CN117181316A - Preparation method of monovalent anion selective solvent-resistant ion exchange membrane - Google Patents
Preparation method of monovalent anion selective solvent-resistant ion exchange membrane Download PDFInfo
- Publication number
- CN117181316A CN117181316A CN202310939474.1A CN202310939474A CN117181316A CN 117181316 A CN117181316 A CN 117181316A CN 202310939474 A CN202310939474 A CN 202310939474A CN 117181316 A CN117181316 A CN 117181316A
- Authority
- CN
- China
- Prior art keywords
- solvent
- exchange membrane
- paes
- preparation
- ion exchange
- 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.)
- Pending
Links
- 239000002904 solvent Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 37
- 239000003014 ion exchange membrane Substances 0.000 title claims abstract description 22
- 150000001450 anions Chemical class 0.000 title claims abstract description 17
- 229920000110 poly(aryl ether sulfone) Polymers 0.000 claims abstract description 57
- 239000003011 anion exchange membrane Substances 0.000 claims abstract description 24
- 238000005266 casting Methods 0.000 claims abstract description 14
- OXYZDRAJMHGSMW-UHFFFAOYSA-N 3-chloropropyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)CCCCl OXYZDRAJMHGSMW-UHFFFAOYSA-N 0.000 claims abstract description 12
- 125000002883 imidazolyl group Chemical group 0.000 claims abstract description 11
- 239000011521 glass Substances 0.000 claims abstract description 9
- -1 3- (6-bromohexyl) -1-butylimidazole Chemical compound 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 125000003277 amino group Chemical group 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 21
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 16
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 8
- 239000013557 residual solvent Substances 0.000 claims description 8
- 238000001291 vacuum drying Methods 0.000 claims description 8
- 239000003431 cross linking reagent Substances 0.000 claims description 7
- HDGLPTVARHLGMV-UHFFFAOYSA-N 2-amino-4-(1,1,1,3,3,3-hexafluoropropan-2-yl)phenol Chemical compound NC1=CC(C(C(F)(F)F)C(F)(F)F)=CC=C1O HDGLPTVARHLGMV-UHFFFAOYSA-N 0.000 claims description 6
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 6
- 238000004090 dissolution Methods 0.000 claims description 6
- 239000000706 filtrate Substances 0.000 claims description 6
- 239000002798 polar solvent Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- SGRHVVLXEBNBDV-UHFFFAOYSA-N 1,6-dibromohexane Chemical compound BrCCCCCCBr SGRHVVLXEBNBDV-UHFFFAOYSA-N 0.000 claims description 5
- SLLDUURXGMDOCY-UHFFFAOYSA-N 2-butyl-1h-imidazole Chemical compound CCCCC1=NC=CN1 SLLDUURXGMDOCY-UHFFFAOYSA-N 0.000 claims description 5
- 229920006393 polyether sulfone Polymers 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 239000004695 Polyether sulfone Substances 0.000 claims description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 4
- ZFVMWEVVKGLCIJ-UHFFFAOYSA-N bisphenol AF Chemical compound C1=CC(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C=C1 ZFVMWEVVKGLCIJ-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 4
- 229920005604 random copolymer Polymers 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 4
- PLVUIVUKKJTSDM-UHFFFAOYSA-N 1-fluoro-4-(4-fluorophenyl)sulfonylbenzene Chemical compound C1=CC(F)=CC=C1S(=O)(=O)C1=CC=C(F)C=C1 PLVUIVUKKJTSDM-UHFFFAOYSA-N 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 239000000178 monomer Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 2
- 230000001376 precipitating effect Effects 0.000 claims description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- UBKQRASXZMLQRJ-UHFFFAOYSA-N 2-phenylsulfanylethanamine Chemical compound NCCSC1=CC=CC=C1 UBKQRASXZMLQRJ-UHFFFAOYSA-N 0.000 claims 6
- 238000001637 plasma atomic emission spectroscopy Methods 0.000 claims 6
- 238000007306 functionalization reaction Methods 0.000 claims 1
- 239000012528 membrane Substances 0.000 abstract description 26
- 230000008961 swelling Effects 0.000 abstract description 15
- 239000003960 organic solvent Substances 0.000 abstract description 10
- 239000006087 Silane Coupling Agent Substances 0.000 abstract description 4
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 36
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 18
- 239000010408 film Substances 0.000 description 13
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 12
- 150000002500 ions Chemical class 0.000 description 9
- 229920000642 polymer Polymers 0.000 description 9
- 238000000909 electrodialysis Methods 0.000 description 8
