CN111068362A - Preparation method of hydrophobic and oleophylic porous material - Google Patents
Preparation method of hydrophobic and oleophylic porous material Download PDFInfo
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Abstract
The invention discloses a preparation method of a hydrophobic and oleophylic porous material, which comprises the following steps: providing a precursor solution comprising nano-scale graphite particles, a high-molecular monomer, an initiator, a cross-linking agent, a pore-opening agent, a surfactant and water; pre-polymerizing the precursor solution at a first temperature to form a prepolymer; and carrying out polymerization opening treatment on the prepolymer at a second temperature to obtain a hydrophobic and oleophylic porous material, wherein the first temperature is lower than the second temperature.
Description
Technical Field
The invention relates to the field of preparation of environment functional materials, in particular to a preparation method of a hydrophobic and oleophilic porous material.
Background
In recent years, environmental issues have become a significant problem facing the community of human beings. Among them, the leakage of various industrial oils and the discharge of waste edible oils (commonly called illegal cooking oil) cause serious damage to the ecological environment of rivers, lakes and oceans, and are extremely easy to cause irreversible harm to human health. Therefore, how to remove the organic liquid in the water body is a great problem to be solved urgently at present.
The use of oil absorbing materials is currently the most common and safe way to solve such problems. Among them, graphene has a high theoretical specific surface area (up to 2620 m)2/g) with unique physical and chemical properties, so that strong van der waals force action can be generated between the organic pollutants, and the organic pollutants have strong adsorption capacity. Therefore, graphene-based oil-absorbing materials have become one of the hot spots of research in recent years.
In the prior art, graphene is mostly used as a raw material to perform hydrophobic modification treatment on a high polymer material. Although a series of graphene-based oil absorption materials with excellent performance are prepared, the existing preparation process is complicated and complicated due to the immature process for preparing graphene, so that the graphene is high in price, and the application range of the graphene-based oil absorption materials is limited.
Disclosure of Invention
In view of the problems in the prior art, an object of the present invention is to provide a method for preparing a hydrophobically modified melamine sponge, in which graphite particles are dispersed at an interface between an oil phase formed by a polymer monomer and an aqueous phase formed by water through a precursor solution containing a specific component, so as to be in-situ developed into graphene nanoplatelets, thereby greatly simplifying the preparation process of graphene. And the precursor solution can obtain a porous material with better hydrophobic and lipophilic properties through subsequent prepolymerization treatment and polymerization opening treatment.
The invention provides a preparation method of a hydrophobic and oleophylic porous material, which comprises the following steps:
providing a precursor solution comprising nano-scale graphite particles, a high-molecular monomer, an initiator, a cross-linking agent, a pore-opening agent, a surfactant and water;
pre-polymerizing the precursor solution at a first temperature to form a prepolymer; and
at a second temperature, the prepolymer is subjected to polymerization opening treatment to obtain a hydrophobic and oleophilic porous material,
wherein the first temperature is less than the second temperature.
The inventors of the present application found in studies that, in a precursor solution containing the above-mentioned specific components, nano-scale graphite particles can be developed in situ into graphene nanoplatelets at the interface of an oil phase formed by a high-molecular monomer and an aqueous phase formed by water. The preparation method provided by the invention can be used for preparing the graphene nanosheets from cheap graphite particles through a simple preparation process. And the graphene nanosheet has higher hydrophobicity, so that the porous material is endowed with better hydrophobic property.
In addition, the precursor solution is in a state that the graphene nanosheets are stable at the interface of the oil phase and the water phase, and partial high-molecular monomers in the precursor solution can be polymerized by pre-polymerizing the precursor solution at the first temperature, so that a prepolymer with certain strength and a porous structure is formed, and the graphene nanosheets can be uniformly dispersed and fixed in the prepolymer; and carrying out polymerization and opening treatment on the prepolymer at a second temperature to complete cross-linking polymerization of the residual high-molecular monomers, releasing a large amount of gas by using the opening agent, and breaking the hole walls by using the gas to communicate the internal holes so that the finally prepared porous material has a communicated hole structure.
