CN117753222A - Microfiltration membrane processing technology with good antibacterial effect - Google Patents
Microfiltration membrane processing technology with good antibacterial effect Download PDFInfo
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- CN117753222A CN117753222A CN202311507919.5A CN202311507919A CN117753222A CN 117753222 A CN117753222 A CN 117753222A CN 202311507919 A CN202311507919 A CN 202311507919A CN 117753222 A CN117753222 A CN 117753222A
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- membrane
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- film
- microfiltration membrane
- casting
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- 239000012528 membrane Substances 0.000 title claims abstract description 85
- 238000001471 micro-filtration Methods 0.000 title claims abstract description 59
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 39
- 238000005516 engineering process Methods 0.000 title claims abstract description 16
- 238000005266 casting Methods 0.000 claims abstract description 40
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 239000003242 anti bacterial agent Substances 0.000 claims abstract description 26
- 239000000654 additive Substances 0.000 claims abstract description 25
- 230000000996 additive effect Effects 0.000 claims abstract description 25
- 238000001914 filtration Methods 0.000 claims abstract description 22
- 230000001112 coagulating effect Effects 0.000 claims abstract description 20
- 239000003960 organic solvent Substances 0.000 claims abstract description 19
- 239000002861 polymer material Substances 0.000 claims abstract description 16
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 238000003892 spreading Methods 0.000 claims abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 7
- 239000010935 stainless steel Substances 0.000 claims abstract description 7
- 238000002791 soaking Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical group C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 claims description 3
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims description 3
- DEWYXAOLJVENFO-UHFFFAOYSA-N hept-6-ene-2,4-dione Chemical group CC(=O)CC(=O)CC=C DEWYXAOLJVENFO-UHFFFAOYSA-N 0.000 claims description 3
- WVJUDQOQXFMLOH-UHFFFAOYSA-N oct-7-ene-2,4-dione Chemical group CC(=O)CC(=O)CCC=C WVJUDQOQXFMLOH-UHFFFAOYSA-N 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 3
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 3
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 2
- 230000015271 coagulation Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 238000007605 air drying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 239000013557 residual solvent Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a microfiltration membrane processing technology with good antibacterial effect, which belongs to the technical field of microfiltration membrane processing and comprises the following steps of preparation of a membrane casting agent: 25-35% of high polymer material, 5-8% of pore-forming agent, 5-12% of antibacterial agent, 13-21% of additive and 15-25% of organic solvent, starting a stirrer, continuously stirring at 40-85 ℃ for 40-120min, standing and defoaming for 1-3h to obtain casting film liquid, and filtering: filtering and removing impurities from the casting solution through a stainless steel filter screen, and coating: and (3) spreading the casting film liquid on the supporting layer until the thickness of the film liquid is 60-300 mu m, and then rapidly transferring the film liquid into a coagulating bath for curing and forming to obtain the wet microfiltration film, wherein the coagulating bath temperature is 20-45 ℃. According to the microfiltration membrane processing technology with good antibacterial effect, antibacterial materials are added into the raw materials of the membrane casting agent to be mixed and stirred to form a new membrane casting agent, so that the antibacterial performance of the microfiltration membrane in the use process is improved, the service life of the microfiltration membrane is prolonged, and meanwhile, the filtering effect of the microfiltration membrane in the working process is guaranteed.
Description
Technical Field
The invention relates to the technical field of microfiltration membrane processing, in particular to a microfiltration membrane processing technology with good antibacterial effect.
Background
The micro-filtration membrane is divided into an inorganic membrane and an organic polymer membrane according to a membrane forming material, wherein the inorganic membrane is divided into a ceramic membrane and a metal membrane, and the organic polymer membrane is divided into a natural polymer membrane and a synthetic polymer membrane; and are classified into flat plate membranes, tubular membranes, roll-type membranes and hollow fiber membranes according to the form of the membranes.
The microfiltration membrane is widely applied to filtration and impurity removal works in different industries, and along with the continuous development of social processes, the use requirements of people on the microfiltration membrane are higher.
In the conventional microfiltration membrane processing technology, the antibacterial treatment on the microfiltration membrane is generally lacking in the processing process, so that the microfiltration membrane is easy to adhere by microorganisms in water in the use process, colonize and reproduce, form colonies and develop into microbial membranes, thereby blocking membrane holes to influence the separation performance of the membrane and influence the filtering effect of the microfiltration membrane in use.
