CN115889145B - High-durability oil-water separation net and preparation method thereof - Google Patents
High-durability oil-water separation net and preparation method thereof Download PDFInfo
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- CN115889145B CN115889145B CN202211581987.1A CN202211581987A CN115889145B CN 115889145 B CN115889145 B CN 115889145B CN 202211581987 A CN202211581987 A CN 202211581987A CN 115889145 B CN115889145 B CN 115889145B
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- 238000000926 separation method Methods 0.000 title claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title claims abstract description 31
- 238000000576 coating method Methods 0.000 claims abstract description 49
- 239000011248 coating agent Substances 0.000 claims abstract description 48
- 239000002105 nanoparticle Substances 0.000 claims abstract description 45
- 239000011347 resin Substances 0.000 claims abstract description 32
- 229920005989 resin Polymers 0.000 claims abstract description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910021485 fumed silica Inorganic materials 0.000 claims abstract description 28
- 239000002131 composite material Substances 0.000 claims abstract description 27
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 18
- 239000010935 stainless steel Substances 0.000 claims abstract description 18
- 229920001661 Chitosan Polymers 0.000 claims abstract description 15
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims abstract description 15
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 12
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 29
- 239000000243 solution Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 239000006185 dispersion Substances 0.000 claims description 12
- 235000019441 ethanol Nutrition 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- SNGREZUHAYWORS-UHFFFAOYSA-N perfluorooctanoic acid Chemical compound OC(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F SNGREZUHAYWORS-UHFFFAOYSA-N 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 5
- 239000010963 304 stainless steel Substances 0.000 claims description 4
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- ORWIEAKWZZIQKG-UHFFFAOYSA-N 2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluorooctanoic acid;sodium Chemical compound [Na].OC(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F ORWIEAKWZZIQKG-UHFFFAOYSA-N 0.000 claims description 3
- -1 perfluoro Chemical group 0.000 claims 1
- BYKRNSHANADUFY-UHFFFAOYSA-M sodium octanoate Chemical compound [Na+].CCCCCCCC([O-])=O BYKRNSHANADUFY-UHFFFAOYSA-M 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 6
- 229910052708 sodium Inorganic materials 0.000 abstract description 3
- 239000011734 sodium Substances 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 10
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 210000002747 omentum Anatomy 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 210000004379 membrane Anatomy 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 125000005474 octanoate group Chemical group 0.000 description 2
- 238000005580 one pot reaction Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- LWHQXUODFPPQTL-UHFFFAOYSA-M sodium;2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-pentadecafluorooctanoate Chemical compound [Na+].[O-]C(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F LWHQXUODFPPQTL-UHFFFAOYSA-M 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- FEWFXBUNENSNBQ-UHFFFAOYSA-N 2-hydroxyacrylic acid Chemical compound OC(=C)C(O)=O FEWFXBUNENSNBQ-UHFFFAOYSA-N 0.000 description 1
- GFLJTEHFZZNCTR-UHFFFAOYSA-N 3-prop-2-enoyloxypropyl prop-2-enoate Chemical compound C=CC(=O)OCCCOC(=O)C=C GFLJTEHFZZNCTR-UHFFFAOYSA-N 0.000 description 1
- 229910002012 Aerosil® Inorganic materials 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 241000219000 Populus Species 0.000 description 1
- 239000004113 Sepiolite Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920006335 epoxy glue Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000879 optical micrograph Methods 0.000 description 1
- 229920000371 poly(diallyldimethylammonium chloride) polymer Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 230000003075 superhydrophobic effect Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/204—Keeping clear the surface of open water from oil spills
Landscapes
- Laminated Bodies (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The embodiment of the disclosure discloses a preparation method of a high-durability oil-water separation net, which is characterized in that fumed silica nano particles are modified by adopting sodium perfluoro octoate and chitosan quaternary ammonium salt, acrylic resin is introduced to prepare a coating based on a resin-coated nano particle composite structure, and the coating is sprayed on a stainless steel net, so that the oil-water separation net based on the resin-coated nano particle composite structure is prepared. The oil-water separation net prepared by simple equipment and technology has super oleophobic/super hydrophilic property and mechanical durability, and has higher separation efficiency and separation flux in a severe oil-water environment.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of micro-nano manufacturing, in particular to a high-durability oil-water separation net based on a resin coated nanoparticle composite structure, which is simple in process and convenient to prepare, and a preparation method thereof.