In a preferred embodiment of the present invention, the nano-scale graphite particles are present in the precursor solution in an amount of 1 to 5 parts by mass based on 100 parts by mass of the polymer monomer; the water accounts for 100-400 parts by mass; preferably 200-400 parts by mass; the initiator is 0.01-5 parts by mass; 0.2-5 parts by mass of a crosslinking agent; the pore forming agent is 1-10 parts by mass; the surfactant is 0.0001-0.01 parts by mass.
According to the present invention, in the precursor solution, the nano-scale graphite particles are preferably 1.5 to 4.5 parts by mass, more preferably 2 to 4 parts by mass, and most preferably 2.5 to 3.5 parts by mass, based on 100 parts by mass of the polymer monomer; more preferably, the water is used in an amount of 250-350 parts by mass, and most preferably, the water is used in an amount of 300-350 parts by mass; the surfactant is preferably 0.001 to 0.7 part by mass, more preferably 0.01 to 0.7 part by mass, most preferably 0.05 to 0.5 part by mass; the initiator is preferably 0.05 to 3 parts by mass, more preferably 0.1 to 2 parts by mass, and most preferably 0.1 to 1 part by mass; the crosslinking agent is preferably 0.4 to 4 parts by mass, more preferably 0.5 to 3 parts by mass, and most preferably 1 to 2 parts by mass.
According to the present invention, when the amount of each component is within the above range, a stable and uniform hydrophobically modified solution can be formed.
In another preferred embodiment of the present invention, an emulsion in which the nano-scale graphite particles are dispersed at the interface between an oil phase formed by the polymer monomer and an aqueous phase formed by the water is formed as a precursor solution by dispersing the nano-scale graphite particles in the polymer monomer, adding water, a surfactant, an initiator, a crosslinking agent, and a cell opening agent, and blending.
According to the invention, because the polymer monomer has certain viscosity and the graphite particles are more oleophilic relative to water, the nano-scale graphite particles are firstly dispersed in the polymer monomer and then added with water. Thus, the dispersed nano-scale graphite particles are not easy to deposit or agglomerate in the high molecular monomer, and the stability of the prepared hydrophobic modified solution is improved.
According to the present invention, nano-scale graphite particles can be dispersed in a polymer monomer by means of ultrasound. When the ultrasonic dispersion mode is adopted, the ultrasonic power is 100W-500W, and the ultrasonic time is 3min-10 min.
According to the present invention, blending may be performed by mechanical stirring or a homogenizer. When mechanical stirring is adopted for blending, stirring is carried out for 5min to 30min at the rotating speed of 300r/min to 800 r/min.
According to the present invention, in order to more uniformly disperse the cell opener in the precursor solution, it is preferable that the cell opener having a better hydrophilicity be dispersed in water and/or the cell opener having a better hydrophobicity be dispersed in the polymer monomer.
According to the present invention, it is advantageous to increase the number of times of blending to obtain a porous material having a small pore size, and it is preferable to perform the blending treatment after adding a surfactant.
According to the present invention, the emulsion is a water-in-oil type emulsion because the oleophilic property of the graphite particles is better.
In another preferred embodiment of the present invention, the first temperature is 35 to 70 ℃ and the prepolymerization treatment time is 0.5 to 3 hours.
According to the present invention, the prepolymerization treatment can be carried out under heating in a water bath.
In another preferred embodiment of the present invention, the second temperature is 80 to 90 ℃ and the time of the polymerization opening treatment is 3 to 5 hours.
According to the invention, the prepolymerization is carried out at a lower temperature, and then the polymerization is carried out at a higher temperature, so that a porous material with certain strength can be formed in the prepolymerization stage, and the collapse can not occur in the later polymerization opening stage, thereby maintaining the porous structure.
