CN106268380B - A kind of polyelectrolyte film and its preparation method and application based on Sodium Glycinate - Google Patents
A kind of polyelectrolyte film and its preparation method and application based on Sodium Glycinate Download PDFInfo
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- CN106268380B CN106268380B CN201610828707.0A CN201610828707A CN106268380B CN 106268380 B CN106268380 B CN 106268380B CN 201610828707 A CN201610828707 A CN 201610828707A CN 106268380 B CN106268380 B CN 106268380B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/76—Macromolecular material not specifically provided for in a single one of groups B01D71/08 - B01D71/74
- B01D71/80—Block polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/228—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/18—Noble gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/24—Hydrocarbons
- B01D2256/245—Methane
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
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Abstract
The invention discloses a kind of polyelectrolyte film and preparation method thereof based on Sodium Glycinate, the film are made of polyether-polyamide block copolymer and Sodium Glycinate, and preparation method includes: the preparation steps of (1) sodium glycinate solution；(2) preparation steps of polyether-polyamide block copolymer solution；(3) preparation step of polyelectrolyte film.The polyelectrolyte film based on Sodium Glycinate that this method obtains can be used for separating CO2/CH4、CO2/N2Mixed gas, and its preparation process is simple, improves poly- electrolytic film gas separating property, and low in cost and easily available using the prices of raw materials, has potential industrial applications prospect.
Description
Technical field
The invention belongs to organic functional material technical fields, and in particular to a kind of polyelectrolyte film based on Sodium Glycinate.
Background technique
With the increasingly intensification of the energy and environmental crisis, efficient, low energy consumption is developed, environmental-friendly isolation technics is to solve
The key of energy gas purification and reduction of greenhouse gas discharge.Membrane separation technique be it is a kind of efficiently, low energy consumption, low-carbon, occupied area it is small,
One of easy-operating new separation technology, membrane material are the key components of membrane separation technique.The physical chemistry of membrane material
Matter decides the superiority and inferiority of the separating property of film, and the separating property of film determines the effect and operating cost of membrane separation technique, and film system
The length of standby complexity and service life then determines the cost of investment of UF membrane.Film can be divided into polymeric membrane, nothing by material
Machine film, macromolecular-inorganic hybrid membrane.Wherein, polymeric membrane has many advantages, such as that separating property is good, at low cost, easy processing, but its point
It is restricted from performance by " trade-off " effect, i.e., when permeability improves, selectivity declines, and vice versa, it is difficult to realize permeability
It is improved while with selectivity.
In recent years, with the continuous development of the research of membrane science and technology, polyelectrolyte film is as a kind of novel gas
The research of seperation film causes the concern of researchers.Polyelectrolyte film is prepared by polyelectrolyte material.Usually poly- electricity
Solving plasma membrane is that the hydrophilic membrane material containing ionizable ion is constituted, can be by this as the high molecular material structure of polyelectrolyte
At can also be made of hydrophilic macromolecule and salt.Therefore, polyelectrolyte film has high-hydrophilic, and in the state of swelling
Still there is certain mechanical strength, and the strong aquation of ion in film and the salting-out effect to nothing to be separated, so that poly-
Membrane materials for electrolyte shows good separating property, is expected to that " trade-off " effect is overcome to restrict.
Summary of the invention
The first purpose of this invention is the shortcomings that overcoming existing membrane material, provides a kind of poly- electricity based on Sodium Glycinate
Solve plasma membrane.
Second object of the present invention is to provide a kind of preparation method of polyelectrolyte film based on Sodium Glycinate.
Third object of the present invention is to provide the application of above-mentioned polyelectrolyte film.
What the purpose of the present invention implemented by the following technical programs:
A kind of polyelectrolyte film based on Sodium Glycinate, the film is by polyether-polyamide block copolymer and Sodium Glycinate group
At, wherein the mass ratio 1:(0.01-0.4 of polyether-polyamide block copolymer and Sodium Glycinate).
Further, the polyelectrolyte film based on Sodium Glycinate with a thickness of 115-150 μm.
The preparation method of the above-mentioned polyelectrolyte film based on Sodium Glycinate, includes the following steps:
(1) Sodium Glycinate is dissolved with solvent, obtains sodium glycinate solution；
(2) polyether-polyamide block copolymer is dissolved with solvent, obtains polyether-polyamide block copolymer solution；
(3) sodium glycinate solution and polyether-polyamide block copolymer solution are mixed, are cast, are dried to obtain the base
In the polyelectrolyte film of Sodium Glycinate.
Further, the solvent in step (1) is the ethanol water that mass fraction is 70%, Sodium Glycinate and solvent
Mass ratio is 1:(10-100).
Further, the solvent in step (2) is the ethanol water that mass fraction is 70%, and polyether-polyamide block is total
The mass percent concentration of copolymer solution is 1-7%.
It can be used for separating mixed gas by the polyelectrolyte film obtained by the above method based on Sodium Glycinate, further
, polyelectrolyte film is for the CO in Selective Separation gas2, it is preferred that polyelectrolyte film is for separating CO2/CH4Gaseous mixture
Body, CO2Flux is 380-1125barrer(1barrer=10-10 cm3 cm/cm2S cmHg), CO2/CH4Selectively it is
30-43；For separating CO2/N2Mixed gas, CO2Flux is 389-1201barrer, CO2/N2Selectivity is 50-84.
A kind of polyelectrolyte film based on Sodium Glycinate provided by the invention, preparation process is simple, in polyelectrolyte film
Due to containing Sodium Glycinate, the high water absorption characteristic and salting-out effect of Sodium Glycinate improve poly- electrolytic film gas separating property, and
It is low in cost and easily available using the prices of raw materials, there is potential industrial applications prospect.
Detailed description of the invention
Fig. 1 is the scanning electron microscope cross-section diagram of the polyelectrolyte film based on Sodium Glycinate obtained by embodiment 1；
Fig. 2 is the scanning electron microscope cross-section diagram of the polyelectrolyte film based on Sodium Glycinate obtained by embodiment 2；
Fig. 3 is the scanning electron microscope cross-section diagram of the polyelectrolyte film based on Sodium Glycinate obtained by embodiment 3；
Fig. 4 is the scanning electron microscope cross-section diagram of the polyelectrolyte film based on Sodium Glycinate obtained by embodiment 4；
Fig. 5 is the scanning electron microscope cross-section diagram of polyether-polyamide block copolymer film obtained by comparative example.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Raw material used in the present invention is that market can obtain product, wherein the trade name of polyether-polyamide block copolymer
Pebax® 1657。
Embodiment 1
Prepare a kind of polyelectrolyte film based on Sodium Glycinate, the polyelectrolyte film with a thickness of 115 μm, the polyelectrolyte
Sodium Glycinate is added using polyether-polyamide block copolymer as membrane matrix in film in membrane matrix, wherein polyether-polyamide block
The mass ratio 1:0.05 of copolymer and Sodium Glycinate, the polyelectrolyte film the preparation method is as follows:
The preparation of step 1, sodium glycinate solution:
The ethanol water 5g that mass fraction is 70% is added in sample cell, weighs 0.05g Sodium Glycinate, is added above-mentioned
It in sample cell, shakes up, until Sodium Glycinate dissolves, obtains sodium glycinate solution；
The preparation of step 2, polyether-polyamide block copolymer solution:
1.0g polyether-polyamide block copolymer is weighed to be dissolved in the ethanol water that 19g mass fraction is 70%,
For 24 hours, so that polyether-polyamide block copolymer all dissolves, it is 5% polyphenylene ether-polyamide that mass fraction, which is prepared, for 80 DEG C of stirrings
Block copolymer solution, it is spare.
The preparation of step 3, polyelectrolyte film:
It is 5% polyether-polyamide block that sodium glycinate solution made from step 1, which is added to mass fraction made from step 2,
In copolymer solution, stirs be cast on the glass plate for being poured into cleaning for 24 hours at room temperature, be dried at room temperature for for 24 hours, then will
It is put into 40 DEG C of vacuum drying ovens for 24 hours to remove remaining solvent, obtains the polyelectrolyte film with a thickness of 115 μm.
Embodiment 2
Prepare a kind of polyelectrolyte film based on Sodium Glycinate, with 1 polyelectrolyte film of embodiment except that: the thickness of film
Degree is 128 μm, wherein the mass ratio 1:0.1 of polyether-polyamide block copolymer and Sodium Glycinate, the system of the polyelectrolyte film
Standby being different only in that with the preparation method of embodiment 1: in step 1, will weigh 0.05g Sodium Glycinate becomes weighing the sweet ammonia of 0.1g
Sour sodium；In step 3, the polyelectrolyte film with a thickness of 128 μm is finally obtained.
Embodiment 3
Prepare a kind of polyelectrolyte film based on Sodium Glycinate, with 1 polyelectrolyte film of embodiment except that: the thickness of film
Degree is 143 μm, wherein the mass ratio 1:0.15 of polyether-polyamide block copolymer and Sodium Glycinate, the system of the polyelectrolyte film
Standby being different only in that with the preparation method of embodiment 1: in step 1, will weigh 0.05g Sodium Glycinate become weighing 0.15g it is sweet
Propylhomoserin sodium；In step 3, the polyelectrolyte film with a thickness of 143 μm is finally obtained.
Embodiment 4
Prepare a kind of polyelectrolyte film based on Sodium Glycinate, with 1 polyelectrolyte film of embodiment except that: the thickness of film
Degree is 150 μm, wherein the mass ratio 1:0.2 of polyether-polyamide block copolymer and Sodium Glycinate, the system of the polyelectrolyte film
Standby being different only in that with the preparation method of embodiment 1: in step 1, will weigh 0.05g Sodium Glycinate becomes weighing the sweet ammonia of 0.2g
Sour sodium；In step 3, the polyelectrolyte film with a thickness of 150 μm is finally obtained.
Embodiment 5
Prepare a kind of polyelectrolyte film based on Sodium Glycinate, with 1 polyelectrolyte film of embodiment except that: the thickness of film
Degree is 146 μm, wherein the mass ratio 1:0.3 of polyether-polyamide block copolymer and Sodium Glycinate, the system of the polyelectrolyte film
Standby being different only in that with the preparation method of embodiment 1: in step 1, will weigh 0.05g Sodium Glycinate becomes weighing the sweet ammonia of 0.3g
Sour sodium；In step 2, it is water-soluble that 1.0g polyether-polyamide block copolymer is changed to be dissolved in the ethyl alcohol that 14g mass fraction is 70%
In liquid, it is changed to 36h in 80 DEG C of mixings time, obtaining mass fraction is 6.7% polyether-polyamide block copolymer solution；Step 3
In, sodium glycinate solution is added in polyether-polyamide block copolymer solution, mixing time is changed to 36h at room temperature, finally
Obtain the polyelectrolyte film with a thickness of 146 μm.
Embodiment 6
Prepare a kind of polyelectrolyte film based on Sodium Glycinate, with 1 polyelectrolyte film of embodiment except that: the thickness of film
Degree is 140 μm, wherein the mass ratio 1:0.4 of polyether-polyamide block copolymer and Sodium Glycinate, the system of the polyelectrolyte film
Standby being different only in that with the preparation method of embodiment 1: in step 1, will weigh 0.05g Sodium Glycinate becomes weighing the sweet ammonia of 0.4g
Sour sodium；In step 2, it is water-soluble that 1.0g polyether-polyamide block copolymer is changed to be dissolved in the ethyl alcohol that 49g mass fraction is 70%
In liquid, it is changed to 48h in 80 DEG C of mixings time, obtaining mass fraction is 2% polyether-polyamide block copolymer solution；In step 3,
Sodium glycinate solution is added in polyether-polyamide block copolymer solution, mixing time is changed to 48h at room temperature, final to obtain
To the polyelectrolyte film with a thickness of 140 μm.
Comparative example
Polyether-polyamide block copolymer film is prepared, film thickness is 100 μm；Preparation method is: weighing 1.0g polyethers-
Polyamide block copolymer is dissolved in the ethanol water that 20g mass fraction is 70%, after 80 DEG C of stirrings for 24 hours, is poured into clean
It is cast, is dried at room temperature for for 24 hours on net glass plate, then put it into remaining molten to remove for 24 hours in 40 DEG C of vacuum drying ovens
Agent obtains the polyelectrolyte film with a thickness of 100 μm.
The polyether-polyamide block copolymer film that the polyelectrolyte film and comparative example obtained with embodiment obtains is for mixing
The separation of gas is tested, and test carries out under the conditions of room temperature, 2bar, and obtained test result see the table below:
It is compared by the above embodiments and comparative example, it can be seen that the separating property of polyelectrolyte film of the invention is bright
The performance of the aobvious polyether-polyamide block copolymer film without Sodium Glycinate being higher than in comparative example, mainly Sodium Glycinate
High water absorption characteristic and salting-out effect improve permeability of the membrane and selectivity.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although referring to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features.It is all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of purposes of the polyelectrolyte film based on Sodium Glycinate, it is characterised in that: the film is applied to Selective Separation CO2/
CH4CO in mixed gas2；
The film is made of polyether-polyamide block copolymer and Sodium Glycinate, wherein polyether-polyamide block copolymer with it is sweet
The mass ratio 1:(0.01-0.4 of propylhomoserin sodium).
2. purposes according to claim 1, which is characterized in that the thickness of the polyelectrolyte film based on Sodium Glycinate
It is 115-150 μm.
3. purposes of any of claims 1 or 2, which is characterized in that the polyelectrolyte film based on Sodium Glycinate is by including
Following steps are prepared:
(1) Sodium Glycinate is dissolved with solvent, obtains sodium glycinate solution；
(2) polyether-polyamide block copolymer is dissolved with solvent, obtains polyether-polyamide block copolymer solution；
(3) sodium glycinate solution and polyether-polyamide block copolymer solution are mixed, are cast, is dried to obtain described based on sweet
The polyelectrolyte film of propylhomoserin sodium.
4. purposes according to claim 3, which is characterized in that the solvent in step (1) is the ethyl alcohol that mass fraction is 70%
The mass ratio of aqueous solution, Sodium Glycinate and solvent is 1:(10-100).
5. purposes according to claim 3, which is characterized in that the solvent in step (2) is the ethyl alcohol that mass fraction is 70%
Aqueous solution, the mass percent concentration of polyether-polyamide block copolymer solution are 1-7%.
6. purposes according to claim 1, which is characterized in that CO2/CH4Selectivity is 30-43.
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| CN106975372B (en) * | 2017-04-18 | 2019-09-27 | 石河子大学 | Mixed substrate membrane containing nano-grade molecular sieve and preparation method and application based on flaky material filling |
| CN107875867B (en) * | 2017-11-09 | 2020-02-07 | 石河子大学 | Transfer-promoting membrane based on amino acid ionic liquid and preparation method and application thereof |
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