CN102398897B - Method for preparing two-dimensional nano boron nitride with jet flow cavitation technology - Google Patents
Method for preparing two-dimensional nano boron nitride with jet flow cavitation technology Download PDFInfo
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Abstract
The invention discloses a method for two-dimensional nano boron nitride with a jet flow cavitation technology. The method comprises the following seven steps of: 1, preparing three kinds of raw materials such as boron nitride powder and the like into a boron nitride aqueous solution according to a certain weight ratio, putting the solution into a material storing tank; 2, making the boron nitrideaqueous solution enter a plunger pump from the material storing tank, and pressurizing the solution to a specified pressure; 3, making the boron nitride aqueous solution enter a cavitation generator for lamellar striping to obtain a solution containing single-layer and multi-layer two-dimensional nano boron nitride; 4, cooling the solution containing single-layer or multi-layer two-dimensional nano boron nitride to the room temperature with water; 5, making the solution obtained in the step 4 reenter the material storing tank, the plunger pump and the cavitation generator, and repeating the steps 3 and 4 to form a cycle of the preparation process; 6, running a system for 5-100 minutes till processing is finished, and shutting down the system; and 7, taking the solution obtained in the step 6 out of the material storing tank, and pouring into a precipitating tank for precipitating to obtain supernatant fluid, i.e., the needed two-dimensional nano boron nitride solution. The method has the advantages of advanced process, low cost, no pollution and realization of industrial large-scale production.
Description
Technical field
The present invention relates to a kind of method of preparing two-dimensional nano boron nitride with jet flow cavitation technology, it belongs to a kind of technology of utilizing mechanical process efficiently to prepare the two-dimensional nano boron nitride, is specifically related to preparation facilities and the method for two-dimensional nano boron nitride.
Background technology
The elementary cell of nano material can be divided into zero dimension, a peacekeeping two-dimensional nano material according to space dimensionality.Wherein the two-dimensional nano material refers to that the space three-dimensional yardstick only has one dimension at the material of nanometer scale.In numerous nano materials, the special nano level stratiform structure that inorganic layered compounds obtains begins to cause people's broad interest, it not only can be for many chemical reactions provide unique nano level reaction compartment, and the nano level monolithic layer after it is peeled off can also be as the elementary cell of other new nanostructure of preparation.In recent years, the structure of this type of nano material and performance have become the important research direction in the nanometer material science research field.
Boron nitride is that the typical inorganic lamellar compound represents one of material.It is that wherein the crystalline structure of hexagonal boron nitride has the laminate structure of similar graphite by the crystal of nitrogen-atoms and boron atomic building, so be called again " white graphite ".Boron nitride has good electrical insulating property, thermal conductivity, the excellent properties such as chemical stability, the two-dimensional nano boron nitride material has broad application prospects at numerous areas such as ion-exchange, absorption, conduction, separation and catalysis simultaneously, becomes the focus of domestic and international research.Although the prospect of two-dimensional nano boron nitride is very tempting, but still many challenging problems that have are arranged, wherein the preparation of two-dimensional nano boron nitride is exactly the most basic in all problems, if can't high-efficient simple prepare two-dimensional nano boron nitride all considerable on the Quality and yield, so about the otherwise research of two-dimensional nano boron nitride with use and will be very limited.Equally, realize using value and the economic benefit of two-dimensional nano boron nitride, just must consider two-dimensional nano boron nitride preparation technology's output and efficient, from this point of view, extensive, high-level efficiency, low cost, contamination-freely manufacture two-dimensional nano boron nitride is current and following the pursuing a goal of people.
The preparation method of two-dimensional nano boron nitride mainly contains arc discharge method, solvent-thermal method, vapour deposition process and liquid phase method at present, although wherein arc discharge method, solvent-thermal method and vapour deposition process can be prepared high-quality two-dimensional nano boron nitride, but owing to preparation method's restriction, can not satisfy the needs of a large amount of production two-dimensional nano boron nitride.Recently, external correlative study has the report of preparation two-dimensional nano boron nitride in liquid phase, atomic force microscope (AFM) picture from its report can be seen, the two-dimensional nano boron nitride quality of these method preparations is perfect not enough, but, in liquid phase, directly disperse and peel off boron nitride may be low-cost, prepare the effective ways of two-dimensional nano boron nitride on a large scale.
