CN114517890B - Adaptive valve system based on specific gas response and manufacturing method thereof - Google Patents
Adaptive valve system based on specific gas response and manufacturing method thereof Download PDFInfo
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Abstract
The invention discloses a self-adaptive valve system based on specific gas response and a manufacturing method thereof. When at least one gas contacts the functional liquid, the reaction with the responsive compound changes the surface activity of the functional liquid, thereby increasing or decreasing the critical film pressure of the at least one gas, resulting in a switch state of the valve system. The invention aims at the problems that the common air valve has large volume and heavy mass, the air valve component is limited by precision and size, the manufacturing cost is high, the external field input is required, the specific gas is not identified and the application environment is limited, and the identification of the gas in the limited space is realized by utilizing the gas response technology. The system has the characteristics of good air tightness, high reliability, strong stability, specific identification, visualization and the like.
Description
Technical Field
The invention relates to the field of gas response valves, in particular to an adaptive valve system based on specific gas response and a manufacturing method thereof.
Background
Gas is a common form of phase that profoundly affects our lives. Carbon dioxide is an important component of the global carbon cycle, and in recent years, the global industry has rapidly progressed and carbon emissions are large. The consumption of energy causes an increase in carbon dioxide, which also causes a "greenhouse effect". Therefore, it is urgent to study a valve capable of both absorbing carbon dioxide and reducing carbon dioxide emissions. Similarly, sulfur dioxide is one of the main atmospheric pollutants, and thus there is a need to develop a valve that can both absorb sulfur dioxide and reduce sulfur dioxide emissions. While oxygen is one of the important components of the atmosphere, a valve capable of adjusting the flow rate of oxygen according to the oxygen concentration in the environment has been developed, and the valve can be applied to the pharmaceutical industry.
The valve is one of key components for controlling gas inlet and outlet, and is widely applied to industries such as petroleum, chemical industry, electric power, food, metallurgy, medicine and the like. The main diaphragm type and piston type gas valve in the current market has high cost, poor stability and limited application environment because parts are limited by precision and size. Conventional gas valves are mainly controlled by gas pressure differences and spring forces, while an intelligent gas valve based on optical and magnetic responses has attracted attention. The current intelligent air valve is mainly based on the control of external field factors such as light, temperature, magnetic field or electric field, and the valves of the physical mechanisms have no adaptability and specificity to gas and are limited to a certain extent in application. Thus, research into the fabrication and application of adaptive valves based on chemical specific response mechanisms is urgent.
Disclosure of Invention
The invention aims to overcome the defects that the traditional gas valve has large parts, poor stability and poor specificity, requires external field input and cannot meet the use requirements of dangerous occasions such as toxicity, inflammability, explosiveness and the like, and provides an adaptive valve system based on specific gas response and a manufacturing method thereof.
In order to achieve the above object, the technical scheme of the present invention is as follows:
the self-adaptive valve system based on specific gas response comprises a gas container, a gas path switching valve, a sealing device and a detection device which are sequentially connected, wherein gas is filled in the gas container, a pore canal material is placed in the sealing device, the pore canal material is soaked by functional liquid to form a valve system, the functional liquid contains a compound with responsiveness to at least one gas in the gas, the gas is introduced into the sealing device through the gas path switching valve, the type and the concentration of the gas introduced into the sealing device are controlled to control the switching state of the valve system, and the detection device is used for detecting the switching state of the valve system.
Preferably, the gas includes a first gas and a second gas, and the functional liquid includes a compound having responsiveness to the first gas.
Preferably, when the first gas is carbon dioxide, the second gas is at least one of nitrogen, oxygen, argon, and air; when the first gas is sulfur dioxide or oxygen, the second gas is at least one of nitrogen, carbon dioxide, argon and air; when the first gas is at least two of carbon dioxide, sulfur dioxide and oxygen, the second gas is at least one of nitrogen, argon and air.
Preferably, a concentration of the first gas is introduced into the sealing device and then reacts with the responsive compound to change the surface tension of the functional liquid and control the opening and closing state of the valve system.
