CN218485652U - Enhanced polyvinylidene fluoride polyvinyl chloride composite film - Google Patents
Enhanced polyvinylidene fluoride polyvinyl chloride composite film Download PDFInfo
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- CN218485652U CN218485652U CN202222265037.XU CN202222265037U CN218485652U CN 218485652 U CN218485652 U CN 218485652U CN 202222265037 U CN202222265037 U CN 202222265037U CN 218485652 U CN218485652 U CN 218485652U
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- complex film
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- polyvinyl chloride
- polyvinylidene fluoride
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Abstract
The utility model belongs to the technical field of the complex film, especially, enhancement mode polyvinylidene fluoride polyvinyl chloride complex film, including the complex film body, the complex film body comprises supporting layer, supporting layer surface fixed connection's filter layer and the cast membrane liquid layer that filter layer fixed surface connects. This enhancement mode polyvinylidene fluoride polyvinyl chloride complex film, through setting up the supporting layer, filter layer and casting film liquid layer, when using, through weaving the supporting layer of pipe conduct complex film, increase the bulk strength of complex film, and prepare the membrane silk as the filter layer through polyvinylidene fluoride-polyvinyl chloride polymer blend, further increase the intensity of complex film, and be connected with the casting film liquid layer through the filter layer, increase the permeation volume of complex film, increase the filtration efficiency of complex film, thereby the intensity of having solved current complex film is lower, and the separation membrane is direct and microporous membrane or milipore filter lug connection, it is lower to have the permeation volume, the problem that filtration efficiency is low.
Description
Technical Field
The utility model relates to a complex film technical field especially relates to an enhancement mode polyvinylidene fluoride polyvinyl chloride complex film.
Background
The composite membrane is a separation membrane which is supported by a microporous membrane or an ultrafiltration membrane and covered on the surface by a barrier layer which is a compact homogeneous membrane with the thickness of only 0.1 to 0.25 mu m. So that the permeation amount of the substance is greatly increased.
The existing polyvinylidene fluoride polyvinyl chloride composite membrane has the problems that the strength of the composite membrane is low, the separation membrane is directly connected with a microporous membrane or an ultrafiltration membrane, the permeability is low, and the filtration efficiency is low in the use process, so that the enhanced polyvinylidene fluoride polyvinyl chloride composite membrane is needed.
SUMMERY OF THE UTILITY MODEL
The intensity based on current complex film is lower, and the separating membrane is direct and microporous membrane or milipore filter lug connection, and it is lower to have the permeability, technical problem that filtration efficiency is low, the utility model provides an enhancement mode polyvinylidene fluoride polyvinyl chloride complex film.
The utility model provides an enhancement mode polyvinylidene fluoride polyvinyl chloride complex film, including the complex film body, the complex film body comprises supporting layer, the filter layer of supporting layer surface fixed connection and the cast membrane liquid layer of filter layer fixed surface connection.
Preferably, the interior of the support layer is a braided tube.
Preferably, the inside of the filter layer is membrane filaments, and the membrane filaments are prepared from polyvinylidene fluoride-polyvinyl chloride blended polymers.
Preferably, the membrane casting liquid layer is formed by coating a membrane casting liquid on the outer side of the weaving tube and then performing solidification and curing.
The utility model provides a beneficial effect does:
through setting up the supporting layer, filter layer and casting membrane liquid layer, when using, through weaving the pipe as the supporting layer of complex film, increase the bulk strength of complex film, and prepare the membrane silk as the filter layer through polyvinylidene fluoride-polyvinyl chloride blending polymer, further increase the intensity of complex film, and be connected with the casting membrane liquid layer through the filter layer, increase the permeation volume of complex film, increase the filtration efficiency of complex film, thereby it is lower to have solved the intensity of current complex film, and the separation membrane is direct and microporous membrane or milipore filter lug connection, it is lower to have the permeation volume, the problem that filtration efficiency is low.
Drawings
Fig. 1 is a schematic view of an enhanced polyvinylidene fluoride polyvinyl chloride composite film provided by the present invention;
fig. 2 is a perspective view of a supporting layer structure of the enhanced polyvinylidene fluoride polyvinyl chloride composite film of the present invention.
In the figure: 1. a composite membrane body; 101. a support layer; 102. a filter layer; 103. and (5) casting a membrane liquid layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-2, the reinforced polyvinylidene fluoride polyvinyl chloride composite membrane comprises a composite membrane body 1, wherein the composite membrane body 1 is composed of a support layer 101, a filter layer 102 fixedly connected to the surface of the support layer 101, and a casting membrane liquid layer 103 fixedly connected to the surface of the filter layer 102.
