CN109772243A - A kind of method of efficient hypergravity removing two-dimension nano materials - Google Patents
A kind of method of efficient hypergravity removing two-dimension nano materials Download PDFInfo
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- CN109772243A CN109772243A CN201811420442.6A CN201811420442A CN109772243A CN 109772243 A CN109772243 A CN 109772243A CN 201811420442 A CN201811420442 A CN 201811420442A CN 109772243 A CN109772243 A CN 109772243A
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Abstract
The present invention relates to Chemical Engineering and Technology fields, to solve the problems, such as that existing two-dimension nano materials stripping technology high energy consumption and efficiency is low, provide a kind of method of efficient hypergravity removing two-dimension nano materials, it sufficiently soaks and is uniformly mixed the following steps are included: (1) puts into two-dimensional layer material in dispersion liquid, material dispersion liquid is obtained, material dispersion liquid is then input to circulating storage groove；(2) the material dispersion liquid is exported from the outlet of circulating storage groove lower end, enter the central inlet of high-speed rotating secondary rotating flow reactor by pipeline, the feed liquid flowed out from reactor outlet, enter the entrance of tubular heat exchanger by pipeline, it is back in circulating storage groove from the feed liquid of tubular heat exchanger outlet outflow, the number of plies is obtained after so recycling repeatedly in 3 layers of few layer two-dimension nano materials below.The present invention may be implemented it is quick, efficient, low-cost, high-volume, produce various two-dimensional layer nano materials in high quality.
Description
Technical field
The present invention relates to Chemical Engineering and Technology fields more particularly to a kind of efficient hypergravity to remove two-dimension nano materials
Method.
Background technique
High-gravity technology is the new technology for strengthening multiphase flow transmitting and reaction process, due to its broad applicability and tool
Have that traditional equipment do not have it is small in size, light-weight, low energy consumption, Yi Yunzhuan, easy-maintaining, safe and reliable, flexible and more can
The advantages that adapting to environment, so that high-gravity technology has wide commercialization in the industrial circles such as environmental protection, material, biology, chemical industry
Application prospect.The basic principle of high gravity technology is the unique flow row using multiphase flow system under the conditions of super gravity field
To strengthen relative velocity between phase and phase and contacting with each other, to realize efficient momentum, quality and heat transfer process.
The mode for forming super gravity field is to form centrifugal force field by motor rotating machinery entirety or component.
So-called positive and negative energy stream refers to that fluid mechanical energy in flow process is just quicklyd increase or reduced, and deposits therebetween
It is attracting each other, the relationship mutually relied on and mutually converted.There are two types of the basic modes of rotation: primary rotation and secondary rotation
Turn, primary rotation refers to that object is rotated along a direction always, and secondary rotating refers to the every rotation 180 degree of object, direction of rotation
It is reverse primary.Rotating flow is characterized in that the direction of rotation center and centrifugal force all immobilizes always, by taking centrifugal pump as an example,
Mechanical energy is reduced rapidly along axial direction when fluid enters centrifugal pump, belongs to negative energy stream；And when fluid is along the radial quilt of centrifugal pump
When throwing away outward, mechanical energy is radially quicklyd increase, and belongs to positive energy stream.Rotating flow is typical positive energy as a whole
Amount stream, but the center of positive energy stream is negative energy stream, and positive and negative energy stream is completely separate in a rotating flow.
Secondary rotating stream is typical negative energy stream as a whole, when the fluid containing very high mechanical energy enters secondary rotation
When turn of tidal stream road, the mechanical energy streamwise (i.e. axial) of fluid is quickly and evenly reduced.It is synchronous with this, it is produced on flow area
Raw secondary flow, secondary flow belongs to positive energy stream, and after secondary flow reaches inertia flow regime, positive energy stream disappears.Cause
This, in the initial stage of secondary rotating stream, positive and negative energy stream is generated simultaneously and is combined together completely, and positive energy stream can be abundant
It absorbs the energy of negative energy stream and forms high-speed rotating dien vertex, the formation of dien vertex is that fluid radial direction shear stress is uniformly distributed
Result and external manifestation.By the way that the hypergravity level and reverse frequency of secondary rotating stream is continuously improved, secondary rotation can be extended
In turn of tidal stream positive energy stream there are the times.
" a kind of method and device of efficient removing two-dimension nano materials " is disclosed in Chinese patent literature, notification number is
CN107139573A, a kind of method which describes efficiently removing two-dimension nano materials, is typically characterised by secondary rotating
Mixer is flowed, fluid is in mixer in flow process, and every rotation 180 degree direction of rotation is reverse primary, and direction of rotation often overturns
Super gravity field intensity increases once, and few layer of graphite for efficiently removing high quality may be implemented in experiment discovery in this way
The effect of alkene (graphene number of plies can control within the scope of less than 3 layers).But this method there are still it is clearly disadvantageous it
Place, i.e. secondary rotating flow reactor needs are used in series with a centrifugal multistage pump multiple centrifugal pump and a tubular heat exchanger, when secondary rotation
The inlet pressure of turn of tidal stream reactor reaches 2.0 megapascal, and inlet flow rate is 200 milliliters/seconds, and the total mechanical energy of fluid is about 0.4 thousand
Watt.In order to reach the requirement of above-mentioned pressure and flow, the gross output of centrifugal multistage pump multiple centrifugal pump needs 2.0 kilowatts, 1.6 thousand had more
Watt mechanical energy dissipated in a manner of thermal energy into release system, i.e. the effective power of centrifugal multistage pump multiple centrifugal pump only has 20%.In order to control
Stripping process processed is carried out continuously at a lower temperature, and need to connect a tubular heat exchanger, and inside tubular heat exchanger
Refrigerant fluid is then up to 4.0 kilowatts of frozen liq circulating pump from gross output.
Summary of the invention
The present invention provides a kind of two wieners of efficient hypergravity removing to overcome above-mentioned problems of the prior art
Rice material method, may be implemented it is quick, energy-efficient, low-cost, high-volume, produce various two-dimensional layer nanometers in high quality
The effect of material.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of method of efficient hypergravity removing two-dimension nano materials, comprising the following steps:
(1) two-dimensional layer material is put into dispersion liquid, so that the surface of two-dimensional layer material is sufficiently soaked by dispersion liquid, and mixed
It closes uniformly, obtains material dispersion liquid, material dispersion liquid is then input to circulating storage groove；
(2) the material dispersion liquid is exported from the outlet of circulating storage groove lower end, enters high-speed rotating secondary rotating by pipeline
The central inlet of flow reactor, the feed liquid flowed out from reactor outlet, the entrance of tubular heat exchanger is entered by pipeline, from column
The feed liquid of pipe heat exchanger outlet outflow is back in circulating storage groove, and it is below few at 3 layers to obtain the number of plies after so recycling repeatedly
Layer two-dimension nano materials.
Primary rotation is unified for an entirety with secondary rotating by the present invention, makes once to rotate the positive energy stream and two generated
The negative energy stream that secondary rotation generates uniformly is integrated, and positive energy stream is converted into negative energy stream, and mechanical energy is substantially not present
It dissipates, and then significantly reduces cooling power.
Preferably, the secondary rotating flow reactor includes turntable, the center of the turntable is equipped with entrance, the turntable
Outside is equipped with opening, and the opening is connected by secondary rotating runner with entrance；The flow area of the secondary rotating runner
For circle, in favor of forming equally distributed shearing force field and dien vertex, the smallest secondary rotating radius R and flow area it is straight
The ratio between diameter D is greater than 5.
High-speed rotating secondary rotating flow reactor is a turntable, and import is located at the central opening of turntable, exports position
In outermost two openings of turntable.During removing two-dimension nano materials, import and export pressure is essentially equal, the reactor
By a motor driving, high-speed rotation is got up, and is quickly got rid of into secondary rotation after feed liquid enters high-speed rotating reactor center
In turn of tidal stream road, feed liquid very high hypergravity potential energy possessed by the axial direction is converted into radially high in secondary rotating runner
Speed rotation is formed by the kinetic energy of dien vertex, avoids previously described hypergravity potential energy and is first converted into static energy, static energy is again
It is converted into the loss of mechanical energy during transfer brought by kinetic energy.All two-dimensional materials in dien vertex, all by Dien
Whirlpool is got rid of to wall surface, and two-dimensional material collides and rubs with wall surface, and shearing force powerful between fluid layer is two dimension in dien vertex
Material rubs on wall surface and provides sufficiently high kinetic energy, and two-dimensional material is made quickly to be separated two-dimension nano materials (layer layer by layer
Number is less than 3 layers), these are close to the two-dimension nano materials that wall surface strips down and enter liquid phase master from wall surface strength removing by fluid layer again
In body.
Preferably, the two-dimensional layer material is the 4th to the 6th main group semiconducting compound (such as GaSe, SnS), mistake
Cross metal halide (such as PbI2、MgBr2), metal oxide (such as MnO2、MoO3), hexagonal boron nitride (white graphite alkene), graphite
Phase carbon nitride, transition metal carbide, carbonitride, the 4th main group graphene analog (semimetal silene, germanium alkene), the 4th master
The honeycomb binary compound (such as SiC, SnGe) of race's element, third to the 6th main group compound (such as InSb, GaN), the 5th master
Race's element (such as phosphorus alkene, arsenic alkene and antimony alkene), silicate, the charge balance diaphragm plate (such as mica, clay) of alumino-silicate, stratiform neatly
One of stone.
Preferably, the concentration of the material dispersion liquid is controlled in 2.0 ~ 8.0g/L in step (1).
Preferably, in step (2), fluid corotating 360 in the secondary rotating runner in secondary rotating flow reactor
Degree, the super gravity field as caused by secondary rotating is strongly continuous in rotary course quicklys increase, in first 180 degree rotary course
Middle hypergravity field strength is continuously quickly increased to 6000g from 3000g, and then direction of rotation occurs reverse, rotates in second 180 degree
Hypergravity field strength is continuously quickly increased to 9000g from 6000g in the process.
Preferably, realizing the continuous quick of hypergravity field strength caused by secondary rotating by continuously shortening radius of turn
Increase.
Preferably, in step (2), in the import of secondary rotating flow reactor and the outlet of the rotation of stripping process high speed
Between hypergravity potential energy difference be greater than 2.0MPa.
Preferably, in step (2), axial direction average linear velocity when the material dispersion liquid flows in secondary rotating runner
Not less than 30 m/s.
Preferably, the secondary rotating flow reactor inside cavity has streamline structure, portion is high in the cavity for turntable
Air drag is the smaller the better in fast rotary course.
Preferably, temperature control is at 0 DEG C or less in stripping process.
Preferably, it is to put in proportion that the method for the hypergravity removing two-dimension nano materials, which carries out the mode of scale amplification,
Greatly.
Therefore, the invention has the following beneficial effects: using technique of the invention may be implemented it is quick, efficient, inexpensive,
In high volume, various two-dimensional layer nano materials are produced in high quality.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of secondary rotating flow reactor.
Fig. 2 is the structural schematic diagram of secondary rotating flow reactor turntable.
In figure: turntable 1, bracket 2, motor 3, entrance 4, opening 5, secondary rotating runner 6.
Specific embodiment
Below by specific embodiment, and in conjunction with attached drawing, the technical solutions of the present invention will be further described.
In the present invention, if not refering in particular to, all devices and raw material is commercially available or the industry is common are following
Method in embodiment is unless otherwise instructed conventional method in that art.
Secondary rotating flow reactor used in the present invention is as shown in Figure 1, include turntable 1, the turntable is by upper and lower two parts structure
At, dial portion shown in Fig. 1 is the schematic diagram after being combined the upper and lower two parts of turntable, and turntable bottom is equipped with bracket 2,
Turntable is fixed on the rotor of motor 3；It is partially in the secondary rotating runner shown after opening turntable top shown in Fig. 2
Portion's structure.The center of turntable is equipped with entrance 4, is set on the outside of turntable there are two opening 5, opening passes through secondary rotating runner 6 and entrance
It is connected；The flow area of secondary rotating runner is circle, the ratio between the smallest secondary rotating radius R and the diameter D of flow area
Greater than 5；Secondary rotating flow reactor inside cavity has streamline structure.
Process to remove the few layer grapheme material of preparation is illustrated as specific embodiment, using isopropanol water solution
(english abbreviation: IPA) is used as dispersion liquid, and the specific gravity of the solution is 0.95 to 0.96g/mL, using flaky graphite as raw material.
Specific steps are as follows:
(1) flaky graphite is put into isopropanol water solution, so that the surface of flaky graphite is sufficiently soaked by dispersion liquid, and
Uniformly mixed that concentration is this dispersion liquid of the graphite of 4.0g/L, then by graphite, this dispersion liquid is input to circulating storage groove；
(2) this dispersion liquid of graphite is exported from the outlet of circulating storage groove lower end, enters high-speed rotating secondary rotating by pipeline
The central inlet of flow reactor, the feed liquid flowed out from reactor outlet, the entrance of tubular heat exchanger is entered by pipeline, from column
The feed liquid of pipe heat exchanger outlet outflow is back in circulating storage groove, obtains the number of plies in 3 layers of stone below after so recycling repeatedly
Black alkene nano material；Fluid corotation three-sixth turn in the secondary rotating runner in secondary rotating flow reactor, in rotary course
The super gravity field as caused by secondary rotating is strongly continuous to be quicklyd increase, in first 180 degree rotary course hypergravity field strength from
3000g is continuously quickly increased to 6000g, and then reverse, the super gravity field in second 180 degree rotary course occurs for direction of rotation
9000g is continuously quickly increased to from 6000g by force；Axially be averaged linear speed when this dispersion liquid of graphite flows in secondary rotating runner
Spending is 40 m/s, and in entire stripping process, temperature is controlled at 0 DEG C or less；
During Boli scale shape graphite, the import and export pressure of secondary rotating flow reactor is essentially equal, and high-speed rotating two
Hypergravity potential energy difference between secondary rotating flow Reactor inlet and outlet is greater than 2.0MPa.The secondary rotating flow reactor leans on one
Motor drives and high-speed rotation is got up, quilt after this dispersion liquid of graphite enters high-speed rotating secondary rotating flow reactor center
It quickly gets rid of in secondary rotating runner, feed liquid very high hypergravity potential energy possessed by the axial direction is direct in secondary rotating runner
Be converted into the kinetic energy that radially high speed rotation is formed by dien vertex, avoid previously described hypergravity potential energy be first converted into it is quiet
Pressure energy, static energy are then converted to the loss of mechanical energy during transfer brought by kinetic energy.All two-dimentional materials in dien vertex
Material, is all got rid of by dien vertex to wall surface, two-dimensional material collides and rubs with wall surface, shearing powerful between fluid layer in dien vertex
Power effect rubs on wall surface for two-dimensional material provides sufficiently high kinetic energy, and two-dimensional material is made quickly to be separated graphite layer by layer
Alkene two-dimension nano materials (number of plies is less than 3 layers), the graphene two-dimension nano materials that these abutting wall surfaces strip down are again by fluid layer
Enter in liquid phase main body from wall surface strength removing.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, and is not surpassing
There are also other variations and modifications under the premise of technical solution documented by claim out.
Claims (10)
1. a kind of method of efficient hypergravity removing two-dimension nano materials, which comprises the following steps:
(1) two-dimensional layer material is put into dispersion liquid and sufficiently soaks and be uniformly mixed, obtain material dispersion liquid, then by material point
Dispersion liquid is input to circulating storage groove；
(2) the material dispersion liquid is exported from the outlet of circulating storage groove lower end, enters high-speed rotating secondary rotating by pipeline
The central inlet of flow reactor, the feed liquid flowed out from reactor outlet, the entrance of tubular heat exchanger is entered by pipeline, from column
The feed liquid of pipe heat exchanger outlet outflow is back in circulating storage groove, and it is below few at 3 layers to obtain the number of plies after so recycling repeatedly
Layer two-dimension nano materials.
2. a kind of method of efficient hypergravity removing two-dimension nano materials according to claim 1, which is characterized in that described
Secondary rotating flow reactor includes turntable, and the center of the turntable is equipped with entrance, is equipped with opening, the opening on the outside of the turntable
It is connected by secondary rotating runner with entrance；The flow area of the secondary rotating runner is circle, the smallest secondary rotating
The ratio between diameter D of radius R and flow area is greater than 5.
3. a kind of method of efficient hypergravity removing two-dimension nano materials according to claim 1, which is characterized in that step
(1) in, the two-dimensional layer material is selected from the 4th to the 6th main group semiconducting compound, transition metal halide, metal oxidation
Object, hexagonal boron nitride, graphite phase carbon nitride, transition metal carbide, carbonitride, the 4th main group graphene analog, the 4th
The honeycomb binary compound of major element, third to the 6th main group compound, the 5th major element, silicate, alumino-silicate
Charge balance diaphragm plate, one of stratiform hydrotalcite.
4. a kind of method of efficient hypergravity removing two-dimension nano materials according to claim 1, which is characterized in that step
(1) in, the concentration of the material dispersion liquid is controlled in 2.0 ~ 8.0g/L.
5. a kind of method of efficient hypergravity removing two-dimension nano materials according to claim 1, which is characterized in that step
(2) in, fluid corotation three-sixth turn in the secondary rotating runner in secondary rotating flow reactor, by secondary in rotary course
Super gravity field is strongly continuous caused by rotation quicklys increase, and hypergravity field strength connects from 3000g in first 180 degree rotary course
Continuous to be quickly increased to 6000g, then direction of rotation occurs reverse, in second 180 degree rotary course hypergravity field strength from
6000g is continuously quickly increased to 9000g.
6. a kind of method of efficient hypergravity removing two-dimension nano materials according to claim 5, which is characterized in that pass through
The continuous radius of turn that shortens realizes continuously quickling increase for hypergravity field strength caused by secondary rotating.
7. a kind of method of efficient hypergravity removing two-dimension nano materials according to claim 1, which is characterized in that step
(2) in, the hypergravity potential energy difference between the import of secondary rotating flow reactor and outlet of stripping process high speed rotation is greater than
2.0MPa。
8. a kind of method of efficient hypergravity removing two-dimension nano materials according to claim 1, which is characterized in that step
(2) in, axial direction average linear velocity is not less than 30 m/s when the material dispersion liquid flows in secondary rotating runner.
9. a kind of method of efficient hypergravity removing two-dimension nano materials according to claim 1, which is characterized in that described
Secondary rotating flow reactor inside cavity has streamline structure.
10. a kind of method of -9 any efficient hypergravity removing two-dimension nano materials, feature exist according to claim 1
In temperature control is at 0 DEG C or less in stripping process.
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| CN105727811A (en) * | 2016-03-11 | 2016-07-06 | 无锡职业技术学院 | Hybrid graphene stripping system and hybrid graphene stripping method |
| CN105895913A (en) * | 2016-05-04 | 2016-08-24 | 北京化工大学 | Method for preparing two-dimensional material |
| CN107139573A (en) * | 2017-04-01 | 2017-09-08 | 浙江海洋大学 | A kind of efficient method and device for peeling off two-dimensional material |
| CN108630338A (en) * | 2018-03-08 | 2018-10-09 | 北京地泽科技有限公司 | A kind of method, apparatus for producing graphene conductive slurry in batches and graphene conductive slurry prepared therefrom |
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2018
- 2018-11-26 CN CN201811420442.6A patent/CN109772243B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090266202A1 (en) * | 2006-07-28 | 2009-10-29 | National Taiwan University | Method for manufacturing metal nanoparticle |
| CN104401970A (en) * | 2014-10-23 | 2015-03-11 | 江阴碳谷科技有限公司 | Rotary graphene stripping device, graphene production system and production method |
| CN105727811A (en) * | 2016-03-11 | 2016-07-06 | 无锡职业技术学院 | Hybrid graphene stripping system and hybrid graphene stripping method |
| CN105895913A (en) * | 2016-05-04 | 2016-08-24 | 北京化工大学 | Method for preparing two-dimensional material |
| CN107139573A (en) * | 2017-04-01 | 2017-09-08 | 浙江海洋大学 | A kind of efficient method and device for peeling off two-dimensional material |
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