Summary of the invention
1, purpose: the purpose of this invention is to provide a kind of method of preparing two-dimensional nano boron nitride with jet flow cavitation technology, this processing method can effectively promote and promote extensive, high-level efficiency, low cost, the CR production of two-dimensional nano boron nitride.Adopt the two-dimensional nano boron nitride of production technique of the present invention preparation, have simple and easy, safety, non-oxidation, need not high temperature, environmental friendliness, characteristics that output is considerable, more be fit to the large-scale industrialization production of high-quality two-dimensional nano boron nitride.
2, technical scheme:
1) method of the present invention, its employed device is described below first:
As shown in Figure 1, a kind of device of preparing two-dimensional nano boron nitride with jet flow cavitation technology, this device is comprised of storage tank, inhalent siphon, valve, motor, ram pump, tensimeter, high pressure pipe, cavitation producer, water-circulating cooling device and return line etc.Position annexation between them is: the outlet of storage tank is connected with the inlet end of inhalent siphon, and the exit end of inhalent siphon is connected with the water inlet of ram pump; Valve installation is on inhalent siphon, and ram pump is by coupled electric motor driving, and its operating pressure is shown by the tensimeter that connects on it; The water outlet of ram pump is connected with the water inlet of high pressure pipe, and the water outlet of high pressure pipe is connected with the water inlet of cavitation producer; The water outlet of cavitation producer is connected with the water inlet of return line, and the water outlet of return line is connected with the entrance of storage tank, forms the circulation preparation system; Water-circulating cooling device is installed on the return line.
Described cavitation producer is seen Fig. 2, Fig. 3, and it has two kinds of structure types, and high-pressure spray can form cavitation jet by the cavitation producer, and then prepares the two-dimensional nano boron nitride; Wherein, described cavitation producer, its profile is cylindrical shape, and inside is comprised of 2 ~ 6 small-bore straight section through holes and 2 ~ 6 wide aperture straight section through holes; The diameter of described small-bore straight section through hole is 0.01mm ~ 30mm, and the diameter of described wide aperture straight section through hole is 0.1mm ~ 200mm; The degree of depth of described small-bore straight section through hole is 2mm ~ 300mm, and the degree of depth of described wide aperture straight section through hole is 2mm ~ 50mm.
Wherein, described cavitation producer, its profile is cylindrical shape, the inner straight section through hole that is increased gradually by an aperture forms, its diameter minute 2 ~ 5 stages increase gradually, and the diameter of different steps is followed successively by from small to large: 0.01mm ~ 30mm, 0.03mm ~ 50mm, 0.05mm ~ 70mm, 0.07mm ~ 90mm, 0.1 ~ 100mm; The degree of depth of the straight section through hole in each stage is 2mm ~ 300mm.
Wherein, the material of described cavitation producer is metal or pottery.
