical aggregation of micro Nano material as claimed in claim 1, it is characterised in that the preparation facilities of macroscopical aggregation of described micro Nano material farther includes a refrigerating plant, the micro-nano unit dispersion liquid in this gradually reducing pipeline freezing.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106044705A (en) * | 2016-07-08 | 2016-10-26 | 上海大学 | Oriented and ordered assembling device for nanostructures |
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| US7708949B2 (en) * | 2002-06-28 | 2010-05-04 | President And Fellows Of Harvard College | Method and apparatus for fluid dispersion |
| CN102442635A (en) * | 2011-10-17 | 2012-05-09 | 南昌大学 | Method for modifying micro-fluidic chip by using chiral selective magnetically-functionalized graphene |
| CN103623720A (en) * | 2013-12-19 | 2014-03-12 | 东南大学 | Differential adding, atomizing and dispersing method and device for preparing nano fluid |
| CN205653167U (en) * | 2016-04-29 | 2016-10-19 | 清华大学 | Preparation facilities of macroscopical aggregate of little nano -material |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7708949B2 (en) * | 2002-06-28 | 2010-05-04 | President And Fellows Of Harvard College | Method and apparatus for fluid dispersion |
| CN102442635A (en) * | 2011-10-17 | 2012-05-09 | 南昌大学 | Method for modifying micro-fluidic chip by using chiral selective magnetically-functionalized graphene |
| CN103623720A (en) * | 2013-12-19 | 2014-03-12 | 东南大学 | Differential adding, atomizing and dispersing method and device for preparing nano fluid |
| CN205653167U (en) * | 2016-04-29 | 2016-10-19 | 清华大学 | Preparation facilities of macroscopical aggregate of little nano -material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106044705A (en) * | 2016-07-08 | 2016-10-26 | 上海大学 | Oriented and ordered assembling device for nanostructures |
| CN106044705B (en) * | 2016-07-08 | 2017-12-22 | 上海大学 | A kind of oriented and ordered assembling device of nanostructured |
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| CN105712319B (en) | 2018-01-23 |
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