CN113731187B - Method for improving desalting stability of porous ceramic membrane by constructing hydrophobic protective layer - Google Patents
Method for improving desalting stability of porous ceramic membrane by constructing hydrophobic protective layer Download PDFInfo
- Publication number
- CN113731187B CN113731187B CN202110997150.4A CN202110997150A CN113731187B CN 113731187 B CN113731187 B CN 113731187B CN 202110997150 A CN202110997150 A CN 202110997150A CN 113731187 B CN113731187 B CN 113731187B
- Authority
- CN
- China
- Prior art keywords
- ceramic membrane
- pore
- pdms
- forming agent
- hydrophobic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0093—Chemical modification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/36—Pervaporation; Membrane distillation; Liquid permeation
- B01D61/364—Membrane distillation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0081—After-treatment of organic or inorganic membranes
- B01D67/0088—Physical treatment with compounds, e.g. swelling, coating or impregnation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/15—Use of additives
- B01D2323/18—Pore-control agents or pore formers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/26—Spraying processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/30—Chemical resistance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/38—Hydrophobic membranes
Abstract
The invention provides a method for improving the desalting stability of a porous ceramic membrane by constructing a hydrophobic protective layer. Firstly, carrying out hydrophobic modification on the surface of a porous ceramic membrane by using a hydrophobic modifier, then spraying a pore-forming agent solution on the surface of the porous ceramic membrane, and drying to crystallize the porous ceramic membrane into pore-forming agent particles; then, diluting PDMS with organic matter, and adding a certain proportion of hydrophobic nano silicon dioxide particles; will contain SiO2The PDMS solution is evenly sprayed on the surface of the ceramic membrane which is fully distributed with the pore-forming agent particles and is solidified; and soaking the cured ceramic membrane into water to dissolve the pore-forming agent particles, and drying to obtain the porous ceramic membrane with the surface provided with the porous PDMS protective layer. The obtained ceramic membrane has the advantages of good air permeability, high hydrophobic stability, stable chemical property, low cost, simple method and the like, and when the ceramic membrane is applied to membrane distillation desalination, the desalination rate is kept at 100 percent and the continuous experimental operation can be carried out for more than 300 hours.
Description
Technical Field
The invention relates to the technical field of membrane distillation desalination, and relates to a method for improving desalination stability by constructing a porous PDMS hydrophobic protective layer on the surface of a ceramic membrane.
Background
Fresh water resources on the earth are scarce, water resources which can be directly utilized by human only account for 0.3 percent of the total amount of the fresh water, and the demand of the human on the fresh water resources is huge. Uneven water resource distribution, unreasonable exploitation and pollution waste, so that the fresh water resource is in greater shortage. The seawater desalination can improve the problem of fresh water shortage to a certain extent, and plays an important role in relieving global crisis of fresh water resources.
The membrane distillation is a technology which has low transmembrane pressure, low energy consumption, simple operation, stable operation and capability of theoretically obtaining 100 percent of desalination rate, and has wide potential application prospect in the field of seawater desalination. The porous ceramic membrane has high mechanical strength and stable chemical performance, and can be used as a membrane component for membrane distillation. Because of their intrinsic hydrophilicity, inorganic ceramic membranes need to be hydrophobized. The current commonly used hydrophobization treatment method is to perform post-grafting modification on a ceramic membrane by utilizing Fluorosilane (FAS), connect hydrophobic fluorocarbon groups to the surface of the ceramic, and reduce the concentration of hydrophilic hydroxyl groups on the surface of the ceramic, thereby obtaining the hydrophobic ceramic membrane. After the ceramic membrane subjected to hydrophobic treatment is soaked in a saline solution for a long time, hydrophobic groups are easy to fall off from the surface of the ceramic membrane, so that the hydrophobicity of the ceramic membrane is lost, and the saline water is easy to wet and permeate the ceramic membrane in the desalting process, so that the desalting rate is reduced, and the long-time use requirement cannot be met, therefore, the improvement of the hydrophobic stability of the inorganic ceramic membrane is of great importance.