In another preferred embodiment of the present invention, the polymeric monomer is selected from at least one of methyl methacrylate, methyl acrylate, butyl acrylate, isobutyl acrylate, octyl acrylate, tetradecyl acrylate, hexadecyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, butyl methacrylate, octyl methacrylate, dodecyl methacrylate, tetradecyl methacrylate, hexadecyl methacrylate, octadecyl methacrylate, vinyl acetate, acrylonitrile, styrene, methyl styrene, isoprene, and maleic anhydride.
According to the present invention, the polymeric monomer may be selected from one, two or three of the monomers listed above.
In another preferred embodiment of the present invention, the initiator is selected from at least one of azobisisobutyronitrile, azobisisoheptonitrile, dimethyl azobisisobutyrate, benzoyl peroxide, diacyl peroxide, potassium persulfate, sodium bisulfite;
the cross-linking agent is selected from at least one of Ethylene Glycol Dimethacrylate (EGDMA), Divinylbenzene (DVB), trimethylpropane Trimethacrylate (TRIM), pentaerythritol triacrylate (PETRA), pentaerythritol tetraacrylate (PETEEA), Tetraethyloxysilane (TEOS), N-Methylenebisacrylamide (MBA);
the cell opener is selected from at least one of acetone, petroleum ether, hexane, azodicarbonamide, azodiisobutyronitrile, benzenesulfonyl hydrazide, 4-oxybenzene sulfonyl semicarbazide, p-toluene sulfonyl semicarbazide, barium azodicarboxylate, N-dimethyl-N, N' dinitrosoterephthalamide, trihydrazinotriazine, citric acid, ammonium carbonate, ammonium bicarbonate and sodium bicarbonate;
the surfactant is selected from at least one of stearyl dimethyl benzyl ammonium chloride, nonylphenol polyoxyethylene ether, sorbitan oleate, cocobetaine, cocoamine polyoxyethylene ether, oleyl alcohol, sorbitan monolaurate-20, sorbitan monolaurate-40, sorbitan monolaurate-60, sorbitan monolaurate-80, tween-20, tween-40, tween-60, tween-80, sodium dodecyl sulfate, sodium octadecyl sulfate, sodium dodecyl benzene sulfonate, sodium dioctyl succinate, hexadecyl trimethyl quaternary ammonium bromide, octadecyl dimethyl benzyl quaternary ammonium chloride, dioctadecyl amine hydrochloride and N, N-dimethyl octadecyl amine hydrochloride.
In another preferred embodiment of the present invention, the nano-sized graphite particles have a particle size of 325 mesh to 12000 mesh, preferably 2000 mesh to 10000 mesh.
The inventors of the present application found in research that when the particle size of the graphite particles is larger than 325 mesh, especially larger than 2000 mesh, the graphite particles cannot be expanded into graphene nanoplatelets in situ at the two-phase interface due to the larger particle size, and are liable to fall off from the melamine sponge during subsequent use. On the other hand, when the particle size of the graphite particles is smaller than 12000 meshes, especially smaller than 10000 meshes, agglomeration is likely to occur due to too small particle size, so that the finally formed graphene nanosheet has uneven surface and poor hydrophobic effect. Therefore, in the present application, the particle size of the graphite particles is limited to the above range from the viewpoint of obtaining graphene nanoplatelets having a good morphology and a large specific surface area.
According to the present invention, the nano-sized graphite particles can be obtained by a commercially available method.
In still another aspect, the present invention provides a hydrophobic oleophilic porous material prepared according to the above preparation method.
In a preferred embodiment of the present invention, the hydrophobic and oleophilic porous material has a water contact angle of 120 ° or more, an absorption capacity of 15g/g or more for organic solvents, and an absorption capacity of 10g/g or more for pump oils.
According to the present invention, the organic solvent may be n-hexane, toluene or chloroform; besides pump oil, it can also be used for absorption of lubricating or mineral oils.
The porous material prepared by the preparation method has a water contact angle of over 115 degrees and good hydrophobicity. In addition, the porous material prepared by the preparation method provided by the invention has the absorption capacity of over 16.5g/g for toluene, over 17.3g/g for chloroform and over 10.2g/g for pump oil.
Drawings
FIG. 1 is a photograph showing the adsorption performance test of the porous material obtained in example 1.
Detailed Description
The present invention will be described in detail below with reference to examples, but the scope of the present invention is not limited to the following description.
The porous materials prepared in examples 1 to 4 and comparative examples 1 to 2 were tested and analyzed in the following manner.
Contact angle of water: the contact angle of water was measured at room temperature using an OCAZO contact angle tester, and the contact angle was read from a picture of a water drop dropped from an injection needle when it was in contact with a porous material. The amount of water added was controlled to 6. mu.L. .
Absorption capacity test of organic solvents or pump oils: soaking a pre-weighed dry porous material into a beaker filled with an organic solvent or No. 100 pump oil, taking out the material after saturation adsorption, putting the material into a dry beaker with the mass reset for weighing after no more dripping within 10s of oil drops, wherein the calculation formula of the saturation absorption capacity of the porous material is as follows:
Q＝(m-m0)/m0
in the above formula: q is saturated oil absorption energyForce, g/g; m is the mass of the porous material after saturated adsorption, g; m is0Mass of the porous material before adsorption, g.
The apparatus used in the following examples 1-4, comparative examples 1-2 include, but are not limited to:
a contact angle tester, an OCAZO optical contact angle tester from Dataphysics, germany;
ultrasonic cleaning machine, ultrasonic cleaning machine of korean JAC-2010P.
The reagents used in the following examples 1-4, comparative examples 1-2 include, but are not limited to:
nano-scale graphite particles, hongda graphite products limited company of south villa of Qingdao.
Example 1
A. Preparation of precursor solution
An aqueous solution of sodium hydrogencarbonate (cell opener) having a sodium hydrogencarbonate concentration of 5% and an aqueous solution of sorbitan oleate (surfactant) having a sorbitan oleate concentration of 0.36% were prepared in volumetric flasks, respectively.
0.075g of graphite particles (particle size 325 mesh) was added to 5g of isooctyl acrylate and dispersed by means of ultrasound with an ultrasound power of 300W and an ultrasound time of 5 min.
Then, 15g of sodium bicarbonate aqueous solution is added, 0.02g of sorbitan oleate aqueous solution is added, and the mixture is blended for 5min at the rotating speed of 500r/min in a mechanical stirring manner.
Then, 0.05g of azobisisobutyronitrile (initiator) and 0.05g of ethylene glycol dimethacrylate (EGDMA, cross-linking agent) are added, and the mixture is blended for 5min at the rotating speed of 500r/min in a mechanical stirring mode to obtain the oil (isooctyl polyacrylate phase) water-in-oil (water phase) type reversed-phase Pickering emulsion (namely precursor solution) with graphite in a flaky dispersion.
B. Preparation of porous materials
And (C) carrying out prepolymerization treatment on the precursor solution prepared in the step (A) for 1 hour under the condition of water bath at the temperature of 60 ℃, transferring the precursor solution to the temperature of 90 ℃ for polymerization and opening, and treating for 3 hours to obtain the porous material.
The contact angle of water of the prepared porous material is tested, and the result shows that the contact angle of water is 120 degrees +/-3 degrees, and the prepared porous material has good hydrophobicity.
The prepared porous material is subjected to an oil-water solution absorption capacity test, and the result is shown in figure 1, so that the porous material can better absorb oil in water.
Example 2
A. Preparation of precursor solution
0.05g of hexane (cell opener) was added to 5g of a mixed monomer composed of a butyl acrylate monomer and a methyl methacrylate monomer in a ratio of 3:1, and then 0.25g of graphite particles (particle size 1000 mesh) were added to the mixed monomer and dispersed by means of ultrasound with an ultrasonic power of 300W for 5 min.
Then, 17g of water was added, and then 0.1mg of sorbitan monolaurate-40 (surfactant) and 0.1mg of Tween-60 (surfactant) were added, and they were blended by mechanical stirring at a rotation speed of 500r/min for 5 min.
Then, 0.04g of potassium persulfate (initiator), 0.02g of sodium bisulfite (initiator) and 0.1g of divinylbenzene (DVB, crosslinking agent) were added, and the mixture was blended for 5 minutes at a rotation speed of 500r/min by means of mechanical stirring to obtain an oil (polybutyl acrylate-methyl methacrylate phase) water-in-oil (aqueous phase) type reversed-phase Pickering emulsion (i.e., precursor solution) in which graphite was dispersed in a sheet form.
B. Preparation of porous materials
And (C) carrying out prepolymerization treatment on the precursor solution prepared in the step (A) for 1 hour under the condition of 35 ℃ water bath, transferring the precursor solution to 70 ℃ for polymerization and opening, and treating for 3 hours to obtain the porous material.
The contact angle of water of the prepared porous material is tested, and the result shows that the contact angle of water is 116 degrees +/-3 degrees, and the prepared porous material has good hydrophobicity.
Example 3
A. Preparation of precursor solution
0.1g of graphite particles (with a particle size of 5000 meshes) are added into 5g of butyl acrylate and dispersed by means of ultrasound, the ultrasound power is 300W, and the ultrasound time is 5 min.
0.05g of p-toluenesulfonylhydrazide (cell opener) was added, followed by 16g of water and then 0.2mg of N, N-dimethyloctadecylamine hydrochloride (surfactant) were added, and they were blended by mechanical stirring at a rotation speed of 500r/min for 5 min.
Then, 0.1g of benzoyl peroxide (initiator) and 0.1g of pentaerythritol triacrylate (cross-linking agent) are added, and the mixture is blended for 5min at the rotating speed of 500r/min in a mechanical stirring mode to obtain the oil (polybutyl acrylate phase) water (water phase) type inverse Pickering emulsion (namely precursor solution) with graphite in a flaky dispersion.
B. Preparation of porous materials
And (C) carrying out prepolymerization treatment on the precursor solution prepared in the step (A) for 1 hour under the condition of water bath at the temperature of 60 ℃, transferring the precursor solution to the temperature of 100 ℃ for polymerization and opening, and treating for 3 hours to obtain the porous material.
The contact angle of water of the prepared porous material is tested, and the result shows that the contact angle of the water is 115 degrees +/-3 degrees, which shows that the porous material has good hydrophobicity.
Example 4
A. Preparation of precursor solution
An aqueous solution of petroleum ether (cell opener) having a concentration of 1% was prepared in a volumetric flask.
0.155g of graphite particles (particle size 10000 mesh) are added to 5g of butyl acrylate and dispersed by means of ultrasound, the ultrasound power is 300W and the ultrasound time is 5 min.
Then 17.5g of petroleum ether aqueous solution is added, 0.25mg of sodium dodecyl sulfate (surfactant) is added, and the mixture is blended for 5min at the rotating speed of 500r/min by a mechanical stirring mode.
Then, 0.15g of azobisisobutyric acid dimethyl ester (initiator) and 0.15g of N, N-methylene bisacrylamide (MBA, crosslinking agent) were added and blended by means of mechanical stirring at a rotation speed of 500r/min for 5min to obtain an oil (polybutylacrylate phase) water-in-oil (water phase) type reversed-phase Pickering emulsion (i.e., precursor solution) in which graphite was dispersed in a sheet form.
B. Preparation of porous materials
And (C) carrying out prepolymerization treatment on the precursor solution prepared in the step (A) for 1 hour under the condition of water bath at the temperature of 60 ℃, transferring the precursor solution to the temperature of 90 ℃ for polymerization and opening, and treating for 3 hours to obtain the porous material.
The contact angle of water of the prepared porous material is tested, and the result shows that the contact angle of water is 118 degrees +/-3 degrees, which shows that the porous material has good hydrophobicity.
Comparative example 1
A. Preparation of precursor solution
The precursor solution was prepared according to step a in example 4, except that "1.5 mg of sodium lauryl sulfate" was used instead of "0.25 mg of sodium lauryl sulfate" in example 4, and it was revealed that the resulting precursor solution was a multi-phase system in which graphite was dispersed in the form of flakes in water-in-oil (aqueous) droplets (polybutylacrylate phase) and the water-in-oil droplets were dispersed in the milky oil-in-water phase, and a water-in-oil reverse-phase pickering emulsion in which graphite was dispersed in the form of flakes could not be obtained.
B. Preparation of porous materials
A porous material was prepared according to step B of example 4, and after completion of the polymerization, a milky white liquid was present in the upper part of the system, and a small amount of a black porous solid was obtained in the bottom part.
The contact angle of water of the prepared black porous solid is tested, and the result shows that the contact angle of water is 122 degrees +/-3 degrees.
Comparative example 2
A. Preparation of precursor solution
A precursor solution was prepared according to step a in example 4, except that "aqueous heptane solution" was used instead of "aqueous petroleum ether solution" in example 4, to obtain an oil (polybutylacrylate phase) water-in-oil (aqueous phase) type inverse pickering emulsion (i.e., precursor solution) in which graphite was dispersed in a flaky form.
B. Preparation of porous materials
A porous material was prepared according to step B of example 4, and the system was very unstable during the polymerization, and a material having hollow macropores inside was obtained after the polymerization was completed.
The contact angle of water of the prepared material is tested, and the result shows that the contact angle of the water is 115 degrees +/-3 degrees.
Test example 1
The porous materials obtained in examples 1 to 4 and comparative examples 1 to 2 were subjected to the absorption capacity test, and the results are shown in Table 1.
TABLE 1
As can be seen from Table 1, the porous material prepared by the preparation method of the present application has an absorption capacity of 15g/g or more for organic solvents and 10g/g or more for pump oil; while comparative examples 1 and 2, in which the amount of the surfactant and the selected cell opener were not within the range defined in the present application, could not obtain the technical effects equivalent to the present application.
In addition, the porous material prepared by the preparation method can be repeatedly used after simple repeated extrusion. The absorption capacity can be achieved when the repeated use times are within 10 times.
It should be noted that the above-mentioned embodiments are only for explaining the present invention, and do not set any limit to the present invention. The present invention has been described with reference to exemplary embodiments, but the words which have been used herein are words of description and illustration, rather than words of limitation. The invention can be modified, as prescribed, within the scope of the claims and without departing from the scope and spirit of the invention. Although the invention has been described herein with reference to particular means, materials and embodiments, the invention is not intended to be limited to the particulars disclosed herein, but rather extends to all other methods and applications having the same functionality.
Claims (10)
1. A preparation method of a hydrophobic and oleophilic porous material comprises the following steps:
providing a precursor solution comprising nano-scale graphite particles, a high-molecular monomer, an initiator, a cross-linking agent, a pore-opening agent, a surfactant and water;
pre-polymerizing the precursor solution at a first temperature to form a prepolymer; and
at a second temperature, the prepolymer is subjected to polymerization opening treatment to obtain a hydrophobic and oleophilic porous material,
wherein the first temperature is less than the second temperature.
2. The production method according to claim 1, wherein the nano-sized graphite particles are present in the precursor solution in an amount of 1 to 5 parts by mass based on 100 parts by mass of the polymer monomer; the water accounts for 100-400 parts by mass; preferably 200-400 parts by mass; the initiator is 0.01-5 parts by mass; 0.005-0.1 part by mass of a crosslinking agent; the pore forming agent is 1-10 parts by mass; the surfactant is 0.0001-0.01 parts by mass.
