CN113368703A - Method for preparing polyaryletherketone organic tubular membrane by pore-foaming agent - Google Patents
Method for preparing polyaryletherketone organic tubular membrane by pore-foaming agent Download PDFInfo
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Abstract
The invention discloses a method for preparing a polyaryletherketone organic tubular membrane by using a pore-foaming agent, belonging to the field of organic separation membranes. A method for preparing a polyaryletherketone organic tubular membrane by using a pore-foaming agent comprises the following steps: adding polyaryletherketone into a green solvent, stirring, adding a pore-forming agent, coating a non-woven fabric with a casting film solution, dissolving out the solvent and crystallizing the pore-forming agent in a pure water solidification bath at a temperature lower than the melting point of the pore-forming agent to perform solidification forming, transferring the solution into an extracting agent, and extracting the pore-forming agent to obtain a wet tubular film; and soaking the wet tubular membrane and then airing to obtain a dry tubular membrane.
Description
Technical Field
The invention relates to the field of organic separation membranes, in particular to a method for preparing a polyaryletherketone organic tubular membrane by using a pore-foaming agent.
Background
The membrane technology is a separation technology with low energy consumption and low cost because of low energy consumption, and the membrane separation device is simple, easy to operate, convenient to manufacture and easy to combine with other separation technologies, so that the membrane technology has wide application in many fields. The tubular membrane component has simple structure, is not easy to block and clean, and can treat high-viscosity and high-solid feed liquid.
The phenolphthalein type polyaryletherketone (PEK-C) is a novel high-performance engineering plastic of polyaryletherketone type which is independently developed and put into mass production in China, and is characterized by high temperature resistance, high mechanical strength, acid and alkali resistance and corrosion of chemical solvents, comprehensive performance comparable to that of Polyetheretherketone (PEEK), dissolubility not possessed by PEEK, and solubility in a few polar aprotic solvents and a few halogenated hydrocarbons.
Polarclean is a water-soluble polar green solvent, the chemical name is 5-dimethylamino-2-methyl-5-oxo methyl valerate, the solubility parameter is close to the traditional polar solvent, the polar solvent can replace the traditional solvent, and compared with the traditional solvent, the polar solvent has the advantages of degradability, no biological toxicity, nonflammability, very low vapor pressure (low volatility, low flash point) and the like.
Currently, the phase inversion film-forming methods commonly used in industry include non-solvent induced phase separation (NIPS) and Thermally Induced Phase Separation (TIPS). The NIPS method is used for pore-forming, which mainly adopts adding pore-forming agent, the commonly used pore-forming agent comprises polyvinylpyrrolidone (such as PVP-K15, PVP-K30, PVP-K60 and the like), polyethylene glycol (such as PEG400, PEG2000, PEG6000 and the like) and inorganic salt, the pore-forming agent is water-soluble, the pore-forming process is completed in solidification, and the influence of the components of the solidification bath, the temperature of a casting film and other factors is large; most of the pore-forming agent is dissolved out of the coagulating bath, the coagulating bath is complex in composition, so that the pore-forming agent cannot be recycled, the coagulating bath can be discharged after being treated, the environmental protection investment is increased, and the method does not conform to the current green circular economy concept. The TIPS method is mainly used for pore-forming by extracting a diluent from a membrane through an extracting agent, but the TIPS method needs to be carried out at high temperature, has high energy consumption and is easy to generate a compact skin layer and closed pores.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for preparing a polyaryletherketone organic tubular membrane by using a pore-foaming agent.
The purpose of the invention can be realized by the following technical scheme:
a method for preparing a polyaryletherketone organic tubular membrane by using a pore-foaming agent comprises the following steps:
adding polyaryletherketone into the green solvent, stirring, adding pore-forming agent,
coating non-woven fabrics with the casting solution, dissolving out a solvent and crystallizing a pore-forming agent in a pure water solidification bath at a temperature lower than the melting point of the pore-forming agent to perform solidification and molding, transferring the solution into an extracting agent, and extracting the pore-forming agent to obtain a wet tubular membrane;
and soaking the wet tubular membrane and then airing to obtain a dry tubular membrane.