Preferably, the compound having responsiveness is a substance having a surface activity, and the valve system is in a closed state when the concentration of the substance having a surface activity in the functional liquid is 0.05 to 1mmol/L.
Preferably, when the substance with surface activity in the functional liquid is polymer AO-D-OA and the concentration is 1mmol/L, the first gas is carbon dioxide, and if the concentration of the carbon dioxide is less than 2%, the valve system is in an open state; if the concentration of the carbon dioxide is between 2 and 8 percent, controlling the valve system to be in an open state or a closed state by adjusting the pressure of the first gas; if the carbon dioxide concentration is greater than 8%, the valve system is in a closed state.
Preferably, when the valve system is in the closed state, the sealing device is heated and the second gas is introduced, so that the valve system is in the open state.
Preferably, the pore canal material is determined according to the nature of the compound in the functional liquid, and comprises hydrophilic or hydrophobic pore canal material with the thickness of 0.05-0.5 mm and the pore diameter of 0.45-10 mu m.
A method of manufacturing an adaptive valve system based on specific gas response according to the above, comprising the steps of:
1) Storing gas in a gas container, and changing the type and concentration of the gas introduced into the sealing device through a gas path switching valve connected with the gas container;
2) Preparing functional liquid by adopting a compound with responsiveness to at least one gas in the gases, placing a pore channel material into the functional liquid to infiltrate to form a valve system, and placing the pore channel material with the valve system into a closed device;
3) Controlling the opening and closing states of the valve system by controlling the type and concentration of the gas introduced into the sealing device;
4) And judging the on-off state of the valve system through a detection device.
Preferably, the gas includes a first gas and a second gas, the functional liquid contains a compound having a response to the first gas, when the first gas is carbon dioxide, the second gas is at least one of nitrogen, oxygen, argon and air, and when the first gas is introduced to make the valve system in a closed state, the sealing device is heated and the second gas is introduced to make the valve system in an open state; when the first gas is sulfur dioxide or oxygen, the second gas is at least one of nitrogen, carbon dioxide, argon and air; when the first gas is at least two of carbon dioxide, sulfur dioxide and oxygen, the second gas is at least one of nitrogen, argon and air.
Compared with the prior art, the invention has the beneficial effects that:
(1) Aiming at the problems of heavy weight, insufficient compactness and limited application environment of the traditional gas valve part, the invention utilizes a gas response mechanism to realize the self-adaptive, visual, convenient and stable manufacturing of the gas valve system by using a method for testing the pressure of a limited space. The manufacturing method is simple and reliable, low in cost and strong in stability, the influence of possible air leakage of the pure solid parts is avoided, and the manufactured air valve has specific air response and is not limited by the environment.
(2) The mechanism of the adaptive valve system based on specific gas response of the present invention is that the physicochemical properties of the compounds in the functional liquid are changed before and after contacting the first gas. In addition to the gas valve, the valve may also be used as a first gas detector, a first gas separator and a first gas responsive substance transport device. When the first gas is carbon dioxide, the multifunctional carbon dioxide responsive valve is capable of reducing carbon dioxide emissions and increasing carbon dioxide absorption.
(3) When the self-adaptive valve system based on specific gas response contacts carbon dioxide, polymer molecules in the functional liquid are protonated to form a compound without surface activity, so that the surface tension of the solution is increased, and further, larger gas transmembrane pressure is needed to open the valve system. The gas response valve system based on the finite field space pressure test technology has very high self-adaptability and specificity, can respond to different gas systems according to the difference of compounds in functional liquid, and provides a basis for manufacturing specific gas valves such as sulfur dioxide, oxygen and the like.
