CN108159889A - A kind of super hydrophilic-superoleophobic redox graphene filter membrane and purposes - Google Patents
A kind of super hydrophilic-superoleophobic redox graphene filter membrane and purposes Download PDFInfo
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- CN108159889A CN108159889A CN201711361205.2A CN201711361205A CN108159889A CN 108159889 A CN108159889 A CN 108159889A CN 201711361205 A CN201711361205 A CN 201711361205A CN 108159889 A CN108159889 A CN 108159889A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0202—Separation of non-miscible liquids by ab- or adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/08—Thickening liquid suspensions by filtration
- B01D17/085—Thickening liquid suspensions by filtration with 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
- B01D67/0079—Manufacture of membranes comprising organic and inorganic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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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- 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
- B01D71/02—Inorganic material
- B01D71/021—Carbon
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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
- B01D71/02—Inorganic material
- B01D71/024—Oxides
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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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/36—Hydrophilic membranes
Abstract
The present invention relates to the redox graphene filter membranes and purposes of a kind of superhydrophilic superoleophobic, belong to technical field of separation membrane preparation.First, graphene oxide, nano zine oxide are added in distilled water, ultrasonic disperse；Add the dopamine solution containing dopamine hydrochloride, mechanical agitation；Then by the method for vacuum filtration, mixed solution suction filtration is deposited into mixed cellulose ester membrane surface, drying is to obtain the final product described super hydrophilic underwater superoleophobic without support redox graphene filter membrane from coming off.Redox graphene basement membrane prepared by the present invention has higher water throughout curve, flux and stability, and the advantages of preventing membrane pollution, oily waste water can be efficiently separated, is provided for water-oil separating a kind of efficient, environmental protection and economic technological means, have important practical significance.
Description
Technical field
The present invention relates to a kind of super hydrophilic-superoleophobic redox graphene filter membrane and purposes, belong to separation film preparation
Technical field.
Background technology
Oil plays an important role in modern day life and social development, while brings serious environment dirty again
Dye.Oil emulsion constitutes environmental and human health impacts serious threat, how to handle emulsification as common and intractable pollution sources
Oil is as in the urgent need to address in world wide and challenging subject.Membrane separation technique is because of its considerable flux and Bi Qi
The simpler technique of his technology, has been widely used for removing oil emulsion from water.However, oil droplet or the production of the surfactant of absorption
Raw dirt is always to limit its widely applied critical issue.Scholars from the hydrophobicity and fish scale of lotus leaf in water refuse oil
Property is inspired, by chemical composition and the reasonable combination of coarse surface structure degree, super-hydrophobic super-oleophylic obtained or super close
The super wet material of water super-hydrophobicity, huge interest is caused in scientific circles, they are in fields such as environment remediation, water-oil separatings
Have broad application prospects.
Current membrane separation technique is perfect not enough, mix hydroaropic substance and surface be modified made from filter membrane, in addition to because
Come off the problem for the treatment of effeciency is caused to decline for coating material, also exists because the property of basilar memebrane in itself influences lacking for resistance tocrocking
It falls into.
Invention content
For deficiency exists in the prior art, the present invention provides a kind of super hydrophilic-underwater superoleophobic without support reduction
The preparation method of graphene oxide filter membrane and water-oil separating application, the preparation method are simple and practicable.
The present invention achieves the above technical objects by the following technical means.
It is a kind of super hydrophilic-underwater superoleophobic without support redox graphene filter membrane, it is characterised in that：Dopamine conduct
Excellent reducing agent and auto polymerization end-capping reagent while redox graphene, are being aoxidized by simple auto polymerization reaction
Graphene and nano-zinc oxide compound surface form bionical poly-dopamine film, which not only has good viscous
Attached property can be used as crosslinking agent, nano material be made tightly to combine, simultaneously as poly-dopamine existing hydrophilic radical in itself, such as
Catechu phenolic group and amido make the nanocomposite of preparation be endowed super hydrophilic and underwater superoleophobic property.Mixed liquor filters deposition
To microporous membrane surface, coming off certainly after dry, it is described super hydrophilic-underwater superoleophobic without support redox graphene filter to be formed
Film.
Further, mixed cellulose ester membrane of the miillpore filter for 0.22 μm of aperture.
Further, first, graphene oxide, nano zine oxide are added in distilled water, ultrasonic disperse；Add containing
The dopamine solution of dopamine hydrochloride, mechanical agitation；Then by the method for vacuum filtration, mixed solution suction filtration is deposited to
Mixed cellulose ester membrane surface, drying are to obtain the final product described super hydrophilic-underwater superoleophobic without support redox graphene from coming off
Filter membrane.
Further, the mass ratio of graphene oxide and nano zine oxide is 2：1~3.
Further, the mass ratio of graphene oxide and dopamine hydrochloride is 1:2~8.
Further, the ultrasonic disperse time is 20-60min.
Further, the preparation method of the graphene oxide is to prepare graphite oxide with improvement Hummers methods first, and
Graphite oxide is removed using ultrasound, obtains graphene oxide.
Further, the preparation method of the nano zine oxide：Six acetate hydrate zinc of 4g and 0.132g lemons are weighed respectively
Acid is placed in beaker, is added in 100ml deionized waters, is stirred to whole dissolvings.Above-mentioned pH value of solution is adjusted to the NaOH of 1mol/L
11-13, ultrasonic reaction 0.5h.Mixed liquor after ultrasound is put into hydrothermal reaction kettle, is placed in 120-200 DEG C of reaction in drying box
24h.High speed centrifugation after taking-up with absolute ethyl alcohol and deionized water is cleaned, final product is dried at room temperature for, obtained repeatedly
Particulate matter grind into powder.
Further, the preparation method of the dopamine solution：Dopamine hydrochloride is added in Tris buffer solutions, machine
Dopamine solution is obtained after tool stirring.
The mass volume ratio of the dopamine hydrochloride and Tris buffer solutions is：10-40mg：10mL.
Further, the Tris buffer concentrations be 0.1-1M, pH value 8.5.
The churned mechanically time is 12-24h.
It is described super hydrophilic-underwater superoleophobic to be used for water-oil separating without support redox graphene filter membrane.
In recent years, graphene is concerned in physics, the application field in the fields such as chemistry and material science.At present, graphite
It is easiest to most potential method be reduced graphene oxide serving in alkene large-scale production, covered with hydroxyl, carboxyl, epoxy
Base and other oxygen-containing groups.For the common reducing agent of reduced graphene oxide serving, such as hydrazine hydrate, quinhydrones and sodium borohydride etc.,
It is always subjected to the obstruction of its intrinsic toxic or harmful property.Dopamine has excellent as environment friendly material
Reproducibility and auto polymerization, the redox graphene film for assigning the poly-dopamine coating of preparation it is super hydrophilic and underwater superoleophobic
Wetting behavior.Although research reduction-oxidation graphite material extensively at present, application range is from conductive film, Nano filling material
Expect the multifunctional platforms such as anchoring functional polymer, but so far, be seldom included in emulsification sewage treatment field.
At present, using wide hydrophilic composite material be titanium dioxide, but its cost is higher, preparation process is complicated and
It is not easy to recycle.Zinc oxide has similar gap energy to titanium dioxide, and simultaneous oxidation zinc also has good embodiment in wellability,
It also has a series of special performances such as antibacterial bacteriostatic, the anti-enzyme of taste of dispelling.
The present invention prepares graphene oxide using cheap graphite material, then adds in the good dopamine of reproducibility and prepares
Redox graphene takes full advantage of two-dimensional structure redox graphene with excellent hydrophilic and mechanical performance and DOPA
Amine coating contains the characteristics of hydrophilic radicals such as catechu phenolic group and amido.It is combined with hydrophilic nano zine oxide, in dopamine
Under crosslinked action tightly combine redox graphene lamella and nano zine oxide, nano particle be covered in sheet surfaces make it is coarse
Degree increases, and promotes hydrophilic and oleophobic property, and the nano particle interted between lamella adjusts channel design, expands interlamellar spacing, conducive to formation
Hydrophilic barrier by oil, water, film three phase separation, promotes preventing membrane pollution performance.Using the method for suction filtration, nanocomposite is sunk
Product after dry comes off to microporous membrane surface, is formed without support filter membrane, do not interfered by basilar memebrane, thickness is easy to control, technique certainly
Simply.Redox graphene basement membrane prepared by the present invention has higher water throughout curve, flux and stability, and anti-film
The advantages of pollution, can efficiently separate oily waste water, and a kind of efficient, environmental protection and economic technological means are provided for water-oil separating,
With important practical significance.
Description of the drawings
Fig. 1 is the X-ray diffractogram of redox graphene base filter membrane of the present invention.
Fig. 2 is redox graphene and the compound front and rear electron-microscope scanning image of nano zine oxide.
Fig. 3 is water contact angle and underwater oily contact angle test result figure in redox graphene base filter membrane air.
Oily contact angle is tested under the millipore water that Fig. 4 is redox graphene and prepared by nano zine oxide different composite ratio
Result figure.
Fig. 5 is the oil-water separation figure of redox graphene base filter membrane of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated, but protection scope of the present invention is simultaneously
It is without being limited thereto.
Embodiment 1
(1) graphene oxide is prepared to improve Hummers methods
Under ice bath state, 3g graphite powders, 40mL concentrated phosphoric acids and 360mL concentrated sulfuric acid magnetic force are added in 500mL three-necked flasks
It stirs evenly.Then 18g potassium permanganate is slowly added portionwise, after being sufficiently stirred reaction, three-necked flask is transferred to oil bath from ice bath
And temperature is risen to 50 DEG C and reacts 12 hours while stirs.
Liquid to be mixed, which is cooled to room temperature, is put into ice-water bath, and 30% hydrogen peroxide is gradually instilled until solution with the dilution of 1L distilled water
Glassy yellow is presented.Vacuum filtration filter cake is rinsed with dilute hydrochloric acid, and 8000rpm is centrifuged 5 minutes, pickling 3 times, removes the sulfuric acid in solution
Radical ion.10000rpm is centrifuged 10 minutes, washes 5 times, pH value of solution is adjusted to neutrality；Vacuum at 60 DEG C of product of centrifugation is obtained to do
It is dry.
Products therefrom is dissolved in the stripping of distilled water ultrasound, vacuum drying chamber drying.
(2) nano zine oxide is prepared
Six acetate hydrate zinc of 4g is weighed respectively and 0.132g citric acids are placed in beaker, adds in 100ml deionized waters, stirring
To whole dissolvings.Above-mentioned pH value of solution is adjusted to 11 with the NaOH of 1mol/L, ultrasonic reaction 0.5h.Mixed liquor after ultrasound is put into water
In thermal response kettle, it is placed in drying box and reacts for 24 hours for 120 DEG C.High speed centrifugation after taking-up is repeatedly clear with absolute ethyl alcohol and deionized water
It washes, final product is dried at room temperature for, obtained particulate matter grind into powder.
(3) dopamine solution is prepared
10mg dopamine hydrochlorides are weighed, adds in the Tris solution of 10mL pH=8.5, stirs evenly.
(4) nano material is compound.
5mg graphene oxides, 2.5mg nano zine oxides are weighed, nano zine oxide is 2 with graphene oxide mass ratio：1,
It adds in 50mL distilled water, ultrasonic disperse 30min.
(5) dopamine solution is added in above-mentioned dispersion liquid, mechanical agitation is for 24 hours.
(6) composite filter membrane is prepared.
By the method for vacuum filtration, mixed solution suction filtration is deposited into mixed cellulose ester membrane surface.In 40 DEG C of baking ovens
Middle placement one night drying, comes off certainly, obtains super hydrophilic-underwater superoleophobic without support redox graphene filter membrane.
Tested through water droplet contact angle in air, preparation it is super hydrophilic-underwater superoleophobic without support redox graphene
The contact angle of filter membrane reaches 0 ° or so；Underwater droplets contact angle test, the super hydrophilic-superoleophobic under water of preparation restore without support
The contact angle of graphene oxide filter membrane reaches 157 ° or so, has good underwater superoleophobic property；To contain diesel oil, chloroform, soya-bean oil
Oil emulsion for, oil-containing removal rate is up to 99%.X-ray diffraction test, the reduction-oxidation graphite of preparation are carried out to it
Alkene, nano zine oxide is all corresponding with the characteristic peak of standard card, and the collection of illustrative plates of composite membrane shows that two kinds of substance successes are compound, due to also
Nano zine oxide is wrapped up and covered by former graphene oxide, and characteristic peak becomes smaller or disappears.Scanned Electronic Speculum test, it is observed that
Redox graphene nanometer sheet wraps up nano zine oxide, significantly improves surface roughness.It is interspersed in the nanometer of interlayer
Grain, improves piece interlayer channel design, is conducive to improve flux and antifouling property.
Embodiment 2
(1) graphene oxide is prepared to improve Hummers methods
Under ice bath state, 3g graphite powders, 40mL concentrated phosphoric acids and 360mL concentrated sulfuric acid magnetic force are added in 500mL three-necked flasks
It stirs evenly.Then 18g potassium permanganate is slowly added portionwise, after being sufficiently stirred reaction, three-necked flask is transferred to oil bath from ice bath
And temperature is risen to 50 DEG C and reacts 12 hours while stirs.
Liquid to be mixed, which is cooled to room temperature, is put into ice-water bath, and 30% hydrogen peroxide is gradually instilled until solution with the dilution of 1L distilled water
Glassy yellow is presented.Vacuum filtration filter cake is rinsed with dilute hydrochloric acid, and 8000rpm is centrifuged 5 minutes, pickling 3 times, removes the sulfuric acid in solution
Radical ion.10000rpm is centrifuged 10 minutes, washes 5 times, pH value of solution is adjusted to neutrality；Vacuum at 60 DEG C of product of centrifugation is obtained to do
It is dry.
Products therefrom is dissolved in the stripping of distilled water ultrasound, vacuum drying chamber drying.
(2) nano zine oxide is prepared
Six acetate hydrate zinc of 4g is weighed respectively and 0.132g citric acids are placed in beaker, adds in 100ml deionized waters, stirring
To whole dissolvings.Above-mentioned pH value of solution is adjusted to 11 with the NaOH of 1mol/L, ultrasonic reaction 0.5h.Mixed liquor after ultrasound is put into water
In thermal response kettle, it is placed in drying box and reacts for 24 hours for 120 DEG C.High speed centrifugation after taking-up is repeatedly clear with absolute ethyl alcohol and deionized water
It washes, final product is dried at room temperature for, obtained particulate matter grind into powder.
(3) dopamine solution is prepared
20mg dopamine hydrochlorides are weighed, adds in the Tris solution of 10mL pH=8.5, stirs evenly.
(4) nano material is compound.
5mg graphene oxides, 5mg nano zine oxides are weighed, nano zine oxide is 2 with graphene oxide mass ratio：2, add
Enter in 50mL distilled water, ultrasonic disperse 30min.
(5) dopamine solution is added in above-mentioned dispersion liquid, mechanical agitation 18h.
(6) composite filter membrane is prepared.
By the method for vacuum filtration, mixed solution suction filtration is deposited into mixed cellulose ester membrane surface.In 40 DEG C of baking ovens
Middle placement one night drying, comes off certainly, obtains super hydrophilic-underwater superoleophobic without support redox graphene filter membrane.
Tested through water droplet contact angle in air, preparation it is super hydrophilic-underwater superoleophobic without support redox graphene
The contact angle of filter membrane reaches 0 ° or so；Underwater droplets contact angle test, the super hydrophilic-superoleophobic under water of preparation restore without support
The contact angle of graphene oxide filter membrane reaches 160 ° or so, has good underwater superoleophobic property；To contain diesel oil, chloroform, soya-bean oil
Oil emulsion for, oil-containing removal rate is up to 99%.
Compared with Example 1, nano zine oxide ratio added by this example increases, and becomes redox graphene piece interlamellar spacing
Greatly, be conducive to increase flux, while surface roughness increases, make its hydrophilic and oleophobic property enhancing, antifouling property is promoted.Dopamine
Ratio and reaction time increase, and make redox graphene and nano zine oxide adhesion promotion, are conducive to promote membrane material
Stability and make up reduction after hydrophily.