3. The production method according to claim 1 or 2, wherein an emulsion in which the nano-sized graphite particles are dispersed at an interface between an oil phase formed by the polymer monomer and an aqueous phase formed by the water is formed as a precursor solution by dispersing the nano-sized graphite particles in a polymer monomer, adding water, a surfactant, an initiator, a crosslinking agent, and a cell opening agent, and blending.
4. The process according to any one of claims 1 to 3, wherein the first temperature is from 35 to 70 ℃ and the prepolymerization treatment time is from 0.5 to 3 hours.
5. The method of any one of claims 1-4, wherein the second temperature is 80-90 ℃ and the time of the polymerization opening treatment is 3-5 h.
6. The method according to any one of claims 1 to 5, wherein the polymer monomer is at least one selected from the group consisting of methyl methacrylate, methyl acrylate, butyl acrylate, isobutyl acrylate, octyl acrylate, tetradecyl acrylate, hexadecyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, butyl methacrylate, octyl methacrylate, dodecyl methacrylate, tetradecyl methacrylate, hexadecyl methacrylate, octadecyl methacrylate, vinyl acetate, acrylonitrile, styrene, methyl styrene, isoprene, and maleic anhydride.
7. The production method according to any one of claims 1 to 6,
the initiator is selected from at least one of azobisisobutyronitrile, azobisisoheptonitrile, dimethyl azobisisobutyrate, benzoyl peroxide, diacyl peroxide, potassium persulfate and sodium bisulfite;
the cross-linking agent is at least one selected from ethylene glycol dimethacrylate, divinyl benzene, trimethylpropane trimethacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, tetraethyloxysilane and N, N-methylenebisacrylamide;
the cell opener is selected from at least one of acetone, petroleum ether, hexane, azodicarbonamide, benzenesulfonhydrazide, 4-oxybenzene sulfonyl semicarbazide, p-toluene sulfonyl semicarbazide, barium azodicarboxylate, N-dimethyl-N, N' -dinitrosoterephthalamide, trihydrazino s-triazine, citric acid, ammonium carbonate, ammonium bicarbonate and sodium bicarbonate;
the surfactant is selected from at least one of stearyl dimethyl benzyl ammonium chloride, nonylphenol polyoxyethylene ether, sorbitan oleate, cocobetaine, cocoamine polyoxyethylene ether, oleyl alcohol, sorbitan monolaurate-20, sorbitan monolaurate-40, sorbitan monolaurate-60, sorbitan monolaurate-80, tween-20, tween-40, tween-60, tween-80, sodium dodecyl sulfate, sodium octadecyl sulfate, sodium dodecyl benzene sulfonate, sodium dioctyl succinate, hexadecyl trimethyl quaternary ammonium bromide, octadecyl dimethyl benzyl quaternary ammonium chloride, dioctadecyl amine hydrochloride and N, N-dimethyl octadecyl amine hydrochloride.
8. The method according to any one of claims 1 to 7, wherein the nano-sized graphite particles have a particle size of 325 mesh to 12000 mesh, preferably 2000 mesh to 10000 mesh.
9. A hydrophobic oleophilic porous material prepared according to the preparation method of any one of claims 1-8.
10. The hydrophobic oleophilic porous material of claim 9, wherein the hydrophobic oleophilic porous material has a water contact angle above 120 °, an absorption capacity above 15g/g for organic solvents and an absorption capacity above 10g/g for pump oil.
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| CN114230723A (en) * | 2021-12-28 | 2022-03-25 | 青岛理工大学 | Graphene oxide modified styrene-acrylic pickering emulsion, composite emulsion, and preparation method and application thereof |
| CN114369190A (en) * | 2022-01-24 | 2022-04-19 | 西南石油大学 | Preparation method of high-elasticity super-hydrophobic polystyrene porous material |
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