2) method of a kind of preparing two-dimensional nano boron nitride with jet flow cavitation technology of the present invention, this processing method is, at first in storage tank, add the good boron nitride solution of dispersion stabilization, this solution is comprised of boron nitride powder, dispersion agent or surface-modifying agent and water, enter ram pump by inhalent siphon, enter the cavitation producer by high pressure pipe again after the pressurization; By the effect of Hydrodynamic cavitation and shape sudden change cavitation, the microjet of generation and shock wave make the boron nitride limellar stripping on the boron nitride body, prepare high-quality two-dimensional nano boron nitride in the cavitation producer; Make whole preparation process form closed cycle by return line at last, the cavatition of liquid through moving in circles just can constantly be peeled off the boron nitride sheet, thereby can easily prepare the two-dimensional nano boron nitride of individual layer and multilayer; Details are as follows for this processing method:
The method of a kind of preparing two-dimensional nano boron nitride with jet flow cavitation technology of the present invention, the method includes following steps:
Step 1: be that 0.01% ~ 5% dispersion agent or surface-modifying agent, weight ratio are that 85% ~ 99% water mixes with weight ratio is 0.1% ~ 10%, mean particle size is 10 μ m ~ 50 μ m boron nitride powder, weight ratio, prepare the good boron nitride aqueous solution of dispersion stabilization, put into storage tank;
Step 2: the operating pressure of setting ram pump is 3MPa ~ 80MPa, opens inhalent siphon place valve, and the boron nitride aqueous solution enters ram pump by storage tank, opens the electric system operation, and the boron nitride aqueous solution is pressurized to specified pressure, and its pressure range is 3MPa ~ 80MPa;
Step 3: the boron nitride aqueous solution after the pressurization enters in the cavitation producer by high pressure pipe, boron nitride particle in the solution the peeling off of generating plate layer under the effect of cavitation force, obtain containing the solution of individual layer and multilayer two-dimension nm-class boron nitride, the described solution that contains individual layer and multilayer two-dimension nm-class boron nitride is the mixed aqueous solution of individual layer two-dimensional nano boron nitride, multilayer two-dimension nm-class boron nitride, boron nitride particle;
Step 4: the solution that contains individual layer and multilayer two-dimension nm-class boron nitride that obtains through step 3 enters return line by the water outlet of cavitation producer, this moment, fluid temperature was higher, under the effect of water-circulating cooling device, the temperature that contains the solution of individual layer and multilayer two-dimension nm-class boron nitride returns to about room temperature;
Step 5: the solution that contains individual layer and multilayer two-dimension nm-class boron nitride that obtains through step 4 is through the water outlet of return line, enter storage tank, again enter ram pump and cavitation producer etc. by inhalent siphon, repeating step three and step 4 form the circulation of preparation process;
Step 6: system operation 5min ~ 100min post-treatment is finished, and disable motor, the solution in the valve-off, this moment storage tank are the solution of crossing through cavitation process repeatedly;
Step 7: take out the solution that obtains through step 6 from storage tank, pour setting tank into, after precipitation, take out supernatant liquor with the method for siphon or overflow, its supernatant liquor is the two-dimensional nano boron nitride solution that contains a large amount of individual layers, bilayer, multilayer mixing.
Wherein, the dispersion agent described in the step 1 is Xylo-Mucine or sodium lauryl sulphate.
Wherein, the surface-modifying agent described in the step 1 is Xylo-Mucine or sodium lauryl sulphate.
3, advantage and effect: the advantage of the method for a kind of preparing two-dimensional nano boron nitride with jet flow cavitation technology of the present invention is: 1, can by the force value of pilot plunger pump, the cavitation force size that is applied between the boron nitride layer be regulated.2, by the cavatition that moves in circles of certain hour, can realize farthest producing the two-dimensional nano boron nitride.3, whole preparation process is simple, and production cost is low, and is pollution-free, can realize the purpose that large-scale industrialization is produced.
Description of drawings
Fig. 1 is that the employed device of method of the present invention is the device synoptic diagram that the jet flow cavitation method prepares the two-dimensional nano boron nitride.
Fig. 2 is the structural representation of device cavitation producer used in the present invention (I).
Fig. 3 is the structural representation of device cavitation producer used in the present invention (II).
Fig. 4 is preparation method's of the present invention FB(flow block).
Number in the figure and code name are described as follows:
Among Fig. 1: 1. storage tank 2. inhalent siphons 3. valves 4. motors
5. ram pump 6. tensimeters 7. high pressure pipes 8. cavitation producers
9. water-circulating cooling device 10. return lines
Among Fig. 2: d
0: the diameter d of small-bore straight section through hole
1: the diameter of wide aperture straight section through hole
A, b, c: via depth
Arrow represent solution stream to
Among Fig. 3: d
0, d
1, d
2, d
3: the diameter of the straight section through hole that the aperture increases gradually
A, b, c, e: via depth
Arrow represent solution stream to
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Referring to shown in Figure 1, the employed device of method of the present invention is a kind of device of preparing two-dimensional nano boron nitride with jet flow cavitation technology, mainly is comprised of storage tank 1, inhalent siphon 2, valve 3, motor 4, ram pump 5, tensimeter 6, high pressure pipe 7, cavitation producer 8, water-circulating cooling device 9 and return line 10 etc.
