CN103495351B - Preparation method for modified polyethylene glycol terephthalate non-woven fabric composite membrane - Google Patents
Preparation method for modified polyethylene glycol terephthalate non-woven fabric composite membrane Download PDFInfo
- Publication number
- CN103495351B CN103495351B CN201310484592.4A CN201310484592A CN103495351B CN 103495351 B CN103495351 B CN 103495351B CN 201310484592 A CN201310484592 A CN 201310484592A CN 103495351 B CN103495351 B CN 103495351B
- Authority
- CN
- China
- Prior art keywords
- preparation
- modification
- composite membrane
- membrane
- composite film
- 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
Abstract
The invention discloses a preparation method for a modified polyethylene glycol terephthalate non-woven fabric composite membrane and relates to a preparation method for parting materials and composite membrane materials in order to solve the technical problem that a modified composite membrane prepared according to an existing membrane material modification or membrane surface modification method is low in reduction rate of a water contact angle and in reduction rate of equilibrium solution absorption capacity of bovine serum albumin (BSA). The preparation method includes the steps of: 1), preparation of a casting membrane solution; 2), preparation of the modified composite membrane; 3), preparation of the modified non-woven fabric composite membrane. By the preparation method, the water contact angle of the composite membrane is lowered, the equilibrium solution absorption capacity of the BSA of the composite membrane is decreased, and membrane flux of the composite membrane is increased.
Description
Technical field
The present invention relates to the preparation method of a kind of parting material and composite film material.
Background technology
Membrane bioreactor (Membrane Bioreactor, MBR) is a kind of new wastewater treatment method membrane separation technique and traditional biological processing method are combined into, and UF membrane combines with biodegradation by it.In the application of membrane separation technique, membrane material serves vital effect.At present, membrane pollution problem has become the subject matter of restriction MBR application and development.Hydrophobic interaction between hydrophobic surface and hydrophobic polymer is the main cause of polluter absorption.Many institutes generally acknowledge, the raising of membrane material surface hydrophilicity can reduce the interaction that film is surperficial and retain between molecule, thus decreasing pollution material, the especially absorption of biological pollutant.Therefore, hydrophilic material masking should be selected, or modification is carried out to hydrophobic material make it have hydrophily, thus reach the object improving membrane material anti-fouling performance.Current existing membrane material to possess simultaneously good hydrophily, heat endurance, high mechanical properties, resistance to acids and bases and resistance to microbial attack often difficulty, therefore, often adopt method that is membrane material modified or membrane surface modification both at home and abroad, improve the hydrophilicity of film, to meet the different needs.
The people such as Li Jing utilize gamma-rays mutual radiation technology grafting methacrylic acid on polyether sulfone (PES) film.The contact angle of modified PES film reduces by 41% than the water contact angle of non-graft copolymer membrane, is reduced to 43 ° by 73 °.
The Liu Futong of Zhejiang University crosses high energy Electron beam pre-irradiation pvdf membrane, produces free radical on surface, then adopts dual MCU system system acrylic acid/SSS to carry out surface grafting in aqueous.When percent grafting is 25.1%, bovine serum albumin (BSA) solution adsorbance is by 96 μ g/cm
2drop to 45 μ g/cm
2(reducing by 53%).When percent grafting is 25.2%, water contact angle is only 62 °, and the water contact angle of unmodified membrane is 90 °, and water contact angle reduces by 31.1%.
Therefore, it is low to there is water contact angle reduced rate in modification composite membrane prepared by existing method that is membrane material modified or membrane surface modification, and BSA solution equilibria adsorbance reduced rate is low, the technical problem that membrane flux increase rate is low.
Summary of the invention
The present invention is that will to solve the water contact angle reduced rate that modification composite membrane prepared by existing method that is membrane material modified or membrane surface modification exists low, the technical problem that bovine serum albumin (BSA) solution equilibria adsorbance reduced rate is low, thus the preparation method providing a kind of modification PETG nonwoven fabrics composite film.