Disclosure of Invention
The invention provides a microfiltration membrane processing technology with good antibacterial effect, and aims to solve the problems that the traditional microfiltration membrane is poor in antibacterial effect and the final filtering effect is affected.
The invention is realized in such a way that the micro-filtration membrane processing technology with good antibacterial effect comprises the following steps:
1) Preparation of the casting film agent: 25-35% of high polymer material, 5-8% of pore-forming agent, 5-12% of antibacterial agent, 13-21% of additive and 15-25% of organic solvent, starting a stirrer, continuously stirring at 40-85 ℃ for 40-120min, standing and defoaming for 1-3h to obtain casting film liquid.
2) And (3) filtering: filtering and removing impurities from the casting solution through a stainless steel filter screen.
3) And (3) coating: and (3) spreading the casting film liquid on the supporting layer until the thickness of the film liquid is 60-300 mu m, and then rapidly transferring the film liquid into a coagulating bath for curing and forming to obtain the wet microfiltration film, wherein the coagulating bath temperature is 20-45 ℃.
4) Soaking: and taking out the formed film, putting the film into pure water, rinsing and soaking for 20-24 hours, and removing the organic solvent and the additive remained on the surface of the film.
5) And (5) airing and forming: and taking out the soaked membrane, and airing at room temperature to obtain the antibacterial micro-filtration membrane.
The polymer material is polyvinyl chloride, the pore-forming agent is polyethylene glycol, the antibacterial agent is a nano silver antibacterial agent, and the additive is allyl acetylacetone.
The polymer material is polyvinylidene fluoride, the pore-forming agent is polyvinylpyrrolidone, the antibacterial agent is thiazole antibacterial agent, and the additive is vinyl acetylacetone.
25% of polymer material, 5% of pore-forming agent, 5% of antibacterial agent, 13% of additive and 15% of organic solvent, starting a stirrer, continuously stirring at 40 ℃ for 40min, standing and defoaming for 2h.
The coagulating liquid is 60% ethanol water solution, and the coagulating bath temperature is 30 degrees.
And taking out the formed film, putting the film into pure water, rinsing and soaking for 20 hours, and removing the organic solvent and the additive remained on the surface of the film.
And taking out the workpiece from the oxide film hole sealing agent, cleaning for 0.5min by using clear water, taking out, putting into ionized water, and cleaning for 0.5min, wherein the temperature of the ionized water solution is 50 ℃, and the conductivity of the ionized water is 30 us/cm.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the microfiltration membrane processing technology with good antibacterial effect, antibacterial materials are added into common casting membrane raw materials to be mixed and stirred to form a new casting membrane, so that the antibacterial performance of the microfiltration membrane in the use process is improved, the service life of the microfiltration membrane is prolonged, and meanwhile, the filtering effect of the microfiltration membrane in the working process is also ensured.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, in the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
A micro-filtration membrane processing technology with good antibacterial effect comprises the following steps:
1) Preparation of the casting film agent: 25-35% of high polymer material, 5-8% of pore-forming agent, 5-12% of antibacterial agent, 13-21% of additive and 15-25% of organic solvent, starting a stirrer, continuously stirring at 40-85 ℃ for 40-120min, standing and defoaming for 1-3h to obtain casting film liquid.
2) And (3) filtering: filtering and removing impurities from the casting solution through a stainless steel filter screen.
3) And (3) coating: and (3) spreading the casting film liquid on the supporting layer until the thickness of the film liquid is 60-300 mu m, and then rapidly transferring the film liquid into a coagulating bath for curing and forming to obtain the wet microfiltration film, wherein the coagulating bath temperature is 20-45 ℃.
4) Soaking: and taking out the formed film, putting the film into pure water, rinsing and soaking for 20-24 hours, and removing the organic solvent and the additive remained on the surface of the film.
5) And (5) airing and forming: and taking out the soaked membrane, and airing at room temperature to obtain the antibacterial micro-filtration membrane.
The polymer material is polyvinyl chloride, the pore-forming agent is polyethylene glycol, the antibacterial agent is a nano silver antibacterial agent, and the additive is allyl acetylacetone.
