A filtration device for quantum dot solutions
By designing an automated quantum dot solution filtration device, utilizing a vacuum pump and a polypropylene filter membrane, the problems of slow filtration speed and high filter membrane wear in existing technologies have been solved, achieving rapid and efficient quantum dot solution filtration and low-cost filter membrane use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI XINGSHUO NANO TECH CO LTD
- Filing Date
- 2025-06-05
- Publication Date
- 2026-07-03
AI Technical Summary
In existing technologies, the quantum dot solution filtration process is labor-intensive, slow, and results in significant filter membrane loss.
A filtration device is adopted, which includes a filter membrane component, a quantum dot collection bottle, an inert gas device, a solvent collection bottle, and a molecular sieve circulating filter. The quantum dot solution is automatically filtered by the negative pressure generated by the vacuum pump. The polypropylene filter membrane reduces clogging, the filter membrane is backwashed by inert gas, and the molecular sieve circulating filter adsorbs volatile solvents.
It achieves automatic and rapid filtration of quantum dot solutions with low filter membrane wear, a filtration speed several times faster than traditional methods, less filter membrane clogging, and low cost.
Smart Images
Figure CN224442658U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of filtration devices, specifically, it relates to a filtration device for quantum dot solutions. Background Technology
[0002] Quantum dots, also known as semiconductor nanocrystals, have a size ranging from 1 to 10 nm. Common types include IIB-VIA, IIIA-VA, IVA-VIA, IVA, IB-IIIA-VIA, VIII-VIA, perovskite, and carbon dots. Due to quantum size and dielectric confinement effects, quantum dots possess unique photoluminescence (PL) and electroluminescence (EL) properties. Compared to traditional organic fluorescent dyes, quantum dots exhibit superior optical properties such as high quantum yield, high photochemical stability, resistance to photolysis, broad excitation and narrow emission range, high color purity, and the ability to adjust the emission color by controlling the quantum dot size. Therefore, they are widely used in display technology, oil / water / gas well tracking, biomarking, and disease diagnosis.
[0003] Synthesized quantum dots are typically produced in solvents such as heptane, toluene, or n-hexane, which often contain impurities such as unreacted precursors, oily ligands, and fatty acids, necessitating filtration. Current technology filters this quantum dot solution using organic nylon needle filters, such as the quantum dot-based filter disclosed in US20180037472A1. The filtration process involves manually removing the piston, placing a filter device 100 (which can be removed and replaced) at the bottom of the syringe, pouring in the quantum dot solution, attaching the piston, and pushing the piston rod downwards to force the quantum dot solution through the filter disc 130 (i.e., the filter membrane) of the filter device 100. This operation is labor-intensive, very slow, and results in significant wear and tear on the filter membrane components (i.e., the filter device 100).
[0004] In view of this, this application provides a filtration device for quantum dot solutions, which automatically filters quantum dot solutions quickly and with low filter membrane wear. Utility Model Content
[0005] The purpose of this application is to provide a filtration device for quantum dot solutions that automatically filters quantum dot solutions quickly and with minimal filter membrane wear.
[0006] This application provides a filtration device for a quantum dot solution. The filtration device includes: a filter membrane component 1, a quantum dot collection bottle 2, an inert gas device 3, a solvent collection bottle 4, a molecular sieve circulating filter 5, and a vacuum pump 6. The raw quantum dot solution is connected to one end of the filter membrane component 1 through a pipe. The other end of the filter membrane component 1 is connected to the quantum dot collection bottle 2 and the inert gas device 3 through pipes. The other end of the quantum dot collection bottle 2 is connected to the solvent collection bottle 4 through a pipe. The quantum dot collection bottle 2 is used to collect the filtered quantum dot solution. The solvent collection bottle 4 is used to collect the solvent. The other end of the solvent collection bottle 4 is connected to the molecular sieve circulating filter 5 through a pipe. The molecular sieve circulating filter 5 is connected to the vacuum pump 6 through a pipe.
[0007] In some embodiments, one or more valves 7 are provided on the pipeline.
