CN116351679A - Low-energy-consumption deicing material with low-interface toughness coating coupled with electric pulse and preparation method thereof - Google Patents

Low-energy-consumption deicing material with low-interface toughness coating coupled with electric pulse and preparation method thereof Download PDF

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Publication number
CN116351679A
CN116351679A CN202310314605.7A CN202310314605A CN116351679A CN 116351679 A CN116351679 A CN 116351679A CN 202310314605 A CN202310314605 A CN 202310314605A CN 116351679 A CN116351679 A CN 116351679A
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low
deicing
electric pulse
coating
interface toughness
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沈一洲
贺俊健
吴炳泉
王喆
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64DEQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D15/00De-icing or preventing icing on exterior surfaces of aircraft
    • B64D15/16De-icing or preventing icing on exterior surfaces of aircraft by mechanical means
    • B64D15/163De-icing or preventing icing on exterior surfaces of aircraft by mechanical means using electro-impulsive devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00Processes for applying liquids or other fluent materials
    • B05D1/02Processes for applying liquids or other fluent materials performed by spraying
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/002Pretreatement
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/007After-treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64CAEROPLANES; HELICOPTERS
    • B64C1/00Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00Materials not provided for elsewhere
    • C09K3/18Materials not provided for elsewhere for application to surfaces to minimize adherence of ice, mist or water thereto; Thawing or antifreeze materials for application to surfaces
    • C09K3/185Thawing materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00Metallic substrate
    • B05D2202/20Metallic substrate based on light metals
    • B05D2202/25Metallic substrate based on light metals based on Al
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64CAEROPLANES; HELICOPTERS
    • B64C1/00Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
    • B64C2001/0054Fuselage structures substantially made from particular materials

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

The invention provides a low-energy-consumption deicing material with low-interface toughness coating coupled with electric pulse and a preparation method thereof; the material comprises a low interface toughness coating, a base material layer and an electric pulse coil which are sequentially formed from top to bottom. The invention combines the characteristics of active deicing and passive deicing, simultaneously utilizes the low solid-ice interface fracture toughness of the low-interface toughness coating, has great advantages in large-area deicing, combines electric pulse deicing, and enables the base plate to vibrate through the strong electromagnetic force generated between the electric pulse coil and the base plate, thereby greatly reducing the external force for removing the surface ice layer. In addition, the electric pulse deicing of the material provided by the invention realizes high-efficiency deicing, and meanwhile, the generated energy consumption is lower, the structure is simple, the material is suitable for changeable and complex flight environments, and the material has important significance for the technical development of low-energy high-efficiency large-area surface deicing.

Description

Low-energy-consumption deicing material with low-interface toughness coating coupled with electric pulse and preparation method thereof
Technical Field
The invention relates to the technical field of deicing materials; in particular to a low-energy-consumption deicing material with low interface toughness coating coupled with electric pulse and a preparation method thereof.
Background
Supercooled liquid drops contained in the cloud layer can be quickly frozen into ice on the surface of the aircraft, so that the aerodynamic appearance of the aircraft is seriously damaged, surrounding airflow is disturbed, the lift-drag ratio of the aircraft is reduced, the operability of the aircraft is reduced, and the flight safety is seriously influenced.
Currently, aircraft anti/deicing systems may be specifically classified into active deicing systems and passive anti-icing systems. Active deicing techniques are those that perform deicing after icing, i.e., that allow a small amount of icing to be removed periodically, such as thermal and mechanical deicing techniques. The passive anti-icing technology is to prevent icing before icing, i.e. icing phenomena such as super-hydrophobic surface anti-icing technology and low-interface toughness surface anti-icing technology are not allowed to occur in the flight process. Thermal deicing includes gas-thermal deicing, electrothermal deicing, etc., and is mainly removed by transferring heat to melt an ice layer; the mechanical deicing comprises electric pulse deicing, electric pulse deicing and the like, and the ice layer is fallen off by producing mechanical vibration through elements such as an electric pulse coil or an electric pulse coil and the like; the superhydrophobic surface has a larger contact angle and a smaller rolling angle, so that the ice adhesion force can be effectively reduced and the icing time can be delayed; the low-interface toughness coating reduces the interface fracture toughness by inducing the surface of the material to form ice-fixing interface microcracks, so that the microcracks are rapidly expanded under the action of lower deicing external force, and the deicing external force can be obviously reduced in the deicing process of a large-surface structure.