The hydrophobic protective layer is constructed on the surface of the hydrophobic ceramic membrane to prevent the brine wetting phenomenon of the ceramic membrane in the long-time desalting operation process, so that the hydrophobic stability of the ceramic membrane is improved, and the desalting stability of the porous ceramic membrane is further improved. Polydimethylsiloxane (PDMS) has good chemical stability, low surface energy, convenient use and processing and low price, and is widely applied to the preparation of hydrophobic materials. The literature reports that a hydrophobic surface is prepared by PDMS, and the hydrophobic surface with large water contact angle, good stability, scratch resistance, friction resistance, water impact resistance and strong bonding force with a substrate can be obtained by doping nano particles or constructing a micro-nano structure. However, PDMS forms a dense polymer after being cured, and if it is directly coated on the surface of the porous ceramic to serve as a hydrophobic layer, the porous structure of the ceramic is blocked, so that steam cannot pass through the membrane material, and thus the PDMS cannot be used for membrane distillation desalination. Therefore, the invention adopts an innovative method to construct the porous PDMS hydrophobic protection layer on the surface of the porous ceramic membrane, thereby improving the stability of the porous ceramic membrane in desalination.
Disclosure of Invention
The invention aims to provide a method for improving the desalination stability of a ceramic membrane by constructing a porous PDMS hydrophobic protective layer; the method obviously improves the membrane distillation desalination stability of the ceramic membrane, and has low cost, simple method and universality.
The invention is carried out according to the following steps:
a method for constructing a porous PDMS hydrophobic protection layer with good stability on the surface of a porous ceramic membrane for desalination is characterized by comprising the following steps:
(1) carrying out post-grafting modification on the surface of the porous ceramic membrane by using a hydrophobic modifier and carrying out condensation reaction to obtain a ceramic membrane A;
(2) spraying a pore-forming agent solution on the surface of the ceramic membrane A obtained in the step (1), and uniformly distributing the pore-forming agent on the surface of the ceramic membrane A after the pore-forming agent is crystallized and separated out under certain conditions to obtain a ceramic membrane B;
(3) PDMS is dissolved in organic solvent and diluted, and then SiO with a certain proportion is added2Particles are uniformly dispersed to obtain the product containing SiO2The PDMS mixture of (1).
(4) Uniformly spraying the mixed solution obtained in the step (3) on the surface of the ceramic membrane B obtained in the step (2) to obtain a ceramic membrane C;
(5) heating and curing the ceramic membrane C obtained in the step (4) to obtain a ceramic membrane D;
(6) and (5) dissolving the pore-forming agent particles contained in the ceramic membrane D obtained in the step (5), and drying to obtain the hydrophobic porous ceramic membrane with the porous PDMS protective layer.
In the step (1), the hydrophobic modifier is a tridecafluorooctyltriethoxysilane-ethanol solution with the mass fraction of 15%, the modification time is 24 hours, and the condensation reaction conditions are 100 ℃ and 24 hours.
In the step (1), the porous ceramic membrane is a cordierite porous ceramic membrane, and the aperture is 0.1-0.5 μm.
In the step (2), the pore-forming agent solution is a sodium chloride solution with the mass percentage concentration of 20%.
The spraying is realized by an air pressure spray gun with the caliber of a nozzle being 0.3mm, the spraying distance is 20cm, and the spraying time is 15 s; the crystallization environment of the pore-forming agent is in a baking oven at 50 ℃.
In the step (3), the PDMS is Sylgard 184; the organic solvent is n-hexane and is diluted into PDMS diluent with the mass percentage concentration of 10%.
The SiO2Is hydrophobic gas phase type nano SiO2The particle size is 7-40nm, and the addition ratio is SiO2The mass ratio of PDMS is 0.30.
In the step (4), the spraying is realized by an air pressure spray gun with the caliber of a nozzle being 0.3mm, the spraying distance is 10cm, and the spraying time is 15 s.
In the step (5), the heating curing temperature is 80 ℃, and the time is 2 hours.
In the step (6), the condition for dissolving the pore-forming agent particles is that the particles are soaked in deionized water, and water is replaced for three times in the soaking period; the drying temperature is 50 ℃, and the drying time is 24 hours.