[0008] In some embodiments, the filter membrane component 1 includes: an inlet 11, an upper housing 12 connected to the inlet 11, an outlet 13, a lower housing 14 connected to the outlet 13, a filter membrane groove disposed on the sealing surface of the lower housing 14, a porous support mesh disposed at the bottom of the filter membrane groove, a filter membrane disposed on the porous support mesh, and screws for connecting and fixing the upper housing 12 and the lower housing 14. The original quantum dot solution is connected to the inlet 11 through a pipe, and the outlet 13 is connected to the quantum dot collection bottle 2 and the inert gas device 3 through pipes respectively.
[0009] Furthermore, a first valve 71 is provided on the pipe connecting the liquid outlet 13 to the quantum dot collection bottle 2. The first valve 71 is used to control whether the negative pressure generated by the vacuum pump 6 reaches the filter membrane component 1. A second valve 72 is provided on the pipe connecting the liquid outlet 13 to the inert gas device 3. The second valve 72 is used to control whether the inert gas enters the filter membrane component 1 through the liquid outlet 13.
[0010] Furthermore, the upper housing 12 has a cavity relative to the filter membrane tank, which is used to accommodate the original quantum dot solution and the filtered impurities.
[0011] Furthermore, the lower housing 14 also has a sealing ring disposed inside the filter membrane groove and placed on the filter membrane, and the upper housing 12 has a circular protrusion at the position of the sealing ring, and the sealing ring and the protrusion serve to seal.
[0012] Furthermore, the filter membrane is a polypropylene filter membrane, and one or more filter membranes are provided.
[0013] In some embodiments, the quantum dot collection bottle 2 includes: a first bottle body 21, a first bottle cap 22, and a first three-way component 23 disposed on the first bottle cap 22. The three-way component has a horizontally disposed first inlet 231, a first guide tube 232 connected to the first inlet 231 and disposed vertically, and a horizontally disposed first vent 233.
[0014] Furthermore, the outlet 13 of the filter membrane component 1 is connected to the first inlet 231 of the quantum dot collection bottle 2 via a pipe, the first guide tube 232 is used to introduce the filtered quantum dot solution into the first bottle body 21, and the first vent 233 of the quantum dot collection bottle 2 is connected to the solvent collection bottle 4 via a pipe.
[0015] In some embodiments, the solvent collection bottle 4 includes: a second bottle body 41, a second bottle cap 42, and a second three-way component 43 disposed on the second bottle cap 42. The three-way component has a horizontally disposed second inlet 431, a second guide tube 432 connected to the second inlet 431 and disposed vertically, and a horizontally disposed second vent 433.
[0016] Furthermore, the first vent 233 of the quantum dot collection bottle 2 is connected to the second inlet 431 of the solvent collection bottle 4 via a pipe, the second guide tube 432 is used to introduce the volatile solvent into the second bottle body 41, and the second vent 433 of the solvent collection bottle 4 is connected to the molecular sieve circulation filter 5 via a pipe.
[0017] Furthermore, a third valve 73 is provided on the pipe connecting the second vent 433 of the solvent collection bottle 4 to the molecular sieve circulation filter 5. The third valve 73 is used to control whether the negative pressure generated by the vacuum pump 6 reaches the solvent collection bottle 4.
[0018] In some embodiments, the molecular sieve circulating filter 5 includes: an inner liner 51, an outer shell layer 52 sleeved outside the inner liner 51, an interlayer 53 formed between the inner liner 51 and the outer shell layer 52, and an air inlet 54, an air outlet 55, and a feed inlet 56 disposed on the top of the inner liner 51. The inner liner 51 is used to fill the molecular sieve adsorbent, and the interlayer 53 is used to store the liquid medium.
[0019] Furthermore, the second vent 433 of the solvent collection bottle 4 is connected to the air inlet 54 via a pipe, the air outlet 55 is connected to the vacuum pump 6 via a pipe, and the feed inlet 56 is used to add molecular sieve adsorbent into the inner liner 51.
[0020] Furthermore, the outer shell layer 52 is also provided with two external interfaces 57, which are connected to an external liquid circulation device through pipes to form a liquid circulation. Attached Figure Description
[0021] Combined with the following appendix Figure 1 The above and other features of this application will be more fully described when the drawings are read. It is understood that these drawings only depict a few embodiments of the application and should not be considered as limiting the scope of the application. The application will be explained more clearly and in more detail through the use of the drawings.