The electric pulse deicing is based on the eddy current principle, when the capacitor discharges, the aircraft skin can generate eddy current under the induction of the electrified coil, and because the discharge time is short, the coil can quickly pass through extremely large current, and according to the law of electromagnetic induction, electromagnetic force can be generated between the skin and the pulse coil, the electromagnetic force acts on the skin to enable the skin to generate a small displacement, but due to the fact that the instantaneous acceleration is very large, the ice layer on the surface can be vibrated and broken, and finally the ice layer can be separated from the surface under the action of air flow.
At present, the combined deicing research of active deicing and passive anti-icing is relatively less, and the electric pulse deicing is widely applied to deicing of a deicing component due to the advantages of low energy consumption, high deicing efficiency, simple structure, easiness in maintenance and the like, but the existence of deicing energy consumption is still a non-negligible problem, especially the deicing of a large-area structure is not facilitated, and a low-interface toughness coating has low solid-ice interface fracture toughness, can induce crack initiation and propagation to perform deicing, and still needs a certain external force to enable an ice layer to fall off.
Disclosure of Invention
The invention aims to provide a low-energy-consumption deicing material with low-interface toughness coating coupled with electric pulses and a preparation method thereof.
The invention is realized by the following technical scheme:
the invention relates to a low-energy-consumption deicing material with low-interface toughness coating coupled with electric pulse, which comprises the following components: the low interface toughness coating, the base material layer and the electric pulse coil are sequentially formed from top to bottom.
Preferably, the low-interface toughness coating is any low-interface toughness material such as PTFE, porous PDMS or PDMA.
Preferably, the substrate material layer is an aluminum alloy material substrate.
Preferably, the capacitance of the electrical pulse coil is 1500 μf.
Preferably, the distance between the electric pulse coil and the substrate material layer is 0mm, 1mm or 2mm.
Preferably, the electric pulse coil has the dimensions of 4mm in inner diameter, 60mm in outer diameter or 4mm in inner diameter and 80mm in outer diameter.
The invention also relates to a preparation method of the low-energy-consumption deicing material with the low-interface toughness coating coupled with the electric pulse, which comprises the following steps:
step 1, preprocessing a substrate: carrying out sand blasting, anodic oxidation and roughening on a substrate material, cleaning and drying for later use;
step 2, mixing the low-interface toughness coating polymer precursor, the binder and the auxiliary agent, preparing a base material, and stirring;
step 3, spraying the base material prepared in the step 2 on the surface of the base material pretreated in the step 1, finally solidifying, and cooling to obtain a base material layer covered with a low-interface toughness coating;
and 4, fixing the electric pulse coil on the bottom of the base material layer covered with the low-interface toughness coating.
Preferably, in the step 1, the oxide skin is removed by sand paper, the greasy dirt is removed by acetone, the ultrasonic cleaning is carried out for 20min, and finally, the cleaning is carried out by distilled water and absolute ethyl alcohol, and the drying is carried out at low temperature.
Preferably, in step 2, the mass ratio of the polymer precursor, the binder and the auxiliary agent is 6:6:1.
Preferably, in step 2, the binder is aluminum dihydrogen phosphate with a purity of 40%.
Preferably, in the step 3, the spraying pressure is 0.25MPa, the curing temperature is 350 ℃, and the spraying treatment is to spray at a position 10cm away from the surface of the substrate material layer by using a spray gun with a nozzle diameter of 2mm.
Further, when the low-interface-toughness coating of the present invention is used to couple low-energy deicing materials of electric pulses, it is preferable to adjust the magnitude of the capacitor charging voltage in the electric pulse coil to 300V, 400V, 500V, etc.
The low-interface toughness coating provided by the invention is prepared from any of the low-interface toughness coating materials, namely the low-interface toughness coating materials meet the requirements.
The coating has the characteristics of reducing ice adhesion strength and delaying icing time of a superhydrophobic surface, can induce the generation of microcracks due to low solid-ice interface fracture toughness, can realize rapid expansion of microcracks under the action of lower deicing external force, and meanwhile, the research shows that the deicing external force is kept unchanged within a certain range along with the increase of the deicing area, and is not influenced by area change, so that the coating with low interface toughness has unique advantages for deicing of a large-area structure.
