Antimicrobial ceramic membrane based on carbon neutralization high saline treatment and its preparation method

Abstract

This invention discloses an antimicrobial ceramic membrane based on carbon neutralization of high-salt water treatment and its preparation method, belonging to the field of ceramic membrane technology. It includes: a support layer, serving as the supporting structure for the ceramic membrane; a filter membrane layer, disposed on the support layer, used for treating carbon neutralized high-salt water; and a corrosion-resistant layer, disposed on the support layer and filter membrane layer, used to protect the ceramic membrane from microbial erosion over a long period. This invention solves the problems of existing ceramic membranes having poor acid and alkali corrosion resistance, low antimicrobial ability, and inability to withstand prolonged erosion by various media, resulting in poor performance. This invention prepares the ceramic membrane through a support layer, filter membrane layer, and corrosion-resistant layer, which improves the ceramic membrane's acid and alkali corrosion resistance and antimicrobial ability, making the ceramic membrane highly resistant to microorganisms and able to withstand prolonged erosion by various media, thus improving the overall performance of the ceramic membrane.

Description

Technical Field

[0001] This invention relates to the field of ceramic membrane technology, specifically to an antimicrobial ceramic membrane based on carbon neutralization of high saline water treatment and its preparation method. Background Technology

[0002] Ceramic membranes, also known as inorganic ceramic membranes, are asymmetric membranes formed by preparing inorganic ceramic materials through a special process. Ceramic membranes are divided into two types: tubular ceramic membranes and flat ceramic membranes.

[0003] Tubular ceramic membranes have micropores densely distributed in their tube walls. Under pressure, the feed liquid flows inside or outside the membrane tube. Small molecules permeate through the membrane, while large molecules are retained, thus achieving separation, concentration, purification, and environmental protection. Flat ceramic membranes have micropores densely distributed on their surface. Within a certain pore size range, the permeability varies depending on the diameter of the molecules that permeate. Driven by the pressure difference across the membrane, the membrane acts as the filtration medium. Under a certain pressure, when the feed liquid flows across the membrane surface, only water, inorganic salts, and small molecules are allowed to permeate through the membrane, while large molecules such as suspended solids, colloids, and microorganisms in the water are prevented from passing through.

[0004] Ceramic membranes have many advantages, such as high separation efficiency, stable performance, good regeneration performance, simple separation process, low energy consumption, easy operation and maintenance, and long service life. They have been successfully applied in many fields such as food, beverage, biomedicine, fermentation, and fine chemicals, and can be used for separation, clarification, purification, concentration, sterilization and desalination in process technology.

[0005] Existing ceramic membranes have poor resistance to acid and alkali corrosion and low resistance to microorganisms, and cannot withstand the erosion of various media for a long time, resulting in poor performance. Summary of the Invention

[0006] The purpose of this invention is to provide an antimicrobial ceramic membrane based on carbon neutralization and high saline treatment, and a method for preparing the same. This invention can improve the acid and alkali corrosion resistance and antimicrobial ability of the ceramic membrane, making it more resistant to microorganisms and able to withstand the erosion of various media for a long time, thereby improving the performance of the ceramic membrane and solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] Antimicrobial ceramic membranes based on carbon-neutralized high-salt water treatment include:

[0009] The support layer is the support and installation structure for the ceramic membrane;

[0010] A filter membrane layer, disposed on the support layer, is used to treat carbon-neutralized high-salinity water.

[0011] A corrosion-resistant layer is set on the support layer and the filter membrane layer to help the ceramic membrane resist microbial erosion over a long period of time.

[0012] Preferably, the vertical lengths of the support layer, the filter membrane layer, and the corrosion-resistant layer are the same, and the filter membrane layer is provided with a feed liquid channel, which is used to allow carbon neutralization of high-salt water to enter the ceramic membrane.