The polymer material is polyvinylidene fluoride, the pore-forming agent is polyvinylpyrrolidone, the antibacterial agent is thiazole antibacterial agent, and the additive is vinyl acetylacetone.
25% of polymer material, 5% of pore-forming agent, 5% of antibacterial agent, 13% of additive and 15% of organic solvent, starting a stirrer, continuously stirring at 40 ℃ for 40min, standing and defoaming for 2h.
The coagulating liquid is 60% ethanol water solution, and the coagulating bath temperature is 30 deg.
The casting solution was knife coated on the support layer until the thickness of the solution was 80 μm and the coagulation bath temperature was 35 °.
And taking out the formed film, putting the film into pure water, rinsing and soaking for 20 hours, and removing the organic solvent and the additive remained on the surface of the film.
Embodiment one:
1) Preparation of the casting film agent: 25% of high polymer material, 5-85% of pore-forming agent, 3% of antibacterial agent, 13% of additive and 15% of organic solvent, starting a stirrer, continuously stirring at 40 ℃ for 60min, standing and defoaming for 2, and obtaining the casting film liquid.
2) And (3) filtering: filtering and removing impurities from the casting solution through a stainless steel filter screen.
3) And (3) coating: and (3) spreading the casting film liquid on the supporting layer until the thickness of the film liquid is 60-300 mu m, and then rapidly transferring the film liquid into a coagulating bath for curing and forming to obtain the wet microfiltration film, wherein the coagulating bath temperature is 20-45 ℃.
4) Soaking: and taking out the formed film, putting the film into pure water, rinsing and soaking for 20-24 hours, and removing the organic solvent and the additive remained on the surface of the film.
5) And (5) airing and forming: and taking out the soaked membrane, and airing at room temperature to obtain the antibacterial microfiltration.
In conclusion, according to the microfiltration membrane processing technology with good antibacterial effect, the influence of different proportions of the antibacterial agent on the final antibacterial performance of the microfiltration membrane can be observed by setting the antibacterial agent component to be lower than the optimal value and the other antibacterial agent component to be unchanged.
Embodiment two:
1) Preparation of the casting film agent: 38% of polymer material, 9% of pore-forming agent, 5% of antibacterial agent, 22% of additive and 26% of organic solvent, starting a stirrer, continuously stirring at 40 ℃ for 60min, standing and defoaming for 2h to obtain casting film liquid.
2) And (3) filtering: filtering and removing impurities from the casting solution through a stainless steel filter screen.
3) And (3) coating: and (3) spreading the casting film liquid on the supporting layer until the thickness of the film liquid is 60-300 mu m, and then rapidly transferring the film liquid into a coagulating bath for curing and forming to obtain the wet microfiltration film, wherein the coagulating bath temperature is 20-45 ℃.
4) Soaking: and taking out the formed film, putting the film into pure water, rinsing and soaking for 20-24 hours, and removing the organic solvent and the additive remained on the surface of the film.
5) And (5) airing and forming: and taking out the soaked membrane, and airing at room temperature to obtain the antibacterial micro-filtration membrane.
In summary, according to the microfiltration membrane processing technology with good antibacterial effect, the influence of other components on the antibacterial performance of the microfiltration membrane after processing can be observed by keeping the other components of the membrane casting agent within the range that the other components are higher than the optimal value and the antibacterial agent is unchanged.
Embodiment III:
1) Preparation of the casting film agent: 25-35% of high polymer material, 5-8% of pore-forming agent, 5-12% of antibacterial agent, 13-21% of additive and 15-25% of organic solvent, starting a stirrer, continuously stirring at 40-85 ℃ for 40-120min, standing and defoaming for 1-3h to obtain casting film liquid.
2) And (3) filtering: filtering and removing impurities from the casting solution through a stainless steel filter screen.
3) And (3) coating: and (3) spreading the casting film liquid on the supporting layer until the thickness of the film liquid is 60-300 mu m, and then rapidly transferring the film liquid into a coagulating bath for curing and forming to obtain the wet microfiltration film, wherein the coagulating bath temperature is 20-45 ℃.
4) Soaking: and taking out the formed film, putting the film into pure water, rinsing and soaking for 18 hours, and removing the organic solvent and the additive remained on the surface of the film.
5) And (5) airing and forming: and taking out the soaked membrane, and airing at room temperature to obtain the antibacterial micro-filtration membrane.