Compared with the prior art, the invention has the technical advantages that:
the surface of the hydrophobic protective layer of porous PDMS obtained by the method has a water contact angle of 155 degrees, and has stable hydrophobicity and acid and alkali corrosion resistance; has obvious hydrophobic protection effect on the porous ceramic membrane, and obviously improves the stability of ceramic membrane desalination.
The equipment used by the method of the invention is only the air pressure spray gun and the drying box, other expensive and special equipment is not needed, the manufacturing process is simple, and the cost is lower;
the method has strong operability, and the content of the pore-forming agent can be adjusted by adjusting the spraying time when the pore-forming agent is sprayed, so that the membranes with different gas permeation fluxes are prepared.
The method has universality. The pore-forming agent is inorganic salt which is easy to dissolve in water, and can be selected in various ways; and the method is also applicable to porous ceramic membrane substrates made of different materials.
Drawings
FIG. 1A ceramic film N before and after the formation of a protective layer2The permeate flux.
FIG. 2 shows the surface morphology of the porous ceramic film, the dense PDMS and the porous PDMS without the protective layer.
FIG. 3 shows the contact angles of the ceramic films with water before and after the formation of the protective layer in FIGS. (a) and (b).
FIG. 4 shows that (a) and (b) show ceramic film scraping test and acid and alkali corrosion test after the protective layer is constructed.
FIG. 5 Membrane distillation desalination stability test.
Detailed Description
The following provides a clear and complete description of the embodiments of the present invention, and also provides a partial characterization result.
Example 1
Grafting and modifying the cordierite porous ceramic membrane with the aperture of 0.1-0.5 mu m in a tridecafluorooctyltriethoxysilane-ethanol solution with the mass fraction of 15% for 24h, then placing the cordierite porous ceramic membrane in a drying oven with the temperature of 100 ℃ for condensation reaction, and taking out the cordierite porous ceramic membrane after 24 h. Preparing 20% NaCl solution by mass fraction, loading into an air pressure spray gun with the nozzle caliber of 0.3mm, spraying for 15s at a distance of 20cm from the ceramic membrane substrate, and then placing in a 50 ℃ oven to crystallize and separate NaCl. Weighing Sylgard184-PDMS according to a proportion, and adding n-hexane to dilute into a diluent with the mass fraction of 10%; SiO with the mass ratio of 0.30 to PDMS is added2Mixing uniformly; and (3) loading the mixed solution into an air pressure spray gun with the caliber of a nozzle being 0.3mm, and spraying for 15s at a distance of 10cm from the ceramic membrane substrate. And then, putting the ceramic membrane into an oven with the temperature of 80 ℃ for curing for 2 hours, and then putting the ceramic membrane into deionized water for soaking, wherein water is changed for three times. Finally, the ceramic membrane is dried for 24 hours at 50 ℃, excessive moisture is removed, and then nitrogen (N) is carried out2) Permeation flux test and surface topography test. N of the prepared hydrophobic ceramic membrane at the pressure difference of 100kPa on two sides of the membrane2The air flow is 3.172 x 104L/m2h. Observing the surface of the prepared hydrophobic ceramic membrane under a scanning electron microscope, wherein PDMS on the surface can be seen to have a porous structure.
Example 2
Grafting and modifying the cordierite porous ceramic membrane with the aperture of 0.1-0.5 mu m in a tridecafluorooctyltriethoxysilane-ethanol solution with the mass fraction of 15% for 24h, then placing the cordierite porous ceramic membrane in a drying oven with the temperature of 100 ℃ for condensation reaction, and taking out the cordierite porous ceramic membrane after 24 h. Preparing 20% NaCl solution by mass fraction, loading into an air pressure spray gun with the nozzle caliber of 0.3mm, spraying for 15s at a distance of 20cm from the ceramic membrane substrate, and then placing in a 50 ℃ oven to crystallize and separate NaCl. Weighing Sylgard184-PDMS according to a proportion, and adding n-hexane to dilute into a diluent with the mass fraction of 10%; adding SiO2 with the mass ratio of the added material to the PDMS being 0.30, and mixing evenly; and (3) loading the mixed solution into an air pressure spray gun with the caliber of a nozzle being 0.3mm, and spraying for 15s at a distance of 10cm from the ceramic membrane substrate. And then, putting the ceramic membrane into an oven with the temperature of 80 ℃ for curing for 2 hours, and then putting the ceramic membrane into deionized water for soaking, wherein water is changed for three times. And finally, drying the ceramic membrane for 24 hours at 50 ℃, removing redundant moisture, and then carrying out scratch resistance and chemical corrosion resistance tests. After 35 cycles of 400-mesh sand paper, 200g of load and 20cm of scraping distance, the prepared hydrophobic ceramic membrane has good surface hydrophobicity, and the contact angle of the hydrophobic ceramic membrane to water is 135.8 degrees; after the prepared hydrophobic ceramic membrane is soaked in strong acid and strong base solutions for 120 hours, the contact angles of the hydrophobic ceramic membrane to water are respectively reduced to 138.6 degrees and 124.8 degrees, and the hydrophobic ceramic membrane has good acid and alkali corrosion resistance.
Example 3
Grafting and modifying the cordierite porous ceramic membrane with the aperture of 0.1-0.5 mu m in a tridecafluorooctyltriethoxysilane-ethanol solution with the mass fraction of 15% for 24h, then placing the cordierite porous ceramic membrane in a drying oven with the temperature of 100 ℃ for condensation reaction, and taking out the cordierite porous ceramic membrane after 24 h. Preparing a NaCl solution with the mass fraction of 20%, loading the NaCl solution into an air pressure spray gun with the caliber of a nozzle of 0.3mm, spraying the NaCl solution 20cm away from the ceramic membrane substrate for 15s, and then placing the ceramic membrane substrate in a baking oven at 50 ℃ to crystallize and separate out NaCl. Weighing Sylgard184-PDMS according to a proportion, and adding n-hexane to dilute into a diluent with the mass fraction of 10%; adding SiO2 with the mass ratio to PDMS being 0.30, and mixing evenly; and (3) loading the mixed solution into an air pressure spray gun with the caliber of a nozzle being 0.3mm, and spraying for 15s at a distance of 10cm from the ceramic membrane substrate. And then, putting the ceramic membrane into an oven with the temperature of 80 ℃ for curing for 2 hours, and then putting the ceramic membrane into deionized water for soaking, wherein water is changed for three times. And finally, drying the ceramic membrane for 24 hours at 50 ℃ to remove excessive water, and then carrying out a membrane distillation desalination experiment. The desalting rate of the prepared hydrophobic ceramic membrane is 100 percent, and the desalting rate is at 3.5 percent of NaCl and the temperature of feed liquid is 80 percentThe average flux is 8.16Kg/m under the conditions of the temperature and the pumping speed of 300mL/min2h; after continuous desalination for 200h under the condition, the desalination experiment is continuously carried out for 30h by changing the experiment conditions such as different temperatures, concentrations, flow rates and the like, the more stable water flux can still be kept for the subsequent 70h, and the accumulated stable desalination time can reach 300 h.
FIG. 1 shows the ceramic films N before and after the formation of the protective layer2The permeation flux graph shows that the gas permeability of the ceramic membrane is reduced after the porous PDMS protective layer is built on the surface, but the gas permeability of the ceramic membrane is also proved to be porous rather than completely compact, which indicates that the pore-forming of PDMS by NaCl is successful. FIG. 2 is a surface morphology of a ceramic membrane observed under a scanning electron microscope, and FIG. 2a is a porous ceramic membrane without a protective layer; FIG. 2b shows the ceramic film sprayed with PDMS only (without pore-forming agent), and it can be seen that the porous structure on the surface of the ceramic film is completely covered and the surface is completely dense; fig. 2c shows the surface morphology of the ceramic film after removing the pore-forming agent from the PDMS, and it can be seen that the surface of the ceramic film is covered by a porous PDMS layer. FIG. 3 is a graph showing the change of the contact angle of the porous ceramic membrane to water before and after modification, and it can be seen from the graph that the ceramic membrane before modification is completely hydrophilic, the contact angle to water is 0 degrees, the contact angle to water of the modified ceramic membrane is 155.8 degrees, and the hydrophilic surface is changed into a superhydrophobic surface. FIG. 4 shows the change of water contact angle of the porous ceramic membrane after the construction of the protective layer and the scratch test and the acid-base corrosion test. As can be seen from fig. 4a, after 35 scraping cycles, the contact angle of the surface of the ceramic film to water is 135.8 °, and good hydrophobicity is still maintained; as shown in fig. 4b, after the ceramic film with the protective layer is soaked in strong acid and strong alkali solutions for 120 hours, the contact angles of the ceramic film with the protective layer to water are respectively reduced to 138.6 ° and 124.8 °, so that the ceramic film has good acid and alkali corrosion resistance. FIG. 5 shows the results of membrane distillation desalination stability tests of the hydrophobic porous ceramic after the protective layer is constructed, and after the test is stably operated for 200 hours under the original experimental conditions of 3.5% NaCl, the feed liquid temperature of 80 ℃ and the pumping rate of 300mL/min, the desalination experiments are continuously carried out for 30 hours by changing the experimental conditions of different temperatures, concentrations, flow rates and the like. FIG. 5 (I) shows that 3.5% NaCl, pumping rate 300mL/min, and feed liquid temperature are: a.70 ℃, b.60 ℃ and c.50 ℃; FIG. 5 (II) shows the feed liquid temperature 80The pumping speed is 300mL/min, and the NaCl concentration is respectively as follows: a.0.0%, b.7.0%, c.10.5%; FIG. 5 (III) shows the feed temperature of 80 ℃, 3.5% NaCl, and the pumping rate, respectively: after the original desalting experiment conditions are recovered, the prepared hydrophobic porous ceramic membrane can still keep relatively stable water flux, and the average flux is 8.10Kg/m2h, the desalination rate is always kept at 100%, and the accumulative stable desalination operation is more than 300 h.
Claims (2)
1. A method for constructing a stable porous PDMS hydrophobic protection layer on the surface of a porous ceramic membrane for desalination is characterized by comprising the following steps:
(1) carrying out post-grafting modification on the surface of the porous ceramic membrane by using a hydrophobic modifier and carrying out condensation reaction to obtain a ceramic membrane A;
(2) spraying a pore-forming agent solution on the surface of the ceramic membrane A obtained in the step (1), and uniformly distributing the pore-forming agent on the surface of the ceramic membrane A after the pore-forming agent is crystallized and separated out under certain conditions to obtain a ceramic membrane B;
(3) uniformly mixing the prepolymer of PDMS and a curing agent in proportion, dissolving the mixture in an organic solvent, and adding SiO in a certain proportion2Particles are uniformly dispersed to obtain the product containing SiO2The PDMS mixed solution;
(4) uniformly spraying the mixed solution obtained in the step (3) on the surface of the ceramic membrane B obtained in the step (2) to obtain a ceramic membrane C;
(5) heating and curing the ceramic membrane C obtained in the step (4) to obtain a ceramic membrane D;
(6) dissolving the pore-forming agent particles contained in the ceramic membrane D obtained in the step (5), and drying to obtain a porous PDMS hydrophobic protective layer;
in the step (1), the hydrophobic modifier is a tridecafluorooctyltriethoxysilane-ethanol solution with the mass fraction of 15 percent, the modification time is 24 hours, and the condensation reaction conditions are 100 ℃ and 24 hours;
in the step (2), the pore-forming agent solution is a sodium chloride solution with the mass percentage concentration of 20%; the pore-forming agent; the spraying is realized by an air pressure spray gun with the caliber of a nozzle being 0.3mm, the spraying distance is 20cm, and the spraying time is 15 s; the pore-forming agent crystallization environment is a 50 ℃ oven;
in the step (3), the PDMS is Sylgard184, the organic solvent is n-hexane, and the PDMS is prepared into a n-hexane solution with a mass percentage concentration of 10%; the SiO2Is hydrophobic gas phase type nano SiO2The particle size is 7-40nm, and the addition ratio is SiO2The mass ratio of PDMS is 0.30;
in the step (4), the spraying is realized by an air pressure spray gun with the caliber of a nozzle being 0.3mm, the spraying distance is 10cm, and the spraying time is 15 s;
in the step (5), the heating curing temperature is 80 ℃, and the time is 2 hours;
in the step (6), the condition for dissolving the pore-forming agent particles is that the particles are soaked in deionized water, and water is replaced for three times in the process; the drying temperature is 50 ℃, and the drying time is 24 hours.