For electric pulse deicing, the impact of an electric pulse coil fixed on the lower part of the substrate material layer is relied on to cause the substrate material to vibrate, and for the substrate material layer, the size and effect of the vibration can be influenced by the size of the electric pulse coil and the interval between the coil and the substrate material layer, and the degree of the vibration can directly influence the deicing effect. Therefore, in order to achieve better deicing effect, the invention designs reasonable electric pulse coil size and distance between base material layers (aluminum alloy material substrates). In addition, with electric pulse deicing, a power supply is required to charge the capacitor, and in order to meet the requirement of low energy consumption, a reasonable charging voltage is required to be regulated.
The invention uses the low-interface toughness coating to couple the electric pulse deicing from the aspect of combining the active deicing with the passive anti-icing, so that the problems of high energy consumption of the active deicing and external deicing force involved in the deicing of a large-area structure when the passive anti-icing is finished can be effectively solved, and the purposes of large-area, low energy consumption and high-efficiency deicing are realized.
The invention has the following advantages:
(1) The low-energy-consumption deicing method for coupling the low-interface toughness coating with the electric pulse combines the characteristics of high electric pulse deicing efficiency and simple structure with the advantages of the low-interface toughness coating for deicing a large-area structure, combines the active deicing technology with the passive anti-icing technology, can realize low-energy-consumption, high-efficiency and large-area deicing, effectively reduces deicing external force and is simple to operate.
(2) The invention applies the low-interface toughness coating on the deicing surface, can induce the generation and the rapid expansion of microcracks due to the low solid-ice interface fracture toughness, and can prevent the deicing external force from being influenced by the area within a certain range along with the increase of the deicing area, so that the deicing external force can be obviously reduced by means of the low-interface toughness coating when the deicing is applied to large-area deicing, and the substrate plate can vibrate due to the strong electromagnetic force generated between the electric pulse coil and the substrate plate in combination with the electric pulse deicing, thereby greatly reducing the external force for removing the surface ice layer, and having more obvious advantages.
(3) The invention utilizes the electric pulse deicing to have lower energy consumption, combines the low-interface toughness coating, can remarkably reduce the energy consumption, has lower energy consumption compared with electrothermal deicing or simple electric pulse deicing, can meet the requirement of low-energy deicing of the surface of an airplane, effectively improves the deicing efficiency, can be suitable for changeable and complex flight environments, and has important significance for the technical development of low-energy efficient large-area surface deicing.
Drawings
FIG. 1 is a schematic process flow diagram of a low energy consumption deicing method for low interface toughness coating coupled electrical pulses in accordance with the present invention;
FIG. 2 is a schematic diagram of the structure of a finished product of a low energy deicing method of low interface toughness coating coupled with electric pulses according to the present invention;
FIG. 3 is a schematic view of different sizes of electrical pulse coils and different plate spacings according to the present invention; wherein (a) is 80mm in outer diameter and 2mm in plate spacing, (b) is 60mm in outer diameter and 2mm in plate spacing, (c) is 60mm in outer diameter and 0mm in plate spacing, (d) is 80mm in outer diameter and 0mm in plate spacing;
fig. 4 is a schematic diagram of a self-made ice adhesion test apparatus according to the present invention:
the attached drawings are identified:
1 is a low-interface toughness coating, 2 is a substrate material layer, 3 is an electric pulse coil, 4 is a test bench, 5 is a slide rail, 6 is a dynamometer, 7 is an aluminum alloy substrate coated with the low-interface toughness coating, 8 is an ice layer, and 9 is a clamp.
Detailed Description
The present invention will be described in detail with reference to specific examples. It should be noted that the following examples are only further illustrative of the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
This embodiment relates to a low energy deicing material that relies on a low interface toughness coating to couple electrical pulses, as shown in FIG. 2; comprising the following steps: the coating 1 with low interface toughness, the base material layer 2 and the electric pulse coil 3 are sequentially arranged from top to bottom;
the low-interface toughness coating 1 is PTFE;
the base material layer 2 is an aluminum alloy material substrate;
the electric pulse coil 3 is positioned below the substrate material layer
The preparation method of the low-energy-consumption deicing of the low-interface toughness coating is shown in fig. 1, and comprises the following steps:
step 1, selecting a 6061 type aluminum block as a base material, cutting an aluminum plate into samples with the thickness of 3mm and the diameter of 80mm, and carrying out sand blasting and anodic oxidation treatment on the surfaces of the samples.
And 2, polishing the surface of the sample by using sand paper to remove oxide skin, removing oil stains by using acetone, treating the sample by using an ultrasonic cleaner for 20min, and finally cleaning the surface by using distilled water and absolute ethyl alcohol and drying at a low temperature.
Step 3, preparing PTFE base material (30% PTFE, 30% AP, 15% Al) 2 O 3 5% of auxiliary agent), and stirring thoroughly for 2h.
And 4, spraying a PTFE base material on the surface of the aluminum plate, solidifying at 350 ℃, and finally cooling to room temperature along with a furnace to obtain the base material coated with the PTFE low-interface toughness coating.
And 5, selecting an electric pulse coil with the size of 4mm in inner diameter and 60mm in outer diameter, fixing the electric pulse coil at the bottom of a base material layer coated with a low-interface toughness coating, connecting a power supply to charge a capacitor at the plate spacing of 0mm, discharging the coil after the charging is finished, and vibrating the base material by electromagnetic force impact.
Step 6, according to the size of vibration and the deicing effect, the position and the plate spacing of an electric pulse coil are adjusted by measuring the deicing external force required by coupling the electric pulse of the low-interface ductile coating, so that the deicing effect reaches an optimal state, namely an optimal deicing mode; the external force required for removing the ice layer, namely deicing external force, is measured through a self-made ice adhesion experimental device, the experimental device is shown in fig. 3 (c) and fig. 4, 4 is a test bed, the fixture 9 is used for fixing the aluminum alloy substrate 7 covered with the low-interface toughness coating, the sliding rail 5 moves forwards to drive the dynamometer 6 to push the ice layer 8, and the stress of the broken ice layer is recorded. Under the same experimental conditions, the external deicing force of the coating material with low interface toughness coated on the surface is 83N, the external deicing force of the coating material with low interface toughness coated on the surface is 164N, and the external deicing force of the coating material with low interface toughness coated on the surface is 58N.
And 7, selecting an optimal deicing mode, adjusting the charge voltage of the capacitor, measuring deicing external force under different voltages, and selecting the voltage at which the minimum deicing external force can be removed by the ice layer. In this embodiment, the charging voltage of the capacitor is adjusted to 300V, the deicing effect is further observed, and the deicing external force is measured. At this time, the energy consumption is reduced by 40% compared with the electric heating deicing consumption, and by 32% compared with the deicing consumption relying on electric pulses alone.
Example 2
The embodiment relates to a low-energy-consumption deicing material with low-interface toughness coating coupled with electric pulses, which is shown in fig. 2; comprising the following steps: the coating 1 with low interface toughness, the base material layer 2 and the electric pulse coil 3 are sequentially arranged from top to bottom;
the low-interface toughness coating 1 is PTFE;
the base material layer 2 is an aluminum alloy material substrate;
the electric pulse coil 3 is positioned below the substrate material layer
The preparation method of the low-energy-consumption deicing of the low-interface toughness coating is shown in fig. 1, and comprises the following steps:
step 1, selecting a 6061 type aluminum block as a base material, cutting an aluminum plate into samples with the thickness of 3mm and the diameter of 80mm, and carrying out sand blasting and anodic oxidation treatment on the surfaces of the samples.
And 2, polishing the surface of the sample by using sand paper to remove oxide skin, removing oil stains by using acetone, treating the sample by using an ultrasonic cleaner for 20min, and finally cleaning the surface by using distilled water and absolute ethyl alcohol and drying at a low temperature.
Step 3, preparing PTFE base material (30% PTFE, 30% AP, 15% Al) 2 O 3 5% of auxiliary agent), and stirring thoroughly for 2h.
And 4, spraying a PTFE base material on the surface of the aluminum plate, solidifying at 350 ℃, and finally cooling to room temperature along with a furnace to obtain the base material coated with the PTFE low-interface toughness coating.
And 5, selecting an electric pulse coil with the size of 4mm in inner diameter and 60mm in outer diameter, fixing the electric pulse coil at the bottom of a base material layer coated with a low-interface toughness coating, connecting a power supply to charge a capacitor at a plate spacing of 2mm, discharging the coil after the charging is finished, and vibrating the base material by electromagnetic force impact.
Step 6, according to the vibration and the deicing effect, adjusting the position and the plate spacing of the electric pulse coil by measuring the deicing external force based on the coupling electric pulse and the low-interface toughness coating, so that the deicing effect reaches an optimal state, namely an optimal deicing mode; the external force required for removing the ice layer, namely deicing external force, is measured through a self-made ice adhesion experimental device, the experimental device is shown in fig. 3 (b) and fig. 4, 4 is a test bed, the fixture 9 is used for fixing the aluminum alloy substrate 7 covered with the low-interface toughness coating, the sliding rail 5 moves forwards to drive the dynamometer 6 to push the ice layer 8, and the stress of the broken ice layer is recorded. Under the same experimental conditions, the external deicing force of the coating material with low interface toughness coated on the surface is 83N, the external deicing force of the coating material with low interface toughness coated on the surface is 164N, and the external deicing force of the coating material with low interface toughness coated on the surface is 63N.
And 7, selecting an optimal deicing mode, adjusting the charge voltage of the capacitor, measuring deicing external force under different voltages, and selecting the voltage at which the minimum deicing external force can be removed by the ice layer. In this embodiment, the charging voltage of the capacitor is adjusted to 300V, the deicing effect is further observed, and the deicing external force is measured. At this time, the energy consumption is reduced by 35% compared to the electric heating deicing consumption, and by 28% compared to the deicing consumption relying on electric pulses alone.
Example 3
The embodiment relates to a low-energy-consumption deicing material with low-interface toughness coating coupled with electric pulses, which is shown in fig. 2; comprising the following steps: the coating 1 with low interface toughness, the base material layer 2 and the electric pulse coil 3 are sequentially arranged from top to bottom;
the low-interface toughness coating 1 is PDMS;
the base material layer 2 is an aluminum alloy material substrate;
the electric pulse coil 3 is positioned below the substrate material layer
The preparation method of the low-energy-consumption deicing of the low-interface toughness coating is shown in fig. 1, and comprises the following steps:
step 1, selecting a 6061 type aluminum block as a base material, cutting an aluminum plate into samples with the thickness of 3mm and the diameter of 80mm, and carrying out sand blasting and anodic oxidation treatment on the surfaces of the samples.
And 2, polishing the surface of the sample by using sand paper to remove oxide skin, removing oil stains by using acetone, treating the sample by using an ultrasonic cleaner for 20min, and finally cleaning the surface by using distilled water and absolute ethyl alcohol and drying at a low temperature.
And 3, mixing the PDMS prepolymer with a curing agent in a ratio of 10:1, stirring and carrying out ultrasonic treatment for 10min, adding edible salt particles into the mixture, stirring and centrifuging at a speed of 500rpm for 10min, and finally spraying on the surface of an aluminum plate and curing at room temperature.
Step 4, immersing the cured PDMS sample in deionized water at 75 ℃ for 3 hours. And (3) dissolving the edible salt particles, replacing the edible salt particles with deionized water twice during the dissolving process, and finally drying the sample in an oven at 60 ℃ to obtain the substrate material coated with the porous PDMS low-interface toughness coating.
And 5, selecting an electric pulse coil with the size of 4mm in inner diameter and 80mm in outer diameter, fixing the electric pulse coil at the bottom of a base material layer coated with a low-interface toughness coating, connecting a power supply to charge a capacitor at the plate spacing of 0mm, discharging the coil after the charging is finished, and vibrating the base material by electromagnetic force impact.
Step 6, according to the vibration and the deicing effect, adjusting the position and the plate spacing of the electric pulse coil by measuring the deicing external force based on the coupling electric pulse and the low-interface toughness coating, so that the deicing effect reaches an optimal state, namely an optimal deicing mode; the external force required for removing the ice layer, namely deicing external force, is measured through a self-made ice adhesion experimental device, the experimental device is shown in fig. 3 (d) and fig. 4, 4 is a test bed, the fixture 9 is used for fixing the aluminum alloy substrate 7 covered with the low-interface toughness coating, the sliding rail 5 moves forwards to drive the dynamometer 6 to push the ice layer 8, and the stress of the broken ice layer is recorded. Under the same experimental conditions, the deicing external force of the surface coating low-interface toughness coating material is 83N, the deicing external force of the vibration deicing of the electric pulse coil is 164N, and the deicing external force of the invention is 52N.