In summary, the micro-filtration membrane processing technology with good antibacterial effect can observe the influence of residual solvent on the final use and antibacterial performance of the micro-filtration membrane by keeping the time of soaking the membrane within a lower preferred range.
According to the microfiltration membrane processing technology with good antibacterial effect, the novel membrane casting agent is formed by adding antibacterial materials into the common membrane casting agent raw materials and mixing and stirring, so that the antibacterial performance of the microfiltration membrane in the use process is improved, the service life of the microfiltration membrane is prolonged, and meanwhile, the filtering effect of the microfiltration membrane in the working process is also ensured.
Working principle: in the process of the microfiltration membrane processing technology, the preparation, filtration, film coating, soaking and air drying molding of the film casting agent are realized, and the preparation of the antibacterial material is added into the film casting agent, so that the antibacterial performance of the microfiltration membrane after processing and production can be improved, the service life of the microfiltration membrane is prolonged, and the filtration effect of the microfiltration membrane is also ensured.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The micro-filtration membrane processing technology with good antibacterial effect is characterized by comprising the following steps:
1) Preparation of the casting film agent: 25-35% of high polymer material, 5-8% of pore-forming agent, 5-12% of antibacterial agent, 13-21% of additive and 15-25% of organic solvent, starting a stirrer, continuously stirring at 40-85 ℃ for 40-120min, standing and defoaming for 1-3h to obtain casting film liquid.
2) And (3) filtering: filtering and removing impurities from the casting solution through a stainless steel filter screen.
3) And (3) coating: and (3) spreading the casting film liquid on the supporting layer until the thickness of the film liquid is 60-300 mu m, and then rapidly transferring the film liquid into a coagulating bath for curing and forming to obtain the wet microfiltration film, wherein the coagulating bath temperature is 20-45 ℃.
4) Soaking: and taking out the formed film, putting the film into pure water, rinsing and soaking for 20-24 hours, and removing the organic solvent and the additive remained on the surface of the film.
5) And (5) airing and forming: and taking out the soaked membrane, and airing at room temperature to obtain the antibacterial micro-filtration membrane.
2. The process for preparing the microfiltration membrane with good antibacterial effect according to claim 1, wherein the polymer material is polyvinyl chloride, the pore-forming agent is polyethylene glycol, the antibacterial agent is a nano silver antibacterial agent, and the additive is allyl acetylacetone.
3. The process for preparing a microfiltration membrane with good antibacterial effect according to claim 1, wherein the polymer material is polyvinylidene fluoride, the pore-forming agent is polyvinylpyrrolidone, the antibacterial agent is thiazole antibacterial agent, and the additive is vinyl acetylacetone.
4. The process for preparing the microfiltration membrane with good antibacterial effect according to claim 1, wherein the polymer material is 25%, the pore-forming agent is 5%, the antibacterial agent is 5%, the additive is 13%, and the organic solvent is 15%, stirring is continuously carried out at 40 ℃ for 40min, and standing and defoaming are carried out for 2h.
5. The process for preparing a microfiltration membrane with good antibacterial effect according to claim 1, wherein the coagulating liquid is 60% ethanol water solution, and the coagulating bath temperature is 30 °.
6. The process for preparing a microfiltration membrane with good antibacterial effect according to claim 1, wherein the casting solution is knife coated on the supporting layer until the thickness of the casting solution is 80 μm, and the coagulation bath temperature is 35 °.
7. The process for preparing a microfiltration membrane with good antibacterial effect according to claim 1, wherein the formed membrane is taken out and put into pure water for rinsing and soaking for 20 hours, and the organic solvent and the additive remained on the surface of the membrane are removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311507919.5A CN117753222A (en) | 2023-11-14 | 2023-11-14 | Microfiltration membrane processing technology with good antibacterial effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311507919.5A CN117753222A (en) | 2023-11-14 | 2023-11-14 | Microfiltration membrane processing technology with good antibacterial effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117753222A true CN117753222A (en) | 2024-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311507919.5A Pending CN117753222A (en) | 2023-11-14 | 2023-11-14 | Microfiltration membrane processing technology with good antibacterial effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117753222A (en) |
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2023
- 2023-11-14 CN CN202311507919.5A patent/CN117753222A/en active Pending
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