[0022] Figure 1 This is a schematic diagram of the filtration device for the quantum dot solution of this application.
[0023] Figure 2 This is a schematic diagram of the filter membrane component of the quantum dot solution filtration device of this application.
[0024] Figure 3 This is a schematic diagram of the quantum dot collection bottle of the quantum dot solution filtration device of this application.
[0025] Figure 4 This is a schematic diagram of the solvent collection bottle of the filtration device for the quantum dot solution of this application.
[0026] Figure 5 This is a schematic diagram of the molecular sieve circulating filter structure of the quantum dot solution filtration device of this application.
[0027] Explanation of key component symbols:
[0028] Filter membrane component 1, liquid inlet 11, upper shell 12, liquid outlet 13, lower shell 14, quantum dot collection bottle 2, first bottle body 21, first bottle cap 22, first three-way component 23, first inlet 231, first guide tube 232, first vent 233, inert gas device 3, solvent collection bottle 4, second bottle body 41, second bottle cap 42, second three-way component 43, second inlet 431, second guide tube 432, second vent 433, molecular sieve circulating filter 5, inner liner 51, outer shell layer 52, interlayer 53, air inlet 54, air outlet 55, feed inlet 56, external interface 57, vacuum pump 6, valve 7, first valve 71, second valve 72, third valve 73. Detailed Implementation
[0029] The following embodiments are described to aid in understanding this application. These embodiments are not, and should not be, construed in any way as limiting the scope of protection of this application.
[0030] Unless otherwise defined, all terms (including technical and scientific terms) in this specification may be defined as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having meanings consistent with their meanings in the context of this disclosure and the relevant field, and will be interpreted in a non-idealized or overly formal sense unless clearly defined herein.
[0031] As used herein, the term "at least one," when modifying the entire list of elements without modifying any individual elements of the list before or after it, shall not be construed as limiting "one." "Or" means "and / or." The terms "comprising" and "including," when used in this specification, indicate the presence of the stated features, regions, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, regions, integrals, steps, operations, elements, components, and / or collections thereof. Therefore, the above wording shall be understood to mean including the stated elements, but not excluding any other elements. The term "and / or" includes any and all combinations of one or more of the associated listed items. The term "a plurality" refers to two or more. The term "connected" refers to a direct or indirect connection. It will be understood that when an element, such as a layer, film, region, or substrate, is referred to as being "on" another element, it may be directly on said other element or intermediate elements may also be present. Conversely, when an element is referred to as being "directly on" another element, no intermediate elements are present. To clearly illustrate the embodiments shown in the figures, some parts that are not actually relevant to the description may be omitted. The terms "first," "second," "third," etc., may be used herein to describe and distinguish different elements, components, regions, layers, and / or portions, but these elements, components, regions, layers, and / or portions should not be limited by these terms.
[0032] like Figure 1 As shown, a filtration device for a quantum dot solution includes: a filter membrane component 1, a quantum dot collection bottle 2, an inert gas device 3, a solvent collection bottle 4, a molecular sieve circulating filter 5, and a vacuum pump 6. The raw quantum dot solution is connected to the inlet 11 of the filter membrane component 1 through a pipe. The outlet 13 of the filter membrane component 1 is connected to the first inlet 231 of the quantum dot collection bottle 2 and the inert gas device 3 through pipes. A first valve 71 and a second valve 72 are respectively installed on these two pipes. The quantum dot collection bottle 2 is used to collect the filtered quantum dot solution. The first vent 233 of the quantum dot collection bottle 2 is connected to the second inlet 431 of the solvent collection bottle 4 through a pipe. The solvent collection bottle 4 is used to collect solvent. The second vent 433 of the solvent collection bottle 4 is connected to the inlet 54 of the molecular sieve circulating filter 5 through a pipe. A third valve 73 is installed on this pipe. The outlet 55 of the molecular sieve circulating filter 5 is connected to the vacuum pump 6 through a pipe.