- 238000005342 ion exchange Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 239000007864 aqueous solution Substances 0.000 description 6
- 238000013508 migration Methods 0.000 description 6
- 230000005012 migration Effects 0.000 description 6
- 239000012046 mixed solvent Substances 0.000 description 6
- 239000011780 sodium chloride Substances 0.000 description 6
- 238000010561 standard procedure Methods 0.000 description 6
- 238000010998 test method Methods 0.000 description 6
- 239000010409 thin film Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- LKJWDWUXGCKFPN-UHFFFAOYSA-N 4-(1,1,1,3,3,3-hexafluoropropan-2-yl)phenol Chemical compound OC1=CC=C(C(C(F)(F)F)C(F)(F)F)C=C1 LKJWDWUXGCKFPN-UHFFFAOYSA-N 0.000 description 1
- 102000004310 Ion Channels Human genes 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012456 homogeneous solution Substances 0.000 description 1
- 238000009396 hybridization Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229920000090 poly(aryl ether) Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000002390 rotary evaporation Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses a preparation method of a monovalent anion selective solvent-resistant ion exchange membrane, which comprises the following steps: (1) Preparing long side chain 3- (6-bromohexyl) -1-butylimidazole with imidazole structure; (2) preparing an amino group-containing Polyarylethersulfone (PAES); (3) Respectively dissolving side chain 3- (6-bromohexyl) -1-butylimidazole (BIm), silane coupling agent 3-chloropropyl trimethoxyl silane (CPTMS) and main chain Polyarylethersulfone (PAES), mixing according to a certain feeding ratio to obtain casting solution, pouring the casting solution on a glass plate, and drying at 60-100 ℃ to obtain the anion exchange membrane. The monovalent anion selective and solvent resistant ion exchange membrane prepared by the invention has low membrane surface resistance, low swelling ratio, high organic solvent tolerance and high selectivity.
Description
Technical Field
The invention relates to the field of high polymer materials, in particular to a preparation method of a monovalent anion selective solvent-resistant ion exchange membrane.
Background
The membrane separation technology has the characteristics of low energy consumption, simple operation, strong adaptability and the like, and is widely applied to the fields of wastewater treatment, sea water desalination, gas separation and the like. In the field of petrochemical industry, food processing, and biomedical industry, the separation of chemicals from organic solvents is often involved (J.Member. Sci.2017,538, 41-49). Conventional ion exchange membrane materials (e.g., polysulfones, polyethersulfones, polystyrenes, etc.) undergo membrane swelling (even dissolution) in an aqueous environment containing an organic solvent, resulting in a decrease in separation performance, which greatly limits the application of electrodialysis technology in complex industrial environments (J.Member. Sci.1997,123 (1) 143-14). Therefore, research and development of high-performance solvent-resistant films, and widening of the application of film technology in industrial fields are of great importance.
There are generally three methods for improving the solvent resistance of films: chemical crosslinking, organic-inorganic hybridization, and construction of intermediate layers. The nano particle material such as silicon dioxide has wide application in preparing organic-inorganic hybrid film, and the organic-inorganic hybrid film prepared by taking the silane coupling agent as the modifier has inorganic SiO 2 And the chemical stability and the functional characteristics of organic polymers, and simultaneously, a three-dimensional cross-linked network structure is built in the membrane. The invention adopts Polyarylethersulfone (PAES) as a main chain, and adds a side chain and a silane coupling agent, so that the prepared film has ion selectivity and simultaneously constructs a three-dimensional crosslinked network, thereby enhancing the dimensional stability and achieving long-term organic solvent resistance. PAES has a rigid structure, excellent mechanical stability, thermal stability and certain chemical stability, and after the side chain and the silane coupling agent are added, the PAES film has excellent monovalent ion selectivity, solvent resistance, heat resistance and pollution resistance, so that the IEMs can be better applied to the practical application scene of organic solvent desalination.
Disclosure of Invention
The invention aims to provide a preparation method of a monovalent anion selective solvent-resistant ion exchange membrane.
In order to solve the above-mentioned purpose, the invention adopts the following technical scheme:
a method for preparing a monovalent anion selective and solvent resistant ion exchange membrane comprising the steps of:
(1) Placing a certain amount of 1, 6-dibromohexane into a round-bottom flask and adding a solvent for dissolution; adding a certain amount of butylimidazole into a constant pressure dropping funnel to dissolve in a solvent to obtain a dilute solution; then the butylimidazole dilute solution is dripped into the 1, 6-dibromohexane dilute solution, heated and stirred, and white precipitation gradually appears along with the progress of the reaction; after the reaction is finished, filtering and precipitating, and collecting filtrate; concentrating the filtrate by evaporating the solvent to obtain concentrated liquid, and drying in a vacuum drying oven to remove residual solvent to obtain a long side chain with an imidazole structure shown in formula (I), wherein the long side chain is named as: 3- (6-bromohexyl) -1-butylimidazole (BIm)
(2) Dissolving a certain amount of three monomers of 4,4 '-difluorodiphenyl sulfone, 2' -bis (3-amino-4-hydroxyphenyl) hexafluoropropane and hexafluorobisphenol A in NMP, reacting for 4 hours at 145 ℃ under the protection of nitrogen by taking potassium carbonate as a salifying agent, and heating to 165 ℃ for reacting for 3 hours; cooling to room temperature after the reaction is finished, pouring the mixed solution into isopropanol, continuously stirring to obtain yellow-green precipitate, washing with deionized water for a plurality of times, and drying in a vacuum drying oven to obtain the polyether sulfone PAES random copolymer containing amino groups, wherein the polyether sulfone PAES random copolymer is shown in a formula (III), and has a molecular weight of 30000-60000:
(3) Preparation of anion exchange membrane: weighing a certain amount of side chains (I), cross-linking agents 3-chloropropyl trimethoxysilane (II) and PAES (III), and respectively dissolving in a polar solvent; firstly mixing a side chain and PAES according to a certain feeding ratio, fully reacting, adding a cross-linking agent into the mixed solution, fully mixing, heating and stirring to obtain clear and transparent casting solution, cooling to room temperature, vacuum defoamating, casting the casting solution on a clean glass plate, and vacuum drying at 60-100 ℃ for 12-36 hours to obtain an anion exchange membrane PAES-BIm-CPTMS with monovalent anion selectivity and solvent resistance, wherein the chemical structure of the anion exchange membrane PAES-BIm-CPTMS is shown as a formula (IV):
according to the invention, imidazole side chains and a cross-linking agent 3-chloropropyl trimethoxysilane are introduced, the proportion of the side chains and the cross-linking agent is regulated, the cross-linking agent and the main chain are tightly wound to form a three-dimensional network structure, the side chains charge the polymer, and a new chemical bond is generated in the cross-linking process, so that the membrane has solvent resistance and selectivity, and simultaneously, the lower resistance of the membrane surface is ensured.
Further, the reaction temperature in the step (1) is 30-70 ℃, and the reaction time is 12-36 hours, preferably 40 ℃, and 24 hours.
Further, the solvent in the step (1) is one or more of acetonitrile, acetone and tetrahydrofuran, preferably acetone.
Further, in the step (1), the weak polar solvent is one or more of diethyl ether, ethyl acetate and n-hexane, preferably alternatively washed by diethyl ether and ethyl acetate.
Further, the molar ratio of 2,2' -bis (3-amino-4-hydroxyphenyl) hexafluoropropane to hexafluorobisphenol a in the polyarylethersulfone PAES in step (2) is 7:3.
further, the PAES is functionalized in step (3) at a temperature of 30-90℃for a reaction time of 6-48 hours, preferably at 80℃for 12 hours and then at 60℃for 8 hours.
Further, in the step (3), the polar solvent is N-methylpyrrolidone.
Further, the temperature of the vacuum drying in the step (3) is 80 ℃ and the time is 24 hours.
The beneficial effects are that:
the invention prepares a series of polyarylether sulfonyl Anion Exchange Membranes (AEMs) containing cross-linked structures for electrodialysis. The optimized AEMs have higher IEC, low membrane surface resistance and higher transmission number, and the AEMs have rich ion exchange groups, so that a proper ion channel can be established to reduce ion transmission resistance. The optimized AEMs have low water absorption and swelling rate in water and various organic solvents, good dimensional stability is obtained, and meanwhile, as the AEMs have a three-dimensional cross-linked network structure, long side chains and main chains are tightly wound, the vibration of main chain ether bonds is weakened, the structure is more stable and compact, and the organic solvent resistance is stronger. The AEMs are evaluated for organic solvent resistance, are soaked in various organic solvents for a long time without dissolution and change in morphology, and are subjected to selectivity test, so that the selectivity is not obviously reduced, the current efficiency is high, the energy consumption is low, and the AEMs are superior to commercial membrane AMX, and have excellent organic solvent resistance and practical application value.
Drawings
FIG. 1 is a schematic representation of AEMs produced in example 4 of the present invention.
Table 1 is a graph of the physicochemical properties of the negative AEMs produced in examples 1-6 of the present invention.
Detailed Description
For further explanation of the technical solution of the present invention, preferred embodiments of the present invention are described below with reference to specific examples, but it should be understood that these descriptions are only for further explanation of features and advantages of the present invention, and are not limiting of the claims of the present invention.
Example 1:
preparation of polyarylethersulfone: 10.18 g (40 mmol) of 4,4' -difluorodiphenyl sulfone, 10.25 g (28 mmol) of 2,2' -bis (3-amino-4-hydroxyphenyl) hexafluoropropane and 4.03 g (12 mmol) of 2,2' -bis (4-hydroxyphenyl) hexafluoropropane were taken in a round-bottomed flask having a capacity of 250mL, NMP as solvent (120 mL) and 11.20 g K was added 2 CO 3 As a catalyst. Under nitrogen atmosphere, the reaction was carried out at 145℃for 4 hours, and the temperature was raised to 165℃for 3 hours. The temperature of the solution was reduced to room temperature, which was poured into 800mL of isopropanol and stirred to give a yellowish green flocculent polymer. After repeated washing with deionized water, the polymer was dried under vacuum at 80℃for 24 hours to give 17.54 g of an amino-containing polyarylethersulfone (PAES-NH) 2 The molar ratio of the 2,2' -bis (3-amino-4-hydroxyphenyl) hexafluoropropane is 70 percent, and the molecular weight is 56600。
Preparation of side chain: 50mL of acetone was placed in a 250mL round bottom three-necked flask, 40mmol (9.677 g) of 1, 6-dibromohexane was added under nitrogen atmosphere and stirred to dissolve, then 40mmol (4.964 g) of butylimidazole was added dropwise, heated to 40℃and stirred for 24 hours, and white precipitation gradually appeared as the reaction proceeded. After the reaction was completed, the precipitate was filtered and the filtrate was collected. The filtrate was subjected to rotary evaporation to give a small amount of solid and concentrated liquid, which were extracted with diethyl ether and ethyl acetate and washed alternately to give a pale yellow homogeneous solution, which was dried under vacuum at 60℃for 12 hours to give 9.7 g of side chain 3- (6-bromohexyl) -1-butylimidazole having an imidazole structure.
Preparation of polyarylethersulfone PAES membrane: 2.80 g of PAES polymer was dissolved in 60mL of NMP solvent, stirred magnetically at 80℃until it was completely dissolved, then 0.73 g of imidazole side chain was added, stirred for 12 hours, 2.36 g of 3-chloropropyl trimethoxysilane and 0.008 g of potassium iodide were added again at 60℃and stirred for 8 hours, cooled to room temperature, the casting solution was defoamed, poured onto a clean glass plate having an effective size of 8cm X8 cm (width X length), and dried under vacuum at 80℃for 24 hours, and the residual solvent was removed to obtain a colored thin film PAES having a film thickness of 151. Mu.m.
Experimental tests by adopting a national standard method show that the ion exchange capacity of the prepared solvent-resistant anion exchange membrane is 2.3 mmol.g -1 The surface resistance was 47.58 Ω cm 2 Ion migration number of 0.83, tensile strength of 31.7MPa, water swelling ratio of 4.3%, swelling ratio in 60% DMSO aqueous solution of 5.9%, cl of electrodialysis (initial solution of concentration chamber: 0.5M NaCl solution; solvent used in the solution is mixed solvent: 20% DMSO+80% water) - /SO 4 2- The selectivity was 3.7. The performance comparisons with commercial ion exchange membranes are shown in table 1. (for specific test methods, see literature report: journal of Membrane Science 574 (2019) 181-195;Journal of Membrane Science 577 (2019) 153-164).
Example 2:
preparation of polyarylethersulfone: polyarylethersulfones were prepared using the same procedure as in example 1.
Preparation of side chain: the side chains were prepared using the same preparation procedure as in example 1.
Preparation of polyarylethersulfone PAES membrane: 2.80 g of PAES polymer was dissolved in 60mL of NMP solvent, magnetically stirred at 80℃until complete dissolution, then 1.46 g of imidazole side chains were added, stirred for 12 hours, 1.96 g of 3-chloropropyl trimethoxysilane and 0.006 g of potassium iodide were added again at 60℃and cooled to room temperature after 8 hours of stirring, the casting solution was defoamed, poured onto a clean glass plate with an effective size of 8cm X8 cm (width X length), and dried under vacuum at 80℃for 24 hours, and the residual solvent was removed to give a colored thin film PAES with a film thickness of 152. Mu.m.
Experimental tests by adopting a national standard method show that the ion exchange capacity of the prepared solvent-resistant anion exchange membrane is 2.2 mmol.g -1 The surface resistance was 37.38Ω·cm 2 Ion migration number of 0.85, tensile strength of 29.7MPa, water swelling ratio of 4.7%, swelling ratio in 60% DMSO aqueous solution of 6.1%, cl of electrodialysis (initial solution of concentration chamber: 0.5M NaCl solution; solvent used in the solution is mixed solvent: 20% DMSO+80% water) - /SO 4 2- The selectivity was 4.3. The performance comparisons with commercial ion exchange membranes are shown in table 1. (for specific test methods, see literature report: journal of Membrane Science 574 (2019) 181-195;Journal of Membrane Science 577 (2019) 153-164).
Example 3:
preparation of polyarylethersulfone: polyarylethersulfones were prepared using the same procedure as in example 1.
Preparation of side chain: the side chains were prepared using the same preparation procedure as in example 1.
Preparation of polyarylethersulfone PAES membrane: 2.80 g of PAES polymer was dissolved in 60mL of NMP solvent, stirred magnetically at 80℃until it was completely dissolved, then 2.17 g of imidazole side chains were added, stirred for 12 hours, 1.57 g of 3-chloropropyl trimethoxysilane and 0.005 g of potassium iodide were further added at 60℃and stirred for 8 hours, cooled to room temperature, the casting solution was defoamed, poured onto a clean glass plate having an effective size of 8cm X8 cm (width X length), and dried under vacuum at 80℃for 24 hours, and the residual solvent was removed to give a colored thin film PAES having a film thickness of 150. Mu.m.
Experimental tests by adopting a national standard method show that the ion exchange capacity of the prepared solvent-resistant anion exchange membrane is 1.9 mmol.g -1 The surface resistance was 16.77. Omega. Cm 2 Ion migration number of 0.87, tensile strength of 24.7MPa, water swelling ratio of 5.3%, swelling ratio in 60% DMSO aqueous solution of 7.1%, cl of electrodialysis (initial solution of concentration chamber: 0.5M NaCl solution; solvent used in the solution is mixed solvent: 20% DMSO+80% water) - /SO 4 2- The selectivity was 7.1. The performance comparisons with commercial ion exchange membranes are shown in table 1. (for specific test methods, see literature report: journal of Membrane Science 574 (2019) 181-195;Journal of Membrane Science 577 (2019) 153-164).
Example 4:
preparation of polyarylethersulfone: polyarylethersulfones were prepared using the same procedure as in example 1.
Preparation of side chain: the side chains were prepared using the same preparation procedure as in example 1.
Preparation of polyarylethersulfone PAES membrane: 2.80 g of PAES polymer was dissolved in 60mL of NMP solvent, magnetically stirred at 80℃until complete dissolution, then 2.89 g of imidazole side chains were added, stirred for 12 hours, 1.17 g of 3-chloropropyl trimethoxysilane and 0.004 g of potassium iodide were further added at 60℃and cooled to room temperature after 8 hours of stirring, the casting solution was defoamed, poured onto a clean glass plate having an effective size of 8cm X8 cm (width X length), and vacuum dried at 80℃for 24 hours to remove the residual solvent, thereby obtaining a colored thin film PAES having a film thickness of 151. Mu.m.