2. The method according to claim 1, wherein in step (1), the porous ceramic membrane is a cordierite porous ceramic membrane with a pore size of 0.1-0.5 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110997150.4A CN113731187B (en) | 2021-08-27 | 2021-08-27 | Method for improving desalting stability of porous ceramic membrane by constructing hydrophobic protective layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110997150.4A CN113731187B (en) | 2021-08-27 | 2021-08-27 | Method for improving desalting stability of porous ceramic membrane by constructing hydrophobic protective layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113731187A CN113731187A (en) | 2021-12-03 |
| CN113731187B true CN113731187B (en) | 2022-06-14 |
Family
ID=78733501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110997150.4A Active CN113731187B (en) | 2021-08-27 | 2021-08-27 | Method for improving desalting stability of porous ceramic membrane by constructing hydrophobic protective layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113731187B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004076041A1 (en) * | 2003-02-26 | 2004-09-10 | Hermsdorfer Institut Für Technische Keramik E.V. | Ceramic nanofiltration membrane for use in organic solvents and method for the production thereof |
| CN106669440A (en) * | 2017-01-03 | 2017-05-17 | 中国石油天然气股份有限公司 | Modification method of ceramic membrane and modified ceramic membrane |
| CN108587447A (en) * | 2018-03-14 | 2018-09-28 | 湖北大学 | A kind of preparation method for the durability transparent hydrophobic coating adapting to a variety of substrates |
| CN108947572A (en) * | 2018-09-25 | 2018-12-07 | 太仓弘潞新材料有限公司 | A kind of preparation method of the porous ceramic film of carbon fluorin radical modification |
| CN109012199A (en) * | 2018-09-14 | 2018-12-18 | 天津工业大学 | A kind of super-hydrophobic film of resist wet and preparation method thereof |
| CN113019134A (en) * | 2021-02-27 | 2021-06-25 | 北京工业大学 | Method for improving hydrophobic stability of porous ceramic membrane for desalination |
| CN113019158A (en) * | 2021-03-03 | 2021-06-25 | 北京工业大学 | Method for preparing porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing and molding blast furnace slag as main raw material |
-
2021
- 2021-08-27 CN CN202110997150.4A patent/CN113731187B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004076041A1 (en) * | 2003-02-26 | 2004-09-10 | Hermsdorfer Institut Für Technische Keramik E.V. | Ceramic nanofiltration membrane for use in organic solvents and method for the production thereof |
| CN106669440A (en) * | 2017-01-03 | 2017-05-17 | 中国石油天然气股份有限公司 | Modification method of ceramic membrane and modified ceramic membrane |
| CN108587447A (en) * | 2018-03-14 | 2018-09-28 | 湖北大学 | A kind of preparation method for the durability transparent hydrophobic coating adapting to a variety of substrates |
| CN109012199A (en) * | 2018-09-14 | 2018-12-18 | 天津工业大学 | A kind of super-hydrophobic film of resist wet and preparation method thereof |
| CN108947572A (en) * | 2018-09-25 | 2018-12-07 | 太仓弘潞新材料有限公司 | A kind of preparation method of the porous ceramic film of carbon fluorin radical modification |
| CN113019134A (en) * | 2021-02-27 | 2021-06-25 | 北京工业大学 | Method for improving hydrophobic stability of porous ceramic membrane for desalination |
| CN113019158A (en) * | 2021-03-03 | 2021-06-25 | 北京工业大学 | Method for preparing porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing and molding blast furnace slag as main raw material |
Non-Patent Citations (4)
| Title |
|---|
| Effects of polydimethylsiloxane (PDMS) molecular weight on performance of PDMS/ceramic composite membranes;Wang Wei等;《Journal of Membrane Science》;20110408;第375卷;全文 * |