The outlet of storage tank 1 is connected with the inlet end of inhalent siphon 2, and the exit end of inhalent siphon 2 is connected with the water inlet of ram pump 5;
Valve 3 is installed on the inhalent siphon 2, and ram pump 5 is driven by motor 4, and its operating pressure is shown by tensimeter 6;
The water outlet of ram pump 5 is connected with the water inlet of high pressure pipe 7, and the water outlet of high pressure pipe 7 is connected with the water inlet of cavitation producer 8;
The water outlet of cavitation producer 8 is connected with the water inlet of return line 10, and the water outlet of return line 10 is connected with the entrance of storage tank 1, forms the circulation preparation system;
Water-circulating cooling device 9 is installed on the return line 10.
Described storage tank 1 is that the plain metal structural capacity is 1 cube V-arrangement storage tank; It is placed with boron nitride, dispersion agent or surface-modifying agent and water.
Described inhalent siphon 2 is that commercial caliber is the weldless steel tube of Φ 24mm;
Described valve 3 is commercial check valves that match with inhalent siphon 2;
Described motor 4 is that commercial model is the motor of Y200L-4;
Described ram pump 5 is that commercial model is the ram pump of 3W60-1.2/70;
Described tensimeter 6 is that commercial maximum amount journey is the tensimeter of 100MPa;
Described high pressure pipe 7 is commercial high pressure hoses, and internal diameter is Φ 12mm;
Described cavitation producer 8 has two kinds of structure types, and its profile is cylindrical shape, and as shown in Figure 2, its inside is comprised of 2 ~ 6 small-bore straight section through holes and 2 ~ 6 wide aperture straight section through holes; The diameter d of described small-bore straight section through hole
0Be 0.01mm ~ 30mm, the diameter d of described wide aperture straight section through hole
1Be 0.1mm ~ 200mm; The degree of depth a=2mm of described small-bore straight section through hole ~ 300mm, c=2mm ~ 50mm, the degree of depth b of described wide aperture straight section through hole is 2mm ~ 50mm.
The another kind of structure type of described cavitation producer 8, as shown in Figure 3, its inside is comprised of the straight section through hole that an aperture increases gradually, and its diameter minute 2 ~ 5 stages increase gradually, and the diameter of different steps is followed successively by from small to large: d
0=0.01mm ~ 30mm, d
1=0.03mm ~ 50mm, d
2=0.05mm ~ 70mm, d
3=0.07mm ~ 90mm; The degree of depth of straight section through hole is a=2mm ~ 300mm, b=2mm ~ 100mm, c=2mm ~ 100mm, e=2mm ~ 100mm.
The material of described cavitation producer 8 is metal or pottery.
Described water-circulating cooling device 9 is commercial water cooling plant;
Described return line 10 is that commercial caliber is the weldless steel tube of Φ 12.
The present invention utilizes the jet flow cavitation method to prepare the two-dimensional nano boron nitride, and the principle that jet flow cavitation prepares the two-dimensional nano boron nitride is, has higher pressure difference between the import and export of cavitation producer, and this pressure difference will produce hydrodynamical cavitation in liquid; Cavitation producer geometric catastrophe will be induced cavitation how much in liquid; The cavitation of this brute force can produce in the boron nitride surface pulse microjet and shockwave, this pulsed force function will be propagated in the mode of stress waves in soils in the boron nitride surface, when propagating into solid-liquid interface, according to theory of stress wave, after the stress incident wave arrives solid-liquid interface, can be reflected back the tensile stress ripple in the boron nitride body, mainly be that this tensile stress is peeled off the boron nitride sheet.
In this cavatition process, can produce a large amount of heat, so that the boron nitride aqueous temperature raises, therefore at return line 10 water-circulating cooling device 9 has been installed, in order to reduce solution temperature, so that the circulation of system is achieved.