[0013] Preferably, the pore size of the liquid feeding channel is 0.1-1 μm, and the ratio of the lateral area of ​​all the liquid feeding channels to the lateral area of ​​the ceramic membrane is 0.4-0.6:1.

[0014] Preferably, the support layer comprises the following raw materials in parts by weight: 0.5-2 parts ceramic powder, 1-8 parts pore-forming agent, 2-6 parts binder, 10-38 parts water, 1-6 parts lubricant, and 0.5-1.5 parts plasticizer.

[0015] Preferably, the filter membrane layer comprises the following raw materials in parts by weight: 10-20 parts polyvinyl alcohol, 8-15 parts micron-sized alumina, and 15-28 parts distilled water.

[0016] Preferably, the corrosion-resistant layer is a corrosion-resistant coating impregnated on the support layer and the filter membrane layer.

[0017] Preferably, the corrosion-resistant coating is an epoxy anti-corrosion coating.

[0018] According to another aspect of the present invention, a method for preparing an antimicrobial ceramic membrane based on carbon neutralization high saline treatment is provided, for preparing the antimicrobial ceramic membrane based on carbon neutralization high saline treatment as described above, comprising the following steps:

[0019] S1. Preparation of the support layer:

[0020] A certain mass of ceramic powder, pore-forming agent and binder are added to a mixer and mixed into a uniform mixture. Then, a certain mass of water, lubricant and plasticizer are added to the mixer to mix them thoroughly. The mixture is then kneaded into mud in a kneader, aged, and extruded using an extrusion molding machine to form a support layer.

[0021] S2. Preparation of the filter membrane layer:

[0022] A certain mass fraction of polyvinyl alcohol, micron-sized alumina and distilled water are added to a mixer and mixed evenly to form a filter membrane slurry. The support layer is then uniformly immersed into the filter membrane slurry. After drying and sintering, a filter membrane is formed on the support layer.

[0023] S3. Preparation of corrosion-resistant layer:

[0024] Bisphenol A epoxy resin was modified with titanium-zirconium bimetallic alkoxide to obtain titanium-zirconium modified bisphenol A epoxy resin. One part of the zirconium-zirconium modified bisphenol A epoxy resin, 0.01 parts of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester, 0.01 parts of graphene, 0.01 parts of chromium oxide green, 0.1 parts of silicon carbide, and 0.1 parts of iron phosphate (component A) were mixed to obtain a mixture. A modified phenolic amine curing agent with an amine value of 320 was added to the mixture and mixed thoroughly to form an epoxy anti-corrosion coating.

[0025] S4. Preparation of ceramic membrane:

[0026] The support layer and the filter membrane layer are immersed in the prepared epoxy anti-corrosion coating, so that the epoxy anti-corrosion coating is applied to the support layer and the filter membrane layer. After drying and sintering, a ceramic membrane is formed.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] This invention prepares a ceramic membrane by means of a support layer, a filter membrane layer and a corrosion-resistant layer, which can improve the acid and alkali corrosion resistance and antimicrobial ability of the ceramic membrane, making the ceramic membrane highly resistant to microorganisms and able to withstand the erosion of various media for a long time, thereby improving the performance of the ceramic membrane. Attached Figure Description

[0029] Figure 1 This is a side view of the antimicrobial ceramic membrane of the present invention;

[0030] Figure 2 This is a front view schematic diagram of the antimicrobial ceramic membrane of the present invention;

[0031] Figure 3 For the present invention Figure 2 Enlarged view of point A in the image.

[0032] In the diagram: 1. Support layer; 2. Filter membrane layer; 21. Feed channel; 3. Corrosion-resistant layer. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] To address the issues of poor acid and alkali corrosion resistance, low microbial resistance, and inability to withstand prolonged exposure to various media, resulting in poor performance of existing ceramic membranes, please refer to [link to relevant documentation]. Figures 1-3This embodiment provides the following technical solution:

[0035] Example

[0036] Antimicrobial ceramic membranes based on carbon-neutralized high-salt water treatment include:

[0037] Support layer 1 is the support and installation structure for the ceramic membrane;

[0038] Filter membrane layer 2, disposed on support layer 1, is used to treat carbon-neutralized high-salt water;

[0039] The corrosion-resistant layer 3 is set on the support layer 1 and the filter membrane layer 2 to help the ceramic membrane resist microbial erosion over a long period of time.

[0040] In this embodiment, as a preferred technical solution of the present invention, the vertical lengths of the support layer 1, the filter membrane layer 2 and the corrosion-resistant layer 3 are the same, and the filter membrane layer 2 is provided with a feed liquid channel 21, which is used to allow carbon neutralization of high brine to enter the ceramic membrane.

[0041] Using the above technical solution, carbon-neutralized high-salt water enters the ceramic membrane through the feed channel 21, and is filtered and separated through the filter membrane layer 2.

[0042] In this embodiment, as a preferred technical solution of the present invention, the aperture of the liquid channel 21 is 0.1-1μm, and the ratio of the transverse area of ​​all liquid channels 21 to the transverse area of ​​the ceramic membrane is 0.4-0.6:1.

[0043] Using the above technical solution, the porosity of the ceramic membrane is 40-60%, and the pore size of the feed channel 21 is 0.1-1μm. Its pore size distribution is narrow, which can quickly and comprehensively filter and separate carbon-neutralized high-salt water.

[0044] In this embodiment, as a preferred technical solution of the present invention, the support layer 1 comprises the following raw materials in parts by weight: 0.5 parts ceramic powder, 1 part pore-forming agent, 2 parts binder, 10 parts water, 1 part lubricant and 0.5 parts plasticizer.

[0045] Using the above technical solution, a certain mass of ceramic powder, pore-forming agent and binder are added to a mixer and mixed into a uniform mixture. Then, a certain mass of water, lubricant and plasticizer are added to the mixer to make them fully mixed. After being kneaded into mud in a kneader and aged, the support layer 1 is extruded using an extrusion molding machine to facilitate the preparation of ceramic membrane.

[0046] In this embodiment, as a preferred technical solution of the present invention, the filter membrane layer 2 comprises the following raw materials in parts by weight: 10 parts of polyvinyl alcohol, 8 parts of micron-sized alumina, and 15 parts of distilled water.

[0047] Using the above technical solution, a certain mass fraction of polyvinyl alcohol, micron-sized alumina and distilled water are added to a mixer and mixed evenly to form a filter membrane slurry. The support layer 1 is then uniformly immersed into the filter membrane slurry. After drying and sintering, a filter membrane layer 2 is formed on the support layer 1, which facilitates the preparation of ceramic membranes.

[0048] In this embodiment, as a preferred technical solution of the present invention, the corrosion-resistant layer 3 is a corrosion-resistant coating impregnated on the support layer 1 and the filter membrane layer 2.

[0049] By using the above technical solution, the support layer 1 and the filter membrane layer 2 are immersed in a corrosion-resistant coating, so that the corrosion-resistant coating is applied to the support layer 1 and the filter membrane layer 2. This makes the prepared ceramic membrane resistant to acid and alkali corrosion and has strong antimicrobial ability, and can withstand the erosion of various media for a long time, thus improving the performance of the ceramic membrane.

[0050] In this embodiment, as a preferred technical solution of the present invention, the corrosion-resistant coating is an epoxy anti-corrosion coating.

[0051] Using the above technical solution, epoxy anti-corrosion coatings are usually composed of two components: epoxy resin and curing agent. They have good weather resistance, low toxicity, strong resistance to acid and alkali corrosion and antimicrobial ability, and can withstand the erosion of various media for a long time, thus improving the performance of ceramic films.

[0052] To better demonstrate the preparation process of antimicrobial ceramic membranes based on carbon neutralization high-salt water treatment, this embodiment proposes a method for preparing antimicrobial ceramic membranes based on carbon neutralization high-salt water treatment as described above, including the following steps:

[0053] S1. Preparation of support layer 1:

[0054] A certain mass of ceramic powder, pore-forming agent and binder are added to a mixer and mixed into a uniform mixture. Then, a certain mass of water, lubricant and plasticizer are added to the mixer to make them fully mixed. The mixture is kneaded into mud in a kneader and aged. Then, it is extruded using an extrusion molding machine to form support layer 1.

[0055] S2. Preparation of filter membrane layer 2:

[0056] A certain mass fraction of polyvinyl alcohol, micron-sized alumina and distilled water are added to a mixer and mixed evenly to form a filter membrane slurry. The support layer 1 is immersed into the filter membrane slurry at a uniform speed. After drying and sintering, a filter membrane layer 2 is formed on the support layer 1.

[0057] S3, Preparation of corrosion-resistant layer 3:

[0058] Bisphenol A epoxy resin was modified with zirconium-zirconium bimetallic alkoxide to obtain zirconium-zirconium modified bisphenol A epoxy resin. One part of zirconium-zirconium modified bisphenol A epoxy resin, 0.01 part of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester, 0.01 part of graphene, 0.01 part of chromium oxide green, 0.1 part of silicon carbide, and 0.1 part of iron phosphate (component A) were mixed to obtain a mixture. A modified phenolic amine curing agent with an amine value of 320 was added to the mixture and mixed thoroughly to form an epoxy anti-corrosion coating.

[0059] S4. Preparation of ceramic membrane:

[0060] The support layer 1 and the filter membrane layer 2 are immersed in the prepared epoxy anti-corrosion coating, so that the epoxy anti-corrosion coating is applied to the support layer 1 and the filter membrane layer 2. After drying and sintering, a ceramic membrane is formed.

[0061] Comparative Example

[0062] Ceramic membranes, including:

[0063] Support layer 1 is the support and installation structure for the ceramic membrane;

[0064] Filter membrane layer 2, disposed on support layer 1, is used to treat carbon-neutralized high-salt water;

[0065] The support layer 1 and the filter membrane layer 2 have the same vertical length, and the filter membrane layer 2 is provided with a liquid channel 21.

[0066] The support layer 1 comprises the following raw materials in parts by weight: 0.5 parts ceramic powder, 1 part pore-forming agent, 2 parts binder, 10 parts water, 1 part lubricant and 0.5 parts plasticizer.

[0067] The filter membrane layer 2 comprises the following raw materials in parts by weight: 10 parts polyvinyl alcohol, 8 parts micron-sized alumina, and 15 parts distilled water.

[0068] Compared with the examples, the corrosion-resistant layer 3 structure was omitted in the comparative example. The ceramic film was prepared using the preparation method of the examples, and the preparation step of the corrosion-resistant layer 3 was omitted accordingly.

[0069] The ceramic membranes prepared in the examples and comparative examples were subjected to performance tests, and the results are shown in Table 1.

[0070] Table 1: Performance Test Results of Ceramic Membranes

[0071] 100% resistant to acid and alkali corrosion 100% antimicrobial Example 96.76％ 96.82％ Comparative Example 87.58％ 87.73％

[0072] As can be seen from the table above, the ceramic membrane prepared in the examples has good resistance to acid and alkali corrosion and antimicrobial properties, and can withstand the erosion of various media for a long time.

[0073] Compared with the comparative example, the embodiment showed improved acid and alkali corrosion resistance and antimicrobial properties, indicating that adding corrosion-resistant layer 3 can improve the acid and alkali corrosion resistance and antimicrobial properties of the ceramic film.

[0074] Therefore, by preparing a ceramic membrane through a support layer 1, a filter membrane layer 2, and a corrosion-resistant layer 3, the acid and alkali corrosion resistance and antimicrobial ability of the ceramic membrane can be improved, making the ceramic membrane highly resistant to microorganisms and able to withstand the erosion of various media for a long time, thus improving the performance of the ceramic membrane.

[0075] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0076] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An antimicrobial ceramic membrane based on carbon neutralization of high saline water treatment, characterized in that, include: The support layer (1) is a support and installation structure for the ceramic membrane; A filter membrane layer (2) is disposed on the support layer (1) for treating carbon-neutralized high-salt water; A corrosion-resistant layer (3) is provided on the support layer (1) and the filter membrane layer (2) to resist microbial erosion of the ceramic membrane for a long time; The vertical lengths of the support layer (1), the filter membrane layer (2) and the corrosion-resistant layer (3) are the same, and the filter membrane layer (2) is provided with a liquid channel (21), which is used to allow carbon-neutralized high-salt water to enter the ceramic membrane; The method for preparing the antimicrobial ceramic membrane based on carbon neutralization of high saline water treatment includes the following steps: S1. Preparation of the support layer (1): A certain mass of ceramic powder, pore-forming agent and binder are added to a mixer and mixed into a uniform mixture. Then, a certain mass of water, lubricant and plasticizer are added to the mixer to make them fully mixed. The mixture is kneaded into mud in a kneader and aged. Then, it is extruded using an extrusion molding machine to form a support layer (1). S2. Preparation of the filter membrane layer (2): A certain mass fraction of polyvinyl alcohol, micron-sized alumina and distilled water are added to a mixer and mixed evenly to form a filter membrane slurry. The support layer (1) is immersed into the filter membrane slurry at a uniform speed. After drying and sintering, a filter membrane layer (2) is formed on the support layer (1). S3, Preparation of corrosion-resistant layer (3): Bisphenol A epoxy resin was modified with titanium-zirconium bimetallic alkoxide to obtain titanium-zirconium modified bisphenol A epoxy resin. One part of the zirconium-zirconium modified bisphenol A epoxy resin, 0.01 parts of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester, 0.01 parts of graphene, 0.01 parts of chromium oxide green, 0.1 parts of silicon carbide, and 0.1 parts of iron phosphate (component A) were mixed to obtain a mixture. A modified phenolic amine curing agent with an amine value of 320 was added to the mixture and mixed thoroughly to form an epoxy anti-corrosion coating. S4. Preparation of ceramic membrane: The support layer (1) and the filter membrane layer (2) are immersed in the prepared epoxy anti-corrosion coating, so that the epoxy anti-corrosion coating is applied to the support layer (1) and the filter membrane layer (2). After drying and sintering, a ceramic membrane is formed.

2. The antimicrobial ceramic membrane based on carbon neutralization and high saline water treatment according to claim 1, characterized in that, The aperture of the liquid channel (21) is 0.1-1μm, and the ratio of the transverse area of ​​all the liquid channels (21) to the transverse area of ​​the ceramic membrane is 0.4-0.6:

1.

3. The antimicrobial ceramic membrane based on carbon neutralization and high saline water treatment according to claim 1, characterized in that, The support layer (1) comprises the following raw materials in parts by weight: 0.5-2 parts ceramic powder, 1-8 parts pore-forming agent, 2-6 parts binder, 10-38 parts water, 1-6 parts lubricant and 0.5-1.5 parts plasticizer.

4. The antimicrobial ceramic membrane based on carbon neutralization and high saline water treatment according to claim 1, characterized in that, The filter membrane layer (2) comprises the following raw materials in parts by weight: 10-20 parts of polyvinyl alcohol, 8-15 parts of micron-sized alumina, and 15-28 parts of distilled water.

5. The antimicrobial ceramic membrane based on carbon neutralization and high saline treatment according to claim 1, characterized in that, The corrosion-resistant layer (3) is a corrosion-resistant coating impregnated on the support layer (1) and the filter membrane layer (2).

6. The antimicrobial ceramic membrane based on carbon neutralization and high saline water treatment according to claim 5, characterized in that, The corrosion-resistant coating is an epoxy anti-corrosion coating.

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