Optionally, the casting solution comprises the following components in parts by weight: 10-25 parts of polyaryletherketone, 1-10 parts of pore-foaming agent and 60-80 parts of green solvent.
Optionally, the pore-forming agent is water-insoluble long-chain fatty alcohol or fatty acid with 10-20 carbon atoms.
Optionally, the porogen is tetradecanol, hexadecanol, octadecanol, eicosanol, dodecanoic acid, tetradecanoic acid, palmitic acid, or stearic acid.
Optionally, adding the polyaryletherketone, stirring, and adding a hydrophilic modifier.
Optionally, the green solvent is methyl 5-dimethylamino-2-methyl-5-oxopentanoate.
Optionally, the non-woven fabric is made of PET or PP.
Optionally, the extractant is an aqueous ethanol solution.
An organic tubular membrane is prepared from the non-woven fabric of composite membrane casting liquid through dissolving solvent out and crystallizing pore-forming agent in the solidifying bath of pure water at a temp lower than the smelting point of pore-forming agent.
Optionally, the casting solution comprises the following components in parts by weight: 10-25 parts of polyaryletherketone, 1-10 parts of pore-foaming agent and 60-80 parts of green solvent.
The invention has the beneficial effects that:
1. the invention finds out a novel pore-forming agent of the PEK-C material and develops a corresponding preparation process;
2. the method uses a green solvent, recycles the pore-foaming agent, is environment-friendly, and has low production temperature and low energy consumption;
3. compared with the traditional pore-foaming agent, the invention has the advantages of simple formula composition of the casting solution, narrow pore size distribution of the prepared membrane, high porosity and good hydrophilicity.
Drawings
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is a graph of experimental results for various examples of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In some examples of the present invention, there is provided a method for preparing a polyaryletherketone organic tubular membrane by using a porogen, comprising the following steps:
(1) PEK-C (i.e., a polyaryletherketone) is added to a green solvent (e.g., PolarClean, chemical name 5-dimethylamino-2-methyl-5-oxopentanoate) and stirred until PEK-C is completely dissolved, which can be performed at 60 ℃. Followed by addition of a porogen and a hydrophilic modifier, where the hydrophilic modifier can be pluronic F-108 or pluronic F-127. Stirring is continued to form a clear and transparent casting solution, where the temperature of the stirred mixed solution may be higher than the melting point of the porogen, for example, at 5 ℃ or higher than the melting point of the porogen.
(2) Filtering the membrane casting solution, and defoaming in vacuum to obtain a membrane casting solution for coating;
(3) coating the casting solution on a non-woven fabric support layer by using a tubular membrane integrated film forming machine, then quickly transferring to a pure water coagulation bath at 10-60 ℃, and then extracting a pore-forming agent by using 40-100% ethanol water solution at 60 ℃ to obtain the wet tubular membrane. Wherein, the non-woven fabric is made of PET or PP. The support layer of the non-woven fabric can be configured to be a composite of two layers of non-woven fabrics, and the thickness of the non-woven fabric can be 100-400 μm.
(4) And (3) soaking the wet tubular membrane in pure water for 2 days, then soaking the wet tubular membrane in a 30 wt% glycerol aqueous solution for 1 day, and finally taking out the tubular membrane and airing to obtain the dry tubular membrane.
In some examples of the invention, the casting solution comprises the following components in parts by weight: 10-25 parts of polyaryletherketone, 1-10 parts of pore-foaming agent and 60-80 parts of green solvent.
In some examples of the invention, the porogen is a water insoluble long chain fatty alcohol or fatty acid having 10-20 carbon atoms. For example, the porogen is tetradecanol, hexadecanol, octadecanol, eicosanol, dodecanoic acid, tetradecanoic acid, palmitic acid, or stearic acid.
Specific examples of the present invention are provided below.