The preparation method of a kind of modification PETG nonwoven fabrics composite film of the present invention carries out according to the following steps:
One, the preparation of casting solution: with 2-acrylamide-2-methyl propane sulfonic for hydrophilic monomer, add crosslinking agent N, N '-methylene-bisacrylamide and light trigger KG, prepare casting solution; Wherein, the mass ratio of 2-acrylamide-2-methyl propane sulfonic, N, N '-methylene-bisacrylamide and KG is 5 ~ 20:1:1;
Two, non-woven fabrics being soaked in mass percentage is 2 ~ 5h in the Macrogol 600 solution of 1.2% ~ 3.6%, casting solution immersion 30 ~ 60min prepared by step one is put into after taking-up, then being positioned over power is carry out irradiation under 1kW uviol lamp, obtained modification composite membrane;
Three, after being placed on by modification composite membrane obtained for step one and heat-treating 1 ~ 2h in 160 ~ 180 DEG C of drying boxes, be soaked in swelling 12 ~ 24h in deionized water, finally dry 2 ~ 4h in 100 ~ 120 DEG C of drying boxes, obtains modification nonwoven cloth composite membrane;
Wherein, the non-woven fabrics described in step 2 is PETG non-woven fabrics.
The present invention includes following beneficial effect:
1, the present invention utilizes 2-acrylamide-2-methyl propane sulfonic (AMPS) as hydrophilic monomer, and being polymerized under ultraviolet irradiation becomes containing hydroxyl, amide groups and sulfonic polymer, and technique is simple, controllability is strong, easy and simple to handle, the composite membrane good mechanical property of preparation, membrane flux is high.The method can reduce the water contact angle of composite membrane, improves the hydrophily of film, reduces fouling membrane, reduces bovine serum albumin (BSA) solution equilibria adsorbance.
2, the present invention selects cheapness, resistance to acids and bases, the non-woven fabrics that anticorrosive, chemical stability is high as basal lamina material, carry out hydrophilically modified to nonwoven surface, introduce hydrophilic radical, such as :-COOH ,-OH etc., contribute to improving its surface wettability and stain resistance.
3, the present invention utilizes polyethylene glycol (PEG) as pore-foaming agent, can promote the formation in hole, improve the connectedness in hole, effectively increase membrane flux in film forming procedure.Polyethylene glycol (PEG) is because having nontoxic, nonirritant, and good water-soluble, dispersed, antistatic behaviour are comparatively applicable to the modifying agent making non-woven fabrics.By polymer-coated after nonwoven surface, nonwoven surface is polished by coarse, can reduce its absorption property to protein, thus reduces fouling membrane.
Accompanying drawing explanation
Fig. 1 is the infrared absorption spectra of the modification nonwoven cloth composite membrane prepared of test two and nonwoven fabrics composite film before modified; Wherein, 1 is the infrared absorption spectra of nonwoven fabrics composite film before modified, and 2 is the infrared absorption spectra of modification nonwoven cloth composite membrane prepared by test two.
Detailed description of the invention
Detailed description of the invention one: the preparation method of a kind of modification PETG nonwoven fabrics composite film of present embodiment carries out according to the following steps:
One, the preparation of casting solution: with 2-acrylamide-2-methyl propane sulfonic for hydrophilic monomer, add crosslinking agent N, N '-methylene-bisacrylamide and light trigger KG, prepare casting solution; Wherein, the mass ratio of 2-acrylamide-2-methyl propane sulfonic, N, N '-methylene-bisacrylamide and KG is 5 ~ 20:1:1;
Two, non-woven fabrics being soaked in mass percentage is 2 ~ 5h in the Macrogol 600 solution of 1.2% ~ 3.6%, casting solution immersion 30 ~ 60min prepared by step one is put into after taking-up, then being positioned over power is carry out irradiation under 1kW uviol lamp, obtained modification composite membrane;
Three, after being placed on by modification composite membrane obtained for step one and heat-treating 1 ~ 2h in 160 ~ 180 DEG C of drying boxes, be soaked in swelling 12 ~ 24h in deionized water, finally dry 2 ~ 4h in 100 ~ 120 DEG C of drying boxes, obtains modification nonwoven cloth composite membrane;
Wherein, the non-woven fabrics described in step 2 is PETG non-woven fabrics.
Present embodiment comprises following beneficial effect:
1, present embodiment utilizes 2-acrylamide-2-methyl propane sulfonic (AMPS) as hydrophilic monomer, and being polymerized under ultraviolet irradiation becomes containing hydroxyl, amide groups and sulfonic polymer, and technique is simple, controllability is strong, easy and simple to handle, the composite membrane good mechanical property of preparation, membrane flux is high.The method can reduce the water contact angle of composite membrane, improves the hydrophily of film, reduces fouling membrane, reduces bovine serum albumin (BSA) solution equilibria adsorbance.