Drawings
FIG. 1 is a schematic diagram of an apparatus for a specific gas response based adaptive valve system according to an embodiment of the present application; the first schematic diagram of fig. 1 is an experimental process of the adaptive valve system when the second gas is introduced, and the second schematic diagram is an experimental process of the adaptive valve system when the first gas is introduced after the gas path switching valve is rotated;
FIG. 2 is a schematic illustration of the mechanism of an adaptive valve system based on specific gas response in an embodiment of the present application; the first schematic diagram of fig. 2 is a state when the second gas and the first gas are respectively introduced after the hole channel material is blank, infiltrated with the functional liquid and infiltrated with the functional liquid, and the second schematic diagram is a surface molecular arrangement state when the second gas and the first gas are respectively introduced after each hole on the hole channel material is blank, infiltrated with the functional liquid and infiltrated with the functional liquid;
FIG. 3 is a visual result of nitrogen (left) and carbon dioxide (right) through an adaptive valve system based on specific gas response in example 1;
FIG. 4 shows the results of the surface tension test of the functional liquid of the example 1 based on the specific gas response at different concentrations in the case of not introducing gas, introducing carbon dioxide and introducing nitrogen after heating the same;
FIG. 5 shows the results of the test of critical transmembrane pressure of the adaptive valve system based on specific gas response in example 1 using different concentrations of functional liquid without gas, carbon dioxide and nitrogen after heating the mixture;
FIG. 6 is a graph showing the results of testing the critical transmembrane pressure of an adaptive valve system based on specific gas response with different gases introduced in example 2;
FIG. 7 shows the results of the critical transmembrane pressure test of the adaptive valve system based on specific gas response with different concentrations of carbon dioxide introduced in example 3.
Detailed Description
The invention is further explained below with reference to the drawings and specific embodiments. The drawings of the present invention are merely schematic to facilitate understanding of the present invention, and specific proportions thereof may be adjusted according to design requirements. The definition of the context of the relative elements and the front/back of the figures described herein should be understood by those skilled in the art to refer to the relative positions of the elements and thus all the elements may be reversed to represent the same elements, which are all within the scope of the present disclosure.
Embodiments of the present application provide an adaptive valve system based on specific gas response that has the characteristics of high stability and adaptability to various environments. Referring to fig. 1, the gas container comprises a detection device, a gas path switching valve 4 and a sealing device 6 which are sequentially connected. The gas container 1 is filled with gas, and the gas container 1 comprises a plurality of injectors, one gas is stored in each injector, the plurality of injectors are connected with the gas path switching valve 4, and the gas path switching valve 4 can be used for changing the type and the concentration of the gas flowing into the sealing device 6. The sealing device 6 is internally provided with a pore canal material 9, the pore canal material 9 is soaked by functional liquid to form a valve system 7, the functional liquid contains a compound which has responsiveness with at least one gas in the gases, the gases are introduced into the sealing device 6 through the gas path switching valve 4, and the opening and closing states of the valve system are controlled by controlling the types and the concentrations of the gases introduced into the sealing device 6. Specifically, the compound with the responsiveness to at least one gas is a substance with surface activity, the concentration of the substance with surface activity in the functional liquid is 0.05-1 mmol/L, and the gas circuit switching valve 4 is a three-port end valve. Specifically, the substance with surface activity can be a surfactant, the pore canal material is determined according to the nature of the compound in the functional liquid, the hydrophilic or hydrophobic pore canal material is included, the thickness is 0.05-0.5 mm, and the pore canal material pore diameter is 0.45-10 mu m. The valve system is to fill functional liquid in the pore channel medium of the pore channel material 9, and the on-off state of the valve system can be realized due to different microcosmic capillary forces. The pore canal material is used as a solid carrier, the solid carrier is soaked by functional liquid and then is placed in a closed device, and the device can open a gas path after introducing gas with certain pressure. The system is composed of pore canal materials, functional liquid and a sealing device, when gas is introduced, the pressure of the system is increased due to the compression of the gas, and after a gas path is opened, the pressure of the system is reduced, so that the process can be detected. As the physicochemical properties of the functional liquid change after contacting different gases, the system may obtain different critical transmembrane pressures, and the valve system may be in different switching states.
The valve system of the existing physical mechanism is mainly controlled by temperature, illumination, magnetic field and the like. In contrast, the gas response does not generate byproducts and environmental pollution, and is a safer and more effective response stimulus source. Therefore, the self-adaptive valve system based on specific gas response is provided, and the valve system replaces the traditional diaphragm type air valve, so that the self-adaptive valve system has the advantages of self-adaptation, specificity, convenience, environmental protection, adjustable multiphase selectivity, improved antifouling performance, enhanced stability, better air tightness and the like.
In a specific embodiment, the detection means comprises a pressure sensor 5 and a detection vessel 8, the closure means 6 having an inlet end and an outlet end. Initially, the valve system was in a closed state, gas was admitted from the inlet end, and no gas was vented from the outlet end. With the continuous compression of the gas, the valve system is finally converted into an open state, the gas pressure at the inlet end is reduced, and the gas is discharged at the outlet end. Wherein, pressure sensor 5 locates the entrance point of closing device, and detection container 8 locates the exit point of closing device 6. The pressure sensor 5 is used for monitoring the pressure at the inlet end of the sealing device 6, and the detection container 8 is filled with water, so that whether the outlet end is discharged with gas or not can be judged, and whether the air valve leaks gas or not can be observed.
In a specific embodiment, the gas comprises a first gas 3 and a second gas 2, and the functional liquid comprises a compound 11 that is responsive to the first gas 3. When the first gas 3 is carbon dioxide and the second gas 2 is at least one of nitrogen, oxygen, argon and air and reaches a certain pressure, the introduced second gas 2 enables the valve system to be in an open state; after the first gas 3 is introduced so that the valve is closed, nitrogen is introduced under heating, and the valve system is opened again. When the first gas 3 is sulfur dioxide or oxygen, the second gas 2 is at least one of nitrogen, carbon dioxide, argon and air; when the first gas 3 is at least two of carbon dioxide, sulfur dioxide and oxygen, the second gas 2 is at least one of nitrogen, argon and air. When a certain pressure is reached, the second gas 2 is introduced to enable the valve system to be in an open state; when the first gas 3 is introduced, the valve system is in a closed state.
The manufacturing principle of the self-adaptive valve system based on specific gas response is shown in fig. 2, a substance 11 with surface activity with a certain concentration is dissolved in deionized water 10 to form functional liquid, and a blank pore channel material 9 is soaked by the functional liquid to form a valve system, and the valve system is in a closed state. And the second gas 2 is introduced into the infiltrated pore canal material 9, and the functional liquid can be orderly arranged to reduce the surface tension, so that the valve system is in an open state. The gas path switching valve 4 is rotated, the first gas 3 is introduced, and the functional liquid is converted into compounds 12 and 13 without surface activity due to chemical reaction, so that the surface tension of the solution is increased, and the valve system is in a closed state. Specifically, the pore material 9 may be a pore membrane, or other pore materials, so long as capillary force is provided to maintain the wetting function. In other embodiments, if the functional liquid contains compounds 12 and 13 without surface activity before the first gas 3 is introduced, the compounds 12 and 13 without surface activity can be polymerized to form the compound 11 with surface activity after the first gas 3 is introduced, the first gas 3 can reduce the surface tension of the functional liquid, the second gas 2 is introduced, the valve system is in a closed state, the first gas 3 is introduced, and the valve system is in an open state.
In a specific embodiment, when the first gas 3 is carbon dioxide, the functional liquid contains a compound that is responsive to carbon dioxide. The carbon dioxide responsive compounds in the functional liquid include: polyallylamines (PAA), polyethylenimine (PEI), amino-functional siloxane polymers, poly (styrene-diethylaminoethyl methacrylate) latex, alkylamidines with surface activity, N-Methyltetrahydrophyrimidine (MTHP), poly (ethylene oxide) -styrene-N, N-diethylaminoethyl methacrylate block copolymers (OSA), and the like. When the first gas is carbon dioxide, the mechanism of action of the molecules of the substance having a surface activity in the functional liquid is classified into three types: a group having high nucleophilicity or basicity, the basic portion of which may form ammonium bicarbonate, a zwitterionic adduct, or ammonium carbamate upon carbon dioxide introduction; the amidine, amine or carboxyl groups are converted into charged groups by protonation of the neutral groups after adding carbon dioxide; the amine groups react with carbon dioxide to form an ammonium carbamate bridge, thereby cross-linking the molecules. When the compound with responsiveness is a substance with surface activity, carbon dioxide with a certain concentration is introduced into the sealing device 6 and then reacts with the substance with surface activity to change the surface tension of the functional liquid and control the opening and closing state of the valve system. The physicochemical properties of the functional liquid change before and after the first gas is introduced, and in other embodiments, the first gas may be replaced by a liquid to achieve the open/close state of the valve system.