Example 1:
(1) weighing 30g of polyaryletherketone, adding the polyaryletherketone into 150g of PolarClean solvent, stirring at 60 ℃ until the polyaryletherketone is completely dissolved, adding 2g F-108 and 10g of hexadecanol, and continuously stirring at 60 ℃ for 6 hours to obtain a clear and transparent casting solution;
(2) filtering the membrane casting solution by using a stainless steel filter screen, and performing vacuum defoaming on the filtrate to obtain a membrane casting solution for coating;
(3) coating the film casting solution on a PET non-woven fabric support layer with the inner layer being 100 microns thick by using a tubular film integrated film forming machine, and coating the PET non-woven fabric support layer with the outer layer being 200 microns thick by using a film tube, then immersing the film tube into a pure water coagulating bath at 20 ℃ for solidification and forming, and extracting a pore-forming agent from the solidified and formed film by using 80% ethanol water solution at 60 ℃ to obtain a wet tubular film;
(4) and transferring the wet tubular membrane to pure water to be soaked for 2 days, then soaking the wet tubular membrane in a 30 wt% glycerol aqueous solution for 1 day, finally taking out the wet tubular membrane, and naturally airing the wet tubular membrane at room temperature to obtain a dry tubular membrane.
Example 2:
(1) weighing 30g of polyaryletherketone, adding the polyaryletherketone into 158g of PolarClean solvent, stirring at 60 ℃ until the polyaryletherketone is completely dissolved, adding 2g F-108 g and 10g of palmitic acid, and continuously stirring at 70 ℃ for 6 hours to obtain a clear and transparent casting solution;
(2) filtering the membrane casting solution by using a stainless steel filter screen, and performing vacuum defoaming on the filtrate to obtain a membrane casting solution for coating;
(3) coating the film casting solution on a PET non-woven fabric support layer with the thickness of 125 microns on the inner layer by using a tubular film integrated film forming machine, and then soaking a film tube into a pure water coagulating bath at 20 ℃ for solidification and forming, and extracting a pore-forming agent from the solidified and formed film by using 80% ethanol water solution at 60 ℃ to obtain a wet tubular film;
(4) and transferring the wet tubular membrane to pure water to be soaked for 2 days, then soaking the wet tubular membrane in a 30 wt% glycerol aqueous solution for 1 day, finally taking out the wet tubular membrane, and naturally airing the wet tubular membrane at room temperature to obtain a dry tubular membrane.
Example 3:
(1) weighing 34g of polyaryletherketone, adding the polyaryletherketone into 146g of PolarClean solvent, stirring at 60 ℃ until the polyaryletherketone is completely dissolved, adding 12g F-108 and 8g of octadecanol, and continuously stirring at 65 ℃ for 6 hours to obtain a clear and transparent casting solution;
(2) filtering the membrane casting solution by using a stainless steel filter screen, and performing vacuum defoaming on the filtrate to obtain a membrane casting solution for coating;
(3) coating the film casting solution on a PET non-woven fabric support layer with the inner layer being 140 microns thick by using a tubular film integrated film forming machine, and coating the PET non-woven fabric support layer with the outer layer being 260 microns thick by using a film tube, then immersing the film tube into a pure water coagulating bath at 25 ℃ for solidification and forming, and extracting a pore-forming agent from the solidified and formed film by using a 60% ethanol water solution at 60 ℃ to obtain a wet tubular film;
(4) and transferring the wet tubular membrane to pure water to be soaked for 2 days, then soaking the wet tubular membrane in a 30 wt% glycerol aqueous solution for 1 day, finally taking out the wet tubular membrane, and naturally airing the wet tubular membrane at room temperature to obtain a dry tubular membrane.
Example 4:
(1) weighing 34g of polyaryletherketone, adding the polyaryletherketone into 150g of PolarClean solvent, stirring at 60 ℃ until the polyaryletherketone is completely dissolved, adding 2g F-127 g of octadecanol, and continuously stirring at 65 ℃ for 6 hours to obtain a clear and transparent casting solution;
(2) filtering the membrane casting solution by using a stainless steel filter screen, and performing vacuum defoaming on the filtrate to obtain a membrane casting solution for coating;
(3) coating the film casting solution on a PET non-woven fabric support layer with the inner layer being 140 microns thick by using a tubular film integrated film forming machine, and then soaking a film tube into a pure water coagulating bath at 15 ℃ for solidification and forming, and extracting a pore-forming agent from the solidified and formed film by using a 60% ethanol water solution to obtain a wet tubular film;
(4) and transferring the wet tubular membrane to pure water to be soaked for 2 days, then soaking the wet tubular membrane in a 30 wt% glycerol aqueous solution for 1 day, finally taking out the wet tubular membrane, and naturally airing the wet tubular membrane at room temperature to obtain a dry tubular membrane.
Example 5:
a tubular film was prepared by following the procedure of example 4, wherein the film tube was immersed in a pure water coagulation bath at 22 ℃ to be cured and formed without changing other conditions.
Example 6:
a tubular film was prepared by following the procedure of example 4, wherein the film tube was immersed in a pure water coagulation bath at 35 ℃ to be cured and formed without changing other conditions.
Example 7:
(1) weighing 38g of polyaryletherketone, adding the polyaryletherketone into 150g of PolarClean solvent, stirring at 60 ℃ until the polyaryletherketone is completely dissolved, adding 2g F-127 g of octadecanol and 10g of octadecanol, and continuously stirring at 65 ℃ for 6 hours to obtain clear and transparent casting solution;
(2) filtering the membrane casting solution by using a stainless steel filter screen, and performing vacuum defoaming on the filtrate to obtain a membrane casting solution for coating;
(3) coating the film casting solution on a PP non-woven fabric support layer with the inner layer being 180 microns thick by using a tubular film integrated film forming machine, and coating the PP non-woven fabric support layer with the outer layer being 400 microns thick by using a film casting solution, then immersing a film tube into a pure water coagulating bath at 15 ℃ for solidification and forming, and extracting a pore-forming agent from the solidified and formed film by using 100% ethanol at 60 ℃ to obtain a wet tubular film;
(4) and transferring the wet tubular membrane to pure water to be soaked for 2 days, then soaking the wet tubular membrane in a 30 wt% glycerol aqueous solution for 1 day, finally taking out the wet tubular membrane, and naturally airing the wet tubular membrane at room temperature to obtain a dry tubular membrane.
Example 8:
(1) weighing 34g of polyaryletherketone, adding the polyaryletherketone into 152g of PolarClean solvent, stirring at 60 ℃ until the polyaryletherketone is completely dissolved, adding 2g F-127 g of myristic acid, and continuously stirring at 60 ℃ for 6 hours to obtain a clear and transparent casting solution;
(2) filtering the membrane casting solution by using a stainless steel filter screen, and performing vacuum defoaming on the filtrate to obtain a membrane casting solution for coating;
(3) coating the film casting solution on a PET non-woven fabric support layer with the inner layer being 140 microns thick by using a tubular film integrated film forming machine, and coating the PET non-woven fabric support layer with the outer layer being 200 microns thick by using a film tube, then immersing the film tube into a pure water coagulating bath at 15 ℃ for solidification and forming, and extracting a pore-forming agent from the solidified and formed film by using a 50% ethanol water solution at 60 ℃ to obtain a wet tubular film;
(4) and transferring the wet tubular membrane to pure water to be soaked for 2 days, then soaking the wet tubular membrane in a 30 wt% glycerol aqueous solution for 1 day, finally taking out the wet tubular membrane, and naturally airing the wet tubular membrane at room temperature to obtain a dry tubular membrane.
Example 9:
a tubular film was produced in accordance with example 8, wherein the film tube was immersed in a pure water coagulation bath at 25 ℃ to be cured and formed without changing the other conditions.
Example 10:
(1) weighing 34g of polyaryletherketone, adding the polyaryletherketone into 152g of PolarClean solvent, stirring at 60 ℃ until the polyaryletherketone is completely dissolved, adding 2g F-127 g of palmitic acid, and continuously stirring at 70 ℃ for 6 hours to obtain a clear and transparent casting solution;
(2) filtering the membrane casting solution by using a stainless steel filter screen, and performing vacuum defoaming on the filtrate to obtain a membrane casting solution for coating;
(3) coating the film casting solution on a PP non-woven fabric support layer with the inner layer being 120 microns thick by using a tubular film integrated film forming machine, and coating the PP non-woven fabric support layer with the outer layer being 250 microns thick by using a film casting solution, then immersing a film tube into a pure water coagulating bath at 25 ℃ for solidification and forming, and extracting a pore-forming agent from the solidified and formed film by using a 90% ethanol water solution at 60 ℃ to obtain a wet tubular film;
(4) and transferring the wet tubular membrane to pure water to be soaked for 2 days, then soaking the wet tubular membrane in a 30 wt% glycerol aqueous solution for 1 day, finally taking out the wet tubular membrane, and naturally airing the wet tubular membrane at room temperature to obtain a dry tubular membrane.