| 有机硅烷交联PDMS/陶瓷复合膜的制备及渗透汽化汽油脱硫性能;徐荣等;《化工进展》;20161103;第35卷(第10期);全文 * |
| 膜蒸馏用多孔陶瓷膜的疏水改性;王俊伟等;《现代技术陶瓷》;20200615;第41卷(第3期);全文 * |
| 陶瓷膜超疏水改性及其膜蒸馏性能研究;陈翰林等;《水处理技术》;20180310;第44卷(第3期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113731187A (en) | 2021-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Huang et al. | A simple coating method to prepare superhydrophobic layers on ceramic alumina for vacuum membrane distillation | |
| Sun et al. | Surface hydrophilic modification of PVDF membranes based on tannin and zwitterionic substance towards effective oil-in-water emulsion separation | |
| Chew et al. | Superoleophobic surface modification for robust membrane distillation performance | |
| Wang et al. | Robust superhydrophobic mesh coated by PANI/TiO2 nanoclusters for oil/water separation with high flux, self-cleaning, photodegradation and anti-corrosion | |
| Wang et al. | Dopamine incorporating forward osmosis membranes with enhanced selectivity and antifouling properties | |
| Ni et al. | Omniphobic membranes for distillation: Opportunities and challenges | |
| Sethunga et al. | Optimization of hydrophobic modification parameters of microporous polyvinylidene fluoride hollow-fiber membrane for biogas recovery from anaerobic membrane bioreactor effluent | |
| Su et al. | Fouling resistance improvement with a new superhydrophobic electrospun PVDF membrane for seawater desalination | |
| US20130105395A1 (en) | Nanostructured membranes for engineered osmosis applications | |
| Koh et al. | Preparation of an omniphobic nanofiber membrane by the self-assembly of hydrophobic nanoparticles for membrane distillation | |
| Tang et al. | Microstructure design and construction of anti-wetting and anti-fouling multifunctional Janus membrane for robust membrane distillation | |
| US10940438B2 (en) | Omniphobic membranes and application thereof | |
| Pardeshi et al. | Synthesis, characterization and application of novel high flux FO membrane by layer-by-layer self-assembled polyelectrolyte | |
| CN108176255B (en) | Polyvinylidene fluoride-titanium dioxide hybrid membrane and preparation method and application thereof | |
| Zheng et al. | Hierarchically-structured superhydrophobic POSS/PVDF composite membrane for anti-fouling and anti-wetting membrane distillation | |
| Li et al. | Laccase-catalyzed homo-polymer of GAL and cross-linking with PEI to enhance hydrophilicity and antifouling property of PTFE flat membrane | |
| CN104837934A (en) | Method of making superhydrophobic/superoleophilic paints, epoxies, and composites | |
| CN108771983B (en) | Multilayer through-hole high-permeability polymer microfiltration membrane and preparation method thereof | |
| CN101279211A (en) | Preparation of polyvinylidene fluoride dewatering microporous film | |
| Lee et al. | Surface modification of polyvinylidene fluoride membrane for enhanced wetting resistance | |
| Mohamed et al. | Fabrication of durable superhydrophobic/oleophilic cotton fabric for highly efficient oil/water separation | |
| Wang et al. | Janus polymer membranes prepared by single-side polydopamine deposition for dye adsorption and fine bubble aeration | |
| Baniasadi et al. | Enhanced performance and fouling resistance of cellulose acetate forward osmosis membrane with the spatial distribution of TiO2 and Al2O3 nanoparticles | |
| CN113731187B (en) | Method for improving desalting stability of porous ceramic membrane by constructing hydrophobic protective layer | |
| Xue et al. | Polyamide nanofilms synthesized by a sequential process of blade coating-spraying-interfacial polymerization toward reverse osmosis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |