CN116731586B - Multifunctional bionic structure surface and preparation method thereof - Google Patents
Multifunctional bionic structure surface and preparation method thereof Download PDFInfo
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- CN116731586B CN116731586B CN202310723588.2A CN202310723588A CN116731586B CN 116731586 B CN116731586 B CN 116731586B CN 202310723588 A CN202310723588 A CN 202310723588A CN 116731586 B CN116731586 B CN 116731586B
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- 239000011664 nicotinic acid Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 230000009467 reduction Effects 0.000 claims abstract description 62
- 239000003822 epoxy resin Substances 0.000 claims abstract description 28
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 28
- 239000011259 mixed solution Substances 0.000 claims abstract description 22
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000004014 plasticizer Substances 0.000 claims abstract description 20
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 230000002195 synergetic effect Effects 0.000 claims abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910021485 fumed silica Inorganic materials 0.000 claims abstract description 6
- 239000008096 xylene Substances 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims description 44
- 239000011248 coating agent Substances 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 15
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- 239000000758 substrate Substances 0.000 claims description 10
- 229920002545 silicone oil Polymers 0.000 claims description 8
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- FLKPEMZONWLCSK-UHFFFAOYSA-N diethyl phthalate Chemical compound CCOC(=O)C1=CC=CC=C1C(=O)OCC FLKPEMZONWLCSK-UHFFFAOYSA-N 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
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- 238000001914 filtration Methods 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
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- 239000003973 paint Substances 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical group OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 239000010702 perfluoropolyether Substances 0.000 claims description 2
- 229920002401 polyacrylamide Polymers 0.000 claims description 2
- 239000008029 phthalate plasticizer Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 12
- 239000012530 fluid Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
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- 238000010008 shearing Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 230000003373 anti-fouling effect Effects 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000178 monomer Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
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- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- XEFQLINVKFYRCS-UHFFFAOYSA-N Triclosan Chemical compound OC1=CC(Cl)=CC=C1OC1=CC=C(Cl)C=C1Cl XEFQLINVKFYRCS-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 229920006334 epoxy coating Polymers 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
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- 229960003500 triclosan Drugs 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 2
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- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 244000207740 Lemna minor Species 0.000 description 1
- 235000006439 Lemna minor Nutrition 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 235000001855 Portulaca oleracea Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
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- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
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- 239000000945 filler Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- -1 modified acrylic ester Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920001558 organosilicon polymer Polymers 0.000 description 1
- 125000005498 phthalate group Chemical group 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000747 poly(lactic acid) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention belongs to the technical field of ocean drag reduction materials, and particularly relates to a multifunctional bionic structure surface and a preparation method thereof, wherein the drag reduction effect of a drag reducer is combined with the characteristic of delaying boundary layer turbulence degree of a surface structure, the drag reducer and the surface structure are synergistic, a near-wall flow field is changed, the shearing force of a solid-liquid interface and the resistance of fluid to a ship are reduced, the drag reduction performance is improved, the composition of the bionic structure surface comprises 55-75% of epoxy resin mixed solution, 20-30% of curing agent and 5-10% of plasticizer, the epoxy resin mixed solution comprises 40-70%, 1-5%, 6-10% and 30-40% of epoxy resin, drag reducer, fumed silica and xylene, the bionic structure surface is provided with a micron-sized circular groove structure, the circular groove width D is 25-200 microns, the height-width ratio h/D is 0.2-0.5, and the spacing L is 0-200 microns; the preparation process is simple and convenient, has wide applicability and strong stability and durability, can be applied to surface drag reduction of underwater vehicles such as ships, reduces the underwater friction resistance of the shell, and reduces the sailing energy consumption.
Description
Technical field:
the invention belongs to the technical field of ocean drag reduction materials, and particularly relates to a bionic drag reduction coating with a micron-sized circular groove structure and a preparation method thereof, which achieve the purpose of drag reduction and reduce the resistance of fluid to ships.
The background technology is as follows:
the ship navigation process needs to overcome underwater resistance, and the drag reduction coating is coated on the surface of the ship body, so that the method is one of effective ways for reducing the underwater friction resistance of the ship body and improving the energy utilization rate and the navigation speed.
According to the construction mode, drag reduction materials in the prior art are mainly divided into two types: one type is a coating, which forms a drag reduction layer by spraying; the other is a film material, and a drag reduction layer is formed by applying. In terms of coating, chinese patent 201810105315.0 discloses an organosilicon drag reduction coating composition, which comprises components such as a basic organosilicon polymer, a reinforcing filler, a strong hydrophobic filler, pigment, a cross-linking agent, a catalyst accelerator, a tackifier, a solvent and the like, wherein the organosilicon drag reduction coating composition is split into two components, the materials of which the two components are uniformly mixed according to a proper proportion can be solidified at room temperature, the solidified materials can form reliable adhesion to various substrates such as metal, wood, concrete and the like, and a stable water-resistant low-surface-energy coating film is generated, and the water flow resistance of water flowing through the surface of the coating film is reduced; the reactive organopolysiloxane-based coating is prepared to be room-temperature curable, and forms a low-surface-energy drag-reduction coating on the surface of a substrate. The acrylic resin with the functions of inhibiting and releasing the offset disclosed in China patent 202211269379.7 is prepared by polymerizing the following raw materials in parts by weight: 3-7 parts of acrylate monomer containing triclosan anti-fouling active components, 5-15 parts of silicone oil modified acrylate monomer, 15-25 parts of triisopropyl silicone methacrylate, 10-20 parts of methyl methacrylate, 1-1.5 parts of initiator and 40-60 parts of organic solvent; the structural formula of the acrylate monomer containing the triclosan antifouling active component is shown as formula I: the structural formula of the silicone oil modified acrylic ester monomer is shown as formula II: in the formula II, R3 is H or methyl, and n is 20-35; the triclosan antifouling active group and the silicone oil group are grafted and introduced into the acrylic resin, and the triisopropyl methacrylate component is also introduced, so that the friction resistance between water flow and a coating interface is reduced. In the aspect of film materials, the preparation method of the super-hydrophobic anti-fouling drag-reducing material disclosed in China patent 202111224860.X comprises the following technical processes: firstly, preparing a bionic claw-shaped structure matrix by taking a high molecular substance as a raw material, then processing the bionic claw-shaped structure matrix by a method combining electroless plating and electrodeposition to metalize the surface of the bionic claw-shaped structure matrix and prepare a multi-level multi-scale millimeter-micrometer-nanometer multi-level structure on the surface of the bionic claw-shaped structure matrix, and finally, modifying the bionic claw-shaped structure matrix by a long-chain alkanoic acid soaking method to obtain the super-hydrophobic anti-fouling drag-reducing material; the designed super-hydrophobic material with a certain structural size and an arranged duckweed leaf surface structure is constructed into a millimeter-micrometer-nanometer multi-level multi-scale structure by utilizing surface coating treatment, and the super-hydrophobic drag reduction material is obtained by hydrophobization modification. The main structure of the bionic array structure surface antifouling and anti-drag material disclosed in China patent 202011275199.0 comprises an antifouling and anti-drag unit consisting of a head ring and a support column, wherein the head ring is arranged on the upper part, the support column is arranged on the lower part, and the head ring is in a crossed annular structure and consists of two rings which are vertically intersected; the support column is of a cylindrical structure, the inner diameter d1 of the circular ring is 10-1000 mu m, the outer diameter d2 of the circular ring is 4-1000 mu m larger than the inner diameter, the width I of the circular ring is 4-800 mu m, the diameter d of the support column is 5-2500 mu m, the height h of the support column is 20-1500 mu m, a plurality of anti-fouling drag reduction units are arranged in a matrix mode to form a surface structure layer, the horizontal spacing and the vertical spacing of two adjacent anti-fouling drag reduction units are the same, the spacing range is 20-2400 mu m, the surface structure layer is arranged on an upper substrate layer, a hydrophobic layer is arranged between the substrate layer and the surface structure layer, a modified layer is wrapped on the top of the surface structure layer, and the substrate layer and the surface structure layer are made of high polymer materials including but not limited by ABS resin, epoxy resin, acrylic resin, PLA resin and LCD resin; which utilizes an arrayed structure for drag reduction.
