CN114539604A - Magnetic super-hydrophobic composite material and preparation method and application thereof - Google Patents
Magnetic super-hydrophobic composite material and preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses a magnetic super-hydrophobic composite material and a preparation method and application thereof. The preparation method of the magnetic super-hydrophobic composite material comprises the following steps: (1) FeCl is added under nitrogen atmosphere3.6H2O、FeCl2.4H2Dispersing O and alkali in water, stirring for reaction, washing and drying to obtain Fe3O4A nanoparticle; (2) mixing the Fe obtained in the step (1)3O4Dispersing the nano particles and the matrix material in an alkaline ethanol solution, adding dodecyl triethoxysilane, stirring for reaction, washing, and drying to obtain the magnetic super-hydrophobic composite material. The preparation method of the magnetic super-hydrophobic composite material is simple, has no harsh reaction conditions, is environment-friendly and has wide raw material sources; the prepared magnetic super-hydrophobic composite material has good magnetic driving hydrophobic property, achieves self-cleaning, anti-fouling and deicing effects in natural environment, can be widely applied to the field of oil-water separation, and has stable performance.
Description
Technical Field
The invention relates to the field of high polymer materials, in particular to a magnetic super-hydrophobic composite material and a preparation method and application thereof.
Background
In recent years, inspired by a series of super-hydrophobic surfaces and phenomena such as the lotus effect, the artificial super-hydrophobic material is widely applied to the fields of biological fouling resistance, anti-icing, self-cleaning, drag reduction and the like. The coordination of appropriate micro/nano-scale structures and low surface energy modifiers is the basic way to build superhydrophobic surfaces, and based on the above theory, the current technical methods for building rough surface structures typically include photolithography, chemical etching, hydrothermal reaction, sol-gel method and electrochemical deposition, followed by surface modification using low surface energy molecules. However, most of these techniques require complex equipment, time consuming processes and expensive low surface energy modifiers, limiting the large scale application of superhydrophobic surfaces. The super-hydrophobic material often shows extremely high lipophilicity, and provides a foundation for treating oil substance water pollution; the introduction of magnetism provides another function for the composite material, namely magnetic driving, and provides basis for the directional movement of the composite material. The invention provides a magnetic super-hydrophobic composite material which is environment-friendly, low in price, directionally driven, stable in performance and simple in process, aiming at improving the adsorption performance of a super-hydrophobic surface.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a preparation method of a magnetic super-hydrophobic composite material.
The invention also aims to provide the magnetic super-hydrophobic composite material obtained by the preparation method.
The invention further aims to provide application of the magnetic super-hydrophobic composite material.
The purpose of the invention is realized by the following technical scheme: a preparation method of a magnetic super-hydrophobic composite material comprises the following steps:
(1) preparation of Fe3O4Nanoparticles
FeCl is added under nitrogen atmosphere3.6H2O、FeCl2.4H2Dispersing O and alkali in water, stirring for reaction,
washing and drying to obtain Fe3O4A nanoparticle;
(2) preparation of magnetic super-hydrophobic composite material
Mixing the Fe obtained in the step (1)3O4Dispersing the nano particles and the matrix material in an alkaline ethanol solution, mixing, adding siloxane, stirring for reaction, washing, and drying to obtain the magnetic super-hydrophobic composite material.
The FeCl in the step (1)3.6H2O and said FeCl2.4H2The mass ratio of O is (1-4): (1-4); preferably, the mass ratio is 2: 1;
the water in the step (1) is redistilled water.
The alkali in the step (1) is one or more than two of NaOH solution, ammonia water and KOH solution; preferably aqueous ammonia.
The concentration of the ammonia water is 25-30% by mass; preferably 28% by mass.
The concentration of the NaOH solution and the KOH solution is preferably 1 mol/L.
In the step (1), the volume ratio of the alkali to the water is (0.5-2): (8-24) calculating the mixture ratio; preferably in a volume ratio of 1: and (5) calculating the mixture ratio of 12.
Stirring reaction in the step (1) is carried out for 10-40 min at the temperature of 10-50 ℃ and at the rpm of 150-550 rpm; preferably, the mixture is stirred at 350rpm for 10min at 40 ℃.
In the step (1), deionized water and absolute ethyl alcohol are adopted for washing until the washing is neutral.
In the step (1), the drying is vacuum drying to constant weight.
The temperature of the vacuum drying is 25-70 ℃; preferably 60 deg.c.
The siloxane in step (2) and the Fe in step (1)3O4The dosage ratio of the nanoparticles is 8-12 mL: 3-7 g; preferably 10 mL: 5g of the total weight.
In the step (2), the siloxane is preferably one or more of dodecyl triethoxysilane, methyl triethoxysilane, dimethyl diethoxy silane and hexadecyl triethoxysilane.
The alkaline ethanol solution in the step (2) is obtained by adding an alkaline solution into an ethanol solution, wherein the alkaline solution is preferably one or more than two of a NaOH solution, ammonia water and a KOH solution; preferably aqueous ammonia.
The volume ratio of the ethanol solution to the alkali solution is preferably 90: 4.
in the ethanol solution in the step (2), the volume ratio of ethanol to water is (10-100): (1-20); preferably, the volume ratio is (80-90): (10-20); more preferably, the volume ratio is 90: 10.
the water is deionized water.
When the aqueous alkali is added, the concentration of the aqueous ammonia is 25-30% by mass; preferably 28% by mass.
When the alkali solution is added into NaOH solution or KOH solution, the concentration of NaOH and KOH is 1 mol/L.
In the step (2), the base material is one or two of cotton cloth or melamine sponge.
In the step (2), the matrix material is pretreated before reaction, and the pretreatment method comprises the following steps: extracting with mixed solution of ethanol and acetone at any ratio for 10 hr, and vacuum drying at 60 deg.C for 24 hr.
The mixing condition in the step (2) is that the mixture is stirred for 10-40 min at 150-550 rpm under the condition of 10-50 ℃; preferably, the mixture is stirred at 350rpm for 10min at 40 ℃.
The stirring reaction condition in the step (2) is that the reaction is carried out for 3-7 h at 10-50 ℃ at the rotating speed of 350 rpm; preferably 40 ℃ for 5 h.
And (3) washing in the step (2) is to be neutral by adopting deionized water and absolute ethyl alcohol.
The drying in the step (2) is vacuum drying to constant weight.
The temperature of the vacuum drying is 25-70 ℃; preferably 60 deg.c.
A magnetic super-hydrophobic composite material is prepared by the preparation method.
The magnetic super-hydrophobic composite material is applied to oil-water separation.
Compared with the prior art, the invention has the following advantages and effects:
(1) the magnetic super-hydrophobic composite material prepared by the invention has good magnetic drive hydrophobic property, achieves the effects of self-cleaning, antifouling and deicing in natural environment, can realize wide application in the field of oil-water separation, and has stable property.
(2) The preparation method of the magnetic super-hydrophobic composite material is simple, has no harsh reaction conditions, is environment-friendly and has wide raw material sources.
Drawings
FIG. 1 is an Infrared (IR) spectrum of the magnetic superhydrophobic composite material prepared in example 1.
FIG. 2 is a flow chart of water contact angle measurement of the magnetic superhydrophobic composite prepared in example 1; wherein, a is the contact process of the water drop and the super-hydrophobic composite material, b is the further downward pressing of the water drop, c is the upward lifting water drop, and d is the water drop still remained on the sample injection needle after the continuous lifting.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto. Those who do not specify the conditions are performed according to the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
(1)Fe3O4And (3) synthesis of nanoparticles: 13.33g of FeCl were added to a four-necked flask under a nitrogen atmosphere3.6H2O and 6.67g FeCl2.4H2And O, fully dissolving the mixture in 150mL of secondary water, adding 12.5mL of 28 mass percent ammonia water, reacting for 30min at 40 ℃ and 350rpm, and removing nitrogen to obtain black liquid. Centrifuging, washing with deionized water for three times, and drying in a vacuum oven at 60 deg.C to constant weight to obtain 14.8g Fe3O4And (3) nanoparticles.
(2) Synthesis of the magnetic super-hydrophobic composite material: weighing 5.0g of Fe prepared in step (1)3O4Adding the nano-particles into a flask, adding matrix material melamine sponge (firstly extracting and treating by a mixed solution of ethanol and acetone with a volume ratio of 2:1 for 10h, and drying in vacuum at 60 ℃ for 24h), ultrasonically dispersing in an alkaline ethanol solution (90% ethanol solution is mixed with 28% ammonia water by mass according to a volume ratio of 90: 4), and stirring at 350rpm for 10min at 40 ℃. Then 10mL of dodecyl triethoxy silane (DTES for short) is added, the mixture reacts for 5h at the stirring speed of 350rpm and the temperature of 40 ℃, and then the mixture is washed to be neutral by deionized water and dried in vacuum, thus obtaining the magnetic super-hydrophobic composite material.
The infrared test result of the magnetic super-hydrophobic composite material prepared in this example 1 is shown in fig. 1, which indicates that the composite material has been successfully synthesized.
Example 2
(1)Fe3O4And (3) synthesis of nanoparticles: 13.3g of FeCl were added to a four-necked flask under a nitrogen atmosphere3.6H2O and6.67g of FeCl2.4H2And O, fully dissolving the mixture in 180mL of secondary water, adding 15mL of 25% ammonia water by mass, reacting at 40 ℃ and 150rpm for 40min, and removing nitrogen to obtain black liquid. Centrifuging, washing with deionized water for three times, and drying in a vacuum oven at 25 deg.C to constant weight to obtain Fe3O4And (3) nanoparticles.
(2) Synthesis of the magnetic super-hydrophobic composite material: 3.0g of Fe prepared in step (1) was weighed3O4Adding the nano particles into a flask, adding a matrix material (firstly extracting for 10 hours by using a mixed solution of ethanol and acetone with the volume ratio of 2:1, drying for 24 hours in vacuum at 60 ℃), ultrasonically dispersing in an alkaline ethanol solution (mixing a 90% ethanol solution and 28% ammonia water by mass according to the volume ratio of 90: 4), and stirring for 10 minutes at 350rpm at 40 ℃. And adding 8mL of dodecyl triethoxysilane, reacting for 3h at the stirring speed of 350rpm, washing with deionized water to be neutral, and drying in vacuum to obtain the magnetic super-hydrophobic composite material.
Example 3
(1)Fe3O4And (3) synthesis of nanoparticles: 13.3g of FeCl were added to a four-necked flask under a nitrogen atmosphere3.6H2O and 6.67g FeCl2.4H2And O, fully dissolving the mixture in 60mL of secondary water, adding 7.5mL of ammonia water with the mass fraction of 30%, reacting for 10min at 40 ℃ and 550rpm, and removing nitrogen to obtain black liquid. Centrifuging, washing with deionized water for three times, and drying in a vacuum oven at 70 deg.C to constant weight to obtain Fe3O4And (3) nanoparticles.
(2) Synthesis of the magnetic super-hydrophobic composite material: weighing 7.0g of Fe prepared in step (1)3O4Adding the nano particles into a flask, adding a matrix material (firstly extracting for 10 hours by using a mixed solution of ethanol and acetone with the volume ratio of 2:1, drying for 24 hours in vacuum at 60 ℃), ultrasonically dispersing in an alkaline ethanol solution (mixing a 90% ethanol solution and 28% ammonia water by mass according to the volume ratio of 90: 4), and stirring for 10 minutes at 350rpm at 40 ℃. Adding 12mL of dodecyl triethoxy silane, reacting for 7h at the stirring speed of 350rpm, and washing with deionized water untilAnd (5) neutralizing, and drying in vacuum to obtain the magnetic super-hydrophobic composite material.
Example 4
FeCl in step (1) of example 1 was added separately3.6H2O、FeCl2.4H2Changing the mass ratio of O into 1: 1. 1: 2. 1: 3. 1: 4. 2: 3. 3: 2 (fixed FeCl)3.6H2O and FeCl2.4H2Total mass of O20 g) under nitrogen atmosphere, FeCl was added in a corresponding amount to a four-necked flask3.6H2O and FeCl2.4H2And O, fully dissolving in 150mL of secondary water, adding 12.5mL of 28 mass percent ammonia water, and reacting for 30min at 40 ℃ and 350 rpm. The subsequent steps were the same as in example 1. When FeCl is added3.6H2O、FeCl2.4H2The molar ratio of O is 1: 1. 1: 2. 1: 3. 1: 4. 2: 1. 2: 3. 3: and 2 hours. Fe3O4The yield of the nanoparticles is 6.8g, 7.0g, 7.2g, 7.1g, 12.7g and 13.0g respectively. The mass ratio is 2: example 1 was the most effective at 1, with a yield of 14.8 g.
Example 5
The rotation speeds of the reactions in step (1) of example 1 were changed to 550rpm, 450rpm, 250rpm, and 150rpm, respectively. Adding a certain amount of FeCl into a four-neck flask under the nitrogen atmosphere3.6H2O and FeCl2.4H2O (the molar ratio is 2: 1) is fully dissolved in 150mL of secondary water, 12.5mL of ammonia water with the mass fraction of 28 percent is added, and the reaction is carried out for 30min at 40 ℃ and corresponding rotating speed. The subsequent steps were the same as in example 1. Fe when the rotation speed was changed to 550rpm, 450rpm, 250rpm, 150rpm3O4The nanoparticle yields were 11.3g, 12.7g, 13.0g, 10.9 g. Example 1 performed best at 350rpm, with a yield of 14.8 g.
Example 6
The ammonia water used in step (1) of example 1 was changed to 15mL, 10mL, 7.5mL, and 5mL, respectively. Adding a certain amount of FeCl into a four-neck flask under the nitrogen atmosphere3.6H2O and FeCl2.4H2O (molar ratio is 2: 1), fully dissolving in 150mL of secondary water, adding corresponding ammonia water content, and dissolving in 40%The reaction was carried out at 350rpm at 350 ℃ for 30 min. The subsequent steps were the same as in example 1. Fe when ammonia water is 15mL, 10mL, 7.5mL, 5mL3O4The nanoparticle yields were 14.0g, 12.8g, 10.2g, 8.5 g. Example 1 works best when the ammonia amount is 12.5mL, with a yield of 14.8 g.
Example 7
The reaction temperatures in step (1) of example 1 were changed to 50 deg.C, 30 deg.C, 20 deg.C, and 10 deg.C, respectively. Adding a certain amount of FeCl into a four-neck flask under the nitrogen atmosphere3.6H2O and FeCl2.4H2O (molar ratio of 2: 1), fully dissolved in 150mL of secondary water, added with corresponding ammonia content, and reacted at 350rpm for 30min at corresponding temperature. The subsequent steps were the same as in example 1. Fe at 50 deg.C, 30 deg.C, 20 deg.C, 10 deg.C3O4The yield of the nanoparticles is respectively 13.1g, 13.8g, 10.5g and 8.1 g. Example 1 performed best when the reaction temperature was 40 ℃ with a yield of 14.8 g.
Example 8
The amount of redistilled water used in step (1) of example 1 was changed to 180mL, 120mL, 90mL, and 60mL, respectively. Adding a certain amount of FeCl into a four-neck flask under the nitrogen atmosphere3.6H2O and FeCl2.4H2O (molar ratio 2: 1) was sufficiently dissolved in a corresponding amount of redistilled water, and 12.5mL of aqueous ammonia was added to react at 40 ℃ and 350rpm for 30 min. The subsequent steps were the same as in example 1. When the dosage of the redistilled water is changed to 180mL, 120mL, 90mL and 60mL, Fe3O4The yield of the nanoparticles is 13.1g, 13.8g, 13.4g and 12.9g respectively. Example 1 performed best when the amount of redistilled water was 150mL, with a yield of 14.8 g.
Example 9
The amounts of dodecyltriethoxysilane used in step (2) of example 1 were changed to 12mL, 11mL, 9mL, and 8mL, respectively. The procedure was the same as in example 1. Adding corresponding amount of dodecyl triethoxy silane, and reacting for 5 h. The subsequent steps were also the same as in example 1. When the dosage of the dodecyl triethoxy silane is changed to 12mL, 11mL, 9mL and 8mL, the water contact angle is 142 degrees, 145 degrees, 148 degrees and 150 degrees. Example 1 works best when the amount of dodecyltriethoxysilane used is 10mL, and the optimal water contact angle cannot be accurately measured, above 160 °. The water contact angle detection method is a sitting drop method, and measurement is carried out by a water contact angle measuring instrument. The reason cannot be measured: the water drops on the sample injection needle are still remained on the sample injection needle after being contacted and pressed with the prepared magnetic super-hydrophobic material, which shows that the material has extremely high hydrophobicity and is not stained with water at all.
Example 10
Fe in step (2) of example 1 was added separately3O4The dosages of the nanoparticles were changed to 3g, 4g, 6g, and 7g, respectively. The procedure was the same as in example 1. Adding a corresponding amount of Fe3O4Nanoparticles, the subsequent steps are also the same as in example 1. When Fe3O4When the consumption of the nano-particles is 3g, 4g, 6g and 7g, the water contact angles are 138 degrees, 142 degrees, 152 degrees and 149 degrees respectively. When Fe3O4Example 1, with a nanoparticle amount of 5.0g, works best, and the optimal water contact angle cannot be accurately measured, above 160 °.
Example 11
The reaction times in step (2) of example 1 were changed to 3h, 4h, 6h and 7h, respectively. The procedure was the same as in example 1. The reaction was carried out for the corresponding time periods, and the subsequent steps were the same as in example 1. When the reaction time is changed to 3h, 4h, 6h and 7h, the water contact angles are 145 degrees, 148 degrees, 152 degrees and 150.5 degrees respectively. Example 1 works best when the reaction time is 5h, the optimum water contact angle cannot be measured accurately, above 160 °.
Example 1 detection of oil-water separation Performance of magnetic super-hydrophobic composite Material
1. Detecting the oil-water separation performance of the magnetic super-hydrophobic composite material: 100g of oil-water mixed liquid with the mass fraction of 50% (petroleum ether is adopted), the prepared magnetic super-hydrophobic composite material and a matrix material (melamine sponge) are respectively used as filtering layers and placed in a self-made separator, and the oil-water mixed liquid is filtered by the separator. The weight of the filtrate was measured, and the oil-water separation efficiency was shown in Table 1.
TABLE 1 oil-water separation test results (50% oil-water mixture)
As can be seen from Table 1, compared with the unmodified melamine sponge, the prepared magnetic super-hydrophobic composite material has ultrahigh oil-water separation efficiency, and the separation efficiency is more than 94% when the filtering time is 2 hours.
Detecting the magnetic property of the magnetic super-hydrophobic composite material: the data were measured by a hysteresis loop and the sponge magnetic effect was 45.61437 emu/g.
Detecting the super-hydrophobic property of the magnetic super-hydrophobic composite material: the contact angle was measured and the results are shown in fig. 2. Fig. 2 is a contact angle measurement flow, and it can be seen that a water drop cannot stay on the surface of the composite material, which indicates that the composite material has ultrahigh hydrophobic effect, i.e. ultrahigh oil absorption performance is indicated.
The data show that the magnetic super-hydrophobic composite material can be well applied to oil-water separation. Compared with the traditional magnetic powder adsorption material which is simple in magnetic collection, the magnetic super-hydrophobic composite material can adsorb oil substances in a directional movement mode. The magnetic super-hydrophobic composite material can be attached to a metal surface, such as a ship surface, by utilizing a magnetic effect, and crude oil in leaked seawater can be adsorbed.
2. And (3) detecting the stability of the magnetic super-hydrophobic composite material: respectively adjusting the pH value of 100g of oil-water mixed liquor (the adopted oil is petroleum ether) to 1 and 14, repeatedly extruding the strong-acid or strong-alkaline oil-water mixed liquor through a magnetic super-hydrophobic composite material for multiple times for separation, calculating the separation efficiency, and measuring the water contact angle of the separated magnetic super-hydrophobic material. The results show that under acidic and alkaline conditions, the water contact angle can be stably maintained to be more than 140 degrees, good oil-water separation performance can be maintained even if the extrusion is repeatedly used for more than 30 times, and the separation efficiency is maintained to be 78.3 percent or more).
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A preparation method of a magnetic super-hydrophobic composite material is characterized by comprising the following steps:
(1) preparation of Fe3O4Nanoparticles
FeCl is added under nitrogen atmosphere3.6H2O、FeCl2.4H2Dispersing O and alkali in water, stirring for reaction, washing and drying to obtain Fe3O4A nanoparticle;
(2) preparation of magnetic super-hydrophobic composite material
Mixing the Fe obtained in the step (1)3O4Dispersing the nano particles and the matrix material in an alkaline ethanol solution, mixing, adding siloxane, stirring for reaction, washing, and drying to obtain the magnetic super-hydrophobic composite material.
2. The method for preparing a magnetic superhydrophobic composite material according to claim 1,
the FeCl in the step (1)3.6H2O and said FeCl2.4H2The mass ratio of O is (1-4): (1-4);
the alkali in the step (1) is one or more than two of NaOH solution, ammonia water and KOH solution;
the volume ratio of the alkali used in the step (1) to the water is (0.5-2): (8-24) calculating the mixture ratio.
3. The method for preparing a magnetic superhydrophobic composite material according to claim 2,
FeCl in the step (1)3.6H2O and said FeCl2.4H2The mass ratio of O is 2: 1;
the alkali in the step (1) is ammonia water;
the concentration of the ammonia water is 25-30% by mass;
the dosage of the alkali in the step (1) is 1: and (5) calculating the mixture ratio of 12.
4. The method for preparing a magnetic superhydrophobic composite material according to claim 1,
the water in the step (1) is redistilled water;
stirring reaction in the step (1) is carried out for 10-40 min at the temperature of 10-50 ℃ and at the rpm of 150-550 rpm;
in the step (1), deionized water and absolute ethyl alcohol are adopted for washing until the washing is neutral;
in the step (1), the drying is vacuum drying to constant weight.
5. The method for preparing a magnetic superhydrophobic composite material according to claim 4,
the stirring reaction in the step (1) is stirring at 350rpm for 10min at 40 ℃;
the temperature of the vacuum drying is 25-70 ℃.
6. The method for preparing a magnetic superhydrophobic composite material according to claim 1,
the siloxane in step (2) and the Fe in step (1)3O4The dosage ratio of the nanoparticles is 8-12 mL: 3-7 g;
in the step (2), the siloxane is one or more of dodecyl triethoxysilane, methyl triethoxysilane, dimethyl diethoxy silane and hexadecyl triethoxysilane;
adding an alkali solution into the ethanol solution as the alkaline ethanol solution in the step (2), wherein the alkali solution is one or more than two of NaOH solution, ammonia water and KOH solution;
in the step (2), the base material is one or two of cotton cloth or melamine sponge;
the mixing condition in the step (2) is that the mixture is stirred for 10-40 min at 150-550 rpm under the condition of 10-50 ℃;
the stirring reaction condition in the step (2) is 10-50 ℃ for 3-7 h at the rotating speed of 350 rpm.
7. The method of claim 6, wherein the magnetic superhydrophobic composite is prepared by a method comprising the steps of,
the siloxane in step (2) and the Fe in step (1)3O4The dosage ratio of the nano particles is 10 mL: 5g of the total weight of the mixture;
the alkali solution is ammonia water;
the volume ratio of the ethanol solution to the alkali solution is 90: 4;
in the ethanol solution in the step (2), the volume ratio of ethanol to water is (10-100): (1-20);
when the aqueous alkali is added, the concentration of the aqueous ammonia is 25-30% by mass;
when the alkali solution is added, NaOH solution or KOH solution is added, and the concentration of NaOH and KOH is 1 mol/L;
in the step (2), the matrix material is pretreated before reaction, and the pretreatment method comprises the following steps: extracting the mixed solution of ethanol and acetone at any ratio for 10h, and vacuum drying at 60 ℃ for 24 h;
the mixing condition in the step (2) is that the mixture is stirred for 10min at 350rpm under the condition of 40 ℃;
the stirring reaction condition in the step (2) is that the reaction is carried out for 5 hours at 40 ℃.
8. The method for preparing a magnetic superhydrophobic composite material according to claim 1,
the washing in the step (2) is carried out by adopting deionized water and absolute ethyl alcohol until the washing is neutral.
The drying in the step (2) is vacuum drying to constant weight;
the temperature of the vacuum drying is 25-70 ℃.
9. A magnetic superhydrophobic composite material prepared by the method of any one of claims 1-8.
10. Use of the magnetic superhydrophobic composite of claim 9 in oil-water separation.
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| CN103214690A (en) * | 2013-03-22 | 2013-07-24 | 哈尔滨工业大学 | Method for preparing durable super-hydrophobic material |
| CN105214630A (en) * | 2015-10-31 | 2016-01-06 | 仇颖超 | A kind of preparation method of super-hydrophobic magnetic polyurethane/ferriferrous oxide composite material |
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| CN103214690A (en) * | 2013-03-22 | 2013-07-24 | 哈尔滨工业大学 | Method for preparing durable super-hydrophobic material |
| CN105214630A (en) * | 2015-10-31 | 2016-01-06 | 仇颖超 | A kind of preparation method of super-hydrophobic magnetic polyurethane/ferriferrous oxide composite material |
| WO2019083198A1 (en) * | 2017-10-25 | 2019-05-02 | 울산대학교 산학협력단 | Complex and material containing same for oil-water separation |
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