And 7, selecting an optimal deicing mode, adjusting the charge voltage of the capacitor, measuring deicing external force under different voltages, and selecting the voltage at which the minimum deicing external force can be removed by the ice layer. In this embodiment, the charging voltage of the capacitor is adjusted to 300V, the deicing effect is further observed, and the deicing external force is measured. At this time, the energy consumption was reduced by 38% compared to the electrothermal deicing consumption, and by 31% compared to the deicing consumption relying on only the electric pulse.
Example 4
The embodiment relates to a low-energy-consumption deicing material with low-interface toughness coating coupled with electric pulses, which is shown in fig. 2; comprising the following steps: the coating 1 with low interface toughness, the base material layer 2 and the electric pulse coil 3 are sequentially arranged from top to bottom;
the low-interface toughness coating 1 is PDMS;
the base material layer 2 is an aluminum alloy material substrate;
the electric pulse coil 3 is positioned below the substrate material layer
The preparation method of the low-energy-consumption deicing of the low-interface toughness coating is shown in fig. 1, and comprises the following steps:
step 1, selecting a 6061 type aluminum block as a base material, cutting an aluminum plate into samples with the thickness of 3mm and the diameter of 80mm, and carrying out sand blasting and anodic oxidation treatment on the surfaces of the samples.
And 2, polishing the surface of the sample by using sand paper to remove oxide skin, removing oil stains by using acetone, treating the sample by using an ultrasonic cleaner for 20min, and finally cleaning the surface by using distilled water and absolute ethyl alcohol and drying at a low temperature.
And 3, mixing the PDMS prepolymer with a curing agent in a ratio of 10:1, stirring and carrying out ultrasonic treatment for 10min, adding edible salt particles into the mixture, stirring and centrifuging at a speed of 500rpm for 10min, and finally spraying on the surface of an aluminum plate and curing at room temperature.
Step 4, immersing the cured PDMS sample in deionized water at 75 ℃ for 3 hours. And (3) dissolving the edible salt particles, replacing the edible salt particles with deionized water twice during the dissolving process, and finally drying the sample in an oven at 60 ℃ to obtain the substrate material coated with the porous PDMS low-interface toughness coating.
And 5, selecting an electric pulse coil with the size of 4mm in inner diameter and 80mm in outer diameter, fixing the electric pulse coil at the bottom of a base material layer coated with a low-interface toughness coating, connecting a power supply to charge a capacitor at a plate spacing of 2mm, discharging the coil after the charging is finished, and vibrating the base material by electromagnetic force impact.
Step 6, according to the vibration and the deicing effect, adjusting the position and the plate spacing of the electric pulse coil by measuring the deicing external force based on the coupling electric pulse and the low-interface toughness coating, so that the deicing effect reaches an optimal state, namely an optimal deicing mode; the external force required for removing the ice layer, namely deicing external force, is measured through a self-made ice adhesion experimental device, the experimental device is shown in fig. 3 (a) and fig. 4, 4 is a test bed, the fixture 9 is used for fixing the aluminum alloy substrate 7 covered with the low-interface toughness coating, the sliding rail 5 moves forwards to drive the dynamometer 6 to push the ice layer 8, and the stress of the broken ice layer is recorded. Under the same experimental conditions, the deicing external force of the surface coating low-interface toughness coating material is 83N, the deicing external force of the vibration deicing of the electric pulse coil is 164N, and the deicing external force of the invention is 66N.
And 7, selecting an optimal deicing mode, adjusting the charge voltage of the capacitor, measuring deicing external force under different voltages, and selecting the voltage at which the minimum deicing external force can be removed by the ice layer. In this embodiment, the charging voltage of the capacitor is adjusted to 300V, the deicing effect is further observed, and the deicing external force is measured. At this time, the energy consumption is reduced by 30% compared with the electric heating deicing consumption, and by 24% compared with the deicing consumption relying on electric pulses alone.