Embodiment 3
(1) graphene oxide is prepared to improve Hummers methods
Under ice bath state, 3g graphite powders, 40mL concentrated phosphoric acids and 360mL concentrated sulfuric acid magnetic force are added in 500mL three-necked flasks
It stirs evenly.Then 18g potassium permanganate is slowly added portionwise, after being sufficiently stirred reaction, three-necked flask is transferred to oil bath from ice bath
And temperature is risen to 50 DEG C and reacts 12 hours while stirs.
Liquid to be mixed, which is cooled to room temperature, is put into ice-water bath, and 30% hydrogen peroxide is gradually instilled until solution with the dilution of 1L distilled water
Glassy yellow is presented.Vacuum filtration filter cake is rinsed with dilute hydrochloric acid, and 8000rpm is centrifuged 5 minutes, pickling 3 times, removes the sulfuric acid in solution
Radical ion.10000rpm is centrifuged 10 minutes, washes 5 times, pH value of solution is adjusted to neutrality；Vacuum at 60 DEG C of product of centrifugation is obtained to do
It is dry.
Products therefrom is dissolved in the stripping of distilled water ultrasound, vacuum drying chamber drying.
(2) nano zine oxide is prepared
Six acetate hydrate zinc of 4g is weighed respectively and 0.132g citric acids are placed in beaker, adds in 100ml deionized waters, stirring
To whole dissolvings.Above-mentioned pH value of solution is adjusted to 11 with the NaOH of 1mol/L, ultrasonic reaction 0.5h.Mixed liquor after ultrasound is put into water
In thermal response kettle, it is placed in drying box and reacts for 24 hours for 120 DEG C.High speed centrifugation after taking-up is repeatedly clear with absolute ethyl alcohol and deionized water
It washes, final product is dried at room temperature for, obtained particulate matter grind into powder.
(3) dopamine solution is prepared
40mg dopamine hydrochlorides are weighed, adds in the Tris solution of 10mL pH=8.5, stirs evenly.
(4) nano material is compound.
5mg graphene oxides, 7.5mg nano zine oxides are weighed, nano zine oxide is 2 with graphene oxide mass ratio：3,
It adds in 50mL distilled water, ultrasonic disperse 30min.
(5) dopamine solution is added in above-mentioned dispersion liquid, mechanical agitation 12h.
(6) composite filter membrane is prepared.
By the method for vacuum filtration, mixed solution suction filtration is deposited into mixed cellulose ester membrane surface.In 40 DEG C of baking ovens
Middle placement one night drying, comes off certainly, obtains super hydrophilic-underwater superoleophobic without support redox graphene filter membrane.
Tested through water droplet contact angle in air, preparation it is super hydrophilic-underwater superoleophobic without support redox graphene
The contact angle of filter membrane reaches 0 ° or so；Underwater droplets contact angle test, the super hydrophilic-superoleophobic under water of preparation restore without support
The contact angle of graphene oxide filter membrane reaches 154 ° or so, has good underwater superoleophobic property；To contain diesel oil, chloroform, soya-bean oil
Oil emulsion for, oil-containing removal rate is up to 99%.
Compared with embodiment 1,2, nano zine oxide ratio further increases added by this example, and flux is made to get a promotion, but increases
The zinc oxide added slightly influences film forming, and the zinc oxide covered reduces the hydrophilic and oleophobic of partial reduction graphene oxide
Property.Dopamine ratio and reaction time further increase, and enhance adhesion strength between redox graphene and nano zine oxide,
But due to dopamine self-polymeric reaction, nanochannel is filled, its gap is made to become smaller, flux is slightly influenced.
The embodiment is the preferred embodiments of the present invention, but present invention is not limited to the embodiments described above, not
Away from the present invention substantive content in the case of, those skilled in the art can make it is any it is conspicuously improved, replace
Or modification all belongs to the scope of protection of the present invention.
Claims (9)
1. a kind of super hydrophilic-superoleophobic redox graphene filter membrane, which is characterized in that prepare with the following method：First,
Graphene oxide, nano zine oxide are added in distilled water, ultrasonic disperse；It is molten to add the dopamine containing dopamine hydrochloride
Liquid, mechanical agitation；Then by the method for vacuum filtration, mixed solution suction filtration is deposited into mixed cellulose ester membrane surface, is dried
It is dry to obtain the final product described super hydrophilic-underwater superoleophobic without support redox graphene filter membrane from coming off.
A kind of 2. super hydrophilic-superoleophobic redox graphene filter membrane as described in claim 1, which is characterized in that DOPA
Amine while redox graphene, is reacted as excellent reducing agent and auto polymerization end-capping reagent by simple auto polymerization
Bionical poly-dopamine film is formd in graphene oxide and nano-zinc oxide compound surface, which not only has good
Good adhesiveness can be used as crosslinking agent, nano material be made tightly to combine, simultaneously as poly-dopamine is existing hydrophilic in itself
Group makes the nanocomposite of preparation be endowed super hydrophilic and underwater superoleophobic property, and mixed liquor suction filtration deposits to miillpore filter
Surface, coming off certainly after dry, it is described super hydrophilic-underwater superoleophobic without support redox graphene filter membrane to be formed.
3. a kind of super hydrophilic-superoleophobic redox graphene filter membrane as described in claim 1, which is characterized in that described
Mixed cellulose ester membrane of the miillpore filter for 0.22 μm of aperture.
A kind of 4. super hydrophilic-superoleophobic redox graphene filter membrane as described in claim 1, which is characterized in that oxidation
The mass ratio of graphene and nano zine oxide is 2：1~3；The mass ratio of graphene oxide and dopamine hydrochloride is 1:2~8.
A kind of 5. super hydrophilic-superoleophobic redox graphene filter membrane as described in claim 1, which is characterized in that ultrasound
Jitter time is 20-60min.
6. a kind of super hydrophilic-superoleophobic redox graphene filter membrane as described in claim 1, which is characterized in that described
The preparation method of dopamine solution：Dopamine hydrochloride is added in Tris buffer solutions, it is molten that dopamine is obtained after mechanical agitation
Liquid.
7. a kind of super hydrophilic-superoleophobic redox graphene filter membrane as claimed in claim 6, which is characterized in that described
The mass volume ratio of dopamine hydrochloride and Tris buffer solutions is：10-40mg：10mL；The Tris buffer concentrations are 0.1-
1M, pH value 8.5；The churned mechanically time is 12-24h.
A kind of 8. super hydrophilic-superoleophobic redox graphene filter membrane as claimed in claim 4, which is characterized in that oxidation
The mass ratio of graphene and nano zine oxide is 2：2；The mass ratio of graphene oxide and dopamine hydrochloride is 1:4.
9. a kind of purposes of super hydrophilic-superoleophobic redox graphene filter membrane as described in claim 1, for grease point
From.
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| CN112755790A (en) * | 2021-01-15 | 2021-05-07 | 无锡东恒新能源科技有限公司 | Preparation method of graphene oxide-based ultrafiltration membrane |
| CN113262645A (en) * | 2021-05-14 | 2021-08-17 | 江南大学 | Self-cleaning composite ultrafiltration membrane and preparation method thereof |
| CN113737525A (en) * | 2021-09-24 | 2021-12-03 | 中国计量大学 | Preparation method of novel combined capillary force oil-water separation non-woven fabric |
| CN114042384A (en) * | 2021-11-19 | 2022-02-15 | 泰州九润环保科技有限公司 | Electrocatalytic hydrophilic/hydrophobic/hydrophilic sandwich structure conductive distillation membrane and preparation method thereof |
| CN114042384B (en) * | 2021-11-19 | 2023-01-13 | 上海凯贤流体科技有限公司 | Electrocatalytic hydrophilic/hydrophobic/hydrophilic sandwich structure conductive distillation membrane and preparation method thereof |
| CN115975479A (en) * | 2023-01-06 | 2023-04-18 | 东北石油大学 | Method for preparing durable underwater super-oleophobic coating by phase separation method |
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Application publication date: 20180615 |