CN106861657B - Double sponge adsorbed films of redox graphene-polyurethane and its preparation method and application - Google Patents
Double sponge adsorbed films of redox graphene-polyurethane and its preparation method and application Download PDFInfo
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- CN106861657B CN106861657B CN201710169836.8A CN201710169836A CN106861657B CN 106861657 B CN106861657 B CN 106861657B CN 201710169836 A CN201710169836 A CN 201710169836A CN 106861657 B CN106861657 B CN 106861657B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
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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
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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
- C02F2101/30—Organic compounds
- C02F2101/305—Endocrine disruptive agents
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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
- C02F2101/30—Organic compounds
- C02F2101/306—Pesticides
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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
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
Abstract
The invention discloses double sponge adsorbed films of a kind of redox graphene-polyurethane and its preparation method and application, the double sponge adsorbed films of redox graphene-polyurethane include redox graphene cavernous body and polyurethane hot pressing sponge membrane, the redox graphene cavernous body be uniformly filled in the hole of polyurethane hot pressing sponge membrane and with polyurethane hot pressing sponge membrane physical bond.Preparation method includes the following steps: (1) graphene oxide-polyurethane sponge dispersion liquid preparation；(2) it is freeze-dried；(3) hot pressing forms a film.The double sponge adsorbed films of the redox graphene-polyurethane have many advantages, such as absorption property is good, in removal water body pollutant it is high-efficient, can large scale preparation and Yi Huishou and can Reusability, it is the preparation method simple process, at low cost, be expected to realization industrialized production.
Description
Technical field
The invention belongs to technical field of membrane separation more particularly to a kind of double sponge absorption of redox graphene-polyurethane
Film and its preparation method and application.
Background technique
The improvement of the pollutants such as dyes, heavy metal, antibiotic, greasy dirt and benzene series organic matter has become social wide
General focus of attention.These pollutants bring huge harm to human production life, health and surrounding ecological environment.Mesh
Before, the method for effectively administering these pollutants mainly has the modes such as absorption method, hyperfiltration, flocculent precipitation, wherein absorption method
It is at present the rate of adsorption with higher, the advantages that adsorption effect is good used as extensive sewage treatmentmethod.And have
High-specific surface area, strong adsorption effect high-performance adsorbent material be at present absorption research field in main direction of studying.Its
In, spongiform grapheme material is a kind of new and effective adsorbent, because it is with large specific surface area, adsorption effect well equal spies
Point, right and wrong are often with potential novel absorption material.But its bad mechanical property, it is especially difficult to keep under the conditions of large scale
Original structure, therefore range is greatly limited their application, another shortcoming is that spongiform grapheme material is being inhaled
It is easy to be deposited in water body after attached saturation toxic pollutant, sludge is caused largely to store, be difficult to recycle, be easy to cause water body
Secondary pollution.It would therefore be highly desirable to research and develop with high absorption capacity, can be prepared with large scale and effectively can have high inhale by Reusability
The New Environment Protection Technology of attached performance.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide that a kind of absorption property is good, goes to remove water
In body pollutant it is high-efficient, can large scale preparation and the double seas of Yi Huishou and repeatedly used redox graphene-polyurethane
Continuous adsorbed film correspondingly provides the double sponge adsorbed films of a kind of simple process, above-mentioned redox graphene-polyurethane at low cost
Preparation method correspondingly also provide a kind of double sponge adsorbed films of above-mentioned redox graphene-polyurethane in adsorbed water body
Application in middle pollutant.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of double sponge adsorbed films of redox graphene-polyurethane, including redox graphene cavernous body and poly- ammonia
Ester hot pressing sponge membrane, the redox graphene cavernous body be uniformly filled in the hole of polyurethane hot pressing sponge membrane and with it is poly-
Urethane hot pressing sponge membrane physical bond.
The double sponge adsorbed films of above-mentioned redox graphene-polyurethane, it is preferred that the redox graphene-is poly-
The double sponge adsorbed films of urethane with a thickness of 1mm~5mm.