Example 1
In example 1 of the present application, the first gas 3 is carbon dioxide, and the second gas 2 is nitrogen, for example, the structure and principle of the adaptive valve system based on specific gas response will be described in detail. The surface active substance in example 1 of the present application is a compound of polyetheramine and oleic acid (polymer AO-D-OA). The polyether amine and oleic acid compound is dissolved in deionized water to prepare functional liquid with a certain concentration, and the pore canal material 9 can be nylon membrane. The nylon membrane is immersed in the functional liquid for at least five minutes to form the valve system of the embodiment, and the valve system is taken out and then placed in the sealing device 6, and the valve system is completely connected. The initial state of the valve system is a closed state, the injection pump of the gas container 1 is pushed at a certain flow rate (0.5-5 mL/min), and the pressure sensor 5 detects that the pressure at the inlet end of the valve system starts to increase. When the detected pressure reaches the maximum value, the pressure starts to decrease, which indicates that the valve system is in an open state, and the pressure required for opening the valve system has a certain relation with the surface tension of the solution. Nitrogen is introduced into the valve system, and as the functional liquid has surface activity, polymer AO-D-OA molecules can be orderly arranged to reduce surface tension, so that critical transmembrane pressure of the valve system is reduced. And the three-port end valve is rotated, carbon dioxide is introduced, and as the polymer AO-D-OA is protonated into a compound without surface activity, the molecular arrangement in the solution is disordered, the surface tension of the solution is increased, and the critical transmembrane pressure of a valve system is increased. When the concentration of the polymer AO-D-OA in the functional liquid is 1mmol/L, if the first gas is carbon dioxide and the concentration is less than 2%, the valve system is in an open state; if the concentration of the carbon dioxide is between 2 and 8 percent, controlling the valve system to be in an open state or a closed state by adjusting the pressure of the first gas; if the carbon dioxide concentration is more than 8%, the valve system is in a closed state.
Referring to fig. 3, based on the theory of transmembrane pressure test of gas response, when the pressure of nitrogen gas on the valve system is lower than the critical transmembrane pressure, the valve system is in a closed state, the nitrogen gas cannot pass, and no bubbles can be observed in the detection vessel 8. And as nitrogen continuously enters the system, the pressure brought to the valve system is gradually increased, and when the pressure exceeds the critical transmembrane pressure of the valve system, the valve is opened, so that the nitrogen can pass through, the pressure of the system is suddenly reduced, and bubbles can be observed in the detection container 8. Because the critical transmembrane pressure of carbon dioxide in the valve system is larger, the nitrogen inlet valve system is in an open state and the carbon dioxide inlet valve system is in a closed state under a certain application pressure.
After carbon dioxide is introduced to enable the valve system to be in a closed state, the three-port valve is rotated, nitrogen is continuously introduced into the system, and meanwhile, the sealing device 6 is placed in a water bath at 60 ℃. The carbon dioxide is discharged after the system is deprotonated, and the compounds in the functional liquid can be polymerized to form a polymer with surface activity, so that the system is in an open state again. The closed and open states of the system of the embodiment can be continuously changed by introducing different gases, and the system has the advantages of stain resistance, high stability and reusability.