Background
Frequent leakage of offshore oil and discharge of oily wastewater can cause serious consequences for animals, humans and the environment, and the omentum separation method has become a research hot spot for the problem of oil-water separation due to low cost, high efficiency and stable performance. At present, most of super-hydrophobic/super-oleophylic net membranes for oil-water separation are easy to be polluted by oil in the separation process, so that oil flux is reduced, and the materials are required to be periodically cleaned. The superhydrophilic/underwater superoleophobic surface has excellent underwater oil resistance, and can prevent the omentum from being contaminated, but each pore of the underwater superoleophobic surface needs to be pre-wetted with water and the oleophobic property of the omentum coating depends on the formation and maintenance of the surface water film, resulting in limited applications. The surface of the coating with super oleophobic property and super hydrophilic property in the air is an ideal material for realizing oil-water separation, and the addition of nano particles into the modified liquid is a mode for effectively improving the surface roughness and optimizing the oil-water separation capability of the coating.
Poplar et al (Yang, zhang, xu, et al, superhydro-pyl-superolephobic coatings [ J ]. J Phys Chem,2012,22 (7): 2834) reacted with PFO by SiO2 doped PDDA to obtain a composite polymer with good oleophobic/hydrophilic properties, however, such coating surface attachment materials are susceptible to flaking and thus reduced efficacy. Chen et al (Chen,Dong,Zhang,et al.A Novel Sepiolite-based Superhydrophilic/Superoleophobic Coating and Its Application in Oil-Water Separation:Letter[J].Chemistry Letters,2020,49(12)) propose to spray an epoxy glue solution onto a substrate, followed by multiple layers of super oleophobic/super hydrophilic coating, the cured epoxy resin causing the coating to adhere to the substrate surface, but the method only has a certain mechanical durability in the part of the functional layer that is in close contact with the glue layer. Land et al (Lu,Li,Miao,et al.Superhydrophilic/superoleophobic shell powder coating as aversatile platform for both oil/water and oil/oil separation[J].Journal of Membrane Science,2021,637) propose that 3M adhesive is sprayed onto the substrate surface, then superoleophobic/superhydrophilic coating and 3M adhesive are sprayed repeatedly in sequence, and finally the preparation is finished by spraying the modified coating, and the alternative spraying mode greatly improves the mechanical durability of the coating, but the preparation process is relatively complicated.
Therefore, the inventor provides a high-durability oil-water separation net based on a resin coated nanoparticle composite structure and a preparation method thereof, and the oil-water separation net prepared by the method has super oleophobic/super hydrophilic property and mechanical durability, and has simple and convenient manufacturing process and low cost.
Disclosure of Invention
The embodiment of the disclosure provides an oil-water separation net based on a resin coated nanoparticle composite structure and a preparation method thereof, and the oil-water separation net has the advantages of simple process, low cost, super oleophobic/super hydrophilic property and mechanical durability.
According to an aspect of the present disclosure, a method for preparing a high durability oil-water separation net is provided, including: preparing a coating based on a resin-coated nanoparticle composite structure; spraying the prepared coating based on the resin-coated nanoparticle composite structure on a stainless steel substrate; and after the paint is dried, obtaining the high-durability oil-water separation net with the coating based on the resin-coated nanoparticle composite structure.
Alternatively, in the above method, the nanoparticle is a fumed silica nanoparticle exhibiting hydrophilicity and a specific surface area of 200m 2/g.
Alternatively, in the above method, the resin is a hydroxy acrylic resin.
Optionally, in the above method, preparing the coating based on the resin-coated nanoparticle composite structure specifically includes: adding fumed silica nanoparticles into absolute ethyl alcohol, and uniformly stirring to prepare fumed silica dispersion; adding perfluoro caprylic acid and sodium hydroxide into absolute ethyl alcohol, and uniformly stirring to prepare perfluoro caprylic acid sodium alcohol solution; adding chitosan quaternary ammonium salt into deionized water, and uniformly stirring to prepare a chitosan quaternary ammonium salt aqueous solution; adding the prepared sodium perfluor octoate ethanol solution and the chitosan quaternary ammonium salt water solution into the prepared fumed silica dispersion liquid under the stirring state, and reacting to prepare the super oleophobic/super hydrophilic coating; and adding the super oleophobic/super hydrophilic coating into an acrylic resin glue solution, and uniformly stirring to prepare the coating with the resin-coated nano particle composite structure.
Alternatively, in the above method, the fumed silica particles are present at a concentration of 0.013g/ml.
Optionally, in the above method, the mass ratio of the hydroxyacrylic resin to the fumed silica nanoparticle is 2:1.
Optionally, in the above method, the stainless steel substrate is a 304 stainless steel mesh of 100-400 mesh.
According to another aspect of the present disclosure, there is also provided a high durability oil-water separation net prepared by the above-described preparation method.
Compared with the prior art, the embodiment of the disclosure has at least the following beneficial technical effects:
(1) The oil-water separation net prepared by adopting the composite structure of the hydroxyl acrylic resin coated fumed silica nano particles has super oleophobic/super hydrophilic property and mechanical durability, and has good practicability;
(2) The preparation method adopts a one-pot method to prepare the coating, the preparation related instrument and process are simple, the coating can be prepared at normal temperature, the reaction is mild, and the operation is convenient;
(3) The prepared separation net has good separation efficiency and separation flux in a complex and severe oil-water environment, and meanwhile, the separation efficiency is still high after multiple times of separation.
Drawings
FIG. 1 is a topography of a stainless steel mesh sample surface prepared according to an embodiment of the present disclosure after being oiled and water, respectively;
FIG. 2 is an optical microscopy image of a stainless steel mesh sample prepared in an embodiment of the present disclosure;
FIG. 3 is a Scanning Electron Microscope (SEM) image of a stainless steel mesh sample prepared according to an embodiment of the present disclosure;
FIGS. 4A-4B are SEM images of the surface of a stainless steel mesh before and after 30 wear cycles, respectively;
FIG. 5 is a schematic flow chart of a method of making a high durability oil-water separation web according to an embodiment of the present disclosure; and
Fig. 6 is a schematic flow chart of the preparation of a coating based on a resin-coated nanoparticle composite structure in the above preparation method.
Detailed description of the preferred embodiments
According to an embodiment of the disclosure, a preparation method of a high-durability oil-water separation net based on a resin-coated nanoparticle composite structure is provided, which specifically comprises the following steps:
(1) Preparation of fumed silica dispersion: adding fumed silica nano particles into absolute ethyl alcohol, and uniformly stirring;
(2) Preparation of the modification solution: adding perfluoro caprylic acid and sodium hydroxide into absolute ethyl alcohol, and reacting for a period of time; adding chitosan quaternary ammonium salt into deionized water, and uniformly stirring to obtain chitosan quaternary ammonium salt aqueous solution;
(3) Adding the sodium perfluor octoate ethanol solution and the chitosan quaternary ammonium salt water solution into the fumed silica dispersion liquid under the stirring state, and reacting for a period of time to obtain the super oleophobic/super hydrophilic coating;
(4) Adding acrylic resin glue solution into super oleophobic/super hydrophilic paint;
(5) And spraying the obtained coating on a stainless steel net, and drying the coating to obtain the high-durability oil-water separation net based on the resin coated nanoparticle composite structure.
In the preparation method, the 304 stainless steel mesh is sequentially and respectively put into solutions such as acetone, ethanol, deionized water and the like, and the stainless steel mesh is cleaned in an ultrasonic manner to ensure that the surface of the stainless steel mesh is clean;
In the preparation method, the reaction temperature adopted in all the reaction steps is room temperature;
in the preparation method, the mass ratio of the perfluorooctanoic acid to the sodium hydroxide in the step (2) is 10:1;
in the preparation method, the acrylic resin in the step (4) is hydroxy acrylic resin and is dissolved in ethyl acetate.
As an example, the above preparation method may include the steps of:
(1) To 15mL of absolute ethanol was added 0.4g of fumed silica nanoparticles, and the mixture was magnetically stirred for 2 hours to obtain a fumed silica dispersion.
(2) To 2ml of deionized water, 0.03g of chitosan quaternary ammonium salt was added, and the solution was completely dissolved by magnetic stirring for 30 minutes to obtain a transparent and slightly viscous chitosan quaternary ammonium salt aqueous solution, which was designated as solution A.
(3) To 10ml of absolute ethanol, 0.05g of sodium hydroxide and 0.5g of perfluorooctanoic acid were added, and the mixture was magnetically stirred for 1 hour to obtain a sodium perfluorooctanoate ethanol solution, which was designated as liquid B.
(4) Slowly adding the solution A prepared in the step (2) and the solution B prepared in the step (3) into the fumed silica dispersion liquid under the condition of stirring, and magnetically stirring for 2 hours to prepare the modified nanoparticle dispersion liquid.
(5) 0.8G of a hydroxyacrylic acid resin was dissolved in 2ml of ethyl acetate, and then slowly added to the modified nanoparticle dispersion prepared in the step (4), and stirring was continued for 30min to prepare a coating.
(6) And (3) spraying the coating prepared in the step (5) on a stainless steel net to obtain the high-durability oil-water separation net based on the resin coated nanoparticle composite structure.
Fig. 1 shows a topography diagram of an oil-water separation net sample after oil and water are dropped on the surface, the oil drops are in a nearly spherical state on a coating, and the water is quickly wetted and completely spread on the surface, so that the prepared oil-water separation net has excellent super-oleophobic/super-hydrophilic property.
Through tests, the oil-water separation net prepared according to the scheme has a contact angle of 155 degrees on the surface of engine oil and a contact angle of 0 degree on the surface of water, the prepared separation net still maintains super oleophobic/super hydrophilic property even after 30 times of abrasive paper abrasion cycles, has more than 96 percent of separation efficiency and more than 1.6X10 4L/(m2 h of separation flux in mixed solution of oil and water (alkaline, acidic, neutral, cold and hot), and has 96.33 percent of separation efficiency after 20 times of separation cycles.
Fig. 2 shows an optical microscopic image of a prepared oil-water separation net sample, the stainless steel net surface is completely covered by fumed silica nanoparticles, and the stainless steel net has high surface roughness, a certain mesh area is reserved, and high separation flux is achieved.
Fig. 3 shows a Scanning Electron Microscope (SEM) image of an oil-water separation network sample, and it can be seen that the micron-sized agglomerates overlap with the nano-sized particles, and the fumed silica has higher porosity and specific surface area, and the micro morphology of the micro-nano composite structure enables the stainless steel network to have higher super wettability.
Fig. 4 shows SEM images of the surface of the oil-water separation net before and after 30 wear cycles, the mechanical durability test was performed on the coating, and the surface morphology of the coating before and after wear was not significantly changed due to the addition of acrylic resin.
Fig. 5 shows a schematic flow chart of a method of manufacturing a high durability oil-water separation net according to an embodiment of the present disclosure. As shown in fig. 5, the preparation method may include: s505, preparing a coating based on a resin-coated nanoparticle composite structure; s510, spraying the prepared coating based on the resin-coated nanoparticle composite structure on a stainless steel substrate; and S515, after the paint is dried, obtaining the high-durability oil-water separation net with the coating based on the resin-coated nanoparticle composite structure.
As an example, as shown in fig. 6, preparing a coating based on a resin-coated nanoparticle composite structure may include: s605, adding fumed silica nano particles into absolute ethyl alcohol, and uniformly stirring to prepare fumed silica dispersion; s610, adding perfluoro caprylic acid and sodium hydroxide into absolute ethyl alcohol, and uniformly stirring to prepare perfluoro caprylic acid sodium alcohol solution; s615, adding chitosan quaternary ammonium salt into deionized water, and uniformly stirring to prepare a chitosan quaternary ammonium salt aqueous solution; s620, adding the prepared sodium perfluorooctanoate ethanol solution and the chitosan quaternary ammonium salt water solution into the prepared fumed silica dispersion liquid under the stirring state to react, so as to prepare the super oleophobic/super hydrophilic coating; s625, adding the super oleophobic/super hydrophilic coating into an acrylic resin glue solution, and uniformly stirring to prepare the coating based on the resin-coated nanoparticle composite structure.
Although the steps are shown as having a certain order to each other in fig. 6 for convenience of explanation, this is not meant to limit the principles of the present disclosure to the order described above. In practice, the steps may be performed in a sequence that is adjusted to each other or in parallel, as desired. For example, steps S610, S615, and S620 may be performed simultaneously or permuted without departing from the principles of the present disclosure.
Alternatively, in the above method, the nanoparticle is a fumed silica nanoparticle exhibiting hydrophilicity and a specific surface area of 200m 2/g.
Alternatively, in the above method, the resin is a hydroxy acrylic resin.
Alternatively, in the above method, the fumed silica particles are present at a concentration of 0.013g/ml.
Optionally, in the above method, the mass ratio of the hydroxyacrylic resin to the fumed silica nanoparticle is 2:1.
Optionally, in the above method, the stainless steel substrate is a 304 stainless steel mesh of 100-400 mesh.
According to another aspect of the present disclosure, there is also provided a high durability oil-water separation net prepared by the above-described preparation method.
Compared with the prior art, the embodiment of the disclosure has at least the following beneficial technical effects: the oil-water separation net prepared by coating the aerosil nano particle composite structure with the hydroxy acrylic resin has super oleophobic/super hydrophilic property and mechanical durability, and has good practicability; the preparation method adopts a one-pot method to prepare the coating, the preparation related instrument and process are simple, the coating can be prepared at normal temperature, the reaction is mild, and the operation is convenient; the prepared separation net has good separation efficiency and separation flux in a complex and severe oil-water environment, and meanwhile, the separation efficiency is still high after multiple times of separation.
Claims (8)
1. A preparation method of a high-durability oil-water separation net comprises the following steps:
Preparing a coating based on a resin-coated nanoparticle composite structure;
spraying the prepared coating based on the resin-coated nanoparticle composite structure on a stainless steel substrate; and
After the paint is dried, a high-durability oil-water separation net with a coating based on a resin-coated nanoparticle composite structure is obtained; wherein, the preparation of the coating based on the resin-coated nanoparticle composite structure comprises the following steps:
adding fumed silica nanoparticles into absolute ethyl alcohol, and uniformly stirring to prepare fumed silica dispersion;
Adding perfluoro caprylic acid and sodium hydroxide into absolute ethyl alcohol, and uniformly stirring to prepare perfluoro caprylic acid sodium alcohol solution;
Adding chitosan quaternary ammonium salt water solution and prepared perfluoro sodium octoate ethanol solution into the prepared fumed silica dispersion liquid under the stirring state, and reacting to prepare the super oleophobic/super hydrophilic coating; and
And adding the super oleophobic/super hydrophilic coating into a resin glue solution, and uniformly stirring to prepare the coating with the resin-coated nano particle composite structure.
2. The preparation method according to claim 1, wherein the fumed silica nanoparticle has a specific surface area of 200m 2/g.
3. The production method according to claim 2, wherein the resin is a hydroxy acrylic resin.
4. The preparation method according to claim 3, wherein,
And adding chitosan quaternary ammonium salt into deionized water, and uniformly stirring to prepare the chitosan quaternary ammonium salt aqueous solution.
5. The production method according to claim 3, wherein the fumed silica particles have a concentration of 0.013g/ml.
6. The preparation method according to claim 3, wherein the mass ratio of the hydroxyacrylic resin to the fumed silica nanoparticle is 2:1.
7. The method of any one of claims 1-6, wherein the stainless steel substrate is a 100 mesh 304 stainless steel mesh.
8. A high durability oil-water separation net prepared by the preparation method of any one of claims 1 to 7.
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| Publication number | Priority date | Publication date | Assignee | Title |
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