The inventive concept total as one, the present invention also provides a kind of double sponge absorption of redox graphene-polyurethane
The preparation method of film, comprising the following steps:
(1) polyurethane sponge body is added in the dispersion liquid of graphene oxide, makes graphene oxide under ultrasound condition
It enters in the hole of polyurethane sponge body, obtains graphene oxide-polyurethane sponge dispersion liquid；
(2) the resulting graphene oxide of step (1)-polyurethane sponge dispersion liquid is freeze-dried, makes to aoxidize stone
Black alkene forms graphene oxide cavernous body, obtains the double sponge complexs of graphene oxide-polyurethane；
(3) the double sponge complexs of the resulting graphene oxide-polyurethane of step (2) are subjected to hot pressing, make polyurethane sponge
Bodily form generating polyurethane hot pressing sponge membrane, and graphene oxide cavernous body is made to be reduced to redox graphene cavernous body, it is gone back
The double sponge adsorbed films of former graphene oxide-polyurethane.
The preparation method of the double sponge adsorbed films of above-mentioned redox graphene-polyurethane, it is preferred that the step (1)
In, in the dispersion liquid of the graphene oxide, decentralized medium is water, and the concentration of graphene oxide is 2mg/L~20mg/L.
It is furthermore preferred that the surface of graphene oxide is coated with surfactant, surfactant includes silane coupling agent, ten
One or more of six sodium alkyl sulfonates, Dodecydimethylammonium bronides.
Wherein, graphene oxide can also be replaced using modified graphene oxide, modified graphene oxide includes ammonia
Base graphene oxide, sulfonated graphene oxide or it is coupling agent modified after Graphene derivative.
Preferably, in the step (1), the polyurethane sponge body includes that polyether polyurethane foaming body, polyester-type are poly-
Urethane foaming body or composite foamed body containing polyurethane.
Preferably, in the step (1), the dispersion liquid preparation of graphene oxide can use following methods but not limit to:
Take 0.5.~5.0g natural flake graphite powder and 1.0~3.0g sodium nitrate be slowly added into pre-cooling after 46~
In the concentrated sulfuric acid of 120mL, mixed liquor A is obtained；Mixed liquor A is placed in 30~60min of stirring under condition of ice bath；Weighing total amount is
6.0~15.0g potassium permanganate point, 10 additions are above-mentioned by mixed liquor A, and during which system temperature stirs not higher than 5 DEG C and quickly 2
~5h, obtains mixed liquid B；Mixed liquid B is moved into 35 DEG C of tepidariums and continues 3~10h of stirring, obtains reaction solution；It is slowly added dropwise 90
~150mL distilled water controls temperature at 90 DEG C or so in reaction solution, keeps 30min~1h.It is cooled to room temperature, is mixed
Close liquid C；30% hydrogen peroxide is added in mixed liquor C and removes excessive oxidant, until mixed liquor C becomes glassy yellow.It is added
150~500mL distilled water is diluted and is filtered while hot, obtains thick filtrate, successively using the hydrochloric acid of 0.01mol/L, anhydrous second
The multiple centrifuge washing of alcohol, deionized water will be obtained until sulfate radical-free ion (with barium chloride detection without precipitating) solution in filtrate
Thick (pH about 6.5) graphite oxide solution be diluted to 1mg/mL, using 30~60 min of ultrasonic cell disruptor ultrasound,
It is centrifuged 20 minutes under the speed for being respectively 4500 and 8000 revs/min with revolving speed by the dispersion liquid, removes impurities at bottom, aoxidized
The higher graphene oxide dispersion of degree.
Preferably, further include the pre-treatment of polyurethane sponge body in the step (1):: polyurethane sponge body is successively third
It is ultrasonically treated in ketone, ethyl alcohol and deionized water, handles 1~3h, respectively to remove surface small-molecule substance and grease；It is placed in 60 again
The drying of DEG C vacuum oven.
The preparation method of the double sponge adsorbed films of above-mentioned redox graphene-polyurethane, it is preferred that the step (2)
In, the temperature of the freeze-drying is -50 DEG C~-10 DEG C, and pressure is 2Pa~30Pa, and the time is 12 h~48h.
The preparation method of the double sponge adsorbed films of above-mentioned redox graphene-polyurethane, it is preferred that the step (3)
In, the temperature of the hot pressing is 180 DEG C~200 DEG C, and the time is 0.5h~3h.
Preferably, in the step (3), the double sponge adsorbed films of the redox graphene-polyurethane with a thickness of oxygen
The 1/30~1/10 of the double sponge composite thickness of graphite alkene-polyurethane.
The inventive concept total as one, the present invention also provides a kind of double seas of above-mentioned redox graphene-polyurethane
Oxygen reduction fossil prepared by the preparation method of continuous adsorbed film or the double sponge adsorbed films of above-mentioned redox graphene-polyurethane
Double applications of the sponge adsorbed film in adsorbed water body in pollutant of black alkene-polyurethane.
Preferably, the application includes hydrophilic dye, hydrophobicity dyestuff, heavy metal, antibiotic, hydrophobic pesticidal etc.
Remove Adsorption.
Compared with the prior art, the advantages of the present invention are as follows:
1, the double sponge adsorbed films of redox graphene-polyurethane of the invention, by means of large-sized polyurethane hot pressing
Redox graphene cavernous body is uniformly filled in the hole of polyurethane hot pressing sponge membrane and therewith by sponge membrane as carrier
Physical bond, redox graphene cavernous body are not easy to scatter, and dexterously solve the molding of graphene sponge difficulty, should not prepare greatly
The problems such as difficult to recycle after size, absorption pollutant.The double sponge adsorbed films of the redox graphene-polyurethane, which have, to be gone
Except pollutant is high-efficient, absorption property is good in water body, can large scale preparation and Yi Huishou and can Reusability the advantages that.
2, the preparation method of the double sponge adsorbed films of redox graphene-polyurethane of the invention, utilizes infiltration-freeze-drying-
Hot compression technique, first passing through infiltration enters graphene oxide in the hole of polyurethane sponge, then makes to aoxidize stone by freeze-drying
Black alkene forms graphene oxide cavernous body, makes the same of polyurethane sponge bodily form generating polyurethane hot pressing sponge membrane finally by hot pressing
When, so that its intrapore graphene oxide cavernous body is reduced to redox graphene cavernous body, obtains redox graphene-
The double sponge adsorbed films of polyurethane, after hot pressing, redox graphene sponge forms in the hole of polyurethane, with polyurethane
Pore wall physical bond, be not easy to scatter, in addition, graphene oxide during thermal reduction, carries out self assembly between lamella,
Redox graphene sponge block is formed in the gap of polyurethane sponge, the graphene sponge body of this reduction-state has than table
The advantages such as area is big, strong adsorption and being stabilized in water body is not dissolved.The preparation method simple process is gathered simultaneously
Urethane sponge is cheap, while also having both certain absorption property, and easily hot pressing film forming, dexterously solves graphene sponge hardly possible
The problems such as forming, large scale should not be prepared, is difficult to recycle.The double sponges of prepared redox graphene-polyurethane inhale
Membrane has many advantages, such as that pollutant is high-efficient, absorption property is good in removal water body, can large scale preparation and Reusability.
Detailed description of the invention
Fig. 1 is the preparation flow figure of the double sponge adsorbed films of redox graphene-polyurethane of the embodiment of the present invention 1.
Fig. 2 is the photomacrograph of the double sponge adsorbed films of redox graphene-polyurethane of the embodiment of the present invention 1.
Fig. 3 is the SEM photograph of the double sponge adsorbed films of redox graphene-polyurethane of the embodiment of the present invention 1, wherein
(b) figure is the partial enlarged view of (a) figure.
Fig. 4 is the absorption dress for being equipped with the double sponge adsorbed films of redox graphene-polyurethane of the embodiment of the present invention 1
It sets.
Fig. 5 is double absorption of the sponge adsorbed film to different dyes of redox graphene-polyurethane manufactured in the present embodiment
Performance test test chart.
Specific embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
It limits the scope of the invention.
Embodiment 1:
A kind of double sponge adsorbed films of redox graphene-polyurethane of the invention, including redox graphene sponge
Body and polyurethane hot pressing sponge membrane, the redox graphene cavernous body are uniformly filled in the hole of polyurethane hot pressing sponge membrane
And with polyurethane hot pressing sponge membrane physical bond.
In the present embodiment, the double sponge adsorbed films of redox graphene-polyurethane with a thickness of 1mm.
A kind of preparation method of the double sponge adsorbed films of the redox graphene-polyurethane of the present embodiment, as shown in Figure 1,
It is realized by following steps:
(1) graphene oxide-polyurethane sponge dispersion liquid preparation:
(1.1) in the concentrated sulfuric acid for the 90ml for taking 5.0g natural flake graphite powder and 2.5g sodium nitrate to be slowly added into pre-cooling,
Obtain mixed liquor A；Mixed liquor A is placed under condition of ice bath and stirs 60min.Weigh 10 additions of total amount 15.0g potassium permanganate point
In above-mentioned mixed liquor A, temperature quickly stirs 2h not higher than 5 DEG C, obtains mixed liquid B.Mixed liquid B is moved into 35 DEG C of tepidariums and is continued
6h is stirred, reaction solution is obtained.150mL distilled water is slowly added dropwise in gained reaction solution, and controls temperature at 90 DEG C or so, keeps
1h.It is cooled to room temperature, obtains mixed liquor C；30% hydrogen peroxide is added in mixed liquor C and removes excessive oxidant, until mixed liquor
Until C becomes glassy yellow.500mL distilled water is added to dilute and filter while hot, obtains filtrate, successively uses the salt of 0.01mol/L
The multiple centrifuge washing of acid, dehydrated alcohol, deionized water is molten until sulfate radical-free ion in filtrate (with barium chloride detection without precipitating)
The graphite oxide solution of obtained thick (pH about 6.5) is diluted to 1mg/mL by liquid, uses ultrasonic cell disruptor ultrasound
60 min, by gained dispersion liquid respectively with revolving speed to be centrifuged 20 minutes under 4500 and 8000 revs/min of speed, removal bottom is miscellaneous
Matter obtains the higher graphene oxide dispersion of degree of oxidation.
(1.2) taking volume (length × width × height) is that 2cm × 2cm × 1cm polyurethane sponge successively in acetone, ethyl alcohol and is gone
1h is ultrasonically treated in ionized water respectively, 60 DEG C of vacuum oven drying are placed in, for removing surface small-molecule substance and grease.
(1.3) graphene oxide ultrasonic disperse Yu Shuizhong made from step (1.1) is configured to the oxidation that concentration is 5mg/L
The polyurethane sponge body cleaned through step (1.2) surface is added in the dispersion liquid of graphene oxide by graphene dispersing solution, after
During which continuous ultrasound 1h repeatedly extrudes the minute bubbles in cavernous body removal hole, make graphene oxide well into arriving polyurethane sponge
In the hole of body, graphene oxide-polyurethane sponge dispersion liquid is obtained.
(2) it is freeze-dried
By the resulting graphene oxide of step (1)-polyurethane sponge dispersion liquid into capable freeze-drying is vacuumized, freezing is dry
The dry time is that for 24 hours, temperature is -50 DEG C, and pressure is 3 Pa, so that graphene oxide is formed graphene oxide cavernous body, will be covered on
The extra graphene oxide cavernous body on polyurethane sponge surface carefully removes, and obtains the double seas of graphene oxide-polyurethane of brown
Continuous complex.
(3) hot pressing forms a film
The double sponge complexs of the resulting graphene oxide-polyurethane of step (2) are subjected to hot pressing, specially at 180 DEG C
It is compressed and is formed a film with hot press under high temperature, hot pressing time 1h makes polyurethane sponge bodily form generating polyurethane hot pressing sponge membrane, and makes oxygen
Graphite alkene cavernous body is reduced to redox graphene cavernous body, obtains redox graphene-polyurethane with a thickness of 1mm
Double sponge adsorbed films, as shown in Figure 2.
Fig. 3 is the SEM photograph of the double sponge adsorbed films of redox graphene-polyurethane manufactured in the present embodiment, by (a) figure
It is found that redox graphene cavernous body is uniformly filled in the hole of polyurethane hot pressing sponge membrane；(b) figure is the double seas of polyurethane
The enlarged drawing of redox graphene cavernous body in continuous adsorbed film, it can be seen from the figure that the reduction prepared by the technique
Mutually overlap joint assembling forms redox graphene cavernous body with uniform porous structure, aperture between graphene oxide layer
About 10 microns of size.The structure has many advantages, such as that adsorption capacity is big, the rate of adsorption is fast to the pollutant in water body.
The double sponge adsorbed films of redox graphene-polyurethane manufactured in the present embodiment are applied to going for waste water from dyestuff
It removes:
Compound concentration is methylene blue solution, Congo red solution, methyl orange solution and the rhodamine B solution of 10mg/L respectively
Each 20 mL is as target waste water from dyestuff.Using the double sponge adsorbed films of the redox graphene-polyurethane of the present embodiment as absorption
Film is installed in adsorbent equipment shown in Fig. 4.It is pressurizeed using peristaltic pump, target waste water from dyestuff is slow transitted through into the film, most
After obtain the filtered water body of film.It is carried out using target dye strength of the ultraviolet-visible optical tester to the filtered water body of film
Measurement, as a result as shown in figure 5, Fig. 5 (a) is the absorption property test curve of methylene blue, Fig. 5 (b) is Congo red adsorptivity
Energy test curve, Fig. 5 (c) are the absorption property test curve of methyl orange, and Fig. 5 (d) is that the absorption property of rhodamine B tests song
Line, as seen from the figure, the removal rate of above-mentioned four kinds of dyestuffs are respectively 81.18%, 91.23%, 80.42% and 92.78%, explanation
The composite membrane has excellent adsorption separation performance to dyestuff.
Film flushing process: using organic solvents such as acetone or alcohols to the poly- ammonia of redox graphene-of absorption pollutant
The double sponge adsorbed films of ester impregnate repeatedly, can effectively remove the dyestuff being adsorbed in film, the reduction-oxidation after removal absorption dyestuff
The double sponge adsorbed films of graphene-polyurethane can continue on for the purification of waste water from dyestuff.The above is only preferred reality of the invention
Mode is applied, protection scope of the present invention is not limited merely to above-described embodiment.All technical solutions belonged under thinking of the present invention are equal
It belongs to the scope of protection of the present invention.It is noted that for those skilled in the art, not departing from the present invention
Improvements and modifications under the premise of principle, these modifications and embellishments should also be considered as the scope of protection of the present invention.
Claims (6)
1. a kind of double sponge adsorbed films of redox graphene-polyurethane, which is characterized in that including redox graphene sponge
Body and polyurethane hot pressing sponge membrane, the redox graphene cavernous body are uniformly filled in the hole of polyurethane hot pressing sponge membrane
It is interior and with polyurethane hot pressing sponge membrane physical bond；The double sponge adsorbed films of the redox graphene-polyurethane with a thickness of
1mm~5mm；The preparation method of the double sponge adsorbed films of the redox graphene-polyurethane, comprising the following steps:
(1) polyurethane sponge body is added in the dispersion liquid of graphene oxide, enters graphene oxide under ultrasound condition
Into the hole of polyurethane sponge body, graphene oxide-polyurethane sponge dispersion liquid is obtained；
(2) the resulting graphene oxide of step (1)-polyurethane sponge dispersion liquid is freeze-dried, makes graphene oxide
Graphene oxide cavernous body is formed, the double sponge complexs of graphene oxide-polyurethane are obtained；The temperature of the freeze-drying be-
50 DEG C~-10 DEG C, pressure is 2Pa~30Pa, and the time is 12 h~48h；
(3) the double sponge complexs of the resulting graphene oxide-polyurethane of step (2) are subjected to hot pressing, make the polyurethane sponge bodily form
Generating polyurethane hot pressing sponge membrane, and graphene oxide cavernous body is made to be reduced to redox graphene cavernous body, obtain oxygen reduction
The double sponge adsorbed films of graphite alkene-polyurethane；The temperature of the hot pressing is 180 DEG C~200 DEG C, and the time is 0.5h~3h.
2. a kind of preparation method of the double sponge adsorbed films of redox graphene-polyurethane, comprising the following steps:
(1) polyurethane sponge body is added in the dispersion liquid of graphene oxide, enters graphene oxide under ultrasound condition
Into the hole of polyurethane sponge body, graphene oxide-polyurethane sponge dispersion liquid is obtained；
(2) the resulting graphene oxide of step (1)-polyurethane sponge dispersion liquid is freeze-dried, makes graphene oxide
Graphene oxide cavernous body is formed, the double sponge complexs of graphene oxide-polyurethane are obtained；The temperature of the freeze-drying be-
50 DEG C~-10 DEG C, pressure is 2Pa~30Pa, and the time is 12 h~48h；
(3) the double sponge complexs of the resulting graphene oxide-polyurethane of step (2) are subjected to hot pressing, make the polyurethane sponge bodily form
Generating polyurethane hot pressing sponge membrane, and graphene oxide cavernous body is made to be reduced to redox graphene cavernous body, obtain oxygen reduction
The double sponge adsorbed films of graphite alkene-polyurethane；The temperature of the hot pressing is 180 DEG C~200 DEG C, and the time is 0.5h~3h.
3. the preparation method of the double sponge adsorbed films of redox graphene-polyurethane according to claim 2, feature exist
In in the step (1), in the dispersion liquid of the graphene oxide, decentralized medium is water, and the concentration of graphene oxide is 2mg/
L~20mg/L.
4. the preparation method of the double sponge adsorbed films of redox graphene-polyurethane according to claim 3, feature exist
Be coated with surfactant in, the surface of graphene oxide, surfactant include silane coupling agent, sodium cetanesulfonate,
One or more of Dodecydimethylammonium bronides.
5. the preparation method of the double sponge adsorbed films of redox graphene-polyurethane according to claim 2, feature exist
In, in the step (1), the polyurethane sponge body include polyether polyurethane foaming body, polyester polyurethane foaming body or
Composite foamed body containing polyurethane.
6. a kind of double sponge adsorbed films of redox graphene-polyurethane as described in claim 1 or such as claim 2~5
Reduction-oxidation graphite prepared by the preparation method of the double sponge adsorbed films of described in any item redox graphene-polyurethane
Double applications of the sponge adsorbed film in adsorbed water body in pollutant of alkene-polyurethane.
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| CN109621906B (en) * | 2018-12-15 | 2021-09-03 | 同济大学 | Method for preparing composite sponge capable of absorbing viscous crude oil |
| CN110237830A (en) * | 2019-06-19 | 2019-09-17 | 南京林业大学 | A kind of mild preparation method of environmental protection of hydrophobic oleophilic oil sponge |
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| CN114190947A (en) * | 2021-12-09 | 2022-03-18 | 上海交通大学 | Non-invasive electroencephalogram sensor based on flexible substrate and preparation method thereof |
| CN115490335A (en) * | 2022-09-19 | 2022-12-20 | 四川鑫启伟环保科技有限公司 | Graphene-based water body in-situ purification method |
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