Method and device for preparing biological membrane

Abstract

The invention provides a method for preparing a biological membrane, which comprises the following steps: obtaining preparation raw materials including a metal organic framework compound and a metal-induced ordered microporous polymer; mixing a metal organic framework compound with the metal-induced ordered microporous polymer under a first preset condition to obtain a suspension; selecting a substrate material; and uniformly coating a substrate material with the suspension, and treating the substrate material under a second preset condition to obtain the biological membrane, so that the permeability and selectivity of the carbon dioxide can be remarkably improved by optimizing the pore structure and surface characteristics of the biological membrane material, and the carbon dioxide can be more effectively captured from the flue gas.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide capture, and in particular to a method and device for preparing a biofilm. Background Art

[0002] In the process of carbon dioxide capture, biofilm separation is a technology that uses a special semi-permeable biomembrane to separate carbon dioxide from other gases. This separation method is based on the selective permeability of the biomembrane, that is, the biomembrane allows certain gas molecules to pass through while preventing other gas molecules from passing through.

[0003] In the process of separating carbon dioxide by biofilm, the permeability coefficient and separation selectivity of the biofilm material to carbon dioxide are inversely proportional, that is, the biofilm material with a high carbon dioxide permeability coefficient has a lower separation selectivity for carbon dioxide and nitrogen, and nitrogen will also pass through, so that the carbon dioxide content in the product gas after separation is still relatively low. Summary of the invention

[0004] The main purpose of the present invention is to provide a method and device for preparing a biofilm, so as to solve the problem of low carbon dioxide separation content in mixed gas by the biofilm in the prior art.

[0005] In order to achieve the above object, according to one aspect of the present invention, a method for preparing a biofilm is provided, the method for preparing a biofilm comprising:

[0006] Obtaining preparation raw materials, the preparation raw materials include metal organic framework compounds and metal induced ordered microporous polymers;

[0007] Mixing the metal organic framework compound and the metal induced ordered microporous polymer under a first preset condition to obtain a suspension;

[0008] Select the substrate material;

[0009] The suspension is uniformly coated on a substrate material and treated under a second preset condition to obtain a biofilm.

[0010] Furthermore, the step of obtaining the metal organic framework compound includes:

[0011] Using zinc nitrate hexahydrate and 2-methylimidazole as raw materials and deionized water as solvent to chemically react under a third preset condition to obtain a metal organic framework compound;

[0012] Among them, the third preset condition is: the reaction temperature is 120° C., and the reaction time is 24 hours.

[0013] Further, the step of metal-induced ordered microporous polymer comprises:

[0014] Using an amino-rich polymer, an organic small molecule ligand containing a carboxyl group and a chlorine atom, and a metal ion as raw materials, and using deionized water or an organic solvent as a solvent, a chemical reaction occurs under a fourth preset condition to obtain a metal-induced ordered microporous polymer;

[0015] Among them, the fourth preset condition is: the reaction temperature is 70° C., and the reaction time is 48 hours.

[0016] Furthermore, the first preset condition is:

[0017] The solvent is deionized water or an organic solvent.

[0018] Furthermore, the second preset condition is:

[0019] The drying temperature is room temperature and the drying time is 24 hours.

[0020] Further, the steps after processing under the second preset condition also include:

[0021] placing the first product obtained under the second preset condition in a vacuum environment to eliminate bubbles and moisture in the first product to obtain a second product;

[0022] The second product is heat treated to obtain a biofilm.

[0023] Furthermore, the step of heat treating the second product to obtain a biofilm includes:

[0024] The second product is heat treated at a heat treatment temperature of 100° C. for two hours to obtain a biofilm, so as to enhance the stability and mechanical strength of the biofilm.

[0025] Furthermore, the step of heat treating the second product to obtain a biofilm includes:

[0026] The second product is heat treated at a heat treatment temperature of 100° C. for two hours to obtain a biofilm, so as to enhance the stability and mechanical strength of the biofilm.

[0027] Furthermore, the organic solvent is ethanol.

[0028] Furthermore, the substrate material is porous stainless steel hollow fiber.