[0033] The vacuum pump 6 is turned on, the first valve 71 and the third valve 73 are opened, and the second valve 72 is closed. The negative pressure generated by the vacuum pump 6 draws the raw quantum dot solution into the filter membrane component 1. Impurities are filtered out by the two polypropylene filter membranes in the filter membrane component 1 and are trapped on the polypropylene filter membranes. The filtered quantum dot solution enters the quantum dot collection bottle 2. Due to the suction generated by the vacuum pump, the raw quantum dot solution is filtered very quickly and automatically through the filter membrane component 1. Traditional organic nylon needle filters require manual operation, and because the filter membrane is prone to clogging, the needle advances very slowly, resulting in a long filtration time. For the same volume of raw quantum dot solution, a traditional organic nylon needle filter takes 8 hours, while the filtration device of this application only takes half an hour. At the same time, because the filter membrane of a traditional organic nylon needle filter is prone to clogging, it needs to be replaced frequently, resulting in high filter membrane wear and high cost. The filtration device of this application uses a polypropylene filter membrane and has the adsorption force generated by a vacuum pump, which is not easy to clog. If clogging occurs after long-term use, the first valve 71 and the third valve 73 are closed, the second valve 72 is opened, and the inert gas device 3 introduces inert gas (such as nitrogen) into the liquid outlet 13 of the filter membrane component 1. The inert gas blows the polypropylene filter membrane in the reverse direction, blowing away the impurities that cause clogging and reducing the number of filter membrane replacements.
[0034] like Figure 2 As shown, the filter membrane component 1 includes: an inlet 11, an upper housing 12 connected to the inlet 11, an outlet 13, a lower housing 14 connected to the outlet 13, a filter membrane groove disposed on the sealing surface of the lower housing 14, a porous support mesh disposed at the bottom of the filter membrane groove, a filter membrane disposed on the porous support mesh, and screws for connecting and fixing the upper housing 12 and the lower housing 14. The original quantum dot solution is connected to the inlet 11 through a pipe, and the outlet 13 is connected to the quantum dot collection bottle 2 and the inert gas device 3 through pipes. A first valve 71 is provided on the pipe connecting the outlet 13 and the quantum dot collection bottle 2. The first valve 71 is used to control whether the negative pressure generated by the vacuum pump 6 reaches the filter membrane component 1. A second valve 72 is provided on the pipe connecting the outlet 13 and the inert gas device 3. The second valve 72 is used to control whether the inert gas enters the filter membrane component 1 through the outlet 13. The upper housing 12 has a cavity relative to the filter membrane groove, which is used to accommodate the original quantum dot solution and the filtered impurities. The lower housing 14 also has a sealing ring disposed inside the filter membrane groove and placed on the filter membrane. The upper housing 12 has a circular protrusion relative to the sealing ring. The sealing ring and the protrusion serve a sealing function. The filter membrane is a polypropylene filter membrane, and one or more filter membranes are provided.
[0035] like Figure 3As shown, the quantum dot collection bottle 2 includes: a first bottle body 21, a first bottle cap 22, and a first three-way component 23 disposed on the first bottle cap 22. The three-way component has a horizontally disposed first inlet 231, a first guide tube 232 connected to the first inlet 231 and disposed vertically, and a horizontally disposed first vent 233. The outlet 13 of the filter membrane component 1 is connected to the first inlet 231 of the quantum dot collection bottle 2 through a pipe. The first guide tube 232 is used to introduce the filtered quantum dot solution into the first bottle body 21. The first vent 233 of the quantum dot collection bottle 2 is connected to the solvent collection bottle 4 through a pipe. In this application's filtration device, the quantum dot collection bottle is not directly connected to the vacuum pump. Since the solvent in the quantum dot solution is usually a volatile solvent such as heptane, toluene, or n-hexane, it is easy to evaporate when the vacuum pump is turned on for negative pressure suction. If directly connected to the vacuum pump, it would enter the vacuum pump and damage it. Therefore, by connecting the quantum dot collection bottle 2 to the solvent collection bottle, most of the evaporated solvent is collected in the solvent collection bottle. However, a small amount of solvent will still be drawn into the vacuum pump. The design connects the outlet of the solvent collection bottle to the molecular sieve circulation filter, which can completely adsorb the volatile solvent.