Example 11:
(1) weighing 36g of polyaryletherketone, adding the polyaryletherketone into 146g of PolarClean solvent, stirring at 60 ℃ until the polyaryletherketone is completely dissolved, adding 12g F-108 and 6g of octadecanol, and continuously stirring at 65 ℃ for 6 hours to obtain a clear and transparent casting solution;
(2) filtering the membrane casting solution by using a stainless steel filter screen, and performing vacuum defoaming on the filtrate to obtain a membrane casting solution for coating;
(3) coating the film casting solution on a PET non-woven fabric support layer with the thickness of 125 microns on the inner layer by using a tubular film integrated film forming machine, and then soaking a film tube into a pure water coagulating bath at 25 ℃ for solidification and forming, and extracting a pore-forming agent from the solidified and formed film by using 80% ethanol water solution at 60 ℃ to obtain a wet tubular film;
(4) and transferring the wet tubular membrane to pure water to be soaked for 2 days, then soaking the wet tubular membrane in a 30 wt% glycerol aqueous solution for 1 day, finally taking out the wet tubular membrane, and naturally airing the wet tubular membrane at room temperature to obtain a dry tubular membrane.
Example 12:
(1) weighing 36g of polyaryletherketone, adding the polyaryletherketone into 150g of PolarClean solvent, stirring at 60 ℃ until the polyaryletherketone is completely dissolved, adding 4g F-127 g of octadecanol and 10g of octadecanol, and continuously stirring at 65 ℃ for 6 hours to obtain a clear and transparent casting solution;
(2) filtering the membrane casting solution by using a stainless steel filter screen, and performing vacuum defoaming on the filtrate to obtain a membrane casting solution for coating;
(3) coating the film casting solution on a PET non-woven fabric support layer with the inner layer being 140 microns thick by using a tubular film integrated film forming machine, and coating the PET non-woven fabric support layer with the outer layer being 200 microns thick by using a film tube, then immersing the film tube into a pure water coagulating bath at 24 ℃ for solidification and forming, and extracting a pore-forming agent from the solidified and formed film by using 80% ethanol water solution at 60 ℃ to obtain a wet tubular film;
(4) and transferring the wet tubular membrane to pure water to be soaked for 2 days, then soaking the wet tubular membrane in a 30 wt% glycerol aqueous solution for 1 day, finally taking out the wet tubular membrane, and naturally airing the wet tubular membrane at room temperature to obtain a dry tubular membrane.
Example 13:
(1) weighing 36g of polyaryletherketone, adding the polyaryletherketone into 148g of PolarClean solvent, stirring at 60 ℃ until the polyaryletherketone is completely dissolved, adding 2g F-108 and 14g of octadecanol, and continuously stirring at 65 ℃ for 6 hours to obtain a clear and transparent casting solution;
(2) filtering the membrane casting solution by using a stainless steel filter screen, and performing vacuum defoaming on the filtrate to obtain a membrane casting solution for coating;
(3) coating the film casting solution on a PP non-woven fabric support layer with the inner layer being 120 microns thick by using a tubular film integrated film forming machine, and coating the PP non-woven fabric support layer with the outer layer being 400 microns thick by using a film casting solution, then immersing a film tube into a pure water coagulating bath at 25 ℃ for solidification and forming, and extracting a pore-forming agent from the solidified and formed film by using 70% ethanol water solution at 60 ℃ to obtain a wet tubular film;
(4) and transferring the wet tubular membrane to pure water to be soaked for 2 days, then soaking the wet tubular membrane in a 30 wt% glycerol aqueous solution for 1 day, finally taking out the wet tubular membrane, and naturally airing the wet tubular membrane at room temperature to obtain a dry tubular membrane.