[0029] According to another aspect of the present invention, there is provided a device for preparing a biofilm, comprising:

[0030] An acquisition module, wherein the acquisition module is configured to acquire metal organic framework compounds and metal induced ordered microporous polymers;

[0031] A mixing module, wherein the mixing module is configured to mix the metal organic framework compound and the metal induced ordered microporous polymer under a first preset condition to obtain a suspension;

[0032] A selection module, the selection module is configured to select a substrate material for preparing a biofilm;

[0033] The coating module is configured to uniformly coat the suspension on the base material and process it under a second preset condition to obtain a biofilm.

[0034] By applying the technical solution of the present invention, the permeability and selectivity of carbon dioxide can be significantly improved by optimizing the pore structure and surface properties of the biofilm material, thereby more effectively capturing carbon dioxide from flue gas. The captured carbon dioxide can be used for industrial utilization or storage, reducing its emission into the atmosphere, and helping to mitigate global climate change. The nano-cylindrical morphology and unit framework structure of the metal ordered microporous polymer can be used to enhance the mechanical strength and pressure resistance of the biofilm, making it more suitable for use in industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0036] Figure 1 A flow chart showing a method for preparing a biofilm according to the present invention is shown;

[0037] Figure 2 A schematic diagram of a device for preparing a biofilm provided in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0040] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0041] In the process of carbon dioxide capture, biofilm separation is a technology that uses a special semi-permeable biomembrane to separate carbon dioxide from other gases. This separation method is based on the selective permeability of the biomembrane, that is, the biomembrane allows certain gas molecules to pass through while preventing other gas molecules from passing through.

[0042] In the process of separating carbon dioxide by biofilm, the permeability coefficient and separation selectivity of the biofilm material to carbon dioxide are inversely proportional, that is, the biofilm material with a high carbon dioxide permeability coefficient has a lower separation selectivity for carbon dioxide and nitrogen, and nitrogen will also pass through, so that the carbon dioxide content in the product gas after separation is still relatively low.

[0043] Therefore, the present application provides a method and device for preparing a biofilm in response to the above problems.

[0044] First, the present invention provides a method for preparing a biofilm. The method for preparing a biofilm comprises:

[0045] S1. obtaining preparation raw materials, wherein the preparation raw materials include metal organic framework compounds and metal induced ordered microporous polymers;

[0046] The steps to obtain metal organic framework compounds include:

[0047] Using zinc nitrate hexahydrate and 2-methylimidazole as raw materials and deionized water as solvent to chemically react under a third preset condition to obtain a metal organic framework compound;

[0048] The third preset condition is: reaction temperature is 120°C, reaction time is 24 hours;

[0049] The steps of metal-induced ordered microporous polymers include:

[0050] Using an amino-rich polymer, an organic small molecule ligand containing a carboxyl group and a chlorine atom, and a metal ion as raw materials, and using deionized water or an organic solvent as a solvent, a chemical reaction occurs under a fourth preset condition to obtain a metal-induced ordered microporous polymer;

[0051] Among them, the fourth preset condition is: the reaction temperature is 70° C., and the reaction time is 48 hours.

[0052] Specifically, Figure 1 As shown, the present application provides a method for preparing a biofilm, and the method for preparing a biofilm comprises:

[0053] Obtaining a preparation raw material, wherein the preparation raw material includes a metal organic framework compound and a metal induced ordered microporous polymer, and the steps of obtaining the metal organic framework compound are:

[0054] Obtain zinc nitrate hexahydrate and 2-methylimidazole, and use deionized water as a solvent, and mix the obtained zinc nitrate hexahydrate and 2-methylimidazole together under a third preset condition to allow them to undergo a chemical reaction, so as to obtain a metal organic framework compound, wherein the third preset condition is that the reaction temperature for the chemical reaction is 120° C. and the reaction time is 24 hours;

[0055] The steps to obtain metal-induced ordered microporous polymers are:

[0056] Obtain an amino-rich polymer, an organic small molecule ligand containing carboxyl groups and chlorine atoms, and metal ions, and use deionized water or an organic solvent as a solvent to undergo a chemical reaction under the fourth preset condition to obtain a metal-induced ordered microporous polymer, wherein the fourth preset condition is that the reaction temperature is 70°C and the reaction time is 48 hours, and the reaction generates a metal-induced ordered microporous polymer.