Experimental tests by adopting a national standard method show that the ion exchange capacity of the prepared solvent-resistant anion exchange membrane is 1.8 mmol.g -1 The surface resistance was 6.38Ω·cm 2 Ion migration number of 0.89, tensile strength of 24.2MPa, water swelling ratio of 5.5%, swelling ratio in 60% DMSO aqueous solution of 7.6%, cl of electrodialysis (initial solution of concentration chamber: 0.5M NaCl solution; solvent used in the solution is mixed solvent: 20% DMSO+80% water) - /SO 4 2- The selectivity was 19. And business ofThe performance comparisons of the ion exchange membranes are shown in table 1. (for specific test methods, see literature report: journal of Membrane Science 574 (2019) 181-195;Journal of Membrane Science 577 (2019) 153-164).
Example 5:
preparation of polyarylethersulfone: polyarylethersulfones were prepared using the same procedure as in example 1.
Preparation of side chain: the side chains were prepared using the same preparation procedure as in example 1.
Preparation of polyarylethersulfone PAES membrane: 2.80 g of PAES polymer was dissolved in 60mL of NMP solvent, stirred magnetically at 80℃until it was completely dissolved, then 3.62 g of imidazole side chains were added, stirred for 12 hours, then 0.78 g of 3-chloropropyl trimethoxysilane and 0.003 g of potassium iodide were added at 60℃and stirred for 8 hours, then cooled to room temperature, the casting solution was defoamed, poured onto a clean glass plate having an effective size of 8cm X8 cm (width X length), and dried under vacuum at 80℃for 24 hours, and the residual solvent was removed to obtain a colored thin film PAES having a film thickness of 152. Mu.m.
Experimental tests by adopting a national standard method show that the ion exchange capacity of the prepared solvent-resistant anion exchange membrane is 1.8 mmol.g -1 The surface resistance was 5.99. Omega. Cm 2 Ion migration number of 0.91, tensile strength of 23.9MPa, water swelling ratio of 5.6%, swelling ratio in 60% DMSO aqueous solution of 7.7%, cl of electrodialysis (initial solution of concentration chamber: 0.5M NaCl solution; solvent used in the solution is mixed solvent: 20% DMSO+80% water) - /SO 4 2- The selectivity was 4.3. The performance comparisons with commercial ion exchange membranes are shown in table 1. (for specific test methods, see literature report: journal of Membrane Science 574 (2019) 181-195;Journal of Membrane Science 577 (2019) 153-164).
Example 6:
preparation of polyarylethersulfone: polyarylethersulfones were prepared using the same procedure as in example 1.
Preparation of side chain: the side chains were prepared using the same preparation procedure as in example 1.
Preparation of polyarylethersulfone PAES membrane: 2.80 g of PAES polymer was dissolved in 60mL of NMP solvent, stirred magnetically at 80℃until it was completely dissolved, then 4.34 g of imidazole side chains were added, stirred for 12 hours, then 0.39 g of 3-chloropropyl trimethoxysilane and 0.002 g of potassium iodide were added at 60℃and stirred for 8 hours, then cooled to room temperature, the casting solution was defoamed, poured onto a clean glass plate having an effective size of 8cm X8 cm (width X length), and dried under vacuum at 80℃for 24 hours, and the residual solvent was removed to obtain a colored thin film PAES having a film thickness of 155. Mu.m.
Experimental tests by adopting a national standard method show that the ion exchange capacity of the prepared solvent-resistant anion exchange membrane is 1.6 mmol.g -1 The surface resistance was 4.78Ω·cm 2 Ion migration number of 0.93, tensile strength of 23.2MPa, water swelling ratio of 6.3%, swelling ratio in 60% DMSO aqueous solution of 7.9%, cl of electrodialysis (initial solution of concentration chamber: 0.5M NaCl solution; solvent used in the solution is mixed solvent: 20% DMSO+80% water) - /SO 4 2- The selectivity was 3.2. The performance comparisons with commercial ion exchange membranes are shown in table 1. (for specific test methods, see literature report: journal of Membrane Science 574 (2019) 181-195;Journal of Membrane Science 577 (2019) 153-164).
Table 1 physicochemical property charts of AEMs are prepared in examples 1-6.
Claims (8)
1. A method for preparing a monovalent anion selective and solvent resistant ion exchange membrane comprising the steps of:
(1) Placing a certain amount of 1, 6-dibromohexane into a round-bottom flask and adding a solvent for dissolution; adding a certain amount of butylimidazole into a constant pressure dropping funnel to dissolve in a solvent to obtain a dilute solution; then the butylimidazole dilute solution is dripped into the 1, 6-dibromohexane dilute solution, heated and stirred, and white precipitation gradually appears along with the progress of the reaction; after the reaction is finished, filtering and precipitating, and collecting filtrate; concentrating the filtrate by evaporating the solvent to obtain concentrated liquid, and drying in a vacuum drying oven to remove residual solvent to obtain long side chain with imidazole structure as shown in formula (I), which is named as 3- (6-bromohexyl) -1-butylimidazole (BIm):
(2) Dissolving a certain amount of three monomers of 4,4 '-difluorodiphenyl sulfone, 2' -bis (3-amino-4-hydroxyphenyl) hexafluoropropane and hexafluorobisphenol A in NMP, reacting for 4 hours at 145 ℃ under the protection of nitrogen by taking potassium carbonate as a salifying agent, and heating to 165 ℃ for reacting for 3 hours; cooling to room temperature after the reaction is finished, pouring the mixed solution into isopropanol, continuously stirring to obtain yellow-green precipitate, washing with deionized water for a plurality of times, and drying in a vacuum drying oven to obtain the polyether sulfone PAES random copolymer containing amino groups, wherein the polyether sulfone PAES random copolymer is shown in a formula (III), and has a molecular weight of 30000-60000:
(3) Preparation of anion exchange membrane: weighing a certain amount of long side chain (I), cross-linking agent 3-chloropropyl trimethoxysilane (II) and PAES (III), and respectively dissolving in a polar solvent; firstly mixing a long side chain with PAES according to a certain feeding ratio, fully reacting, adding a cross-linking agent into the mixed solution, fully mixing, heating and stirring to obtain clear and transparent casting solution, cooling to room temperature, vacuum defoaming, casting the casting solution on a clean glass plate, and vacuum drying at 60-100 ℃ for 12-36 hours to obtain an anion exchange membrane PAES-BIm-CPTMS with monovalent anion selectivity and solvent resistance, wherein the chemical structure of the anion exchange membrane PAES-BIm-CPTMS is shown as a formula (IV):
2. a process for the preparation of a monovalent anion selective and solvent resistant ion exchange membrane according to claim 1, wherein: the reaction temperature in step (1) is 30-70 ℃, and the reaction time is 12-36 hours, preferably 40 ℃ and 24 hours.
3. A process for the preparation of a monovalent anion selective and solvent resistant ion exchange membrane according to claim 1, wherein: the solvent in the step (1) is one or more of acetonitrile, acetone and tetrahydrofuran, preferably acetone.
4. A process for the preparation of a monovalent anion selective and solvent resistant ion exchange membrane according to claim 1, wherein: the weak polar solvent in the step (1) is one or more of diethyl ether, ethyl acetate and n-hexane, preferably diethyl ether and ethyl acetate are alternatively washed.
5. A process for the preparation of a monovalent anion selective and solvent resistant ion exchange membrane according to claim 1, wherein: the molar ratio of 2,2' -bis (3-amino-4-hydroxyphenyl) hexafluoropropane to hexafluorobisphenol A in the PAES of the step (2) is 7:3.
6. a process for the preparation of a monovalent anion selective and solvent resistant ion exchange membrane according to claim 1, wherein: the PAES functionalization temperature in step (3) is 30-90℃and the reaction time is 6-48 hours, preferably 80℃for 12 hours followed by 60℃for 8 hours.
7. A process for the preparation of a monovalent anion selective and solvent resistant ion exchange membrane according to claim 1, wherein: the polar solvent in the step (3) is N-methyl pyrrolidone.
8. A process for the preparation of a monovalent anion selective and solvent resistant ion exchange membrane according to claim 1, wherein: the temperature of the vacuum drying in the step (3) is 80 ℃ and the time is 24 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310939474.1A CN117181316A (en) | 2023-07-28 | 2023-07-28 | Preparation method of monovalent anion selective solvent-resistant ion exchange membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310939474.1A CN117181316A (en) | 2023-07-28 | 2023-07-28 | Preparation method of monovalent anion selective solvent-resistant ion exchange membrane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117181316A true CN117181316A (en) | 2023-12-08 |
Family
ID=88995052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310939474.1A Pending CN117181316A (en) | 2023-07-28 | 2023-07-28 | Preparation method of monovalent anion selective solvent-resistant ion exchange membrane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117181316A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117567729A (en) * | 2024-01-19 | 2024-02-20 | 固碳新能源科技(苏州)有限公司 | Ion-conducting polymer and preparation method thereof, ion-conducting cross-linked substance and preparation method thereof, anion exchange membrane and application thereof |
-
2023
- 2023-07-28 CN CN202310939474.1A patent/CN117181316A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117567729A (en) * | 2024-01-19 | 2024-02-20 | 固碳新能源科技(苏州)有限公司 | Ion-conducting polymer and preparation method thereof, ion-conducting cross-linked substance and preparation method thereof, anion exchange membrane and application thereof |
| CN117567729B (en) * | 2024-01-19 | 2024-05-28 | 固碳新能源科技(苏州)有限公司 | Ion-conducting polymer and preparation method thereof, ion-conducting cross-linked substance and preparation method thereof, anion exchange membrane and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Irfan et al. | Augmenting acid recovery from different systems by novel Q-DAN anion exchange membranes via diffusion dialysis | |
| WO2011038198A1 (en) | Anion exchange polyelectrolytes | |
| Gu et al. | PVA-based hybrid membranes from cation exchange multisilicon copolymer for alkali recovery | |
| CN117181316A (en) | Preparation method of monovalent anion selective solvent-resistant ion exchange membrane | |
| CN110479109B (en) | Preparation method of polyvinylidene fluoride mixed matrix membrane with high flux and strong pollution resistance | |
| CN110756230A (en) | Preparation method of polyether sulphone anion exchange membrane with homogeneous cross-linked structure | |
| TWI648296B (en) | Fluoropolymer and film containing fluoropolymer (I) | |
| CN107573501A (en) | A kind of cross-linking fluorine-containing sulfonated polyether compound and preparation method thereof | |
| CN113078339A (en) | Anion exchange membrane containing POSS and block copolymer and preparation method thereof | |
| Dai et al. | Crosslinked PVA-based hybrid membranes containing di-sulfonic acid groups for alkali recovery | |
| Zhang et al. | Synthesis and characterizations of novel, positively charged hybrid membranes from poly (2, 6-dimethyl-1, 4-phenylene oxide) | |
| CN110760079B (en) | Preparation method of alkyl side chain type polyarylether sulphone anion exchange membrane with homogeneous cross-linked structure | |
| CN113717418B (en) | Preparation method of side-chain type pyridinium functionalized polyether sulphone anion exchange membrane | |
| CN116351254A (en) | Preparation method of solvent-resistant anion exchange membrane with cross-linked structure | |
| CN110681271B (en) | NH2-MIL-125/POD-COOH ultrathin homogeneous hybrid forward osmosis membrane and preparation method thereof | |
| CN111533913A (en) | Side chain type amphoteric structure polyether sulphone, preparation method thereof and homogeneous phase amphoteric ion exchange membrane | |
| Khan et al. | Development of high performance anion exchange membranes for diffusion dialysis process | |
| CN113683805B (en) | Preparation method of cross-linked imidazole functionalized polyether sulphone anion exchange membrane containing benzimidazole structure | |
| CN105669984B (en) | Skeleton contains phosphonyl group and the block polymer of ammonium ion and preparation method thereof | |
| CN114797506B (en) | Preparation method and application of ionized polyimide gas separation membrane | |
| CN112457495B (en) | Preparation method of homogeneous anion exchange membrane | |
| Lee et al. | Preparation and characterization of various poly (ether ether ketone) containing imidazolium moiety for anion exchange membrane fuel cell application | |
| CN117358068B (en) | CO (carbon monoxide) 2 Separation composite membrane and preparation method thereof | |
| CN114044853B (en) | Biomass-based EC-g-PSSA graft copolymer and preparation method and application thereof | |
| CN112608504B (en) | Cross-linked sulfonated polyarylethersulfone for generating micro-nano bubbles, preparation method and cross-linked sulfonated polyarylethersulfone membrane |
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 |