CN117771946B - Preparation process of composite pervaporation membrane - Google Patents
Preparation process of composite pervaporation membrane Download PDFInfo
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- CN117771946B CN117771946B CN202410006613.XA CN202410006613A CN117771946B CN 117771946 B CN117771946 B CN 117771946B CN 202410006613 A CN202410006613 A CN 202410006613A CN 117771946 B CN117771946 B CN 117771946B
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- 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
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Abstract
The invention discloses a preparation process of a composite pervaporation membrane, which comprises the following steps: preparing a gas selective material and a membrane carrier material, selecting polyamide as the gas selective material and polyester as the membrane carrier material, and preparing a membrane carrier: dissolving polyester in a solvent to prepare a film solution, uniformly coating the film solution on a matrix to prepare a film carrier, and preparing a permeable layer: the polyamide is dissolved in an organic solvent to prepare a permeable layer material solution, the preparation technology of the composite permeable membrane from step one to step six is used for solving the problems of more steps, more time and energy consumption, higher preparation cost and slower cutting speed in the cutting step, and the finally prepared composite permeable membrane has stronger universality, can be used for purifying alcohols and acids, and has the purity of 92-97 percent.
Description
Technical Field
The invention relates to the technical field of pervaporation membrane preparation, in particular to a preparation process of a composite pervaporation membrane.
Background
The composite pervaporation membrane is a membrane material special for gas separation, and the working principle of the composite pervaporation membrane is to utilize the free diffusion effect of gas molecules in the membrane material, so that the separation of different gas molecules is realized, and the composite pervaporation membrane has the advantages of high separation efficiency, simplicity and convenience in operation, energy conservation and environmental protection, so that the composite pervaporation membrane is widely applied to the field of gas separation.
The existing preparation process of the composite pervaporation membrane involves more steps, more time and energy are needed to be consumed, the preparation cost is higher, and in the cutting step, the cutting speed is slower, so that the preparation process of the composite pervaporation membrane is needed to solve the technical problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a preparation process of a composite pervaporation membrane, which solves the problems that more steps are involved, more time and energy are needed to be consumed, the preparation cost is higher, and the cutting speed is lower in the cutting step.
In order to achieve the above purpose, the invention is realized by the following technical scheme: a process for preparing a composite pervaporation membrane, the process comprising the steps of:
Step one, material preparation: preparing a gas selective material and a membrane carrier material, selecting polyamide as the gas selective material and polyester as the membrane carrier material;
step two, preparing a membrane carrier: dissolving polyester in a solvent to prepare a film solution, and uniformly coating the film solution on a substrate to prepare a film carrier;
step three, preparation of a permeable layer: dissolving polyamide in an organic solvent to prepare a permeable layer material solution, and uniformly coating the permeable layer material solution on the surface of a membrane carrier to prepare a permeable layer;
Step four, film assembly: laminating the permeable layer and the membrane carrier together according to the sequence that the membrane carrier is above and the permeable layer is below, and compounding the permeable layer and the membrane carrier with the assistance of a hot pressing method to prepare the composite pervaporation membrane;
step five, film forming treatment: reinforcing and curing the composite pervaporation membrane by using an oven;
step six, cutting and packaging: cutting the composite pervaporation membrane, and then placing the cut composite pervaporation membrane into a module for packaging.
Further, in the second step, the film solution is uniformly covered on the surface of the whole substrate by using a roll coating method, and the coated film carrier is placed in an oven for heating and drying, so that the film carrier is dehydrated and solidified, wherein the temperature of the oven is set to be 40-80 ℃.
In the third step, the material solution of the permeable layer is uniformly covered on the surface of the membrane carrier by using a roll coating method, and the permeable layer is placed in an oven for heating and drying, so that the permeable layer is dehydrated and solidified, wherein the temperature of the oven is set between 40 ℃ and 80 ℃.
Further, in the fourth step, the hot pressing temperature is controlled to be 100-200 ℃, the hot pressing pressure is controlled to be 0.5-5MPa, and the hot pressing time is controlled to be 5-30 minutes.
Further, in the fifth step, the temperature of the oven is set to be 50-80 ℃, and the drying time of the oven is controlled to be 5-15 hours.
In the sixth step, the cutting tool is a laser cutting machine, the laser cutting machine emits laser beams to scan and cut on the composite pervaporation membrane, and after cutting is completed, waste materials generated in the cutting process are cleaned.
In the sixth step, the module includes a flat module, a spiral winding module, and a tubular module.
In the sixth step, before packaging, the module is in a clean and dust-free state, and then the composite pervaporation membrane is flatly placed in the module.
Advantageous effects
The invention provides a preparation process of a composite pervaporation membrane. Compared with the prior art, the method has the following beneficial effects:
1. the preparation process of the composite pervaporation membrane solves the problems that more steps are involved, more time and energy are needed to be consumed, the preparation cost is high, and the cutting speed is low in the cutting step, and the finally prepared composite pervaporation membrane has strong universality and can be used for purifying organic substances such as alcohols and acids, and the purity achieved by the purification is 92-97%.
2. A preparation process of a composite pervaporation membrane, in the fourth step, a hot pressing method is used to enable a permeation layer and a membrane carrier to be better combined together, fusion and cross diffusion between the permeation layer and the membrane carrier are accelerated, interface combination is promoted, and mechanical strength of the composite pervaporation membrane can be improved.
3. In the sixth step, the cutting tool is a laser cutting machine, and laser beams emitted by the laser cutting machine scan and cut on the composite pervaporation membrane, so that the rapid, accurate and non-contact cutting is realized, the preparation efficiency is improved, and the amount of waste materials generated by the laser cutting is small, so that the cleaning is easy.
Drawings
FIG. 1 is a general flow chart of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the embodiment of the invention provides three technical schemes:
example 1: a process for preparing a composite pervaporation membrane, the process comprising the steps of:
Step one, material preparation: preparing a gas selective material and a membrane carrier material, selecting polyamide as the gas selective material and polyester as the membrane carrier material;
step two, preparing a membrane carrier: dissolving polyester in a solvent to prepare a film solution, and uniformly coating the film solution on a substrate to prepare a film carrier;
step three, preparation of a permeable layer: dissolving polyamide in an organic solvent to prepare a permeable layer material solution, and uniformly coating the permeable layer material solution on the surface of a membrane carrier to prepare a permeable layer;
Step four, film assembly: laminating the permeable layer and the membrane carrier together according to the sequence that the membrane carrier is above and the permeable layer is below, and compounding the permeable layer and the membrane carrier with the assistance of a hot pressing method to prepare the composite pervaporation membrane;
step five, film forming treatment: reinforcing and curing the composite pervaporation membrane by using an oven;
step six, cutting and packaging: cutting the composite pervaporation membrane, and then placing the cut composite pervaporation membrane into a module for packaging, wherein the finally prepared composite pervaporation membrane has strong universality and can be used for purifying alcohols and acids, and the purity achieved by the purification is 92-97%.
In the second step, the film solution uniformly covers the whole surface of the matrix by using a roll coating method, and the coated film carrier is placed in an oven for heating and drying to dehydrate and solidify the film carrier, wherein the temperature of the oven is set at 40 ℃.
And thirdly, uniformly covering the surface of the membrane carrier with the permeable layer material solution by using a roll coating method, and placing the permeable layer in an oven for heating and drying to dehydrate and solidify the permeable layer, wherein the temperature of the oven is set at 40 ℃.
In the fourth step, the hot pressing temperature is controlled to be 100 ℃, the hot pressing pressure is controlled to be 1MPa, and the hot pressing time is controlled to be 5 minutes.
In the fifth step, the temperature of the oven is set at 50 ℃, and the drying time of the oven is controlled at 5 hours.
In the sixth step, the cutting tool is a laser cutting machine, the laser cutting machine emits laser beams to scan and cut on the composite pervaporation membrane, and after cutting is completed, waste materials generated in the cutting process are cleaned.
In the sixth step, the module comprises a flat plate module, a spiral winding module and a tubular module.
In the sixth step, before packaging, the module is in a clean dust-free state, and then the composite pervaporation membrane is flatly placed in the module.
Example 2: a process for preparing a composite pervaporation membrane, the process comprising the steps of:
Step one, material preparation: preparing a gas selective material and a membrane carrier material, selecting polyamide as the gas selective material and polyester as the membrane carrier material;
step two, preparing a membrane carrier: dissolving polyester in a solvent to prepare a film solution, and uniformly coating the film solution on a substrate to prepare a film carrier;
step three, preparation of a permeable layer: dissolving polyamide in an organic solvent to prepare a permeable layer material solution, and uniformly coating the permeable layer material solution on the surface of a membrane carrier to prepare a permeable layer;
Step four, film assembly: laminating the permeable layer and the membrane carrier together according to the sequence that the membrane carrier is above and the permeable layer is below, and compounding the permeable layer and the membrane carrier with the assistance of a hot pressing method to prepare the composite pervaporation membrane;
step five, film forming treatment: reinforcing and curing the composite pervaporation membrane by using an oven;
step six, cutting and packaging: cutting the composite pervaporation membrane, and then placing the cut composite pervaporation membrane into a module for packaging, wherein the finally prepared composite pervaporation membrane has strong universality and can be used for purifying alcohols and acids, and the purity achieved by the purification is 92-97%.
In the second step, the film solution uniformly covers the whole surface of the matrix by using a roll coating method, and the coated film carrier is placed in an oven for heating and drying to dehydrate and solidify the film carrier, wherein the temperature of the oven is set at 60 ℃.
And thirdly, uniformly covering the surface of the membrane carrier with the permeable layer material solution by using a roll coating method, and placing the permeable layer in an oven for heating and drying to dehydrate and solidify the permeable layer, wherein the temperature of the oven is set at 60 ℃.
In the fourth step, the hot pressing temperature is controlled to be 150 ℃, the hot pressing pressure is controlled to be 3MPa, and the hot pressing time is controlled to be 15 minutes.
In the fifth step, the temperature of the oven is set at 60 ℃, and the drying time of the oven is controlled at 10 hours.
In the sixth step, the cutting tool is a laser cutting machine, the laser cutting machine emits laser beams to scan and cut on the composite pervaporation membrane, and after cutting is completed, waste materials generated in the cutting process are cleaned.
In the sixth step, the module comprises a flat plate module, a spiral winding module and a tubular module.
In the sixth step, before packaging, the module is in a clean dust-free state, and then the composite pervaporation membrane is flatly placed in the module.
Example 3: a process for preparing a composite pervaporation membrane, the process comprising the steps of:
Step one, material preparation: preparing a gas selective material and a membrane carrier material, selecting polyamide as the gas selective material and polyester as the membrane carrier material;
step two, preparing a membrane carrier: dissolving polyester in a solvent to prepare a film solution, and uniformly coating the film solution on a substrate to prepare a film carrier;
step three, preparation of a permeable layer: dissolving polyamide in an organic solvent to prepare a permeable layer material solution, and uniformly coating the permeable layer material solution on the surface of a membrane carrier to prepare a permeable layer;
Step four, film assembly: laminating the permeable layer and the membrane carrier together according to the sequence that the membrane carrier is above and the permeable layer is below, and compounding the permeable layer and the membrane carrier with the assistance of a hot pressing method to prepare the composite pervaporation membrane;
step five, film forming treatment: reinforcing and curing the composite pervaporation membrane by using an oven;
step six, cutting and packaging: cutting the composite pervaporation membrane, and then placing the cut composite pervaporation membrane into a module for packaging, wherein the finally prepared composite pervaporation membrane has strong universality and can be used for purifying alcohols and acids, and the purity achieved by the purification is 92-97%.
In the second step, the film solution uniformly covers the whole surface of the matrix by using a roll coating method, and the coated film carrier is placed in an oven for heating and drying, so that the film carrier is dehydrated and solidified, wherein the temperature of the oven is set at 80 ℃.
And thirdly, uniformly covering the surface of the membrane carrier with the permeable layer material solution by using a roll coating method, and placing the permeable layer in an oven for heating and drying to dehydrate and solidify the permeable layer, wherein the temperature of the oven is set at 80 ℃.
In the fourth step, the hot pressing temperature is controlled to be 200 ℃, the hot pressing pressure is controlled to be 5MPa, and the hot pressing time is controlled to be 30 minutes.
In the fifth step, the temperature of the oven is set at 80 ℃, and the drying time of the oven is controlled at 15 hours.
In the sixth step, the cutting tool is a laser cutting machine, the laser cutting machine emits laser beams to scan and cut on the composite pervaporation membrane, and after cutting is completed, waste materials generated in the cutting process are cleaned.
In the sixth step, the module comprises a flat plate module, a spiral winding module and a tubular module.
In the sixth step, before packaging, the module is in a clean dust-free state, and then the composite pervaporation membrane is flatly placed in the module.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present 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 therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A preparation process of a composite pervaporation membrane is characterized in that: the process comprises the following steps:
Step one, material preparation: preparing a gas selective material and a membrane carrier material, selecting polyamide as the gas selective material and polyester as the membrane carrier material;
step two, preparing a membrane carrier: dissolving polyester in a solvent to prepare a film solution, and uniformly coating the film solution on a substrate to prepare a film carrier;
step three, preparation of a permeable layer: dissolving polyamide in an organic solvent to prepare a permeable layer material solution, and uniformly coating the permeable layer material solution on the surface of a membrane carrier to prepare a permeable layer;
Step four, film assembly: laminating the permeable layer and the membrane carrier together according to the sequence that the membrane carrier is above and the permeable layer is below, and compounding the permeable layer and the membrane carrier with the assistance of a hot pressing method to prepare the composite pervaporation membrane;
step five, film forming treatment: reinforcing and curing the composite pervaporation membrane by using an oven;
step six, cutting and packaging: cutting the composite pervaporation membrane, and then placing the cut composite pervaporation membrane into a module for packaging;
In the second step, a roll coating method is utilized to uniformly cover the surface of the whole matrix, the coated film carrier is placed in an oven for heating and drying, and the film carrier is dehydrated and solidified, wherein the temperature of the oven is set between 40 ℃ and 80 ℃;
In the third step, a roll coating method is utilized to uniformly cover the surface of the membrane carrier with the permeable layer material solution, the permeable layer is placed in an oven for heating and drying, and the permeable layer is dehydrated and solidified, wherein the temperature of the oven is set to be 40-80 ℃;
in the fourth step, the hot pressing temperature is controlled to be 100-200 ℃, the hot pressing pressure is controlled to be 0.5-5MPa, and the hot pressing time is controlled to be 5-30 minutes;
In the fifth step, the temperature of the oven is set to be 50-80 ℃, and the drying time of the oven is controlled to be 5-15 hours;
In the sixth step, the cutting tool is a laser cutting machine, the laser cutting machine emits laser beams to scan and cut on the composite pervaporation membrane, and after cutting is completed, waste materials generated in the cutting process are cleaned.
2. The process for preparing a composite pervaporation membrane according to claim 1, wherein: in the sixth step, the module comprises a flat plate module, a spiral winding module and a tubular module.
3. The process for preparing a composite pervaporation membrane according to claim 1, wherein: in the sixth step, before packaging, the module is in a clean dust-free state, and then the composite pervaporation membrane is flatly placed in the module.
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| CN117771946B true CN117771946B (en) | 2024-07-26 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5085776A (en) * | 1989-06-02 | 1992-02-04 | Membrane Technology & Research, Inc. | Composite membranes for fluid separations |
| CN113509848A (en) * | 2021-04-27 | 2021-10-19 | 北京工业大学 | A method for preparing polyether block amide pervaporation composite membrane based on liquid-liquid interface |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112717699B (en) * | 2020-12-09 | 2022-04-01 | 青岛科技大学 | nanofiber/MOFs-based preferential permeable alcohol type pervaporation membrane and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5085776A (en) * | 1989-06-02 | 1992-02-04 | Membrane Technology & Research, Inc. | Composite membranes for fluid separations |
| CN113509848A (en) * | 2021-04-27 | 2021-10-19 | 北京工业大学 | A method for preparing polyether block amide pervaporation composite membrane based on liquid-liquid interface |
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| CN117771946A (en) | 2024-03-29 |
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