[0057] By optimizing the pore structure and surface properties of biofilm materials, the permeability and selectivity of carbon dioxide can be significantly improved, thereby more effectively capturing carbon dioxide from flue gas. The captured carbon dioxide can be used for industrial utilization or storage, reducing its emission into the atmosphere, and helping to mitigate global climate change. The nanocylindrical morphology and unit framework structure of metal ordered microporous polymers can be used to enhance the mechanical strength and pressure resistance of the biofilm, making it more suitable for use in industrial applications.

[0058] S2, mixing the metal organic framework compound and the metal induced ordered microporous polymer under a first preset condition to obtain a suspension, wherein the first preset condition is: the solvent is deionized water or an organic solvent, and the organic solvent is ethanol;

[0059] Specifically, the metal organic framework compound and the metal induced ordered microporous polymer are mixed together under a first preset condition to obtain a suspension, wherein the first preset condition is that the solvent is deionized water or an organic solvent, and when the solvent is an organic solvent, ethanol is selected as the organic solvent.

[0060] S3, selecting a substrate material, wherein the substrate material is a porous stainless steel hollow fiber;

[0061] Specifically, when selecting the base material, porous stainless steel hollow fibers are selected.

[0062] S4. Evenly coating the suspension on the base material, and treating it under the second preset condition to obtain a biofilm.

[0063] The second preset condition is: the drying temperature is room temperature, and the drying time is 24 hours.

[0064] placing the first product obtained under the second preset condition in a vacuum environment to eliminate bubbles and moisture in the first product to obtain a second product;

[0065] The second product is heat treated to obtain a biofilm.

[0066] Wherein, the step of heat treating the second product to obtain a biofilm comprises:

[0067] The second product is heat treated at a heat treatment temperature of 100° C. for two hours to obtain a biofilm, so as to enhance the stability and mechanical strength of the biofilm.

[0068] Specifically, the prepared suspension is coated on the base material and dried at room temperature for 24 hours. The first product is placed in a vacuum environment to eliminate bubbles and moisture in the first product. After removing the bubbles and moisture in the first product, the second product is obtained. The second product is then heat-treated at 100°C for two hours to obtain a biofilm. The purpose of the heat treatment is to enhance the stability and mechanical strength of the biofilm.

[0069] Through post-processing steps such as heat treatment and vacuum treatment, the durability and chemical corrosion resistance of the biofilm can be improved, and the service life of the biofilm can be extended. By precisely controlling the synthesis and coating process of the biofilm material, the uniformity and defect-free nature of the biofilm layer can be ensured, cracks and unevenness can be avoided, and the overall performance of the biofilm can be improved. In view of the structural instability of metal-organic framework compounds under humid conditions, the introduction of metal-induced microporous polymers can improve the stability of the biofilm in a humid environment.

[0070] The embodiment of the present application provides a device for preparing a biofilm based on the above embodiment. The device for preparing a biofilm includes:

[0071] An acquisition module, wherein the acquisition module is configured to acquire metal organic framework compounds and metal induced ordered microporous polymers;

[0072] A mixing module, wherein the mixing module is configured to mix the metal organic framework compound and the metal induced ordered microporous polymer under a first preset condition to obtain a suspension;

[0073] A selection module, the selection module is configured to select a substrate material for preparing a biofilm;

[0074] The coating module is configured to uniformly coat the suspension on the base material and process it under a second preset condition to obtain a biofilm.

[0075] Specifically, Figure 2 As shown, the device for preparing the biofilm includes an acquisition module 1, which is configured to obtain a metal organic framework compound and a metal induced ordered microporous polymer. The acquisition module 1 is connected to a mixing module 2, which is configured to mix the metal organic framework compound and the metal induced ordered microporous polymer under a first preset condition to obtain a suspension. The mixing module 2 is connected to a selection module 3, which is configured to select a base material for preparing the biofilm. The selection module 3 is connected to a coating module 4, which is configured to uniformly coat the suspension on the base material and treat it under a second preset condition to obtain a biofilm.

[0076] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: by optimizing the pore structure and surface characteristics of the biofilm material, the permeability and selectivity of carbon dioxide can be significantly improved, so that carbon dioxide can be more effectively captured from the flue gas. The captured carbon dioxide can be used for industrial utilization or storage, reducing its emission into the atmosphere, and helping to mitigate global climate change. The nanocylindrical morphology and unit framework structure of the metal organic ordered microporous polymer can be used to enhance the mechanical strength and pressure resistance of the biofilm, making it more suitable for use in industrial applications. Through post-treatment steps such as heat treatment and vacuum treatment, the durability and chemical corrosion resistance of the biofilm can be improved, and the service life of the biofilm can be extended. By precisely controlling the synthesis and coating process of the biofilm material, the uniformity and defect-freeness of the biofilm layer can be ensured, cracks and unevenness can be avoided, and the overall performance of the biofilm can be improved. In view of the problem of structural instability of metal organic framework compounds under humid conditions, the introduction of metal-induced microporous polymers can improve the stability of the biofilm in a humid environment.

[0077] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0078] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0079] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing biofilm, characterized in that include: Obtain preparation raw materials including metal organic framework compounds and metal-induced ordered microporous polymers; The metal organic framework compound is mixed with the metal-induced ordered microporous polymer under a first preset condition to obtain a suspension; Select the substrate material; The suspension is uniformly coated on the substrate material and treated under a second preset condition to obtain a biofilm.

2. The method of preparing a biofilm according to claim 1, characterized in that The steps of obtaining metal organic framework compounds include: A chemical reaction occurs under the third preset condition using zinc nitrate hexahydrate and 2-methylimidazole as raw material and deionized water as solvent to obtain the metal organic framework compound; Among them, the third preset condition is: the reaction temperature is 120°C and the reaction time is 24 hours.

3. The method of preparing a biofilm according to claim 1, characterized in that The steps of inducing the ordered microporous polymers include: Using an amino-rich polymer, an organic small molecule ligand containing a carboxyl group and a chlorine atom, and a metal ion as raw materials, and using deionized water or an organic solvent as a solvent, a chemical reaction occurs under a fourth preset condition to obtain the metal-induced ordered microporous polymer; Among them, the fourth preset condition: the reaction temperature is 70°C and the reaction time is 48 hours.

4. The method of preparing a biofilm according to any one of claims 1 to 3, characterized in that The first preset condition is: The solvent is deionized water or an organic solvent.

5. The method of preparing a biofilm according to any one of claims 1 to 3, characterized in that The second preset condition is: The drying temperature is room temperature and the drying time is 24 hours.

6. The method of preparing a biofilm according to any one of claims 1 to 3, characterized in that The steps after processing under the second preset condition further include: The first product obtained under the second preset condition is placed in a vacuum environment to eliminate bubbles and moisture in the first product to obtain the second product; The second product is heat treated to obtain the biofilm.

7. The method of preparing a biofilm according to claim 6, characterized in that The step of heat treatment of the second product to obtain the biofilm includes: The second product was heat treated for two hours at a heat treatment temperature of 100°C to obtain the biofilm to enhance the stability and mechanical strength of the biofilm.

8. The method of preparing a biofilm according to claim 3, characterized in that The organic solvent is ethanol.

9. The method of preparing a biofilm according to claim 1, characterized in that The substrate material is porous stainless steel hollow fibers.

10. A device for preparing biofilm, characterized in that include: A obtaining module configured to acquire metal organic framework compounds and metal-induced ordered microporous polymers; A mixing module configured to mix the metal organic frame compound with the metal-induced ordered microporous polymer under a first preset condition to obtain a suspension; Selection module configured to select the substrate material for preparing the biofilm; A coating module configured to uniformly coat the suspension on the substrate material and process under a second preset condition to obtain a biofilm.

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