[0036] like Figure 4 As shown, the solvent collection bottle 4 includes: a second bottle body 41, a second bottle cap 42, and a second three-way component 43 disposed on the second bottle cap 42. The three-way component has a horizontally disposed second inlet 431, a second guide tube 432 connected to the second inlet 431 and disposed vertically, and a horizontally disposed second vent 433. The first vent 233 of the quantum dot collection bottle 2 is connected to the second inlet 431 of the solvent collection bottle 4 via a pipe. The second guide tube 432 is used to guide the evaporating solvent into the second bottle body 41. The second vent 433 of the solvent collection bottle 4 is connected to the molecular sieve circulating filter 5 via a pipe. A third valve 73 is disposed on the pipe connecting the second vent 433 of the solvent collection bottle 4 to the molecular sieve circulating filter 5. The third valve 73 is used to control whether the negative pressure generated by the vacuum pump 6 reaches the solvent collection bottle 4. The suction force at the filter membrane component can also be controlled by controlling how much the third valve is opened. Furthermore, when filtration is not required for a short period of time, it is not necessary to turn off the vacuum pump; the third valve control is sufficient.
[0037] like Figure 5As shown, the molecular sieve circulating filter 5 includes: an inner liner 51, an outer shell 52 fitted over the inner liner 51, a sandwich 53 formed between the inner liner 51 and the outer shell 52, and an air inlet 54, an air outlet 55, and a feed inlet 56 disposed on the top of the inner liner 51. The inner liner 51 is used to fill the molecular sieve adsorbent, and the sandwich 53 is used to store the liquid medium. The second vent 433 of the solvent collection bottle 4 is connected to the air inlet 54 via a pipe, the air outlet 55 is connected to the vacuum pump 6 via a pipe, and the feed inlet 56 is used to add the molecular sieve adsorbent into the inner liner 51. The outer shell 52 is also provided with two external interfaces 57, which are connected to an external liquid circulation device via pipes to form a liquid circulation. Low-temperature liquid circulation (such as cold water) cools the molecular sieve, enhancing its adsorption capacity. The gas to be treated enters through the air inlet and passes through the molecular sieve, where impurities are adsorbed. After a period of use, high-temperature liquid circulation (such as hot water) heats the molecular sieve, desorbs impurities, and regenerates the molecular sieve.
[0038] Although this application discloses several aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art. Various modifications and improvements can be made without departing from the concept of this application, and these all fall within the scope of protection of this application. The various aspects and embodiments disclosed in this application are for illustrative purposes only and are not intended to limit this application. The actual scope of protection of this application is determined by the claims.
Claims
1. A filtering device for quantum dot solutions, characterized by, The filtration device includes: a filter membrane component (1), a quantum dot collection bottle (2), an inert gas device (3), a solvent collection bottle (4), a molecular sieve circulating filter (5), and a vacuum pump (6). The original quantum dot solution is connected to one end of the filter membrane component (1) through a pipe. The filter membrane of the filter membrane component (1) is used to trap impurity particles in the quantum dot solution and allow quantum dot particles to pass through the filter membrane. The other end of the filter membrane component (1) is connected to the quantum dot collection bottle (2) and the inert gas device (3) through pipes respectively. The other end of the quantum dot collection bottle (2) is connected to the solvent collection bottle (4) through a pipe. The quantum dot collection bottle (2) is used to collect the filtered quantum dot solution. The solvent collection bottle (4) is used to collect the solvent. The other end of the solvent collection bottle (4) is connected to the molecular sieve circulating filter (5) through a pipe. The molecular sieve circulating filter (5) is connected to the vacuum pump (6) through a pipe.
2. The filtering device of quantum dot solution according to claim 1, wherein, One or more valves (7) are installed on the pipeline.