Example 14:
(1) weighing 36g of polyaryletherketone, adding the polyaryletherketone into 148g of PolarClean solvent, stirring at 60 ℃ until the polyaryletherketone is completely dissolved, adding 10g F-127 g of octadecanol, and continuously stirring at 65 ℃ for 6 hours to obtain a clear and transparent casting solution;
(2) filtering the membrane casting solution by using a stainless steel filter screen, and performing vacuum defoaming on the filtrate to obtain a membrane casting solution for coating;
(3) coating the film casting solution on a PET non-woven fabric support layer with the thickness of 125 microns on the inner layer by using a tubular film integrated film forming machine, and then soaking a film tube into a pure water coagulating bath at 25 ℃ for solidification and forming, and extracting a pore-forming agent from the solidified and formed film by using 60% ethanol water solution at 60 ℃ to obtain a wet tubular film;
(4) and transferring the wet tubular membrane to pure water to be soaked for 2 days, then soaking the wet tubular membrane in a 30 wt% glycerol aqueous solution for 1 day, finally taking out the wet tubular membrane, and naturally airing the wet tubular membrane at room temperature to obtain a dry tubular membrane.
The pure water flux of the membrane was measured in the above examples at a temperature of 25 ℃ and a pressure of 0.1MPa, and the average pore diameter was measured by a bubble point method pore size analyzer using ethanol as a wetting liquid and is shown in FIG. 1.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (10)
1. A method for preparing a polyaryletherketone organic tubular membrane by using a pore-foaming agent is characterized by comprising the following steps:
adding polyaryletherketone into the green solvent, stirring, adding pore-forming agent,
coating non-woven fabrics with the casting solution, dissolving out a solvent and crystallizing a pore-forming agent in a pure water solidification bath at a temperature lower than the melting point of the pore-forming agent to perform solidification and molding, transferring the solution into an extracting agent, and extracting the pore-forming agent to obtain a wet tubular membrane;
and soaking the wet tubular membrane and then airing to obtain a dry tubular membrane.
2. The method for preparing the polyaryletherketone organic tubular membrane by using the pore-foaming agent according to claim 1, wherein the membrane casting solution comprises the following components in parts by weight: 10-25 parts of polyaryletherketone, 1-10 parts of pore-foaming agent and 60-80 parts of green solvent.
3. The method for preparing the polyaryletherketone organic tubular membrane by using the pore-foaming agent as claimed in claim 1, wherein the pore-foaming agent is water-insoluble long-chain fatty alcohol or fatty acid with 10-20 carbon atoms.
4. The method for preparing polyaryletherketone organic tubular membrane by using pore-forming agent as claimed in claim 1, wherein the pore-forming agent is tetradecanol, hexadecanol, octadecanol, eicosanol, dodecanoic acid, tetradecanoic acid, palmitic acid or stearic acid.
5. The method for preparing polyaryletherketone organic tubular membrane by using pore-forming agent as claimed in claim 1, wherein hydrophilic modifier is added after adding polyaryletherketone and stirring.
6. The method for preparing polyaryletherketone organic tubular membrane with porogen of claim 1, wherein said green solvent is methyl 5-dimethylamino-2-methyl-5-oxopentanoate.
7. The method for preparing the polyaryletherketone organic tubular membrane by using the pore-forming agent as claimed in claim 1, wherein the non-woven fabric is made of PET or PP.
8. The method for preparing polyaryletherketone organic tubular membrane by using pore-forming agent according to claim 1, wherein the extracting agent is ethanol aqueous solution.
9. An organic tubular membrane is characterized in that non-woven fabrics comprising composite membrane casting liquid are subjected to dissolution of a solvent and crystallization of a pore-forming agent in a pure water coagulation bath at a temperature lower than the melting point of the pore-forming agent, and are solidified and molded.
10. The organic tubular membrane according to claim 9, wherein the casting solution comprises the following components in parts by weight: 10-25 parts of polyaryletherketone, 1-10 parts of pore-foaming agent and 60-80 parts of green solvent.
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| CN112808019A (en) * | 2020-12-24 | 2021-05-18 | 安徽普朗膜技术有限公司 | Method for preparing polyaryletherketone tubular membrane by using green solvent thermal-induced phase method |
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