As shown in Figure 4, the method for a kind of preparing two-dimensional nano boron nitride with jet flow cavitation technology of the present invention comprises following concrete steps:
The first step: be that 10 μ m ~ boron nitride powder of 50 μ m, 0.01% ~ 5% dispersion agent or surface-modifying agent (Xylo-Mucine or sodium lauryl sulphate), 85% ~ 99% water mix with 0.1% ~ 10% mean particle size, prepare the good boron nitride aqueous solution of dispersion stabilization, put into storage tank 1;
Second step: the operating pressure of setting ram pump 5 is 3MPa ~ 80MPa, opens inhalent siphon 2 place's valves 3, and the boron nitride aqueous solution enters ram pump 5 by storage tank 1, opens the operation of motor 4 systems, and the boron nitride aqueous solution is pressurized to specified pressure 3MPa ~ 80MPa;
The 3rd step: two types cavitation producer is arranged, respectively as shown in Figures 2 and 3 in Fig. 1 device.The boron nitride aqueous solution after the pressurization enters in the cavitation producer 8 by high pressure pipe 7, and the peeling off of generating plate layer under the effect of cavitation force of the boron nitride particle in the solution obtains containing the solution of individual layer and multilayer two-dimension nm-class boron nitride; The described solution that contains individual layer and multilayer two-dimension nm-class boron nitride is the mixed aqueous solution of individual layer two-dimensional nano boron nitride, multilayer two-dimension nm-class boron nitride, boron nitride particle;
The 4th step: the solution that contains individual layer and multilayer two-dimension nm-class boron nitride that obtains through step 3 enters return line 10 by the water outlet of cavitation producer 8, this moment fluid temperature higher (about 40 ℃-100 ℃), under the effect of water-circulating cooling device 9, the temperature that contains the solution of individual layer and multilayer two-dimension nm-class boron nitride returns to about room temperature;
The 5th step: the solution that contains individual layer and multilayer two-dimension nm-class boron nitride that obtains through step 4 is through the water outlet of return line 10, enter storage tank 1, again enter ram pump 5 and cavitation producer 8 etc. by inhalent siphon 2, repeating step three and step 4 form the circulation of preparation process;
The 6th step: behind system operation 5min ~ 100min, disable motor 4, the solution in the valve-off 3 etc., this moment storage tank 1 are the solution of crossing through cavitation process repeatedly;
The 7th step: from storage tank 1, take out the solution that obtains through step 6, pour setting tank into, through precipitating 0.5 day ~ after 7 days, taking out supernatant liquor with the method for siphon or overflow, its supernatant liquor is the two-dimensional nano boron nitride solution that contains a large amount of individual layers, bilayer, multilayer mixing.
Embodiment one:
Adopt the jet flow cavitation device as shown in Figure 1, the cavitation producer as shown in Figure 2, the technique of utilizing the jet flow cavitation method to prepare the two-dimensional nano boron nitride is:
The first step: the boron nitride powder with 1.9%, 0.1% properties-correcting agent and 98% water, prepare the good boron nitride aqueous solution of dispersion stabilization, put into storage tank 1, wherein the boron nitride powder mean particle size is 12 μ m, properties-correcting agent is selected Xylo-Mucine (CMC);
Second step: the operating pressure of setting ram pump 5 is 20Mpa, opens inhalent siphon 2 place's valves 3, and the boron nitride aqueous solution enters ram pump 5 by storage tank 1, opens the operation of motor 4 systems, and the boron nitride aqueous solution is pressurized to specified pressure 20Mpa; The power of described motor 4 is 30KW;
The 3rd step: the boron nitride aqueous solution after the pressurization enters in the cavitation producer 8 by high pressure pipe 7, and the peeling off of generating plate layer under the effect of cavitation force of the boron nitride particle in the solution obtains containing the solution of individual layer and multilayer two-dimension nm-class boron nitride; The described solution that contains individual layer and multilayer two-dimension nm-class boron nitride is the mixed aqueous solution of individual layer two-dimensional nano boron nitride, multilayer two-dimension nm-class boron nitride, boron nitride particle;
The 4th step: the solution that contains individual layer and multilayer two-dimension nm-class boron nitride that obtains through step 3 enters return line 10 by the water outlet of cavitation producer 8, this moment, fluid temperature was higher, under the effect of water-circulating cooling device 9, the temperature that contains individual layer and multilayer two-dimension nano silicon nitride B solution returns to about room temperature;
The 5th step: contain individual layer and multilayer two-dimension nano silicon nitride B solution through the water outlet of return line 10 through what step 4 obtained, enter storage tank 1, again enter ram pump 5 and cavitation producer 8 etc. by inhalent siphon 2, repeating step three and step 4 form the circulation of preparation process; The cavatition of liquid through moving in circles can constantly be peeled off the boron nitride sheet, thereby can easily prepare the two-dimensional nano boron nitride of individual layer and multilayer;
The 6th step: behind the system operation 30min, disable motor 4, the solution in the valve-off 3 etc., this moment storage tank 1 are the solution of crossing through cavitation process repeatedly;
The 7th step: take out the solution that obtains through step 6 from storage tank 1, pour setting tank into, after precipitating 1 day, take out supernatant liquor with the method for siphon, its supernatant liquor is the two-dimensional nano boron nitride solution that contains a large amount of individual layers, bilayer, multilayer mixing.
Embodiment two:
Adopt the jet flow cavitation device as shown in Figure 1, the cavitation producer as shown in Figure 3, the technique of utilizing the jet flow cavitation method to prepare the two-dimensional nano boron nitride is:
The first step: the boron nitride powder with 4.9%, 3.1% sodium lauryl sulphate and 92% water, prepare the good boron nitride aqueous solution of dispersion stabilization, put into storage tank 1, wherein the boron nitride powder mean particle size is 25 μ m;
Second step: the operating pressure of setting ram pump 5 is 40MPa, opens inhalent siphon 2 place's valves 3, and the boron nitride aqueous solution enters ram pump 5 by storage tank 1, opens the operation of motor 4 systems, and the boron nitride aqueous solution is pressurized to specified pressure 40Mpa;
The power of described motor 4 is 30KW;
The 3rd step: the boron nitride aqueous solution after the pressurization enters in the cavitation producer 8 by high pressure pipe 7, and the peeling off of generating plate layer under the effect of cavitation force of the boron nitride particle in the solution obtains containing the solution of individual layer and multilayer two-dimension nm-class boron nitride; The described solution that contains individual layer and multilayer two-dimension nm-class boron nitride is the mixed aqueous solution of individual layer two-dimensional nano boron nitride, multilayer two-dimension nm-class boron nitride, boron nitride particle;
The 4th step: the solution that contains individual layer and multilayer two-dimension nm-class boron nitride that obtains through step 3 enters return line 10 by the water outlet of cavitation producer 8, this moment, fluid temperature was higher, under the effect of water-circulating cooling device 9, the temperature that contains the solution of individual layer and multilayer two-dimension nm-class boron nitride returns to about room temperature;
The 5th step: the solution that contains individual layer and multilayer two-dimension nm-class boron nitride that obtains through step 4 is through the water outlet of return line 10, enter storage tank 1, again enter ram pump 5 and cavitation producer 8 etc. by inhalent siphon 2, repeating step three and step 4 form the circulation of preparation process; The cavatition of liquid through moving in circles can constantly be peeled off the boron nitride sheet, thereby can easily prepare the two-dimensional nano boron nitride of individual layer and multilayer;
The 6th step: behind the system operation 60min, disable motor 4, the solution in the valve-off 3 etc., this moment storage tank 1 are the solution of crossing through cavitation process repeatedly;
The 7th step: take out the solution that obtains through step 6 from storage tank 1, pour setting tank into, after precipitating 3 days, take out supernatant liquor with the method for siphon, its supernatant liquor is the two-dimensional nano boron nitride solution that contains a large amount of individual layers, bilayer, multilayer mixing.
Embodiment three:
Adopt the jet flow cavitation device as shown in Figure 1, the cavitation producer as shown in Figure 2, the technique of utilizing the jet flow cavitation method to prepare the two-dimensional nano boron nitride is:
The first step: the boron nitride powder with 9.1%, 4.9% sodium lauryl sulphate and 86% water, prepare the good boron nitride aqueous solution of dispersion stabilization, put into storage tank 1, wherein the boron nitride powder mean particle size is 45 μ m;
Second step: the operating pressure of setting ram pump 5 is 70MPa, opens inhalent siphon 2 place's valves 3, and the boron nitride aqueous solution enters ram pump 5 by storage tank 1, opens the operation of motor 4 systems, and the boron nitride aqueous solution is pressurized to specified pressure 70Mpa; The power of described motor 4 is 30KW;
The 3rd step: the boron nitride aqueous solution after the pressurization enters in the cavitation producer 8 by high pressure pipe 7, and the peeling off of generating plate layer under the effect of cavitation force of the boron nitride particle in the solution obtains containing the solution of individual layer and multilayer two-dimension nm-class boron nitride; The described solution that contains individual layer and multilayer two-dimension nm-class boron nitride is the mixed aqueous solution of individual layer two-dimensional nano boron nitride, multilayer two-dimension nm-class boron nitride, boron nitride particle;
The 4th step: the solution that contains individual layer and multilayer two-dimension nm-class boron nitride that obtains through step 3 enters return line 10 by the water outlet of cavitation producer 8, this moment, fluid temperature was higher, under the effect of water-circulating cooling device 9, the temperature that contains the solution of individual layer and multilayer two-dimension nm-class boron nitride returns to about room temperature;
The 5th step: the solution that contains individual layer and multilayer two-dimension nm-class boron nitride that obtains through step 4 is through the water outlet of return line 10, enter storage tank 1, again enter ram pump 5 and cavitation producer 8 etc. by inhalent siphon 2, repeating step three and step 4 form the circulation of preparation process; The cavatition of liquid through moving in circles can constantly be peeled off the boron nitride sheet, thereby can easily prepare the two-dimensional nano boron nitride of individual layer and multilayer;
The 6th step: behind the system operation 90min, disable motor 4, the solution in the valve-off 3 etc., this moment storage tank 1 are the solution of crossing through cavitation process repeatedly;
The 7th step: take out the solution that obtains through step 6 from storage tank 1, pour setting tank into, after precipitating 7 days, take out supernatant liquor with the method for siphon, its supernatant liquor is the two-dimensional nano boron nitride solution that contains a large amount of individual layers, bilayer, multilayer mixing.
Claims (5)
1. the method for a preparing two-dimensional nano boron nitride with jet flow cavitation technology, the method is to utilize a kind of device of preparing two-dimensional nano boron nitride with jet flow cavitation technology to prepare, and this device is comprised of storage tank (1), inhalent siphon (2), valve (3), motor (4), ram pump (5), tensimeter (6), high pressure pipe (7), cavitation producer (8), water-circulating cooling device (9) and return line (10); It is characterized in that: the method concrete steps are as follows:
Step 1: be that 0.01% ~ 5% dispersion agent or surface-modifying agent, weight ratio are that 85% ~ 99% water mixes with weight ratio is 0.1% ~ 10%, mean particle size is 10 μ m ~ 50 μ m boron nitride powder, weight ratio, prepare the good boron nitride aqueous solution of dispersion stabilization, put into storage tank (1);
Step 2: the operating pressure of setting ram pump (5) is 3MPa ~ 80MPa, open inhalent siphon (2) and locate valve (3), the boron nitride aqueous solution enters ram pump (5) by storage tank (1), open the operation of motor (4) system, the boron nitride aqueous solution is pressurized to specified pressure, and its pressure range is 3MPa ~ 80MPa;
Step 3: the boron nitride aqueous solution after the pressurization enters in the cavitation producer (8) by high pressure pipe (7), boron nitride particle in the solution the peeling off of generating plate layer under the effect of cavitation force, obtain containing the solution of individual layer and multilayer two-dimension nm-class boron nitride, the described solution that contains individual layer and multilayer two-dimension nm-class boron nitride is the mixed aqueous solution of individual layer two-dimensional nano boron nitride, multilayer two-dimension nm-class boron nitride, boron nitride particle;
Step 4: the solution that contains individual layer and multilayer two-dimension nm-class boron nitride that obtains through step 3 enters return line (10) by the water outlet of cavitation producer (8), this moment, fluid temperature was higher, under the effect of water-circulating cooling device (9), the temperature that contains the solution of individual layer and multilayer two-dimension nm-class boron nitride returns to room temperature;
Step 5: the solution that contains individual layer and multilayer two-dimension nm-class boron nitride that obtains through step 4 is through the water outlet of return line (10), enter storage tank (1), again enter ram pump (5) and cavitation producer (8) by inhalent siphon (2), repeating step three and step 4 form the circulation of preparation process;
Step 6: system operation 5min ~ 100min post-treatment is finished, and disable motor (4), valve-off (3), the solution in storage tank this moment (1) are the solution of crossing through cavitation process repeatedly;
Step 7: take out the solution that obtains through step 6 from storage tank (1), pour setting tank into, after precipitation, take out supernatant liquor with the method for siphon or overflow, its supernatant liquor is the two-dimensional nano boron nitride solution that contains a large amount of individual layers, bilayer, multilayer mixing.
2. the method for a kind of preparing two-dimensional nano boron nitride with jet flow cavitation technology according to claim 1, it is characterized in that: the dispersion agent in the described step 1 is Xylo-Mucine.
3. the method for a kind of preparing two-dimensional nano boron nitride with jet flow cavitation technology according to claim 1, it is characterized in that: the dispersion agent in the described step 1 is sodium lauryl sulphate.
4. the method for a kind of preparing two-dimensional nano boron nitride with jet flow cavitation technology according to claim 1, it is characterized in that: the surface-modifying agent in the described step 1 is Xylo-Mucine.
5. the method for a kind of preparing two-dimensional nano boron nitride with jet flow cavitation technology according to claim 1, it is characterized in that: the surface-modifying agent in the described step 1 is sodium lauryl sulphate.
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| CN105253862B (en) * | 2014-07-15 | 2019-03-12 | 中国科学院过程工程研究所 | A kind of method of high-temperature liquid-phase removing large scale preparation class graphene boron nitride nanosheet |
| CN104803362B (en) * | 2015-04-10 | 2017-11-10 | 复旦大学 | The preparation method of hexagonal boron nitride powder and three-dimensional boron nitride |
| ITUB20155920A1 (en) * | 2015-11-26 | 2017-05-26 | Fondazione St Italiano Tecnologia | Exfoliation of layered materials using wet-jet milling techniques. |
| CN107697904B (en) * | 2017-09-12 | 2020-07-10 | 刘云芳 | Dispersing method of carbon nano tube |
| CN110152587A (en) * | 2018-02-13 | 2019-08-23 | 华瑞墨石丹阳有限公司 | High-speed jet percussion device and the method for preparing two-dimension nano materials using the device |
| CN110041566A (en) * | 2019-04-30 | 2019-07-23 | 重庆大学 | Sodium carboxymethylcellulose/modification boron nitride nanosheet mixed dispersion liquid and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0432007A1 (en) * | 1989-12-08 | 1991-06-12 | Rhone-Poulenc Chimie | Monodisperse hexagonal boron nitride having high purity with respect to metals and oxygen and its preparation process |
| CN1364728A (en) * | 2002-02-07 | 2002-08-21 | 山东大学 | Process for preparing nitride ultromicro powder and nitride crystal wunder hydrothermal condition |
| CN1587030A (en) * | 2004-07-08 | 2005-03-02 | 北京理工大学 | Process for preparing boron nitride nano tube |
| CN101830458A (en) * | 2010-05-06 | 2010-09-15 | 西安交通大学 | Preparation method of high purity and high concentration graphene suspension |
| CN101915475A (en) * | 2010-08-23 | 2010-12-15 | 孙以川 | Liquid heat energy circulating system and application thereof |
-
2011
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0432007A1 (en) * | 1989-12-08 | 1991-06-12 | Rhone-Poulenc Chimie | Monodisperse hexagonal boron nitride having high purity with respect to metals and oxygen and its preparation process |
| CN1364728A (en) * | 2002-02-07 | 2002-08-21 | 山东大学 | Process for preparing nitride ultromicro powder and nitride crystal wunder hydrothermal condition |
| CN1587030A (en) * | 2004-07-08 | 2005-03-02 | 北京理工大学 | Process for preparing boron nitride nano tube |
| CN101830458A (en) * | 2010-05-06 | 2010-09-15 | 西安交通大学 | Preparation method of high purity and high concentration graphene suspension |
| CN101915475A (en) * | 2010-08-23 | 2010-12-15 | 孙以川 | Liquid heat energy circulating system and application thereof |
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