2, present embodiment selects cheapness, resistance to acids and bases, the non-woven fabrics that anticorrosive, chemical stability is high as basal lamina material, carry out hydrophilically modified to nonwoven surface, introduce hydrophilic radical, such as :-COOH ,-OH etc., contribute to improving its surface wettability and stain resistance.
3, present embodiment utilizes polyethylene glycol (PEG) as pore-foaming agent, can promote the formation in hole, improve the connectedness in hole, effectively increase membrane flux in film forming procedure.Polyethylene glycol (PEG) is because having nontoxic, nonirritant, and good water-soluble, dispersed, antistatic behaviour are comparatively applicable to the modifying agent making non-woven fabrics.By polymer-coated after nonwoven surface, nonwoven surface is polished by coarse, can reduce its absorption property to protein, thus reduces fouling membrane.
Detailed description of the invention two: present embodiment and detailed description of the invention one unlike: in step one, the mass ratio of 2-acrylamide-2-methyl propane sulfonic, N, N '-methylene-bisacrylamide and KG is 20:1:1.Other is identical with detailed description of the invention one.
Detailed description of the invention three: present embodiment and detailed description of the invention one or two unlike: in step 2, exposure time is 30 ~ 70min, and irradiation distance is 10 ~ 25cm.Other is identical with detailed description of the invention one or two.
Detailed description of the invention four: one of present embodiment and detailed description of the invention one to three unlike: in 160 DEG C of drying boxes, heat-treat 2h in step 3.Other is identical with one of detailed description of the invention one to three.
Detailed description of the invention five: one of present embodiment and detailed description of the invention one to four unlike: be soaked in swelling 4h in deionized water in step 3.Other is identical with one of detailed description of the invention one to four.
Detailed description of the invention six: one of present embodiment and detailed description of the invention one to five unlike: in step 3 in 120 DEG C of drying boxes dry 2h.Other is identical with one of detailed description of the invention one to five.
By following verification experimental verification beneficial effect of the present invention:
Test one: the preparation method of a kind of modification PETG nonwoven fabrics composite film of this test carries out according to the following steps:
One, the preparation of casting solution: with 2-acrylamide-2-methyl propane sulfonic for hydrophilic monomer, add crosslinking agent N, N '-methylene-bisacrylamide and light trigger KG, prepare casting solution; Wherein, the mass ratio of 2-acrylamide-2-methyl propane sulfonic, N, N '-methylene-bisacrylamide and KG is 20:1:1;
Two, non-woven fabrics being soaked in mass percentage is 2h in the Macrogol 600 solution of 3.6%, the casting solution putting into step one preparation after taking-up soaks 60min, then being positioned over power is carry out irradiation under 1kW uviol lamp, exposure time is 50min, irradiation distance is 10cm, obtained modification composite membrane;
Three, after being placed on by modification composite membrane obtained for step one and heat-treating 2h in 160 DEG C of drying boxes, be soaked in swelling 24h in deionized water, finally dry 2h in 120 DEG C of drying boxes, obtains modification nonwoven cloth composite membrane;
Wherein, the non-woven fabrics described in step 2 is PETG non-woven fabrics.
Test two: the preparation method of a kind of modification PETG nonwoven fabrics composite film of this test carries out according to the following steps:
One, the preparation of casting solution: with 2-acrylamide-2-methyl propane sulfonic for hydrophilic monomer, add crosslinking agent N, N '-methylene-bisacrylamide and light trigger KG, prepare casting solution; Wherein, the mass ratio of 2-acrylamide-2-methyl propane sulfonic, N, N '-methylene-bisacrylamide and KG is 20:1:1;
Two, non-woven fabrics being soaked in mass percentage is 2h in the Macrogol 600 solution of 3.6%, the casting solution putting into step one preparation after taking-up soaks 60min, then being positioned over power is carry out irradiation under 1kW uviol lamp, exposure time is 50min, irradiation distance is 15cm, obtained modification composite membrane;
Three, after being placed on by modification composite membrane obtained for step one and heat-treating 2h in 160 DEG C of drying boxes, be soaked in swelling 24h in deionized water, finally dry 2h in 120 DEG C of drying boxes, obtains modification nonwoven cloth composite membrane;
Wherein, the non-woven fabrics described in step one is PETG non-woven fabrics.
