CN118238992A - Deicing heterogeneous surface structure and preparation method thereof - Google Patents
Deicing heterogeneous surface structure and preparation method thereof Download PDFInfo
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- CN118238992A CN118238992A CN202410668281.1A CN202410668281A CN118238992A CN 118238992 A CN118238992 A CN 118238992A CN 202410668281 A CN202410668281 A CN 202410668281A CN 118238992 A CN118238992 A CN 118238992A
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- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000005871 repellent Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 10
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 10
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical group CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 9
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 8
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 8
- -1 polydimethylsiloxane Polymers 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 235000015243 ice cream Nutrition 0.000 claims 4
- 239000007858 starting material Substances 0.000 claims 1
- 230000002829 reductive effect Effects 0.000 abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 238000010008 shearing Methods 0.000 abstract description 7
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 125000005842 heteroatom Chemical group 0.000 description 3
- 239000011295 pitch Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 230000000670 limiting effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003075 superhydrophobic effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D15/00—De-icing or preventing icing on exterior surfaces of aircraft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/10—Manufacturing or assembling aircraft, e.g. jigs therefor
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Aviation & Aerospace Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Transportation (AREA)
- Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
Abstract
The invention relates to the technical field of aircraft deicing devices, in particular to a deicing heterogeneous surface structure and a preparation method thereof. According to the invention, the plurality of columns with higher relative elastic modulus are embedded in the ice-repellent layer with lower relative elastic modulus, so that the whole outer surface of the ice-repellent layer presents lower apparent elastic modulus, and the ice can slide and de-stick under lower shearing force; meanwhile, based on the difference of elastic modulus between the cylinder and the ice-dispersing layer, the ice body can be rapidly separated from the ice-removing heterogeneous surface structure under lower shearing force, so that the energy consumption of mechanical ice removing is reduced, and the mechanical ice removing efficiency is improved.
Description
Technical Field
The invention relates to the technical field of aircraft deicing devices, in particular to a deicing heterogeneous surface structure and a preparation method thereof.
Background
Aircraft icing is widely recognized as one of the major hazards of aviation flight. When an aircraft passes through a cloud layer of ice accumulation meteorological conditions, supercooled water drops in the cloud layer collide with the windward side of the aircraft, so that the surfaces of windward parts (wings, windshields, tail wings, engine lips, airspeed tubes and the like) of the aircraft are frozen, especially, the vicinity of stagnation points are frozen more seriously, and the aerodynamic performance of the aircraft is seriously affected by the icing of key parts of the aircraft, so that the safety performance of the aircraft is rapidly reduced. For example, the front edges of wings and tail wings are frozen, so that the aerodynamic shape of the aircraft can be changed to different degrees, the design rule of the aircraft is violated, the lift force is rapidly reduced, the resistance is rapidly increased, and the maneuvering performance and the stability performance of the aircraft are seriously affected. Therefore, how to construct an efficient ice control strategy has become a urgent problem to be solved in the flight process of an aircraft.
The main current ice control strategies include passive ice control methods and active ice control methods. The active deicing mode is generally a physical method (mechanical deicing or electric heating deicing prevention) and a chemical method (spraying of anti-icing agents such as saline water or ethylene glycol) and can solve the problem of ice accumulation to a certain extent, but the method has high cost in terms of energy, manpower and environment. In addition, the active technology is often difficult to realize due to environmental and energy limitations, complex surface structure and other factors, so that the ice control technology (namely, the passive deicing technology) without energy consumption is attracting a great deal of attention of researchers. The passive deicing technology is mainly realized based on the surface characteristics of materials, and mainly comprises two types: the surface frost or icing is delayed by inhibiting nucleation, and is typified by a superhydrophobic surface, but the surface micro-nano structure is extremely easy to damage, difficult to use for a long time, and can only inhibit icing to a certain extent, so that thorough ice prevention is not realized; another type of technology is called icephobic surfaces, in which the ice layer is easily separated from the surface under the action of external force (wind, self gravity force, etc.) by reducing the adhesion strength between ice and the surface.
The applicant found that in the process of realizing the present invention, the existing deicing technique has the problem of high mechanical deicing energy consumption.
Disclosure of Invention
The invention aims to provide a deicing heterogeneous surface structure and a preparation method thereof, which are used for solving the technical problems in the prior art and mainly comprise the following two aspects:
the invention provides a deicing heterogeneous surface structure, which comprises a substrate, wherein a working area is arranged on the substrate, an icephobic layer is arranged on the working area, a plurality of columns are embedded in the icephobic layer, fixed ends of the columns are connected with the substrate, free ends of the columns penetrate through the icephobic layer, and the elastic modulus of the columns is larger than that of the icephobic layer.
Further, the ice-repellent layer is a low-surface-energy modified high polymer material.
Further, the raw materials of the low-surface-energy modified high-molecular material comprise the following components in percentage by mass: 0.5-2: 0.04-0.08 of a component A, a component B and a component C, wherein the component A is polydimethylsiloxane, the component B is tetraethoxysilane or 1H, 2H-perfluoro decyl trimethoxysilane, and the component C is dibutyl tin dilaurate.
Further, the end face of the free end of the column body is positioned on the same plane with the outer surface of the icephobic layer;
or the free end face of the column body protrudes out of the outer surface of the ice-repellent layer;
Or the end face of the free end of the cylinder is concave on the outer surface of the icephobic layer.
Further, the cylinder is one of a cylinder, a prism, a cone, or a combination of at least two.
Further, the columns are arranged in an array, and the ratio of the diameter of the columns to the column spacing is 1: 1-8;
and/or the diameter of the column body is 0.3-0.8 mm;
And/or, the ratio of the diameter of the column to the height of the column is 1: 1-3.
Further, the column is metal or epoxy.
Further, the columns are metal, and the ratio of the diameter of the columns to the column spacing is 1: 2-4;
Or, the column is epoxy resin, and the ratio of the diameter of the column to the column spacing is 1: 1-3.
The second aspect of the invention provides a method for preparing the deicing heterogeneous surface structure, which comprises the following steps:
step S100, a matrix with a plurality of columns arranged on a working area is obtained;
step S200, manufacturing an ice-repellent layer in the working area of the substrate.
Further, before proceeding to step S200, the mass ratio is set to 10: 0.5-2: 0.04-0.08 of a component A, a component B and a component C are uniformly stirred and mixed to obtain a colloidal liquid for preparing an ice-repellent layer, wherein the component A is polydimethylsiloxane, the component B is tetraethoxysilane or 1H, 2H-perfluoro decyl trimethoxysilane, and the component C is dibutyltin dilaurate; in step S200, the colloidal liquid is poured into the working area and dried to obtain the deicing heterogeneous surface structure.
Compared with the prior art, the invention has at least the following technical effects:
according to the invention, the plurality of columns with higher relative elastic modulus are embedded in the ice-repellent layer with lower relative elastic modulus, so that the whole outer surface of the ice-repellent layer presents lower apparent elastic modulus, and the ice can slide and de-stick under lower shearing force; meanwhile, based on the difference of elastic modulus between the column body and the ice-dispersing layer, the ice body can be rapidly separated from the ice-removing heterogeneous surface structure under lower shearing force, so that the energy consumption of mechanical ice removal is reduced, and the mechanical ice removal efficiency is improved; in addition, the column body with higher relative elastic modulus can provide a firm framework for the icephobic layer with lower relative elastic modulus, plays a certain reinforcing effect, and can also avoid the problem that internal defects are generated by introducing holes into the icephobic layer in the process of preparing the icephobic layer.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the embodiments of the present invention or the drawings used in the description of the prior art, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a deicing heterostructure according to the present invention;
FIG. 2 is an exploded view of the deicing heterogeneous surface structure of the present invention;
FIG. 3 is a schematic illustration of the internal structure of the deicing heterostructure of the present invention;
FIG. 4 is a schematic diagram of the structure of the deicing heterostructure of the present invention in performing mechanical deicing;
FIG. 5 is a schematic diagram of the structure of the present invention in the use of mold assist in the fabrication of deicing heterosurface structures;
in the figure, 10, a substrate; 110. a column; 20. an ice-repellent layer; 30. an ice body; 40. cracking; 50. and (5) a mold.
Detailed Description
The following description provides many different embodiments, or examples, for implementing different features of the invention. The elements and arrangements described in the following specific examples are presented for purposes of brevity and are provided only as examples and are not intended to limit the invention.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
Example 1
The utility model provides a deicing heterogeneous surface structure, shown in fig. 1~3, includes base member 10, be provided with the workspace on the base member 10, the workspace can be indent in the base member 10 surface, and the workspace also can be outstanding in the base member 10 surface, be equipped with on the workspace and dredge ice layer 20, dredge ice layer 20 can cover the workspace completely, also can cover partial workspace, the embedded a plurality of cylinders 110 that are equipped with of ice layer 20, the stiff end and the base member 10 of cylinder 110 are connected, and the free end of cylinder 110 passes and dredges ice layer 20, and the elastic modulus of cylinder 110 is greater than the elastic modulus of ice layer 20.
The adhesion strength of the ice body on the surface of the material is closely connected with the molecular acting force between interfaces and is closely related to the structural characteristics of the surface of the material, and in the embodiment, a plurality of cylinders 110 with higher relative elastic modulus are embedded in the icephobic layer 20 with lower relative elastic modulus, so that the whole outer surface of the icephobic layer 20 presents lower apparent elastic modulus, and the ice body can slide and de-stick under lower shearing force; when the ice-removing heterogeneous surface structure is frozen on the outer surface of the ice-dispersing layer 20, the interface contacted with the ice body comprises the ice-dispersing layer 20 material and the free end of the cylinder 110, and when mechanical ice removal is required to be carried out on the outer surface of the ice-dispersing layer 20, as the difference exists between the molecular acting forces of the ice-dispersing layer 20 and the cylinder 110 and the molecular acting forces of the ice body respectively, when the ice body is subjected to shearing force, the stress distribution condition between the ice body and the ice-removing heterogeneous surface structure corresponds to the distribution condition of the cylinder 110 and is subjected to the difference of the elastic modulus between the cylinder 110 and the ice-dispersing layer 20, so that uneven deformation is generated between the ice body and the cylinder 110 and between the ice body and the ice-dispersing layer 20 material, and cracks are generated at the contact position of the ice body and the ice-dispersing layer 20 material, as shown in fig. 4, the contact interface of the ice body 30 and the ice-dispersing heterogeneous surface structure is reached, meanwhile, the cracks 40 are generated at multiple points, and the subsequent cracks 40 can rapidly expand along the outer surface of the ice-dispersing layer 20 due to the stress concentration, the actual bonding area between the ice body 30 and the ice-removing heterogeneous surface structure is reduced, the ice-removing bonding area between the ice body 30 and the ice-removing heterogeneous structure is rapidly carried out, the ice-removing adhesive strength of the ice body 30 is reduced, and the ice-removing mechanical ice-removing efficiency is rapidly is reduced, and the ice-removing efficiency is ice-removing from the heterogeneous structure; in addition, the column 110 with higher relative elastic modulus can provide a firm framework for the icephobic layer 20 with lower relative elastic modulus, has a certain reinforcing effect, and can avoid the problem that internal defects are generated due to the introduction of holes inside the icephobic layer 20 in the process of preparing the icephobic layer 20.
The substrate 10 may be a housing for preventing and removing ice, and the object for preventing and removing ice may be an apparatus having a demand for preventing and removing ice, such as an aircraft, an automobile, a ship, or a spacecraft, and in this embodiment, the object for removing ice is an aircraft, and the substrate 10 may be provided as a housing including a functional module for mechanically removing ice, or may be a separate housing, and the shape of the housing is not specifically limited in this embodiment (the functional module for mechanically removing ice is a prior art, and is not described here).
Specifically, the icephobic layer 20 is a low-surface-energy modified polymer material, so that the binding force between the material of the icephobic layer 20 and the ice body 30 is reduced during icing, and the ice body 30 is easy to slip and debond on the icephobic layer 20.
Specifically, the icephobic layer 20 includes the following raw materials in mass ratio of 10: 0.5-2: 0.04-0.08 of a component A, a component B and a component C, wherein the component A is polydimethylsiloxane, the component B is tetraethoxysilane or 1H, 2H-perfluoro decyl trimethoxysilane, and the component C is dibutyl tin dilaurate.
In order to facilitate the ice body 30 to slide and debond on the icephobic layer 20, the end face of the free end of the cylinder 110 and the outer surface of the icephobic layer 20 may be disposed on the same plane, so as to reduce the influence of the cylinder 110 on the apparent modulus of the icephobic layer 20, and make the whole outer surface of the icephobic layer 20 exhibit a lower apparent elastic modulus, which is beneficial to the ice body 30 to slide and debond under a smaller shearing force.
In some embodiments, to accommodate the crack effect due to the difference in elastic modulus between the pillars 110 and the icephobic layer 20, the free end face of the pillars 110 may be provided to protrude from the outer surface of the icephobic layer 20.
In some embodiments, to accommodate the crack effect due to the difference in elastic modulus between the columns 110 and the icephobic layer 20, the free end faces of the columns 110 may be recessed into the outer surface of the icephobic layer 20.
Specifically, the cylinder 110 is one of a cylinder, a prism, a cone, or a combination of at least two.
In order to further reduce the energy consumption of mechanical deicing, the columns 110 may be arranged in an array, where the ratio of the diameter of the columns 110 to the column spacing is 1: 1-8, wherein the column spacing is a spacing value between two adjacent columns 110; the diameter of the cylinder 110 is preferably controlled to be 0.3-0.8 mm, and the ratio of the diameter of the cylinder to the height of the cylinder is 1: 1-3, the adhesion strength of the deicing heterogeneous surface structure can be smaller than 30kPa, and the surface requirement of low ice adhesion strength is met.
In some embodiments, where the columns 110 may be provided as metal, the diameter of the columns 110 and the column spacing ratio may be controlled to be 1: 2-4, so as to reduce the energy consumption of mechanical deicing, wherein the metal can be a common shell material of stainless steel, aluminum alloy and other airplane and ship equipment, and even when the column 110 and the matrix 10 are both made of aluminum alloy, the icephobic layer 20 adopts the following materials in mass ratio of 10:1: when the polydimethylsiloxane, the ethyl orthosilicate and the dibutyl tin dilaurate are used for 0.06, the adhesion strength of the deicing heterogeneous surface structure is smaller than 10kPa, and the self-disengaging effect of the ice body 30 under the action of external force (wind, self gravity and other force fields) is achieved.
In some embodiments, the columns 110 may be provided as epoxy, and the diameter of the columns 110 and the column spacing ratio may be controlled to be 1: 1-3, so as to reduce the energy consumption of mechanical deicing, even when the column 110 and the matrix 10 are both made of epoxy resin, the icephobic layer 20 adopts the following mass ratio of 10:1: the adhesion strength of the deicing heterogeneous surface structure can be less than 30kPa when the polydimethylsiloxane, the ethyl orthosilicate and the dibutyl tin dilaurate are 0.06, and the surface standard of low ice adhesion strength can be achieved.
Test example 1
A method of preparing a deicing heterostructure as in example 1, comprising the steps of:
step S100, a matrix 10 with a plurality of columns 110 arranged on a working area is obtained, the columns 110 and the matrix 10 are made of epoxy resin, the diameter of each column 110 is 0.5mm, the height of each column 110 is 1.0mm, and the column spacing is 0.5mm;
step S200, pouring the colloidal liquid into the working area (as shown in FIG. 5, the colloidal liquid can be poured into the working area with the aid of the mold 50), and standing for a period of time to uniformly distribute the colloidal liquid in the working area and ensure the surface to be flat; and then drying the material in an oven at the temperature of 60 ℃ for 3-5 hours to obtain the deicing heterogeneous surface structure. The colloidal liquid is prepared by mixing the following components in percentage by mass: 1:0.06, a component A, a component B and a component C are uniformly stirred and mixed on a rapid mixer to obtain a colloidal liquid for preparing an ice-repellent layer, wherein the component A is Polydimethylsiloxane (PDMS), the component B is tetraethyl orthosilicate (TEOS), and the component C is dibutyltin dilaurate.
Test example 2
The preparation method of the deicing hetero surface structure in example 1 was carried out separately from test example 1 with control column pitches of 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0 mm.
Test example 3
A method of preparing a deicing heterostructure as in example 1, differing from test example 1 in that both the columns 110 and the substrate 10 are aluminum alloys.
Test example 4
The preparation method of the deicing hetero surface structure in example 1 was carried out separately from test example 3 with control column pitches of 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0 mm.
Test example 5
A method of preparing a deicing heterogeneous surface structure as in example 1, said component B being 1h,2 h-perfluorodecyl trimethoxysilane (FAS), differing from test example 3.
Test example 6
The preparation method of the deicing hetero surface structure in example 1 was carried out separately from test example 5 with control column pitches of 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0 mm.
The deicing heterogeneous surface structures prepared in test examples 1 to 6 were subjected to icing adhesion strength test (the test conditions of icing adhesion strength test are that the deicing heterogeneous surface structure is firstly frozen in a cold environment at-30 ℃ and then tested in a cold environment at-25 ℃, ice cubes bound on the surface of a test piece are pushed in parallel by a sliding knife with a force sensor during the test, and the maximum force of the ice cubes when peeled (or broken) is tested, the ratio of the force to the icing area is used for representing the ice adhesion strength of the surface of a material), and the results are shown in table 1,
TABLE 1 icing adhesion Strength Table for deicing heterogeneous surface structures
。
As can be seen from table 1, the adhesion strength of the prepared deicing heterogeneous surface structure is less than 30kPa, and the surface standard of low ice adhesion strength is reached; the deicing heterogeneous surface structure prepared by adopting the aluminum alloy column body can obtain more excellent performance on icing adhesion, so that the energy consumption of mechanical deicing can be further reduced, the mechanical deicing efficiency is improved, and particularly, the ratio of the diameter of the column body to the spacing of the column body is controlled at 1: and 4, the adhesion strength of the deicing heterogeneous surface structure is less than 10kPa (aluminum alloy column, PDMS and FAS), and the self-disengaging effect of the ice body under the action of external force (wind, self gravity and other force fields) can be achieved.
Comparative example
The preparation method of the deicing heterogeneous surface structure is different from test example 1 in that no column is arranged in the working area of the matrix. The ice adhesion test is carried out on the prepared ice-removing heterogeneous surface structure, the adhesion of the ice-removing heterogeneous surface structure is measured to be more than 200kPa, and compared with the ice-removing heterogeneous surface structure prepared in the test example 1, the ice-removing heterogeneous surface structure can be seen to effectively reduce ice adhesion.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (10)
1. The utility model provides a deicing heterogeneous surface structure, its characterized in that, includes the base member, be provided with the workspace on the base member, be equipped with the ice cream layer on the workspace, the embedded a plurality of cylinders that are equipped with of ice cream layer, the stiff end and the base member of cylinder are connected, and the free end of cylinder passes the ice cream layer, and the elastic modulus of cylinder is greater than the elastic modulus of ice cream layer.
2. Deicing heterostructure according to claim 1, characterized in that the icephobic layer is a high molecular material modified with low surface energy.
3. Deicing heterostructure according to claim 2, characterized in that the starting materials of the low surface energy modified polymeric material comprise a mass ratio of 10: 0.5-2: 0.04-0.08 of a component A, a component B and a component C, wherein the component A is polydimethylsiloxane, the component B is tetraethoxysilane or 1H, 2H-perfluoro decyl trimethoxysilane, and the component C is dibutyl tin dilaurate.
4. Deicing heterostructure according to claim 1, characterized in that the free end face of the cylinder is in the same plane as the outer surface of the icephobic layer;
or the free end face of the column body protrudes out of the outer surface of the ice-repellent layer;
Or the end face of the free end of the cylinder is concave on the outer surface of the icephobic layer.
5. Deicing heterostructure according to claim 1, characterized in that the cylinder is one or a combination of at least two of a cylinder, a prism, a cone.
6. Deicing heterogeneous surface structure as claimed in any one of claims 1-5, characterized in that the columns are arranged in an array, the ratio of diameter of the columns to column spacing being 1: 1-8;
and/or the diameter of the column body is 0.3-0.8 mm;
And/or, the ratio of the diameter of the column to the height of the column is 1: 1-3.
7. Deicing heterostructure according to claim 6, characterized in that the columns are metal or epoxy.
8. Deicing heterostructure according to claim 7, characterized in that the columns are metal and the ratio of diameter of the columns to column spacing is 1: 2-4;
Or, the column is epoxy resin, and the ratio of the diameter of the column to the column spacing is 1: 1-3.
9. A method of preparing a deicing heterostructure according to any one of claims 1 to 8, comprising the steps of:
step S100, a matrix with a plurality of columns arranged on a working area is obtained;
step S200, manufacturing an ice-repellent layer in the working area of the substrate.
10. The method of claim 9, wherein the mass ratio is 10: 0.5-2: 0.04-0.08 of a component A, a component B and a component C are uniformly stirred and mixed to obtain a colloidal liquid for preparing an ice-repellent layer, wherein the component A is polydimethylsiloxane, the component B is tetraethoxysilane or 1H, 2H-perfluoro decyl trimethoxysilane, and the component C is dibutyltin dilaurate; in step S200, the colloidal liquid is poured into the working area and dried to obtain the deicing heterogeneous surface structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202410668281.1A CN118238992B (en) | 2024-05-28 | 2024-05-28 | Deicing heterogeneous surface structure and preparation method thereof |
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| CN202410668281.1A CN118238992B (en) | 2024-05-28 | 2024-05-28 | Deicing heterogeneous surface structure and preparation method thereof |
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| CN118238992A true CN118238992A (en) | 2024-06-25 |
| CN118238992B CN118238992B (en) | 2024-08-06 |
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| CN202410668281.1A Active CN118238992B (en) | 2024-05-28 | 2024-05-28 | Deicing heterogeneous surface structure and preparation method thereof |
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