CN108404689A - A kind of graphene oxide/polyacrylamide combined filtration film and its preparation and application - Google Patents
A kind of graphene oxide/polyacrylamide combined filtration film and its preparation and application Download PDFInfo
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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
- B01D71/58—Other polymers having nitrogen in the main chain, with or without oxygen or carbon only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
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- C02F2101/34—Organic compounds containing oxygen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
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Abstract
It is using high polymer polyacrylamide as the laminated film of the graphene oxide and polyacrylamide of nano-scale enhanced with water flux and strainability prepared by the spacer of graphene oxide layer the invention discloses a kind of graphene oxide/polyacrylamide combined filtration film；There is the film graphene oxide layer packed structures are laminated, and each graphene oxide layer surface is uniformly attached with hydrophily flexible macromolecule polyacrylamide by electrostatic adsorption in structure, and the component of the laminated film is by percentage to the quality：Graphene oxide accounts for 90% ± 3%, and polyacrylamide accounts for 10% ± 3%, and the molecular weight of polyacrylamide is 1,000,000~3,000,000.Experiment confirms that the film of the present invention has hydrophily more superior than graphene oxide film, and piece interlamellar spacing is 0.68nm, has more excellent water flux and strainability, indicates that it is widely used in preparing water flux or strainability equipment.
Description
Technical field
The invention belongs to inorganic/polymer-function material technical field, it is related to a kind of water flux and strainability enhancing
Graphene oxide/polyacrylamide combined filtration film and its preparation and application.
Background technology
Membrane separation technique is in water process, food processing, is played an important role in chemical industry and pharmaceutical industry.With nano-pore
With the such as carbon nanotube of nanochannel, Nano-size Porous Graphite alkene, the uses of the materials such as graphene oxide is one and emerging grinds
Study carefully field and there are huge potentiality.In recent years since application of these materials potentially in terms of separation has attracted researcher
Huge interest.Graphene film is in necks such as filtering, separation, sea water desalination, bionical selective mechanism of mass transfer, energy storage and conversions
Domain is very promising.Derivative of the graphene oxide as graphene, also has been a great concern.
The two-dimensional structure of graphene oxide and adjustable physicochemical property make it have by being superimposed graphene oxide layer
Come the function of being screened.Graphene oxide film is successively assembled by being filtered by vacuum, prepared by spraying or the methods of spin coating
's.The lamella of graphene oxide, which has, allows water penetration, selectively refuses other substances, forms unique two-dimensional nano channel
Ability.
By adjusting the physicochemical properties of nano-pore, the number of plies of graphene film, so that it may with obtain needed for various
Gas and the ideal membrane flux of liquid.Small piece interlamellar spacing can reduce hydration functional group by partial reduction graphene oxide
Size or stannic oxide/graphene nano piece stacked by small molecule covalent bond obtained to go to overcome Hydration Force.Phase
Instead, can be by being inserted into big, rigid chemical group or flexible polymer chain or even larger sized nano particle or nanometer
Fiber is used as spacer to increase the distance between lamella.
Through retrieving one kind is prepared by the way that positively charged polyacrylamide to be used as to the spacer of graphene oxide layer
Laminated film of graphene oxide and polyacrylamide with filtering function of nano-scale and the preparation method and application thereof is also
It has not been reported.
Invention content
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of graphene oxide/polyacrylamide is compound
Filtration membrane and its preparation and application.
Graphene oxide of the present invention/polyacrylamide combined filtration film is made using high polymer polyacrylamide
For graphene oxide layer spacer prepared by nano-scale the graphite oxide enhanced with water flux and strainability
The laminated film of alkene and polyacrylamide；It is characterized in that：The laminated film has graphene oxide layer stacking accumulation knot
Structure, it is poly- to be uniformly attached with hydrophily flexible macromolecule by electrostatic adsorption for each graphene oxide layer surface in structure
The component of acrylamide, the laminated film is by percentage to the quality：Graphene oxide accounts for 90% ± 3%, and polyacrylamide accounts for
10% ± 3%, the molecular weight of polyacrylamide is 1,000,000~3,000,000, and the additive amount change of polyacrylamide can influence it is compound
The interlamellar spacing of graphene oxide layer in membrane structure, if the additive amount of polyacrylamide increases, the layer of graphene oxide layer
Spacing increases.
In above-mentioned graphene oxide/polyacrylamide combined filtration film：Graphene oxide/the polyacrylamide is compound
The component of filtration membrane is preferably by percentage to the quality：Graphene oxide accounts for 90%, and polyacrylamide accounts for 10%, polypropylene
The molecular weight of amide is 1,000,000~2,000,000；The interlamellar spacing of the graphene oxide/polyacrylamide combined filtration film is
0.68nm；The contact angle of graphene oxide/polyacrylamide combined filtration film and water is 65.1 °.
The interlamellar spacing (nanochannel) of above-mentioned graphene oxide/polyacrylamide combined filtration film passes through XRD determining.
The preparation method of graphene oxide of the present invention/polyacrylamide combined filtration film, step are：
(1) compound concentration is the graphene oxide water solution of 0.5~1mg/mL, and ultrasonic disperse is to uniform；
(2) the polyacrylamide aqueous amine that the molecular weight that compound concentration is 0.05mg/mL~0.1mg/mL is 1,000,000~3,000,000
Solution, and be stirred at room temperature to being completely dissolved；
(3) polyacrylamide solution made from step (2) is added drop-wise under agitation the graphite oxide of step (1)
In aqueous solution, and the mass percent of graphene oxide and polyacrylamide is made to be calculated as：Graphene oxide accounts for 90% ± 3%,
Polyacrylamide accounts for 10% ± 3%, that is, obtains graphene oxide/polyacrylamide amine compound；
(4) graphene oxide/polyacrylamide amine compound is taken to filter film forming by the method for vacuum filtration, film is naturally dry
It is dry, obtain graphene oxide/polyacrylamide combined filtration film；Wherein, graphene oxide/polyacrylamide amine compound is taken
The amount of suction filtration is different, and graphene oxide/polyacrylamide combined filtration film thickness difference, the big film forming thickness of amount of suction filtration is made
It is then thick.
Further, the step for the above-mentioned graphene oxide/preparation method of polyacrylamide combined filtration film is preferred is：
(1) graphene oxide water solution that compound concentration is 0.5, ultrasonic disperse is to uniform；
(2) polyacrylamide solution that the molecular weight that compound concentration is 0.05mg/mL is 100~2,000,000, and in room temperature
Lower stirring is to being completely dissolved；
(3) polyacrylamide solution made from step (2) is added drop-wise under agitation the graphite oxide of step (1)
In aqueous solution, stirs 2 hours and be uniformly mixed, and the mass percent of graphene oxide and polyacrylamide is made to be calculated as：Oxidation
Graphene accounts for 90%, and polyacrylamide accounts for 10%, that is, obtains graphene oxide/polyacrylamide amine compound；
(4) graphene oxide/polyacrylamide amine compound 10mL is taken to filter film forming by the method for vacuum filtration, certainly by film
It is so dry, obtain graphene oxide/polyacrylamide combined filtration film.
Graphene oxide of the present invention/polyacrylamide combined filtration film is preparing water flux or strainability equipment
In application.
The present invention makes negatively charged graphene oxide and positively charged polyacrylamide knot by electrostatic adsorption
Conjunction has obtained graphene oxide-polyacrylamide colloid solution, and then quantitative colloidal solution is prepared by being filtered by vacuum
Laminated film.Experiment confirms：The contact angle of graphene oxide filter membrane and water is 78.1 °, the graphene oxide filtering after reduction
The contact angle of film and water is 110.5 °, and the hydrophily of graphene oxide/polyacrylamide combined filtration film is better than both of the above,
It is 65.1 °.By XRD test analysis, the interlamellar spacing of graphene oxide filter membrane is about 0.85nm, the graphene oxide after reduction
The interlamellar spacing of filter membrane is 0.36nm, and the interlamellar spacing of graphene oxide/polyacrylamide combined filtration film is 0.68nm, this is
Since flexible polypropylene amide molecule has filled up the defect of surface of graphene oxide under pressure.
Performance test to the film progress water flux prepared and to rhodamine B rejection, the water flux of different samples
Test result is shown, minimum with the water flux of the graphene oxide filter membrane after reduction under identical sample volume, aoxidizes stone
The water flux of black alkene filter membrane is maximum, and the water flux of graphene oxide/polyacrylamide combined filtration film between the two it
Between, illustrate that polyacrylamide has played certain effect between graphene oxide layer.It is used molten and under same sample
Liquid product is bigger, that is, film thickness is bigger, and water flux is with regard to smaller.Different samples tests knot to the rejection of rhodamine B
Fruit shows, compared with the graphene oxide filter membrane after reduction, graphene oxide/polyacrylamide combined filtration film is for sieve
The interception capacity of red bright B dies down；In identical sample, for rhodamine B rejection with solution volume namely
The increase of the thickness of film and increase.The interlamellar spacing of graphene oxide filter membrane, table are changed by the addition of polyacrylamide
Different water fluxes is revealed and to rhodamine B rejection, the indication phase in preparing water flux or strainability equipment before applying
Scape is wide.
The present invention provides a kind of graphene oxide/polyacrylamide combined filtration film and its preparation and application.Pass through
Polyacrylamide of the molecular weight between 1,000,000~3,000,000 is prepared into one kind as the spacer of graphene oxide layer
The laminated film of the graphene oxide and polyacrylamide with filtering function of nano-scale.The polyacrylamide of nano-scale
With the preparation method of composite film of graphene oxide, negatively charged graphene oxide and positively charged is made by electrostatic adsorption
The polyacrylamide of lotus combines and has obtained graphene oxide-polyacrylamide colloid solution, then by being filtered by vacuum quantitative
Colloidal solution be prepared into laminated film.The present invention is used as graphene oxide layer spacer to increase by addition polyacrylamide
Add piece interlamellar spacing, to realize the filtering that some substances are carried out with selectivity, is finally obtained graphene oxide/polyacrylamide
Laminated film, by test, which has preferable water flux and strainability.
The advantage of the invention is that after obtaining graphene oxide/polyacrylamide composite solution, vacuum filtration is directly utilized
Graphene oxide/polyacrylamide laminated film is obtained, whole preparation process is all green, free of contamination, which has excellent
Different strainability is higher especially for the rejection of rhodamine B.Indicate graphene oxide/polyacrylamide of the present invention
Amine combined filtration film is widely used in preparing water flux or strainability equipment.
Description of the drawings
Fig. 1：For the SEM of graphene oxide made from embodiment 1/polyacrylamide combined filtration film；It can be with from figure
Find out, polyacrylamide is distributed more uniformly (a) in graphene oxide layer, and stacked in multi-layers is presented in combined filtration film
Structure (b).
Fig. 2：For graphene oxide filter membrane (a) made from embodiment 2, the graphene oxide filtration membrane (b) after reduction
With the FE-SEM pictures of graphene oxide/polyacrylamide combined filtration film (c)；From Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c)
As can be seen that the compactness of various filter membrane stacked in multi-layers is variant.
Fig. 3:For graphene oxide filter membrane (a), reduction after graphene oxide filtration membrane (b) and graphene oxide/
The contact angle picture of the different filtration membrane samples of three kinds of polyacrylamide combined filtration film (c), it can be seen from the figure that oxidation
The contact angle of graphene/polyacrylamide combined filtration film is minimum, illustrates that the hydrophily of combined filtration film is best.
Fig. 4:For the XRD test charts of three kinds of different samples, it can be seen from the figure that the characteristic peak positions of XRD are moved,
It is calculated by Bragg equation it is found that the interlamellar spacing of graphene oxide/polyacrylamide combined filtration film is about 0.68nm.
Fig. 5:For graphene oxide/polyacrylamide combined filtration film thermogravimetic analysis (TGA) as a result, can from figure
Go out, the thermal decomposition of the polyacrylamide amine molecule in graphene oxide/polyacrylamide combined filtration film start from 450 DEG C it is attached
Closely, end at 700 DEG C, illustrate that the presence of graphene oxide has polyacrylamide certain protective effect, make combined filtration
The thermal stability of film increases.
Fig. 6:For the water flux test result figure of different samples
As can be seen from Figure, under identical sample volume, the water flux with the graphene oxide filter membrane after reduction
The water flux of minimum, graphene oxide filter membrane is maximum, and the water flux of graphene oxide/polyacrylamide combined filtration film
It falls between, illustrates that polyacrylamide has played certain effect between graphene oxide layer.And same
Under product, liquor capacity used is bigger, that is, film thickness is bigger, and water flux is with regard to smaller.
Fig. 7:For the rejection test result figure of different samples
As can be seen from Figure, compared with the graphene oxide filter membrane after reduction, graphene oxide/polyacrylamide is multiple
Filtration membrane is closed to die down for the interception capacity of rhodamine B；In identical sample, for rhodamine B rejection with
The increase of the volume of solution i.e. the thickness of film and increase.
Specific implementation mode
Embodiment 1
(1) graphene oxide for taking 50mg is dissolved in 100ml distilled water, is configured to the oxidation stone of a concentration of 0.5mg/mL
Black aqueous solution, ultrasonic disperse is to uniform；
(2) it is 1,000,000 polyacrylamide to take 5mg molecular weight, is dissolved in 100ml distilled water, is configured to a concentration of
The polyacrylamide solution of 0.05mg/mL, stirring is to being completely dissolved；
(3) under agitation, the polyacrylamide solution of step (2) is added dropwise to the oxidation stone of step (1)
In black aqueous solution, stirs 2 hours and be uniformly mixed；
(4) it is to be mixed uniformly after, graphene oxide/polyacrylamide composite solution sample of 10mL is measured, using vacuum
The method of suction filtration filters film forming, and graphene oxide/polyacrylamide laminated film can be obtained after film is spontaneously dried.
Fig. 1 is the SEM of 1 laminated film of embodiment, from Fig. 1 (a) as can be seen that polyacrylamide is evenly distributed in oxidation
Graphene surface.
Fig. 1 (b) is the sectional view of laminated film, it can be seen from the figure that laminated film is the multilayered structure of layer upon layer,
And there is big weight polyacrylamide between layers.
Fig. 5 is the thermogravimetric analysis figure of laminated film, as can be seen from the figure graphene oxide/polyacrylamide combined filtration
The thermal decomposition of polyacrylamide amine molecule in film starts near 450 DEG C, ends at 700 DEG C, illustrates graphene oxide
In the presence of there is certain protective effect to polyacrylamide, the thermal stability of composite filtering film is made to increase.
Embodiment 2
First, the graphene oxide powder after taking 25mg to be freeze-dried is dissolved in 100mL distilled water, ultrasonic disperse, is prepared
At the graphene oxide water solution of a concentration of 0.25mg/mL；Then, solution is transferred in 100mL three-necked flasks and is stirred, used
Liquid-transfering gun pipettes 25uL, and the hydrazine hydrate solution that mass fraction is 35% is added drop-wise in three-necked flask；After stirring evenly, matter is added dropwise
The ammonia spirit that score is 28% is measured, the pH to 10 of reaction system is adjusted；The temperature of reaction system is finally increased to 90 DEG C, and
It reacts 2 hours at this temperature.Measure 10mL the identical different solutions sample of concentration, using vacuum filtration method filter at
Film can obtain graphene oxide filtration membrane and graphite oxide after graphene oxide filtration membrane, reduction after spontaneously drying film
Alkene/polyacrylamide combined filtration film.
Fig. 2 is the FE-SEM pictures of the different films of embodiment 2, from figure 3, it can be seen that from Fig. 2 (a), Fig. 2 (b) and Fig. 2
(c) as can be seen that the compactness of various filter membrane stacked in multi-layers is variant in.
Fig. 3 is the contact angle picture of the different films of embodiment 2, it can be seen from the figure that graphene oxide filter membrane and water
Contact angle be 78.1 ° (a), the contact angle of graphene oxide filter membrane and water after reduction is 110.5 ° (b), graphite oxide
The contact angle of alkene/polyacrylamide combined filtration film is 65.1 ° (c), illustrates that the hydrophily of combined filtration film is best.
Fig. 4 is the XRD test charts of the different films of embodiment 2, it can be seen from the figure that the characteristic peak positions of XRD are moved
It is dynamic, it is calculated by Bragg equation it is found that the interlamellar spacing of graphene oxide/polyacrylamide combined filtration film is about
The interlamellar spacing of 0.68nm, the graphene oxide filtration membrane after reduction are minimum, are 0.36nm.
Embodiment 3
(1) graphene oxide is taken, is dissolved in distilled water, is configured to graphene oxide water solution, ultrasonic disperse is to uniform；
(2) polyacrylamide is taken, is dissolved in distilled water, is configured to polyacrylamide solution, stirring is to being completely dissolved；
(3) under agitation, the polyacrylamide solution of step (2) is added dropwise to the oxidation stone of step (1)
In black aqueous solution, stirs 2 hours and be uniformly mixed；
(4) it is to be mixed uniformly after, graphene oxide/polyacrylamide composite solution sample of 10mL is measured, using vacuum
The method of suction filtration filters film forming, and graphene oxide/polyacrylamide laminated film can be obtained after film is spontaneously dried.
(5) oxygen of the graphene oxide solution and a concentration of 0.25mg/mL after the reduction of a concentration of 0.25mg/mL is prepared again
Graphite alkene solution, the solution of reciprocity volume, which uses, to be filtered by vacuum after film forming as a comparison.
(6) water flux and performance test to rhodamine B rejection are carried out to the film for preparing.
Wherein：A concentration of 0.5mg/mL of graphene oxide in step (1)；The molecular weight of polyacrylamide in step (2)
It is 1,000,000, a concentration of 0.05mg/mL；Step (3) mixes isometric graphene oxide water solution and polyacrylamide solution
It closes, a concentration of 0.25mg/mL of graphene oxide in mixed liquor；Graphene oxide in step (4) (5) for suction filtration is water-soluble
The volume of liquid, graphene oxide water solution and graphene oxide/polyacrylamide composite solution after reduction is respectively 1.0mL,
2.0mL, 3.0mL, 4.0mL, 5.0mL, 6.0mL, 7.0mL, 8.0mL, 9.0mL, 10.0mL.
The water flux test result of the different samples of table 1.
The water flux of the sample of different volumes is tested：
Fig. 6 is the water flux test result picture of the sample of different volumes, whether graphene oxide filter membrane, graphene
The thickness of filter membrane or GO/PAM filter membranes, pure water flux and filter membrane is all negatively correlated, when film forming aqueous solution used
Volume get over hour, the thickness of filter membrane is smaller, and corresponding pure water flux is bigger；When the volume of film forming aqueous solution used
When bigger, the thickness of filter membrane is also bigger, and corresponding pure water flux is with regard to smaller.And we are it is not difficult to find that work as water from figure
When the dosage of solution is higher than a certain value, i.e., after filter membrane reaches a certain thickness, the pure water flux of filter membrane maintain one compared with
Low value no longer reduces with the increase of filtering film thickness.
Under conditions of the dosage of aqueous solution is certain, i.e., when the thickness of filter membrane is identical, graphene oxide filter membrane
Pure water flux is more than pure water flux of the pure water flux more than graphene of GO/PAM filter membranes.This is determined by the interlamellar spacing of filter membrane
Fixed, surface of graphene oxide also has a large amount of oxygen-containing group, therefore the interlamellar spacing of obtained filter membrane is larger, forms and is conducive to
Pure water by channel；Graphene surface major part oxygen-containing group is reduced, therefore obtained filtering membrane structure is even closer, layer
Spacing is smaller, for pure water by channel reduce；In GO/PAM filter membranes, due to the flexibility of polyacrylamide, so poly- third
The moiety segments of acrylamide enter graphene oxide and accumulate in the channel to be formed, and also reduce its pure water flux.And it is different
Result of the test result of the pure water flux of filter membrane also with Fig. 4 X-ray diffractions matches.
Rejection test result of the different samples of table 2. to rhodamine B
The sample of different volumes tests the rejection of rhodamine B：
Fig. 7 is rejection test result picture of the sample to rhodamine B of different volumes, as seen from Figure 7, rejection
It is proportionate with the thickness of filter membrane, i.e., with the increase of filtering film thickness, the retention efficiency to rhodamine B molecule is more next
Higher.And when the thickness of filter membrane reaches certain value, tend towards stability to the crown_interception of rhodamine B molecule, at this time
Rejection stablize between 98%~99%, when be further continued for increase filter membrane thickness when, rejection no longer changes.
For between the identical different types of filter membrane of thickness, graphene filter membrane makees the retention of rhodamine B molecule
It is higher than the crown_interception of graphene oxide filter membrane with the crown_interception for being apparently higher than GO/PAM filter membranes, it is believed that main former
Interlamellar spacing because being different filter membranes is different.Such as when the dosage of aqueous solution is all 2ml (a concentration of 0.1mg/ml), graphene
Filter membrane has reached retention of 97.06%, the GO/PAM filter membranes to rhodamine B molecule to the rejection highest of rhodamine B molecule
Rate is taken second place, and about 95.43%, graphene oxide filter membrane is minimum to the rejection of rhodamine B molecule, is 85.03%.
Claims (5)
1. a kind of graphene oxide/polyacrylamide combined filtration film is using high polymer polyacrylamide as oxidation stone
Prepared by spacer of black alkene lamella nano-scale the graphene oxide and poly- third enhanced with water flux and strainability
The laminated film of acrylamide；It is characterized in that：There is the laminated film graphene oxide layer packed structures, structure is laminated
In each graphene oxide layer surface hydrophily flexible macromolecule polyacrylamide is uniformly attached with by electrostatic adsorption,
The component of the laminated film is by percentage to the quality：Graphene oxide accounts for 90% ± 3%, and polyacrylamide accounts for 10% ± 3%,
The molecular weight of polyacrylamide is 1,000,000~3,000,000, and the additive amount change of polyacrylamide can influence in complex thin film structure
The interlamellar spacing of graphene oxide layer, if the additive amount of polyacrylamide increases, the interlamellar spacing of graphene oxide layer increases.
2. graphene oxide/polyacrylamide combined filtration film according to claim 1, it is characterised in that：The oxidation
The component of graphene/polyacrylamide combined filtration film is by percentage to the quality：Graphene oxide accounts for 90%, polypropylene
Amide accounts for 10%, and the molecular weight of polyacrylamide is 1,000,000~2,000,000；The graphene oxide/polyacrylamide combined filtration
The interlamellar spacing of film is 0.68nm；The contact angle of graphene oxide/polyacrylamide combined filtration film and water is 65.1 °.
3. the preparation method of graphene oxide described in claim 1/polyacrylamide combined filtration film, step are：
(1) compound concentration is the graphene oxide water solution of 0.5~1mg/mL, and ultrasonic disperse is to uniform；
(2) polyacrylamide solution that the molecular weight that compound concentration is 0.05mg/mL~0.1mg/mL is 1,000,000~3,000,000,
And it is stirred at room temperature to being completely dissolved；
(3) polyacrylamide solution made from step (2) is added drop-wise under agitation the graphene oxide water of step (1)
In solution, and the mass percent of graphene oxide and polyacrylamide is made to be calculated as：Graphene oxide accounts for 90% ± 3%, poly- third
Acrylamide accounts for 10% ± 3%, that is, obtains graphene oxide/polyacrylamide amine compound；
(4) it takes graphene oxide/polyacrylamide amine compound to filter film forming by the method for vacuum filtration, film is spontaneously dried,
Obtain graphene oxide/polyacrylamide combined filtration film；Wherein, graphene oxide/polyacrylamide amine compound is taken to take out
The amount of filter is different, graphene oxide/polyacrylamide combined filtration film thickness difference is made, the big film forming thickness of amount of suction filtration is then
It is thick.
4. the preparation method of graphene oxide/polyacrylamide combined filtration film, step are according to claim 3：
(1) graphene oxide water solution that compound concentration is 0.5, ultrasonic disperse is to uniform；
(2) molecular weight that compound concentration is 0.05mg/mL is 100~2,000,000 polyacrylamide solution, and stirs at room temperature
It mixes to being completely dissolved；
(3) polyacrylamide solution made from step (2) is added drop-wise under agitation the graphene oxide water of step (1)
In solution, stirs 2 hours and be uniformly mixed, and the mass percent of graphene oxide and polyacrylamide is made to be calculated as：Graphite oxide
Alkene accounts for 90%, and polyacrylamide accounts for 10%, that is, obtains graphene oxide/polyacrylamide amine compound；
(4) graphene oxide/polyacrylamide amine compound 10mL is taken to filter film forming by the method for vacuum filtration, film is naturally dry
It is dry, obtain graphene oxide/polyacrylamide combined filtration film.
5. graphene oxide described in claims 1 or 2/polyacrylamide combined filtration film is preparing water flux or strainability
Application in equipment.
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| CN109758926A (en) * | 2018-10-31 | 2019-05-17 | 浙江工业大学 | A kind of functionalization graphene base nanofiltration membrane and the preparation method and application thereof |
| CN111676007A (en) * | 2020-06-15 | 2020-09-18 | 宁波锋成先进能源材料研究院 | Modified graphene oxide and preparation method and application thereof |
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| CN113604030A (en) * | 2021-08-10 | 2021-11-05 | 辽宁大学 | Hybrid membrane for solar seawater desalination and preparation method and application thereof |
| CN113797761A (en) * | 2021-07-16 | 2021-12-17 | 江苏师范大学 | Method for regulating and controlling performance of graphene oxide-based composite membrane |
| CN114525674A (en) * | 2022-01-19 | 2022-05-24 | 河北钢铁集团矿业有限公司 | High-performance anti-scaling modified filter cloth for vacuum filter and preparation method thereof |
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| CN107261859A (en) * | 2017-06-22 | 2017-10-20 | 浙江工业大学 | Preparation method of graphene oxide/polymer solvent-resistant composite nanofiltration membrane |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102145305A (en) * | 2011-04-08 | 2011-08-10 | 南京航空航天大学 | Method for preparing graphene-loaded nano alloy catalyst |
| WO2015042583A2 (en) * | 2013-09-23 | 2015-03-26 | Anand Srinivasan | Systems, devices, & methods for microbial detection & identification, and antimicrobial susceptibility testing |
| CN107261859A (en) * | 2017-06-22 | 2017-10-20 | 浙江工业大学 | Preparation method of graphene oxide/polymer solvent-resistant composite nanofiltration membrane |
Cited By (9)
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| CN109758926A (en) * | 2018-10-31 | 2019-05-17 | 浙江工业大学 | A kind of functionalization graphene base nanofiltration membrane and the preparation method and application thereof |
| CN109758926B (en) * | 2018-10-31 | 2022-02-11 | 浙江工业大学 | Functionalized graphene-based nanofiltration membrane as well as preparation method and application thereof |
| CN111676007A (en) * | 2020-06-15 | 2020-09-18 | 宁波锋成先进能源材料研究院 | Modified graphene oxide and preparation method and application thereof |
| CN112316751A (en) * | 2020-10-29 | 2021-02-05 | 南京工业大学 | Separation method of circulating tumor cells |
| CN114906843A (en) * | 2021-02-03 | 2022-08-16 | 南通第六元素材料科技有限公司 | Preparation method of graphene oxide film |
| CN113797761A (en) * | 2021-07-16 | 2021-12-17 | 江苏师范大学 | Method for regulating and controlling performance of graphene oxide-based composite membrane |
| CN113604030A (en) * | 2021-08-10 | 2021-11-05 | 辽宁大学 | Hybrid membrane for solar seawater desalination and preparation method and application thereof |
| CN114525674A (en) * | 2022-01-19 | 2022-05-24 | 河北钢铁集团矿业有限公司 | High-performance anti-scaling modified filter cloth for vacuum filter and preparation method thereof |
| CN114525674B (en) * | 2022-01-19 | 2024-03-22 | 河北钢铁集团矿业有限公司 | High-performance anti-scaling modified filter cloth for vacuum filter and preparation method thereof |
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