Measure known, the water contact angle of the modification nonwoven cloth composite membrane of this test preparation is 78.7 °, and the water contact angle of unmodified non-woven fabrics is 136.4 °, more known, the water contact angle of the modification nonwoven cloth composite membrane of this test preparation have dropped 42.3%, illustrates that hydrophily is improved.
Measure known, this test preparation bovine serum albumin (BSA) the solution equilibria adsorbance of modification nonwoven cloth composite film surface be 0.208mg/cm
2, bovine serum albumin (BSA) the solution equilibria adsorbance of unmodified nonwoven surface is 1.656mg/cm
2, known after calculating, bovine serum albumin (BSA) the solution equilibria adsorbance of modified nonwoven fabrics composite film is than reducing 87.4% before modified.
The modification nonwoven cloth composite membrane prepare this test and nonwoven fabrics composite film are before modified tested on ATR-FTIR infrared spectrometer, obtain the infrared absorption spectra of the modification nonwoven cloth composite membrane of this test preparation and nonwoven fabrics composite film before modified as indicated with 1, wherein, 1 is the infrared absorption spectra of nonwoven fabrics composite film before modified, the infrared absorption spectra of the 2 modification nonwoven cloth composite membranes prepared for test two, as seen from Figure 1,3300 ~ 3400cm
-1the absworption peak that place's existence one is wide and blunt, this is associated by hydroxyl and causes, and illustrates that modification nonwoven cloth surface has hydroxyl to exist.At 1650cm
-1and 1550cm
-1there is absworption peak in place, correspond to the infrared signature absworption peak of amide groups.At 1040cm
-1there is absworption peak in place, correspond to sulfonic acid group-SO
3the infrared signature absworption peak of H.This illustrates the load of modification nonwoven cloth composite film surface hydrophilic-OH ,-CONH
2with-SO
3h.The modification nonwoven cloth composite membrane of this test preparation is compared with nonwoven fabrics composite film before modified, and hydrophilic radical increases to some extent, is conducive to the hydrophily improving modification nonwoven cloth composite membrane.
Test three: the preparation method of a kind of modification PETG nonwoven fabrics composite film of this test carries out according to the following steps:
One, the preparation of casting solution: with 2-acrylamide-2-methyl propane sulfonic for hydrophilic monomer, add crosslinking agent N, N '-methylene-bisacrylamide and light trigger KG, prepare casting solution; Wherein, the mass ratio of 2-acrylamide-2-methyl propane sulfonic, N, N '-methylene-bisacrylamide and KG is 20:1:1;
Two, non-woven fabrics being soaked in mass percentage is 2h in the Macrogol 600 solution of 3.6%, the casting solution putting into step one preparation after taking-up soaks 60min, then being positioned over power is carry out irradiation under 1kW uviol lamp, exposure time is 50min, irradiation distance is 20cm, obtained modification composite membrane;
Three, after being placed on by modification composite membrane obtained for step one and heat-treating 2h in 160 DEG C of drying boxes, be soaked in swelling 24h in deionized water, finally dry 2h in 120 DEG C of drying boxes, obtains modification nonwoven cloth composite membrane;
Wherein, the non-woven fabrics described in step one is PETG non-woven fabrics.
Test four: the preparation method of a kind of modification PETG nonwoven fabrics composite film of this test carries out according to the following steps:
One, the preparation of casting solution: with 2-acrylamide-2-methyl propane sulfonic for hydrophilic monomer, add crosslinking agent N, N '-methylene-bisacrylamide and light trigger KG, prepare casting solution; Wherein, the mass ratio of 2-acrylamide-2-methyl propane sulfonic, N, N '-methylene-bisacrylamide and KG is 20:1:1;
Two, non-woven fabrics being soaked in mass percentage is 2h in the Macrogol 600 solution of 3.6%, the casting solution putting into step one preparation after taking-up soaks 60min, then being positioned over power is carry out irradiation under 1kW uviol lamp, exposure time is 50min, irradiation distance is 25cm, obtained modification composite membrane;
Three, after being placed on by modification composite membrane obtained for step one and heat-treating 2h in 160 DEG C of drying boxes, be soaked in swelling 24h in deionized water, finally dry 2h in 120 DEG C of drying boxes, obtains modification nonwoven cloth composite membrane;
Wherein, the non-woven fabrics described in step one is PETG non-woven fabrics.
Modification nonwoven cloth composite membrane prepared by test 1,2,3 and 4 is weighed and computational load degree and load factor, measures the membrane flux of composite membrane.The results are shown in Table 1.
Table 1
Claims (5)
1. a preparation method for modification PETG nonwoven fabrics composite film, is characterized in that the preparation method of modification PETG nonwoven fabrics composite film carries out according to the following steps:
One, the preparation of casting solution: with 2-acrylamide-2-methyl propane sulfonic for hydrophilic monomer, add crosslinking agent N, N '-methylene-bisacrylamide and light trigger KG, prepare casting solution; Wherein, the mass ratio of 2-acrylamide-2-methyl propane sulfonic, N, N '-methylene-bisacrylamide and KG is 5 ~ 20 ︰ 1 ︰ 1;
Two, non-woven fabrics being soaked in mass percentage is 2 ~ 5h in the Macrogol 600 solution of 1.2% ~ 3.6%, and put into casting solution immersion 30 ~ 60min prepared by step one after taking-up, being then positioned over power is that 1kW uviol lamp carries out irradiation, obtained modification composite membrane;
Three, after being placed on by modification composite membrane obtained for step 2 and heat-treating 1 ~ 2h in 160 ~ 180 DEG C of drying boxes, be soaked in swelling 12 ~ 24h in deionized water, finally dry 2 ~ 4h in 100 ~ 120 DEG C of drying boxes, obtains modification nonwoven cloth composite membrane;
Wherein, the non-woven fabrics described in step 2 is PETG non-woven fabrics.
2. the preparation method of a kind of modification PETG nonwoven fabrics composite film according to claim 1, it is characterized in that the mass ratio of 2-acrylamide-2-methyl propane sulfonic in step one, N, N '-methylene-bisacrylamide and KG is 20 ︰ 1 ︰ 1.
3. the preparation method of a kind of modification PETG nonwoven fabrics composite film according to claim 1, it is characterized in that in step 2, exposure time is 30 ~ 70min, irradiation distance is 10 ~ 25cm.
4. the preparation method of a kind of modification PETG nonwoven fabrics composite film according to claim 1, is characterized in that in 160 DEG C of drying boxes, heat-treating 2h before swelling treatment in step 3.
5. the preparation method of a kind of modification PETG nonwoven fabrics composite film according to claim 1, to is characterized in that in step 3 after swelling treatment dry 2h in 120 DEG C of drying boxes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310484592.4A CN103495351B (en) | 2013-10-16 | 2013-10-16 | Preparation method for modified polyethylene glycol terephthalate non-woven fabric composite membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310484592.4A CN103495351B (en) | 2013-10-16 | 2013-10-16 | Preparation method for modified polyethylene glycol terephthalate non-woven fabric composite membrane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103495351A CN103495351A (en) | 2014-01-08 |
| CN103495351B true CN103495351B (en) | 2015-05-13 |
Family
ID=49860663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310484592.4A Active CN103495351B (en) | 2013-10-16 | 2013-10-16 | Preparation method for modified polyethylene glycol terephthalate non-woven fabric composite membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103495351B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104741010B (en) * | 2015-03-12 | 2018-01-02 | 厦门大学 | A kind of composite silicone rubber membrane and preparation method and applications |
| CN105749759B (en) * | 2016-03-29 | 2018-07-03 | 浙江工业大学 | It is a kind of using non-woven fabrics as the preparation method of the cross-linking modified film of matrix |
| CN108914382A (en) * | 2018-07-27 | 2018-11-30 | 铜陵熙成塑料制品有限公司 | A kind of water suction antibacterial nonwoven cloth |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101205305A (en) * | 2007-12-05 | 2008-06-25 | 天津工业大学 | Negative electric charge polyvinylidene fluoride modified film and preparation thereof |
| US20080264867A1 (en) * | 2004-06-07 | 2008-10-30 | Nysa Membrane Technologies Inc. | Stable Composite Material Comprising Supported Porous Gels |
| CN102029079A (en) * | 2010-10-29 | 2011-04-27 | 中国科学院化学研究所 | Underwater super-oleophobic oil-water separation mesh membrane as well as preparation method and application thereof |