The low-energy-consumption deicing method of the low-interface toughness coating coupled with the electric pulse combines the characteristics of high electric pulse deicing efficiency and simple structure with the advantages of the low-interface toughness coating on large-area structure deicing, combines the active deicing technology with the passive anti-icing technology, can realize low-energy-consumption, high-efficiency and large-area deicing, effectively reduces deicing external force and is simple to operate; the invention applies the low-interface toughness coating on the deicing surface, can induce the generation and the rapid expansion of microcracks due to the low solid-ice interface fracture toughness, and can prevent the deicing external force from being influenced by the area within a certain range along with the increase of the deicing area, so that the deicing external force can be obviously reduced by means of the low-interface toughness coating when the deicing is applied to large-area deicing, and the substrate plate can vibrate due to the strong electromagnetic force generated between the electric pulse coil and the substrate plate in combination with the electric pulse deicing, thereby greatly reducing the external force for removing the surface ice layer, and having more obvious advantages. The invention utilizes the electric pulse deicing to have lower energy consumption, combines the low-interface toughness coating, can remarkably reduce the energy consumption, has lower energy consumption compared with electrothermal deicing or simple electric pulse deicing, can meet the requirement of low-energy deicing of the surface of an airplane, effectively improves the deicing efficiency, can be suitable for changeable and complex flight environments, and has important significance for the technical development of low-energy efficient large-area surface deicing.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention.

Claims (10)

1. A low energy deicing material having a low interface toughness coating coupled with electrical pulses, comprising: the low interface toughness coating, the base material layer and the electric pulse coil are sequentially formed from top to bottom.
2. The low energy deicing material of claim 1, wherein said low interfacial toughness coating is any one of PTFE, porous PDMS, or PDMA.
3. The low energy deicing material of claim 1, wherein said base material layer is an aluminum alloy material substrate.
4. The low energy deicing material of claim 1, wherein said low interface toughness coating couples electrical pulses with a capacitance of 1500 μf.
5. The low energy deicing material of claim 1, wherein said electrical pulse coil is spaced from the layer of substrate material by a distance of 0mm, 1mm, or 2mm.
6. The low energy deicing material of claim 1, wherein said electrical pulse coil is sized to: an inner diameter of 4mm, an outer diameter of 60mm or an inner diameter of 4mm and an outer diameter of 80mm.
7. A method of preparing a low energy deicing material for low interface toughness coating coupled with electrical pulses, as described in any one of claims 1-6, comprising the steps of:
step 1, pretreatment of a base material: carrying out sand blasting, anodic oxidation and roughening on a substrate material, cleaning and drying for later use;
step 2, mixing the low-interface toughness coating polymer precursor, the binder and the coating auxiliary agent, preparing a base material, and stirring;
step 3, spraying the base material prepared in the step 2 on the surface of the base material pretreated in the step 1, solidifying, and cooling to obtain a base material layer covered with a low-interface toughness coating;
and 4, fixing the electric pulse coil on the bottom of the base material layer covered with the low-interface toughness coating.
8. The method for preparing a low energy deicing material for low interface toughness coating coupled with electrical pulses of claim 7, wherein in step 2, the mass ratio of polymer precursor, binder to coating aid is 6:6:1.
9. The method for preparing a low energy deicing material for low interface toughness coating coupled with electric pulses of claim 7, wherein in step 2, said binder is aluminum dihydrogen phosphate having a purity of 40%.
10. The method for producing a low energy deicing material of claim 7, wherein in step 3, said spraying is performed at a pressure of 0.25MPa, said curing temperature is 350 ℃, and said spraying treatment is performed at a position 10cm from the surface of the base material layer using a spray gun having a nozzle diameter of 2mm.
CN202310314605.7A 2023-03-28 2023-03-28 Low-energy-consumption deicing material with low-interface toughness coating coupled with electric pulse and preparation method thereof Pending CN116351679A (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115260990A (en) * 2022-07-26 2022-11-01 南京航空航天大学 Low energy consumption deicing material relying on low interfacial toughness coating and preparation method thereof

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Publication number Priority date Publication date Assignee Title
CN115260990A (en) * 2022-07-26 2022-11-01 南京航空航天大学 Low energy consumption deicing material relying on low interfacial toughness coating and preparation method thereof

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