CN106861446A - A kind of microporous polymer membranes, its preparation method and application - Google Patents
A kind of microporous polymer membranes, its preparation method and application Download PDFInfo
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- CN106861446A CN106861446A CN201510927396.9A CN201510927396A CN106861446A CN 106861446 A CN106861446 A CN 106861446A CN 201510927396 A CN201510927396 A CN 201510927396A CN 106861446 A CN106861446 A CN 106861446A
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- colloidal sol
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Abstract
A kind of microporous polymer membranes, its preparation method and application, the preparation method of the film are comprised the following steps：It is in molar ratio 5~25 by TFMS and organic monomer：1 mixing, in N2Synthetic reaction is carried out under protection in -10 DEG C~-40 DEG C, colloidal sol is formed；Gelation film forming, solidification, washing on flat board carrier by the colloidal sol again, dries.The present invention synthesizes the casting solution of microporous polymer membranes at low temperature, and easy film forming, repeatability is high, film properties stabilization, with good gas and liquid separating property, the such polymeric casting film liquid for overcoming high―temperature nuclei in the prior art is highly carbonized, the bad defect of film-formation result.In addition, the present invention is in film forming procedure, there is no particular/special requirement to used carrier, plate glass is that may conform to demand, it is easy to which industry is amplified.
Description
Technical field
The present invention relates to the synthesis of microporous polymer membranes, in particular, provide a kind of high using sol-gel process
The method for imitating synthetic microporous polymer film, belongs to technical field of membrane separation.
Background technology
Gas membrane Seperation Technology is 20 century 70s research and development successfully a new generation's gas separation, and it is former
Reason is under certain pressure-driven, by each component in mixed gas in the adsorption capacity on film surface and in film
Difference in internal dissolubility and diffusivity, i.e. infiltration rate difference reach the effect of separation.With traditional gas
Body method compares (cryogenic rectification method, pressure swing adsorption method and absorption process), and gas membrane Seperation Technology has without phase
Become, energy consumption is low, equipment is simple, and the advantages of easy to operate, and unit scale can according to the requirement for the treatment of capacity
Greatly can be small.
Covalent triazine skeleton (Covalent Triazine Based Frameworks, CTFs) be a class have C,
H, N element connect the organic matter with regular duct skeleton to be formed with covalent bond, and such material is by containing
There is-CN to be cyclized what is formed by catalytic trimerization, with heat endurance high, chemical stability high is acidproof
Alkali, resistance to oxidation.The 1,3,5-triazines ring formed in polymerization has a permanent quadrupole moment, larger polarizability and
Electron affinity so that the material has this to be widely applied prospect in UF membrane field.A few days ago, numerous science
Family synthesizes the powder of the material using the method that Lewis acid High temperature ion thermocatalytics are cyclized, and applies in gas
The fields such as separation, solution absorption, homogeneous catalysis, pressure sensing.But use the method for High temperature ion heat to close
Into product be highly carbonized, it is difficult to be prepared into film, the performance after film forming is also poor.
The content of the invention
In order to solve to prepare microporous polymer membranes in the prior art using the hot method of High temperature ion, the product of synthesis
Highly it is carbonized, it is difficult to be prepared into film, the present invention provides synthetic microporous polymer under a kind of cryogenic conditions
The method of film, film properties stabilization, separating property is excellent.
To reach above technical purpose, the technical solution adopted by the present invention is as follows：
A kind of preparation method of microporous polymer membranes, comprises the following steps：
1. colloidal sol substrate liquid is synthesized：It is in molar ratio 5~25 by TFMS and organic monomer：1 mixing,
In N2Synthetic reaction is carried out under protection in -10 DEG C~-40 DEG C, colloidal sol is formed；
The organic monomer is selected from 1,4- terephthalonitriles, 4,4 '-biphenyl dintrile, the nitrile of 1,3,5- benzene three and 2,6- dintrile
One kind in yl pyridines；
2. collosol and gel film forming：The colloidal sol that 1. step is prepared gelation film forming on flat board carrier, solidification,
Washing, dries.
Further, in above-mentioned preparation method, the organic monomer is preferably 4, and 4 '-biphenyl dintrile or Isosorbide-5-Nitrae-
Terephthalonitrile, wherein most preferably 4,4 '-biphenyl dintrile.
Further, in above-mentioned preparation method, the mol ratio of the TFMS and organic monomer is preferred
It is 15~25：1, reaction temperature is preferably -20 DEG C~-40 DEG C.
Further, in above-mentioned preparation method, step 1. described in synthetic reaction time be 2~6h.
Further, in above-mentioned preparation method, the step process by collosol and gel film forming 2., colloidal sol
Gelling temperature is 70~110 DEG C, and preferably 90~105 DEG C, preferably temperature is 100 DEG C.The film forming
Mode is preferably blade coating film forming, and the flat board carrier is plate glass；As preferred specific embodiment,
Knifing machine can be heated to being intended to the temperature of gelation, plate glass is placed, colloidal sol is carried out on plate glass
Blade coating film forming, keeping temperature is 50~110 DEG C, 5~140min is solidified at preferably 90~105 DEG C, preferably
5~20min；
Further, in above-mentioned preparation method, step 2. described in washing be that the film after solidification is cooled to room
Temperature, is positioned in deionized water and peels off film, then with respectively washing 2~5 times of deionized water and ethanol.
Further, in above-mentioned preparation method, step 2. described in dry for vacuum drying.
Further, in made as described above method, the invention provides a kind of most preferred technical scheme,
The microporous polymer membranes are prepared using following methods：
It is in molar ratio 20 by TFMS and 4,4 '-biphenyl dintrile：1 mixing, in N2In -40 DEG C under protection
2~4h of synthetic reaction, forms colloidal sol；By the colloidal sol in gelation film forming on 90~105 DEG C of flat board carrier,
Keeping temperature solidifies 5~20min, and washing is dried.
Second aspect, present invention also offers the microporous polymer membranes prepared using above-mentioned preparation method.
The third aspect, separates present invention also offers microporous polymer membranes of the present invention in liquids and gases
In application.In terms of gas separation, the microporous polymer membranes are separating CO2(such as CO2/CH4Or
CO2/N2) in have good effect.In terms of liquid separation, the microporous polymer membranes can be used for water and
The separation of organic solvent soluble in water, such as water/acetic acid.
Compared with prior art, the invention has the advantages that：
The present invention synthesizes the casting solution of microporous polymer membranes at low temperature, and easy film forming, repeatability is high, and system
Standby film properties stabilization, with good liquids and gases separating property, overcomes the conjunction of prior art high temperature
Into such polymeric casting film liquid be highly carbonized, the bad defect of film-formation result；In addition, the present invention is in film forming
During, there is no particular/special requirement to used carrier, plate glass is that may conform to demand, it is easy to which industry is amplified.
Brief description of the drawings
Fig. 1 is the Fourier transform infared spectrum of microporous polymer membranes I；
Fig. 2 is the scanning electron microscope diagram of microporous polymer membranes I；
Fig. 3 is microporous polymer membranes I to H2、CO2、O2、N2And CH4One-component gas permeability
Test result；
Fig. 4 is H2、CO2、N2And CH4One-component gas at various pressures to microporous polymer membranes
I testing permeability result；
Fig. 5 is microporous polymer membranes I to CO2/CH4And CO2/N2Ideal separation factor is bent with pressure change
Line
Fig. 6 is acetic acid/water infiltration evaporation test result.
Specific embodiment
Embodiment 1
Prepare microporous polymer membranes I：
1. colloidal sol substrate liquid is synthesized：There-necked flask is fixed in low-temperature circulating water dispenser, regulation temperature is -40 DEG C；
0.408g 4 is taken, 4 '-biphenyl dintrile (0.002mol) is added in there-necked flask, in N2With drop under protective atmosphere
Add mode adds 3.5mL CF3SO3H (0.04mol), reacts 2h under magnetic stirring.
2. collosol and gel film forming：Treat colloidal sol after completion of the reaction, have been warmed up the plate glass for 100 DEG C
On carry out knifing, the 10min that is heating and curing is continued afterwards.Treat that film is cooled to room temperature, be placed on deionized water
In, film is separated with glass, then is respectively washed 3 times with deionized water, ethanol, is positioned over 110 DEG C of vacuum drying oven
Under be dried 12h, obtain microporous polymer membranes I.
The sample for taking microporous polymer membranes I carries out FTIR spectrum measure, as a result such as the infrared figure of Fig. 1
Spectrum:1492cm-1、1352cm-1、804cm-1It is 1,3,5-triazines ring skeleton vibration peak, it can be seen that have triazine
Ring is formed；As can be seen that polymer film is without crystalline substance from the scanning electron microscope diagram of the polymer film of Fig. 2
Body structure, particle size is nanoscale.
The performance test of film：
Gas separates test：
Gas separates test and uses Wicke-Kallenbach methods, and microporous polymer membranes I are surveyed
Examination analysis, membrane area S=0.000254m2Under the conditions of carry out separation test.Fig. 3 is microporous polymer membranes I
To H2、CO2、O2、N2And CH4One-component gas permeability test result, it is seen that as gas is dynamic
Aerodynamic diameter increases the decline of its permeation flux；Fig. 4 is H2、CO2、N2And CH4One-component gas exist
To the testing permeability result of microporous polymer membranes I under different pressures, it is seen that as pressure increases, each gas
Permeability it is basicly stable, in an experiment it has also been found that, with CO2There is plastic deformation in pressure rise, the film
Phenomenon；Fig. 5 is microporous polymer membranes I to CO2/CH4And CO2/N2Ideal separation factor is with pressure change
Curve.
Liquid separates test：
Liquid separates the method that test uses infiltration evaporation, and separation test is carried out to microporous polymer membranes I,
Acetic acid/water=50/50 (mass ratio) system, in pressure P=1atm, membrane area S=0.000254m2Under the conditions of enter
Row separates test, as a result as shown in Fig. 6, table 1.Fig. 6 is the separating resulting of acetic acid/water mixed system；Table 1 is
The permeation flux of the different mono-component liquids of microporous polymer membranes I pair, it is seen that microporous polymer membranes of the invention can
For between each organic solvent or organic solvent and water separation.
Table 1
Embodiment 2
Prepare microporous polymer membranes II：
1. colloidal sol substrate liquid is synthesized：There-necked flask is fixed in low-temperature circulating water dispenser, regulation temperature is -40 DEG C；
Take 0.700g para-Phthalonitriles (0.005mol) to be added in there-necked flask, in N2With dropwise addition under protective atmosphere
Mode adds 3.5mL CF3SO3H (0.04mol), reacts 2h under magnetic stirring.
2. collosol and gel film forming：Treat colloidal sol after completion of the reaction, substrate drop is added in φ with glue head dropper
In the culture dish of 30mm, afterwards in 50 DEG C of 120min that are heating and curing.Treat that film is cooled to room temperature, put
In deionized water, respectively washed 3 times with deionized water, ethanol again afterwards, be positioned over 110 DEG C of vacuum drying oven
Under be dried 12h, obtain microporous polymer membranes II.
The test result of microporous polymer membranes II such as table 2.
Table 2
Embodiment 3
1. colloidal sol substrate liquid is synthesized：There-necked flask is fixed in low-temperature circulating water dispenser, regulation temperature is -40 DEG C；
Take the nitrile (0.0033mol) of 1,3,5- benzene of 0.505g three to be added in there-necked flask, in N2With drop under protective atmosphere
Add mode adds 3.5mL CF3SO3H (0.04mol), reacts 2h under magnetic stirring.
2. collosol and gel film forming：Treat colloidal sol after completion of the reaction, substrate drop is added in flat board with glue head dropper
On glass, 100 DEG C of 10min that are heating and curing, or substrate drop is added in the culture of φ 30mm with glue head dropper
In ware, 50 DEG C of 120min that are heating and curing.All without film forming sign after two kinds of curings, be placed on from
In sub- water, respectively washed 3 times with deionized water, ethanol again afterwards, being positioned at 110 DEG C of vacuum drying oven is carried out
12h is dried, what is obtained is powdery.
Embodiment 4
1. colloidal sol substrate liquid is synthesized：There-necked flask is fixed in heating mantle, the nitrile of 1,3,5- benzene of 0.505g three is taken
(0.0033mol) is dissolved in 30g chloroforms, is then added in there-necked flask, in N2With drop under protective atmosphere
Add mode adds 3.5mL CF3SO3H (0.04mol), adjusts temperature for respectively 25 DEG C, 60 DEG C and 100 DEG C,
In magnetic agitation heating reflux reaction 2h.
2. collosol and gel film forming：Treat colloidal sol after completion of the reaction, in the visible oily liquids of drag, use glue
Head dropper is suctioned out, and is added dropwise in α-Al2O3In the culture dish of piece and φ 30mm, it is heating and curing at 50 DEG C afterwards,
24h has no film-forming sign, it is impossible to film forming.It is placed in deionized water, uses deionization again afterwards
Water, ethanol are respectively washed 3 times, are positioned at 110 DEG C of vacuum drying oven and are dried 12h, and what is obtained is powder
Shape material.
Embodiment 5
1. colloidal sol substrate liquid is synthesized：There-necked flask is fixed in low-temperature circulating water dispenser, regulation temperature is -40 DEG C；
0.646g 2 is taken, 6- dintrile yl pyridines (0.005mol) is added in there-necked flask, in N2With drop under protective atmosphere
Add mode adds 3.5mL CF3SO3H (0.04mol), reacts 2h under magnetic stirring.
2. collosol and gel film forming：Treat colloidal sol after completion of the reaction, substrate drop is added in flat board with glue head dropper
On glass, 100 DEG C of 10min that are heating and curing, or substrate drop is added in the culture of φ 30mm with glue head dropper
In ware, 50 DEG C of 120min that are heating and curing.Two kinds of curings are placed on deionization all without film forming sign
In water, respectively washed 3 times with deionized water, ethanol again afterwards, be positioned at 110 DEG C of vacuum drying oven and done
Dry 12h, what is obtained is powdery.
Embodiment 6
1. colloidal sol substrate liquid is synthesized：There-necked flask is fixed in heating mantle, the nitrile of 1,3,5- benzene of 0.51g three is taken
(0.0033mol) is dissolved in 30g chloroforms, is then added in there-necked flask, in N2With drop under protective atmosphere
Add mode adds 3.5mL CF3SO3H (0.04mol), adjusts temperature for respectively 25 DEG C, 60 DEG C and 100 DEG C,
In magnetic agitation heating reflux reaction 2h.
2. collosol and gel film forming：Treat colloidal sol after completion of the reaction, in the visible oily liquids of drag, use glue
Head dropper is suctioned out, and is added dropwise in α-Al2O3In the culture dish of piece and φ 30mm, it is heating and curing at 50 DEG C afterwards,
24h has no film-forming sign, it is impossible to film forming.It is placed in deionized water, uses deionization again afterwards
Water, ethanol are respectively washed 3 times, are positioned at 110 DEG C of vacuum drying oven and are dried 12h, and what is obtained is powder
Shape material.
Claims (10)
1. a kind of preparation method of microporous polymer membranes, comprises the following steps：
1. colloidal sol substrate liquid is synthesized：It is in molar ratio 5~25 by TFMS and organic monomer：1 mixing,
In N2Synthetic reaction is carried out under protection in -10 DEG C~-40 DEG C, colloidal sol is formed；
The organic monomer is selected from 1,4- terephthalonitriles, 4,4 '-biphenyl dintrile, the nitrile of 1,3,5- benzene three and 2,6- dintrile
One kind in yl pyridines；
2. collosol and gel film forming：The colloidal sol that 1. step is prepared gelation film forming on flat board carrier, solidification,
Washing, dries.
2. preparation method according to claim 1, it is characterised in that step 1. described in synthesis it is anti-
The time answered is 2~6h.
3. preparation method according to claim 1, it is characterised in that the 2. described colloidal sol of step coagulates
Gelatinization temperature is 70~110 DEG C, preferably 90~105 DEG C.
4. preparation method according to claim 1, it is characterised in that step 2. described in film forming side
Formula is blade coating film forming.
5. preparation method according to claim 1, it is characterised in that step 2. described in be cured as
In 50~110 DEG C of solidifications, preferably 90~105 DEG C, the time is 5~140min.
6. preparation method according to claim 1, it is characterised in that step 2. described in washing be
Film after solidification is cooled to room temperature, is positioned in deionized water and is peeled off film, then it is each with deionized water and ethanol
Washing 2~5 times.
7. preparation method according to claim 1, it is characterised in that the polymer film use with
It is prepared by lower specific steps：
It is in molar ratio 20 by TFMS and 4,4 '-biphenyl dintrile：1 mixing, in N2In -40 DEG C under protection
2~4h of synthetic reaction, forms colloidal sol；By the colloidal sol in gelation film forming on 90~105 DEG C of flat board carrier,
Keeping temperature solidifies 5~20min, and washing is dried.
8. the microporous polymer membranes that prepared by the preparation method described in claim 1~7 any one.
9. application of the microporous polymer membranes described in claim 8 in gas separation.
10. application of the microporous polymer membranes described in claim 8 in liquid separation.
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| CN110075902A (en) * | 2019-05-22 | 2019-08-02 | 浙江工业大学 | A kind of deficiency covalent triazine frame material derived material catalyst and its preparation method and application |
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| CN110736772A (en) * | 2019-11-05 | 2020-01-31 | 河北工业大学 | NO based on covalent triazine based two-dimensional polymers2Gas sensor and preparation method and application thereof |
| CN112029104A (en) * | 2019-06-03 | 2020-12-04 | 中国科学院大连化学物理研究所 | Metal organic framework film prepared by vapor-assisted epitaxial growth method and application thereof |
| CN113304631A (en) * | 2021-06-07 | 2021-08-27 | 徐州禹慧环境科技研究院有限公司 | Preparation method of organic framework microporous membrane |
| CN113337095A (en) * | 2021-07-22 | 2021-09-03 | 天津工业大学 | Self-polymerization microporous polymer fluorinated membrane and preparation method and application thereof |
| CN115216117A (en) * | 2022-09-21 | 2022-10-21 | 深圳市板明科技股份有限公司 | Modified hole plugging resin for circuit board and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110252249A (en) * | 2019-05-15 | 2019-09-20 | 浙江工业大学 | Covalent triazine framework material and its preparation method and application with abundant defect |
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| CN110075902A (en) * | 2019-05-22 | 2019-08-02 | 浙江工业大学 | A kind of deficiency covalent triazine frame material derived material catalyst and its preparation method and application |
| CN110075902B (en) * | 2019-05-22 | 2022-02-15 | 浙江工业大学 | Defective covalent triazine framework material derivative material catalyst and preparation method and application thereof |
| CN112029104A (en) * | 2019-06-03 | 2020-12-04 | 中国科学院大连化学物理研究所 | Metal organic framework film prepared by vapor-assisted epitaxial growth method and application thereof |
| CN112029104B (en) * | 2019-06-03 | 2021-05-25 | 中国科学院大连化学物理研究所 | Metal organic framework film prepared by vapor-assisted epitaxial growth method and application thereof |
| CN110736772A (en) * | 2019-11-05 | 2020-01-31 | 河北工业大学 | NO based on covalent triazine based two-dimensional polymers2Gas sensor and preparation method and application thereof |
| CN113304631A (en) * | 2021-06-07 | 2021-08-27 | 徐州禹慧环境科技研究院有限公司 | Preparation method of organic framework microporous membrane |
| CN113337095A (en) * | 2021-07-22 | 2021-09-03 | 天津工业大学 | Self-polymerization microporous polymer fluorinated membrane and preparation method and application thereof |
| CN113337095B (en) * | 2021-07-22 | 2022-05-03 | 天津工业大学 | Self-polymerization microporous polymer fluorinated membrane and preparation method and application thereof |
| CN115216117A (en) * | 2022-09-21 | 2022-10-21 | 深圳市板明科技股份有限公司 | Modified hole plugging resin for circuit board and preparation method thereof |
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Application publication date: 20170620 |