| CN102102295A (en) * | 2010-11-26 | 2011-06-22 | 昆明理工大学 | Ion exchange nonwoven fabric with high carboxyl content and preparation method thereof |
-
2013
- 2013-10-16 CN CN201310484592.4A patent/CN103495351B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080264867A1 (en) * | 2004-06-07 | 2008-10-30 | Nysa Membrane Technologies Inc. | Stable Composite Material Comprising Supported Porous Gels |
| CN101205305A (en) * | 2007-12-05 | 2008-06-25 | 天津工业大学 | Negative electric charge polyvinylidene fluoride modified film and preparation thereof |
| CN102029079A (en) * | 2010-10-29 | 2011-04-27 | 中国科学院化学研究所 | Underwater super-oleophobic oil-water separation mesh membrane as well as preparation method and application thereof |
| CN102102295A (en) * | 2010-11-26 | 2011-06-22 | 昆明理工大学 | Ion exchange nonwoven fabric with high carboxyl content and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103495351A (en) | 2014-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hong et al. | Nanocomposite reverse electrodialysis (RED) ion-exchange membranes for salinity gradient power generation | |
| Liu et al. | Preparation of hydrophilic and fouling resistant poly (vinylidene fluoride) hollow fiber membranes | |
| CN104117294B (en) | A kind of preparation method of hydrophilia polyvinylidene fluoride hollow fiber membrane | |
| Hong et al. | Evaluation of electrochemical properties and reverse electrodialysis performance for porous cation exchange membranes with sulfate-functionalized iron oxide | |
| Zhao et al. | Metal organic framework enhanced SPEEK/SPSF heterogeneous membrane for ion transport and energy conversion | |
| CN104437090B (en) | Reversed electrodialysis amberplex and include its reversed electrodialysis | |
| Hou et al. | Nanofibrous composite membranes (NFCMs) for mono/divalent cations separation | |
| Zhu et al. | Enhanced chemical durability of perfluorosulfonic acid membranes through incorporation of terephthalic acid as radical scavenger | |
| CN106345324B (en) | A kind of preparation method of hydridization amberplex | |
| KR101330571B1 (en) | Manufacturing method of hybride ion exchange membrane | |
| Pan et al. | Anion exchange membranes from hot-pressed electrospun QPPO–SiO2 hybrid nanofibers for acid recovery | |
| CN104868079B (en) | Method for preparing high invasive lithium ion battery diaphragm | |
| Sadeghi et al. | Enhancing proton conductivity via sub-micron structures in proton conducting membranes originating from sulfonated PVDF powder by radiation-induced grafting | |
| Zhou et al. | A novel UV-crosslinked sulphonated polysulfone cation exchange membrane with improved dimensional stability for electrodialysis | |
| CN103495351B (en) | Preparation method for modified polyethylene glycol terephthalate non-woven fabric composite membrane | |
| Zhao et al. | Modification of cation exchange membranes with conductive polyaniline for electrodialysis applications | |
| Cai et al. | Embedding phosphoric acid-doped cellulose nanofibers into sulfonated poly (ether sulfone) for proton exchange membrane | |
| CN109173737A (en) | A kind of preparation method of novel highly selective positive charged composite nanofiltration membrane | |
| Tian et al. | Preparation of PVDF anionic exchange membrane by chemical grafting of GMA onto PVDF macromolecule | |
| Ju et al. | Preparation and characterization of pH-sensitive and antifouling poly (vinylidene fluoride) microfiltration membranes blended with poly (methyl methacrylate-2-hydroxyethyl methacrylate-acrylic acid) | |
| CN104888627A (en) | Preparation method of hydrophilic polyester nonwoven composite membrane | |
| Zhao et al. | Enhanced performance of a Nafion membrane through ionomer self-organization in the casting solution | |
| Khan et al. | Preparation of diffusion dialysis membrane for acid recovery via a phase-inversion method | |
| CN107362698A (en) | A kind of preparation method and applications of durable hydrophilic property polyvinylidene fluoride film | |
| Hwang et al. | Planar orientation of hydrophilic channels by biaxial deformation of perfluorinated sulfonic acid membranes for vanadium redox flow batteries |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |