CN210367000U - Gas-driven layered material stripping device - Google Patents
Gas-driven layered material stripping device Download PDFInfo
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- CN210367000U CN210367000U CN201822277060.4U CN201822277060U CN210367000U CN 210367000 U CN210367000 U CN 210367000U CN 201822277060 U CN201822277060 U CN 201822277060U CN 210367000 U CN210367000 U CN 210367000U
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Abstract
The utility model discloses a gas-driven layered material stripping device, which comprises a liquid raw material storage tank, a feed pump, a compressed gas source, a tee joint, a spiral stripping pipe, a gas-liquid separator, a liquid intermediate storage tank and a product storage tank; the inlet of the feed pump is connected with the liquid raw material storage tank, the outlet of the feed pump is connected with the inlet of the spiral stripping pipe, and the outlet of the spiral stripping pipe is connected with the inlet of the gas-liquid separator; the gas-liquid separator is provided with a gas outlet and a liquid outlet, the liquid outlet of the gas-liquid separator is connected with the inlet of the intermediate liquid storage tank, and the outlet of the intermediate liquid storage tank is respectively connected with the inlet of the feed pump and the product storage tank; the compressed gas source is respectively communicated with the feeding pump and the spiral stripping pipe through a tee joint. The utility model discloses a gaseous driven laminar material stripping off device simple structure, operating condition is mild, and the two-dimensional material quality that obtains is high, but wide application in the peeling off of laminar materials such as graphite alkene, boron nitride.
Description
Technical Field
The utility model relates to a gas-driven stratified material stripping off device belongs to two-dimentional nano-material scale preparation technical field.
Background
Two-dimensional nanomaterials, such as graphene, have shown broad application prospects in fields such as electronic information, energy, catalysis, composite nanomaterials, and the like due to their unique physicochemical properties. The low-cost and large-scale production of the high-quality layered two-dimensional nano material is the basis for realizing the application of the high-quality layered two-dimensional nano material. The liquid phase stripping method is a technology which is expected to realize the low-cost and large-scale preparation of the high-quality two-dimensional nano material. In the liquid phase peeling process, normal force and lateral shearing force are the main forces for peeling, wherein the shearing force is the ideal force for peeling the layered material. Research shows that for the peeling of the layered material, a very high critical shear rate exists, for example, the critical shear rate of graphene is 104And s. To achieve the critical shear rate, it is generally necessary to apply a high pressure to the liquid (c) ((m))>10Mpa) or to impart high intensity (thousands to tens of thousands rpm), which usually requires complex, expensive equipment to achieve, which certainly hinders the scale-up of the production, while the harsh operating conditions also reduce the quality of the product.
SUMMERY OF THE UTILITY MODEL
To this problem, the utility model provides a gaseous driven laminar material stripping off device, gaseous driven laminar material stripping off device peel off the pipe high-speed motion by pneumatic drive liquid in the spiral, under mild condition, can reach the laminar material and peel off required minimum shear rate, the device simple structure, operating condition is mild, the two-dimensional material quality that obtains is high, but wide application in the peeling off of laminar materials such as graphite alkene, boron nitride.
The pneumatically driven layered material spiral stripping device comprises a liquid raw material storage tank, a feed pump, a compressed gas source, a tee joint, a spiral stripping pipe, a gas-liquid separator, an intermediate liquid storage tank and a product storage tank; the inlet of the feed pump is connected with the liquid raw material storage tank, the outlet of the feed pump is connected with the inlet of the spiral stripping pipe, and the outlet of the spiral stripping pipe is connected with the inlet of the gas-liquid separator through the tee joint; the gas-liquid separator is provided with a gas outlet and a liquid outlet, the liquid outlet of the gas-liquid separator is connected with the inlet of the intermediate liquid storage tank, and the outlet of the intermediate liquid storage tank is respectively connected with the inlet of the feed pump and the product storage tank; the compressed gas source is respectively communicated with the feeding pump and the spiral stripping pipe through a tee joint; a feed flow control valve and a liquid flowmeter are arranged between the feed pump and the tee joint; a gas flowmeter, a gas flow control valve and a gas pressure gauge are arranged between the compressed gas source and the tee joint, and the gas pressure gauge is arranged between the gas flow control valve and the tee joint; a first valve is arranged between the liquid raw material storage tank and the feeding pump, a second valve is arranged between the intermediate liquid storage tank and the feeding pump, the first valve can independently control the feeding of the raw materials in the raw material storage tank, and the second valve can independently control the feeding of the intermediate liquid in the intermediate liquid storage tank; and a third valve and a discharge pump are arranged between the intermediate liquid storage tank and the product storage tank.
Further, the feeding pump is preferably a plunger pump, a diaphragm pump or a centrifugal pump.
Further, the compressed gas source is preferably a gas compressor or a gas cylinder.
Further, the spiral stripping pipe is a spiral stainless steel pipe with the radius of 2-5000mm, the inner diameter of the stainless steel pipe is 0.1-1000mm, and the total length is 0.1-100 m.
Still further, preferably, the inner diameter of the spiral peeling pipe is 1 to 10mm, the radius of the spiral is 2 to 50mm, and the total length of the spiral pipe is 1 to 10 m.
Still further, the stripping off device of the utility model is applied to the stripping off of the layered materials.
Further, the application is as follows:
(1) dispersing the layered material in a solvent, fully stirring to obtain a dispersion liquid of the layered material, and placing the dispersion liquid in a liquid raw material storage tank; the concentration of the layered material is 1-200 g/L;
(2) opening a feeding pump and a compressed gas source, then opening a valve I, closing a valve II and a valve III, opening a gas flow control valve, mixing the layered material dispersion liquid and the compressed gas through a tee joint, introducing the mixture into a spiral stripping pipe, and carrying out a stripping reaction in the spiral stripping pipe; the flow ratio of the layered material dispersion liquid to the compressed gas is 1: 5-100;
(3) the gas-liquid mixture flowing out of the spiral stripping pipe enters an inlet of a gas-liquid separator, gas in the gas-liquid mixture is emptied from a gas outlet, and liquid in the gas-liquid mixture flows into an intermediate liquid storage tank from a liquid outlet to obtain a primary stripped layered material dispersion liquid;
(4) after the dispersion liquid of all the layered materials in the liquid raw material storage tank is subjected to the step (3) to obtain the primary peeled layered material dispersion liquid, closing the first valve, opening the second valve, continuously introducing the primary peeled layered material dispersion liquid into the inlet of the feeding pump, refluxing the primary peeled layered material dispersion liquid into the spiral peeling pipe to form a circulating system, circulating for 5-240 minutes to obtain the circularly peeled dispersion liquid, closing the second valve, opening the third valve, and introducing the circularly peeled dispersion liquid into a product storage tank;
(5) collecting the circularly stripped dispersion liquid, centrifuging for 5-120 min at 500-1000rpm, taking supernatant, and freeze drying to obtain the layered material powder.
Further, the layered material is graphite, massive molybdenum disulfide or boron nitride.
Further, the gas type of the compressed gas source is one of air, nitrogen, carbon dioxide, oxygen, argon or helium.
Further, the flow rate of the layered material dispersion liquid is 0.01-10000L/h; the flow rate of the compressed gas is 0.1-100000L/h.
Further, in the step (1), the solvent may be one of organic solvents or a mixture of organic solvents in a volume ratio of 1: 1-10 or a mixed solvent of any two of them in a volume ratio of 1: a mixed solution of any one of 0.1 to 10 of organic solvents and water; the organic solvent is acetone, chloroform, isopropanol, ethanol, N-butanol, dimethyl sulfoxide, benzene, hexafluorobenzene, N-methylpyrrolidone, N-dimethylformamide, chlorosulfonic acid and methanesulfonic acid.
Furthermore, the laminar material dispersion liquid driven by air moves at high speed in the spiral stripping pipe, so that the minimum shear rate required by the stripping of the laminar material can be achieved, and the stripping of the laminar material is realized;
further, in the step (2), the higher the gas flow rate is, the more remarkable the peeling effect on the layered material is;
furthermore, in the step (4), the cycle time has a significant influence on the peeling effect of the layered material, and the longer the cycle time is, the better the peeling effect is, and the higher the yield of the layered material is.
Compared with the prior art, the beneficial effects of the utility model are that: the device has simple structure and mild operation condition, does not need high-pressure or high-speed stirring, obtains high-quality products, and can be widely applied to stripping of layered materials such as graphene, boron nitride and the like.
Drawings
Fig. 1 is a schematic view of the device of the present invention.
Description of reference numerals: 1-a raw material storage tank; 2-a feed pump; 3-a feed flow control valve; 4-a liquid flow meter; 5-a source of compressed gas; 6-gas flow control valve; 7-a gas flow meter; 8-gas pressure gauge; 9-a tee joint; 10-helical stripping tube; 11-a gas-liquid separator; 12-an intermediate liquid storage tank; 13-product storage tank, 14-valve III, 15-discharge pump, 16-valve II, 17-valve I.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the utility model discloses
The device comprises a liquid raw material storage tank 1, a feeding pump 2, a compressed gas source 5, a tee joint 9, a spiral stripping pipe 10, a gas-liquid separator 11, a liquid intermediate storage tank 12 and a product storage tank 13; the inlet of the feed pump 2 is connected with the liquid raw material storage tank 1, the outlet of the feed pump 2 is connected with the inlet of the spiral stripping pipe 10 through the tee joint 9, and the outlet of the spiral stripping pipe 10 is connected with the inlet of the gas-liquid separator 11; the gas-liquid separator 11 is provided with a gas outlet and a liquid outlet; a liquid outlet of the gas-liquid separator 11 is connected with an inlet of an intermediate liquid storage tank 12, and an outlet of the intermediate liquid storage tank 12 is respectively connected with an inlet of the feed pump 2 and a product storage tank 13; the compressed gas source 5 is respectively communicated with the feed pump 2 and the spiral stripping pipe 10 through a tee joint 9; a liquid flow meter 4 is arranged between the feed pump 2 and the tee joint 9; a gas flowmeter 7, a gas flow control valve 6 or a gas pressure gauge 8 are arranged between the compressed gas source 5 and the tee joint 9, and the gas pressure gauge 8 is arranged between the gas flow control valve 6 and the tee joint; a first valve 17 is arranged between the raw material storage tank 1 and the feeding pump 2, a second valve 16 is arranged between the intermediate liquid storage tank 12 and the feeding pump 2, the first valve 17 can independently control the feeding of the raw materials in the raw material storage tank 1, and the second valve 16 can independently control the feeding of the intermediate liquid in the intermediate liquid storage tank 12; a third valve 14 and a discharge pump 15 are arranged between the intermediate liquid storage tank 12 and the product storage tank 13; the stripping device is of a closed structure.
Referring to the attached drawings, the utility model discloses during operation, raw materials dispersion feed pump carries and gets into the tee bend to join the back with the gas that comes from the compressed gas source, get into the spiral pipe stripper, the gas-liquid mixture that comes out from the spiral pipe is through gas-liquid separation, and the liquid phase is carried to the feed pump entry, makes the feed liquid at the spiral circulation, thereby peels off raw materials wherein and becomes two-dimentional nano-material.
The following is an example of the use of the apparatus of the present invention for delaminating layered materials.
Graphite is dispersed in N-methyl pyrrolidone to prepare graphite suspension with the concentration of 80mg/ml, the graphite suspension is conveyed to a tee joint at the flow rate of 20L/h by a plunger pump and is converged with air from an air compressor at the flow rate of 2400L/h, after gas-liquid convergence, the graphite suspension enters a spiral stripper with the pipe inner diameter of 3mm, the spiral radius of 2.5mm and the length of 1m, a gas-liquid mixture discharged from a spiral pipe is separated by a gas-liquid separator, the liquid in the gas-liquid mixture is conveyed to the inlet of the plunger pump, the circulation is carried out for 120 minutes, and graphene with the average layer number of 2 layers can be obtained by centrifugation and freeze drying.
Example 2
The method comprises the steps of dispersing hexagonal boron nitride in 50% volume fraction ethanol aqueous solution to prepare boron nitride suspension with the concentration of 50mg/ml, conveying the boron nitride suspension to a tee joint at the flow rate of 15L/h by using a plunger pump, converging the boron nitride suspension with air from an air compressor at the flow rate of 3000L/h, introducing the gas-liquid mixture into a spiral stripper with the pipe inner diameter of 1mm, the spiral radius of 1mm and the length of 5m after the gas-liquid convergence, separating the gas-liquid mixture from a spiral pipe by using a gas-liquid separator, conveying the liquid to the inlet of the plunger pump, circulating for 100 minutes in this way, and obtaining the boron nitride with the average layer number of 2 layers by centrifuging and freeze-drying.
Example 3
Dispersing blocky molybdenum disulfide in N-methyl pyrrolidone to prepare molybdenum disulfide suspension with the concentration of 20mg/ml, conveying the molybdenum disulfide suspension to a tee joint at the flow rate of 20L/h by using a plunger pump, converging the molybdenum disulfide suspension with the flow rate of 2000L/h by using an air compressor, introducing the gas-liquid mixture into a spiral stripper with the pipe inner diameter of 0.5mm, the spiral radius of 2mm and the length of 20m after the gas-liquid convergence, separating a gas-liquid mixture from a spiral pipe by using a gas-liquid separator, conveying the liquid to the inlet of the plunger pump, circulating for 60 minutes in this way, and obtaining the molybdenum disulfide with the average layer number of 3 layers by centrifuging and freeze-drying.
Claims (4)
1. A gas-driven layered material peeling device is characterized in that: comprises a liquid raw material storage tank (1), a feeding pump (2), a compressed gas source (5), a tee joint (9), a spiral stripping pipe (10), a gas-liquid separator (11), an intermediate liquid storage tank (12) and a product storage tank (13); the inlet of the feed pump (2) is connected with the liquid raw material storage tank (1), the outlet of the feed pump (2) is connected with the inlet of the spiral stripping pipe (10) through the tee joint (9), and the outlet of the spiral stripping pipe (10) is connected with the inlet of the gas-liquid separator (11); a gas outlet and a liquid outlet are arranged on the gas-liquid separator (11), the liquid outlet of the gas-liquid separator (11) is connected with an inlet of an intermediate liquid storage tank (12), and an outlet of the intermediate liquid storage tank (12) is respectively connected with an inlet of the feed pump (2) and a product storage tank (13); the compressed gas source (5) is respectively communicated with the feed pump (2) and the spiral stripping pipe (10) through a tee joint (9); a feeding flow control valve (3) and a liquid flowmeter (4) are arranged between the feeding pump (2) and the tee joint (9); a gas flowmeter (7), a gas flow control valve (6) and a gas pressure gauge (8) are arranged between the compressed gas source (5) and the tee joint (9), and the gas pressure gauge (8) is arranged between the gas flow control valve (6) and the tee joint (9); a first valve (17) is arranged between the liquid raw material storage tank (1) and the feeding pump (2), a second valve (16) is arranged between the intermediate liquid storage tank (12) and the feeding pump (2), the first valve (17) can independently control the feeding of the raw materials in the liquid raw material storage tank (1), and the second valve (16) can independently control the feeding of the intermediate liquid in the intermediate liquid storage tank (12); a valve III (14) and a discharge pump (15) are arranged between the intermediate liquid storage tank (12) and the product storage tank (13).
2. The peeling apparatus as claimed in claim 1, wherein: the feeding pump (2) is a plunger pump, a diaphragm pump or a centrifugal pump.
3. The peeling apparatus as claimed in claim 1, wherein: the compressed gas source (5) is a gas compressor or a gas steel cylinder.
4. The peeling apparatus as claimed in claim 1, wherein: the spiral stripping pipe (10) is a spiral stainless steel pipe with the radius of 2-5000mm, the inner diameter of the stainless steel pipe is 0.1-1000mm, and the total length is 0.1-100 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822277060.4U CN210367000U (en) | 2018-12-31 | 2018-12-31 | Gas-driven layered material stripping device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822277060.4U CN210367000U (en) | 2018-12-31 | 2018-12-31 | Gas-driven layered material stripping device |
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| CN210367000U true CN210367000U (en) | 2020-04-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111377436A (en) * | 2018-12-31 | 2020-07-07 | 浙江工业大学 | Gas-driven layered material stripping device and stripping method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111377436A (en) * | 2018-12-31 | 2020-07-07 | 浙江工业大学 | Gas-driven layered material stripping device and stripping method |
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