The coating and the membrane related to the patent have advantages and disadvantages, the drag reducer is easier to add and use, the special bionic surface microstructure is easier to construct, a certain drag reduction effect can be realized no matter the coating and the membrane, if the coating and the membrane can be combined, the drag reducer drag reduction and the bionic structure drag reduction are combined, the drag reduction effect is realized by the synergistic effect of the drag reducer drag reduction and the bionic structure drag reduction, and the drag reduction performance can be further improved.
The invention comprises the following steps:
the invention aims to overcome the defects in the prior art, and develops and designs an epoxy drag reduction coating added with a drag reducer and having a micron-sized bionic structure on the surface and a preparation method thereof, and the drag reduction performance is improved through the synergistic effect of the drag reducer and the bionic structure.
In order to achieve the aim, the multifunctional drag reduction coating with the bionic structure surface comprises 55-75% of epoxy resin mixed solution, 20-30% of curing agent and 5-10% of plasticizer in percentage by mass; the epoxy resin mixed solution consists of 40-70% of epoxy resin, 1-5% of drag reducer, 6-10% of fumed silica and 30-40% of dimethylbenzene according to the mass ratio, wherein the epoxy resin is one or more of EF organosilicon modified epoxy resin, E44 epoxy resin and E51 epoxy resin, and the drag reducer is one or more of hydroxyl silicone oil, dimethyl silicone oil, polyacrylamide, polyethylene oxide and perfluoropolyether; the curing agent is aliphatic amine curing agents such as polyamide, ethylenediamine, diethylenetriamine and the like; the plasticizer consists of 35-60% and 40-65% of plasticizer and dimethylbenzene, wherein the plasticizer is phthalate plasticizers such as di (2-ethylhexyl) phthalate, diethyl phthalate and the like.
The invention relates to a specific technical process of a multifunctional bionic structure surface preparation method, which comprises the following steps:
(1) Preparation of epoxy resin Mixed solution
Firstly, sequentially adding 40-70% of epoxy resin and 1-5% of drag reducer into a grinding dispersion container, adding fumed silica with 6-10% of mass ratio for 2-10 times, and adding xylene with 30-40% of mass ratio as a solvent in a stirring state;
then, placing the grinding dispersion container in a multifunctional dispersion stirrer, adding grinding beads for auxiliary grinding, and stirring for 1-3h under the condition of 400-800r/min to obtain a mixed solution;
finally, standing the mixed solution, and filtering the mixed solution by adopting a copper screen to obtain filtrate, namely the epoxy resin mixed solution;
(2) Preparation of plasticizers
Sequentially adding a plasticizer and dimethylbenzene with mass ratio of 35-60% and 40-65% into a container, placing into a multifunctional dispersing stirrer, and stirring for 1-3h at a rotating speed of 400-800r/min to obtain the plasticizer;
(3) Preparation of drag-reducing paint
And uniformly stirring and mixing the epoxy resin mixed solution, the curing agent and the plasticizer according to a set mass ratio to obtain the drag-reducing coating.
The invention relates to a multifunctional bionic structure surface, which is used when:
firstly, coating drag reduction coating on the surface of a substrate;
then, attaching a release film with an arrayed bionic structure to the surface of the drag reduction coating which is not completely cured, wherein the surface structure of the release film is a circular ridge array structure shown in the figure 1, the ridge width D is 25-200 micrometers, the ridge height-width ratio h/D is 0.2-0.5, and the distance L is 0-200 micrometers;
finally, the release film is removed after the surface of the drag reduction coating is solidified, a silicon oil layer is arranged on the surface of the release film, so that the silicon oil layer is easy to peel off, and the surface of the drag reduction coating is provided with a cooperative drag reduction coating with a micron-sized round groove structure as shown in figure 2, wherein the width D of the round groove is 25-200 microns, the height-width ratio h/D is 0.2-0.5, and the spacing L is 0-200 microns; the synergistic drag reduction coating has lower surface energy and better hydrophobicity due to the addition of the drag reducer, can reduce friction resistance when a ship sails, achieves the purpose of drag reduction, and has a micron-sized bionic structure on the surface, which imitates a marine organism surface groove structure, can change a near-wall surface flow field under water, reduces the shearing force of a solid-liquid interface, and further reduces the resistance of fluid to the ship.
Compared with the prior art, the epoxy coating based on the synergistic drag reduction of the drag reducer and the micron-sized circular groove structure and the preparation method thereof are provided, and the epoxy coating has lower surface energy and better hydrophobicity due to the addition of the drag reducer, has stronger bonding force with a matrix, is not easy to crack and fall off when soaked and washed by seawater, forms a thin layer when coated on the surface of a ship body, can change the fluid state of a solid-liquid interface, reduce the underwater friction resistance, has the micron-sized circular groove structure on the surface of the epoxy coating, can delay the turbulent flow intensity of an underwater boundary layer, change the flow field of a near-wall surface, reduce the shearing force of the fluid on the ship, and improve the drag reduction performance; the ship drag reduction agent has the advantages of simple components and reliable principle, improves the drag reduction function through the synergistic effect of the drag reduction agent and the surface structure, has application potential in the field of marine ship drag reduction, can reduce the friction resistance of the ship body in navigation, and improves the navigation speed.
Description of the drawings:
fig. 1 is a schematic view of the principle of the surface structure of a release film according to the present invention.
FIG. 2 is a schematic representation of the surface structure principle of the synergistic drag reducing coating of the present invention.
FIG. 3 is a graphical representation of drag reduction performance test results for drag reducing coatings in accordance with the present invention.
The specific embodiment is as follows:
the invention is further illustrated by the following examples in conjunction with the accompanying drawings.
Example 1:
the specific technical process of the multifunctional bionic structure surface preparation method related to the embodiment is as follows:
sequentially adding 48g of E44 epoxy resin and 2g of hydroxyl silicone oil into a tinplate grinding tank, adding 6g of fumed silica for 5 times, and adding 30g of dimethylbenzene as a solvent in a stirring state;
placing a tinplate grinding tank in a multifunctional dispersing stirrer, adding grinding beads for auxiliary grinding, and stirring for 2 hours under the condition of 400r/min of rotating speed to obtain a mixed solution;
standing the mixed solution, and filtering the mixed solution by adopting a copper screen to obtain filtrate, namely epoxy resin mixed solution;
taking 40g of di (2-ethylhexyl) phthalate and 58g of dimethylbenzene, sequentially adding into a tinplate grinding tank, placing into a multifunctional dispersing stirrer, and stirring for 2 hours at the rotating speed of 400r/min to obtain a plasticizer;
and uniformly stirring and mixing 50g of epoxy resin mixed solution, 20g of ethylenediamine and 6g of plasticizer to obtain the drag-reducing coating.
Example 2:
the embodiment relates to a preparation method of a drag reduction coating and microstructure synergistic drag reduction coating, the drag reduction coating prepared in the embodiment 1 is coated on the surface of a substrate in a brushing mode, a release film with a micron-sized ridge-shaped array structure is adhered on the surface of an uncured drag reduction coating, the ridge width D of a circular ridge-shaped array structure on the surface of the release film is 100 microns, the ridge height-width ratio h/D is 0.5, the distance L is 50 microns, and after the surface of the drag reduction coating is cured, the release film is peeled off, so that the drag reduction coating with a micron-sized circular groove structure can be formed on the surface of the drag reduction coating.
Example 3:
the present example relates to a drag reduction performance test of a drag reduction coating, in which a substrate coated with the drag reduction coating is mounted on a drag reduction test device, and a rotational torque is tested with reference to a national standard GB/T7791-2014 drag reduction performance test method of an anti-fouling paint, and the result is that the torque is reduced by 11.7% at 400rpm (relative flow rate 8 m/s) relative to a smooth substrate, as shown in fig. 3, and the drag reduction effect is remarkable.
Claims (7)
1. A method for preparing a multifunctional bionic structure surface is characterized in that,
firstly, coating drag reduction coating on the surface of a substrate;
then, attaching a release film with an arrayed bionic structure to the surface of the drag reduction coating which is not completely solidified, wherein the surface structure of the release film is a circular ridge array structure;
finally, taking down the release film after the surface of the drag reduction coating is solidified, wherein the surface of the release film is provided with a silicon oil layer, and the surface of the drag reduction coating is provided with a synergistic drag reduction coating with a micron-sized round groove structure;
the drag reduction coating consists of an epoxy resin mixed solution, a curing agent and a plasticizer, wherein the epoxy resin mixed solution consists of epoxy resin, a drag reducer, fumed silica and dimethylbenzene.
2. The method for preparing the multifunctional bionic structure surface according to claim 1, wherein the epoxy resin is one or two of E44 epoxy resin and E51 epoxy resin, and the drag reducer is one or more of hydroxyl silicone oil, dimethyl silicone oil, polyacrylamide, polyethylene oxide and perfluoropolyether.
3. The method for preparing a multifunctional bionic structure according to claim 1, wherein the curing agent is aliphatic amine curing agent.
4. The method for preparing a multifunctional bionic structure according to claim 1, wherein the plasticizer is phthalate plasticizer and contains xylene.
5. The method for preparing the multifunctional bionic structure surface according to claim 4, wherein the plasticizer comprises di (2-ethylhexyl) phthalate and diethyl phthalate, and the mass ratio of the plasticizer to the dimethylbenzene is 35-60% and 40-65%.
6. The method for preparing the multifunctional bionic structure surface according to claim 1, wherein the preparation process of the drag reduction coating comprises the following steps:
(1) Preparation of epoxy resin Mixed solution
Firstly, sequentially adding epoxy resin and a drag reducer into a grinding dispersion container, adding fumed silica for 2-10 times, and adding dimethylbenzene as a solvent under a stirring state;
then, placing the grinding dispersion container in a multifunctional dispersion stirrer, adding grinding beads for auxiliary grinding, and stirring for 1-3h under the condition of 400-800r/min to obtain a mixed solution;
finally, standing the mixed solution, and filtering to obtain filtrate, namely the epoxy resin mixed solution;
(2) Preparation of plasticizers
Sequentially adding a plasticizer and dimethylbenzene into a container, and then placing the container into a multifunctional dispersing stirrer, and stirring for 1-3 hours at the rotating speed of 400-800r/min to obtain the plasticizer;
(3) Preparation of drag-reducing paint
And uniformly stirring and mixing the epoxy resin mixed solution, the curing agent and the plasticizer to obtain the drag reduction coating.
7. The method for preparing a multifunctional bionic structure according to any one of claims 1 to 6, wherein the ridge width of the round ridge-shaped array structure and the width of the round groove structure are 25 to 200 micrometers, the aspect ratio is 0.2 to 0.5, and the pitch is 0 to 200 micrometers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310723588.2A CN116731586B (en) | 2023-06-19 | 2023-06-19 | Multifunctional bionic structure surface and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310723588.2A CN116731586B (en) | 2023-06-19 | 2023-06-19 | Multifunctional bionic structure surface and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116731586A CN116731586A (en) | 2023-09-12 |
| CN116731586B true CN116731586B (en) | 2024-04-12 |
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