3. The filtering device of quantum dot solution according to claim 1, wherein, The filter membrane component (1) includes: an inlet (11), an upper housing (12) connected to the inlet (11), an outlet (13), a lower housing (14) connected to the outlet (13), a filter membrane groove disposed on the sealing surface of the lower housing (14), a porous support mesh disposed at the bottom of the filter membrane groove, a filter membrane disposed on the porous support mesh, and screws for connecting and fixing the upper housing (12) and the lower housing (14). The original quantum dot solution is connected to the inlet (11) through a pipe, and the outlet (13) is connected to the quantum dot collection bottle (2) and the inert gas device (3) through pipes respectively.
4. The filtration device for quantum dot solution as described in claim 3, characterized in that, Includes one or more features selected from the following group: (A) A first valve (71) is provided on the pipe connecting the liquid outlet (13) and the quantum dot collection bottle (2). The first valve (71) is used to control whether the negative pressure generated by the vacuum pump (6) reaches the filter membrane component (1); A second valve (72) is provided on the pipe connecting the liquid outlet (13) and the inert gas device (3). The second valve (72) is used to control whether the inert gas enters the filter membrane component (1) through the liquid outlet (13). (B) The upper housing (12) has a cavity relative to the position of the filter membrane tank, the cavity being used to accommodate the original quantum dot solution and the filtered impurities; (C) The lower housing (14) also has a sealing ring disposed inside the filter membrane groove and placed on the filter membrane, and the upper housing (12) has a circular protrusion relative to the position of the sealing ring, and the sealing ring and the protrusion serve to seal. (D) The filter membrane is a polypropylene filter membrane, and one or more filter membranes are provided.
5. The filtering device of quantum dot solution according to claim 1, wherein, The quantum dot collection bottle (2) includes: a first bottle body (21), a first bottle cap (22), and a first three-way component (23) disposed on the first bottle cap (22). The three-way component has a horizontally disposed first inlet (231), a first guide tube (232) connected to the first inlet (231) and disposed vertically, and a horizontally disposed first vent (233).
6. The filtering device of quantum dot solution according to claim 5, wherein, The outlet (13) of the filter membrane component (1) is connected to the first inlet (231) of the quantum dot collection bottle (2) through a pipe. The first guide tube (232) is used to introduce the filtered quantum dot solution into the first bottle body (21). The first vent (233) of the quantum dot collection bottle (2) is connected to the solvent collection bottle (4) through a pipe.
7. The filtering device of quantum dot solution according to claim 1, wherein, The solvent collection bottle (4) includes: a second bottle body (41), a second bottle cap (42), and a second three-way component (43) disposed on the second bottle cap (42). The three-way component has a horizontally disposed second inlet (431), a second guide tube (432) connected to the second inlet (431) and disposed vertically, and a horizontally disposed second vent (433).
8. The filtering device for quantum dot solution according to claim 7, wherein The first vent (233) of the quantum dot collecting bottle (2) is connected to the second inlet (431) of the solvent collecting bottle (4) through a pipe. The second guide tube (432) is used to introduce the evaporated solvent into the second bottle body (41). The second vent (433) of the solvent collecting bottle (4) is connected to the molecular sieve circulating filter (5) through a pipe. A third valve (73) is provided on the pipe connecting the second vent (433) of the solvent collecting bottle (4) and the molecular sieve circulating filter (5). The third valve (73) is used to control whether the negative pressure generated by the vacuum pump (6) reaches the solvent collecting bottle (4).
9. The filtering device of quantum dot solution as claimed in claim 1, wherein, The molecular sieve circulating filter (5) includes: an inner liner (51), an outer shell layer (52) fitted outside the inner liner (51), an interlayer (53) formed between the inner liner (51) and the outer shell layer (52), and an air inlet (54), an air outlet (55), and a feed inlet (56) disposed on the top of the inner liner (51). The inner liner (51) is used to fill the molecular sieve adsorbent, and the interlayer (53) is used to store the liquid medium.
10. The filtering device for quantum dot solution according to claim 9, wherein, The second vent (433) of the solvent collection bottle (4) is connected to the air inlet (54) through a pipe, the air outlet (55) is connected to the vacuum pump (6) through a pipe, and the feed inlet (56) is used to add molecular sieve adsorbent into the inner liner (51); the outer shell layer (52) is also provided with two external interfaces (57), and the two external interfaces (57) are connected to an external liquid circulation device through a pipe to form a liquid circulation.