The inside of the support layer 101 is a braided tube.
The inside of the filter layer 102 is a membrane filament, and the membrane filament is prepared by polyvinylidene fluoride-polyvinyl chloride blending polymer.
And the membrane casting liquid layer 103 is formed by coating the membrane casting liquid on the outer side of the woven tube and then performing solidification and curing.
Preferably, the casting solution comprises: 12-40% of polyvinylidene fluoride/polyvinyl chloride blend, 2-10% of hydrophilic modifier, 0.8-10% of non-solvent, 0.5-6% of pore-forming agent and 50-80% of solvent. And (3) uniformly stirring and dissolving the casting solution at 50-90 ℃, coating the casting solution on the outer side of the weaving tube through a spinning device after vacuum defoaming, and then entering a coagulating bath for curing and forming to obtain the composite membrane.
Further, the hydrophilic agent includes: polyvinylpyrrolidone, polyethylene glycol, polymethyl acrylate, and the like.
Non-solvent: glycerol, tetraethylene glycol or propylene glycol, etc.
The pore-forming agent comprises: lithium chloride, silica, polypropylene glycol, or the like.
The solvent comprises: one or two of dimethylformamide, dimethylacetamide, dimethyl sulfoxide or triethyl phosphate.
Spinning conditions are as follows: the size of the braided tube is 1.0/1.9mm, the vacuum deaeration temperature is 30-70 ℃, the deaeration time is more than or equal to 20h, the temperature of the coagulating bath is 30-80 ℃, the coagulating bath forms 0-50 percent of DMF solution, and the spinning speed is 10-25m/min.
Through setting up supporting layer 101, filter layer 102 and casting film liquid layer 103, when using, through weaving the supporting layer 101 of pipe as the complex film, increase the bulk strength of complex film, and prepare the membrane silk as filter layer 102 through polyvinylidene fluoride-polyvinyl chloride blending polymer, further increase the intensity of complex film, and be connected with casting film liquid layer 103 through filter layer 102, increase the amount of penetration of complex film, increase the filtration efficiency of complex film, thereby the intensity of having solved current complex film is lower, and the separation membrane is direct and microporous membrane or milipore filter lug connection, it is lower to have the amount of penetration, the problem of filtration inefficiency.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (4)
1. The reinforced polyvinylidene fluoride polyvinyl chloride composite film is characterized in that: the composite membrane comprises a composite membrane body (1), wherein the composite membrane body (1) is composed of a support layer (101), a filter layer (102) fixedly connected with the surface of the support layer (101) and a casting membrane liquid layer (103) fixedly connected with the surface of the filter layer (102).
2. The reinforced polyvinylidene fluoride polyvinyl chloride composite membrane according to claim 1, characterized in that: the interior of the supporting layer (101) is a braided tube.
3. The reinforced polyvinylidene fluoride polyvinyl chloride composite membrane of claim 1, wherein: the filter layer (102) is internally provided with membrane filaments which are prepared from polyvinylidene fluoride-polyvinyl chloride blended polymers.
4. The reinforced polyvinylidene fluoride polyvinyl chloride composite membrane of claim 1, wherein: and the membrane casting liquid layer (103) is formed by coating a membrane casting liquid on the outer side of the weaving tube and then performing solidification and solidification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222265037.XU CN218485652U (en) | 2022-08-28 | 2022-08-28 | Enhanced polyvinylidene fluoride polyvinyl chloride composite film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222265037.XU CN218485652U (en) | 2022-08-28 | 2022-08-28 | Enhanced polyvinylidene fluoride polyvinyl chloride composite film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218485652U true CN218485652U (en) | 2023-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222265037.XU Active CN218485652U (en) | 2022-08-28 | 2022-08-28 | Enhanced polyvinylidene fluoride polyvinyl chloride composite film |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116712868A (en) * | 2023-06-30 | 2023-09-08 | 杭州科百特过滤器材有限公司 | Cellulose virus-removing film with high mechanical strength and preparation process thereof |
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2022
- 2022-08-28 CN CN202222265037.XU patent/CN218485652U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116712868A (en) * | 2023-06-30 | 2023-09-08 | 杭州科百特过滤器材有限公司 | Cellulose virus-removing film with high mechanical strength and preparation process thereof |
| CN116712868B (en) * | 2023-06-30 | 2023-10-31 | 杭州科百特过滤器材有限公司 | Cellulose virus-removing film with high mechanical strength and preparation process thereof |
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