The polymer solution can be selected to have a proper concentration according to the surface tension of the polymer solution at different concentrations shown in FIG. 4, and thus, when the substance having a surface activity is the polymer D-OA or AO-D-OA, the concentration thereof may be 0.05 to 1mmol/L. In one example, when the concentration of the substance having a surface activity is 1mmol/L, the surface tension of the functional liquid is about 30mN/m, and the surface tension of the functional liquid after carbon dioxide is introduced is about 50 mN/m.
Further, polymer solutions with different concentrations are used as functional liquids, and the critical transmembrane pressure measured by introducing carbon dioxide before and after introducing carbon dioxide, heating the carbon dioxide, and then introducing nitrogen is shown in fig. 5. The optimal concentration of the substance with surface activity is 0.05-1 mmol/L through a valve system with the critical transmembrane pressure of the functional liquid introduced with carbon dioxide changed. In one embodiment, the critical transmembrane pressure of the functional liquid valve system is about 84kPa and the critical transmembrane pressure of the functional liquid valve system after carbon dioxide is introduced is about 92kPa when the concentration of the surface active substance is 1mmol/L.
Example 2
In example 2 of the present application, the second gas 2 in example 1 was replaced with air, oxygen or argon from nitrogen, and the rest was unchanged, so as to obtain the specific detection result of the adaptive valve system based on specific gas response as shown in fig. 6. When the concentration is 1mmol/L, the critical transmembrane pressure of air, oxygen, argon or nitrogen is about 84kPa, and the critical transmembrane pressure of the functional liquid after carbon dioxide is introduced is about 92 kPa. Thus in adaptive valve systems based on specific gas responses, the adaptation is manifested in that no external field is required, but rather the system switching state is brought about by controlling the atmosphere itself. The substances with specificity that are present at the surface-active, once determined, will only respond to the corresponding gas.
Example 3
In example 3 of the present application, the concentration of carbon dioxide in the first gas 3 in example 1 was changed, and the rest was unchanged, so as to obtain critical transmembrane pressures at different concentrations of carbon dioxide, and the test results are shown in fig. 7. When the concentration of carbon dioxide in the gas is less than 2%, the critical transmembrane pressure of the gas is about 84kPa, and the critical transmembrane pressure of the functional liquid after the concentration of carbon dioxide in the gas is more than 8% is about 92 kPa. Thus adaptive valving based on specific gas responses is adaptive and specific to different concentrations of carbon dioxide.
Example 4
In example 4 of the present application, the surface active substance in example 1 was replaced from polymer AO-D-OA to an active substance that generates a surface tension response to carbon dioxide, the remainder being unchanged. The substance with surface activity is dissolved in deionized water 10 to prepare functional liquid with a certain concentration, and the pore canal material is selected from hydrophilic or hydrophobic pore canal materials 9 with different membrane diameters according to the properties of the functional liquid. The pore canal material 9 is soaked in the functional liquid for at least five minutes to form the valve system of the embodiment, and the valve system is taken out and then is placed in the sealing device 6, and the valve system is completely connected.
When nitrogen is introduced into the valve system, the surface tension is reduced due to the ordered arrangement of substances with surface activity in the functional liquid, so that the critical transmembrane pressure of the valve system is reduced. And the valve at the three ports is rotated, carbon dioxide is introduced, and as the surface activity of the functional liquid is destroyed, the molecular arrangement is disordered, the surface tension is increased, and the critical transmembrane pressure of the valve system is increased. Therefore, under a certain pressure, the valve system is in an open state when nitrogen is introduced, and is in a closed state when carbon dioxide is introduced.
Example 5
In example 5 of the present application, the first gas 3 in example 1 is replaced with sulfur dioxide, the functional liquid is replaced with a solution responsive to sulfur dioxide, and thus the sulfur dioxide responsive valve can be made based on the mechanism of the adaptive valve for specific gas response, and the second gas 2 can be air, oxygen, argon or nitrogen. According to the surface tension and critical transmembrane pressure of functional liquid with different concentrations, a system with a certain concentration of functional liquid with changed surface tension after sulfur dioxide is introduced can be selected as a proper concentration. The pore canal material 9 is soaked in the functional liquid with a certain concentration for at least five minutes to form the valve system of the embodiment, and the valve system is taken out and then placed in the sealing device 6, and the valve system is completely connected.
And nitrogen is introduced into the valve system, and the surface tension is reduced due to the ordered arrangement of substances with surface activity in the functional liquid, so that the critical transmembrane pressure of the valve system is reduced. And the three-port valve is rotated, sulfur dioxide is introduced, and as the surface activity of the compound is destroyed, the molecular arrangement is disordered, the surface tension is increased, and the critical transmembrane pressure of a valve system is increased. Therefore, under a certain pressure, the valve system is in an open state when nitrogen is introduced, and is in a closed state when sulfur dioxide is introduced.
Example 6
Example 6 of the present application replaces the first gas 3 in example 1 with oxygen and the functional liquid with a solution responsive to oxygen, so that an oxygen responsive valve can be made based on the mechanism of an adaptive valve for specific gas response. The functional liquid in this embodiment may be a polymer-nitroimidazole conjugate synthesized by a surfactant, nitroimidazole derivative 3- (2-nitro-1 h-imidazol-1-yl) propan-1-amine, l-aspartic acid beta-benzyl ester, etc., and the second gas 2 may be air, argon, nitrogen, sulfur dioxide, carbon dioxide, etc. The pore canal material 9 is soaked in functional liquid with a certain concentration for at least five minutes to form the valve system of the embodiment, and the valve system is taken out and then placed in the sealing device 6, and the valve system is completely connected.
And nitrogen is introduced into the valve system, and the surface tension is reduced due to the ordered arrangement of substances with surface activity in the functional liquid, so that the critical transmembrane pressure of the valve system is reduced. And the valve at the three ports is rotated, oxygen is introduced, and as the surface activity of the functional liquid is destroyed, the molecular arrangement is disordered, the surface tension is increased, and the critical transmembrane pressure of a valve system is increased. Therefore, under a certain pressure, the valve system is in an open state when nitrogen is introduced, and is in a closed state when oxygen is introduced.
Example 7
Example 7 of the present application replaces the first gas 3 in example 1 with at least two of carbon dioxide, sulfur dioxide and oxygen, and the functional liquid with a solution of at least two of carbon dioxide, sulfur dioxide and oxygen, so that the at least two of carbon dioxide, sulfur dioxide and oxygen gas responsive valves can be made based on the mechanism of the adaptive valve of specific gas response. The second gas 2 may be air, argon, nitrogen, etc. The pore canal material 9 is soaked in functional liquid with a certain concentration for at least five minutes to form the valve system of the embodiment, and the valve system is taken out and then placed in the sealing device 6, and the valve system is completely connected.
And nitrogen is introduced into the valve system, and the surface tension is reduced due to the ordered arrangement of substances with surface activity in the functional liquid, so that the critical transmembrane pressure of the valve system is reduced. And (3) rotating the valve at the three ports, and introducing at least two gases of carbon dioxide, sulfur dioxide and oxygen, wherein the critical transmembrane pressure of the valve system is increased due to the fact that the surface activity of the functional liquid is destroyed, the molecular arrangement is disordered, and the surface tension is increased. Therefore, under a certain pressure, the valve system is in an open state when nitrogen is introduced, and is in a closed state when at least two gases of carbon dioxide, sulfur dioxide and oxygen are introduced.
Example 8
In example 8 of the present application, the valve system responsive to carbon dioxide in example 1 was used in a carbon dioxide separator and a material transporting device in a mixed gas. The device shown in fig. 1 can be made into a carbon dioxide separator, a substance transportation device and the like with a little improvement. Under a certain pressure, the valve system is in an open state when nitrogen is introduced, and is in a closed state when carbon dioxide is introduced. Depending on the on-off state, the device can be used for carbon dioxide separation and material transport.
The adaptive valve system based on specific gas response is to change the on-off state of the valve system through gas, the gas valve can be applied to various complex gas scenes, and the specific response of the gas valve can be realized by selecting proper functional liquid according to the composition of the gas. Therefore, development of an adaptive valve system based on a specific gas response technique has potential application value.
Similar to the adaptive valve for carbon dioxide specific response described above, an adaptive valve system based on specific gas response can be realized by finding a functional molecule that is responsive to the presence of a specific gas and dissolving the molecule in an appropriate solvent as a functional liquid.
The above embodiments are only used to further illustrate an adaptive valve system based on specific gas response and a method for manufacturing the same, but the invention is not limited to the embodiments, and any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the invention falls within the scope of the technical solution of the invention.
Claims (7)
1. An adaptive valve system based on a specific gas response, characterized by: the gas container is filled with gas, the gas comprises first gas and second gas, a pore canal material is placed in the sealing device, the pore canal material is infiltrated by functional liquid to form a valve system, the functional liquid contains a compound with responsiveness to the first gas, the compound with responsiveness is a substance with surface activity, the concentration of the compound is 0.05-1 mmol/L, the gas is introduced into the sealing device through the gas path conversion valve, the type and concentration of the gas introduced into the sealing device are controlled to control the opening and closing state of the valve system, a certain concentration of the first gas is subjected to chemical reaction with the compound with responsiveness after being introduced into the sealing device to change the surface tension of the functional liquid and control the opening and closing state of the valve system, and the detection device is used for detecting the opening and closing state of the valve system.
2. The adaptive valve system based on specific gas response of claim 1, wherein: when the first gas is carbon dioxide, the second gas is at least one of nitrogen, oxygen, argon and air; when the first gas is sulfur dioxide or oxygen, the second gas is at least one of nitrogen, carbon dioxide, argon and air; when the first gas is at least two of carbon dioxide, sulfur dioxide and oxygen, the second gas is at least one of nitrogen, argon and air.
3. The adaptive valve system based on specific gas response of claim 1, wherein: when the substance with surface activity in the functional liquid is a compound of polyetheramine and oleic acid and the concentration is 1mmol/L, when the first gas is carbon dioxide, if the concentration of the carbon dioxide is less than 2%, the valve system is in an open state; if the concentration of the carbon dioxide is 2% -8%, controlling the valve system to be in an open state or a closed state by adjusting the pressure of the first gas; if the carbon dioxide concentration is greater than 8%, the valve system is in a closed state.
4. The adaptive valve system based on specific gas response of claim 3, wherein: and when the valve system is in a closed state, heating the sealing device and introducing the second gas to enable the valve system to be in an open state.
5. The adaptive valve system based on specific gas response of claim 1, wherein: the pore canal material is determined according to the nature of the compound in the functional liquid, and comprises hydrophilic or hydrophobic pore canal material with the thickness of 0.05-0.5 mm and the pore diameter of 0.45-10 mu m.
6. A method of making a specific gas response based adaptive valve system according to any one of claims 1-5, wherein: the method comprises the following steps:
storing gas in a gas container, and changing the type and concentration of the gas introduced into the sealing device through a gas path switching valve connected with the gas container;
preparing functional liquid by adopting a compound with responsiveness to at least one gas in the gases, placing a pore channel material into the functional liquid to infiltrate to form a valve system, and placing the pore channel material with the valve system into a closed device;
controlling the opening and closing states of the valve system by controlling the type and concentration of the gas introduced into the sealing device;
and judging the on-off state of the valve system through a detection device.
7. The method for manufacturing the adaptive valve based on the specific gas response according to claim 6, wherein the method comprises the following steps: the gas comprises a first gas and a second gas, the functional liquid contains a compound which has responsiveness with the first gas, when the first gas is carbon dioxide, the second gas is at least one of nitrogen, oxygen, argon and air, and when the first gas is introduced to enable the valve system to be in a closed state, the sealing device is heated and the second gas is introduced to enable the valve system to be in an open state; when the first gas is sulfur dioxide or oxygen, the second gas is at least one of nitrogen, carbon dioxide, argon and air; when the first gas is at least two of carbon dioxide, sulfur dioxide and oxygen, the second gas is at least one of nitrogen, argon and air.
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