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Three-dimensional heat-conducting anti-icing and deicing electric heating coating based on in-situ growth and preparation method thereof

An in-situ growth, three-dimensional technology, applied in the field of flight safety, can solve the problems of poor practicability of hydrophobic or ice-repellent coating, low efficiency of electric heating or bleed air deicing, high energy consumption, etc., and achieve good heat transfer capacity and hydrophobic angle. , Excellent electrothermal anti-icing effect

Active Publication Date: 2022-07-29
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the fact that the deicing method generally adopts electric heating or bleed air heating on the existing aircraft, which consumes a lot of energy, cannot form an effective three-dimensional heat conduction network, epoxy resin is easy to cause ice accumulation, the practicability of hydrophobic or ice-repellent coatings is poor, and In order to solve the problem of low efficiency of traditional electric heating or bleed air deicing, a three-dimensional thermal conductive anti-icing electrothermal coating and its preparation method based on in-situ growth are proposed. By peeling off boron nitride and growing silicon dioxide on its edge, interconnection can be obtained. The three-dimensional thermally conductive filler can obtain an electrothermal coating with good anti-icing effect, which has a good application prospect on the leading edge of the aircraft wing

Method used

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  • Three-dimensional heat-conducting anti-icing and deicing electric heating coating based on in-situ growth and preparation method thereof
  • Three-dimensional heat-conducting anti-icing and deicing electric heating coating based on in-situ growth and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] like figure 1 As shown, this example prepares the B10S1 composite coating as follows:

[0016] Step 1: Mix 2g of boron nitride and 200g of triethanolamine, and stir at high speed for 8 hours.

[0017] Step 2. The obtained product was centrifuged, and 150 g of the supernatant was taken.

[0018] Step 3: Add 150 g of deionized water to the above supernatant, add 15 g of tetraethyl orthosilicate dropwise, and stir for 1 hour.

[0019] Step 4: After washing and filtering the reacted mixed solution with acetone and deionized water for five times, the filtered product is dispersed in 100 g of deionized water to obtain a dispersion of composite nanoparticles.

[0020] Step 5. After lyophilizing the dispersion for 72 hours, the dried composite nanoparticles are obtained, that is, figure 2 Medium B10S1.

[0021] Step 6: Mix 1g of B10S1 composite nanoparticles with 20g of PTFE coating, and stir for half an hour.

[0022] Step 7. Spray the mixed solution on the surface of th...

Embodiment 2

[0025] This example configures the B1S1 composite coating as follows:

[0026] Step 1: Mix 2g of boron nitride and 200g of triethanolamine, and stir at high speed for 8 hours.

[0027] Step 2. The obtained product was centrifuged, and 150 g of the supernatant was taken.

[0028] Step 3: Add 150 g of deionized water to the above supernatant, add 150 g of tetraethyl orthosilicate dropwise, and stir for 1 hour.

[0029] Step 4: After the reaction mixture is filtered and washed five times with acetone and deionized water, the filtered product is dispersed in 100 g of deionized water to obtain a dispersion of composite nanoparticles.

[0030] Step 5. After lyophilizing the dispersion for 72 hours, the dried composite nanoparticles are obtained, that is, figure 2 Middle B1S1.

[0031] Step 6: Mix 1g of B1S1 composite nanoparticles with 20g of liquid polytetrafluoroethylene paint, and stir for half an hour.

[0032] Step 7. Spray the mixed solution on the surface of the aluminum...

Embodiment 3

[0035] This example configures the PTFE coating as follows:

[0036] Step 1. Weigh 20g of PTFE coating.

[0037] Step 2: Spray the paint on the surface of the aluminum plate. A gravity spray gun with a diameter of 1.5mm is selected, the spraying distance is controlled at 20cm, the compressed air pressure is controlled at 0.35MPa, the air flow is controlled at 200L / min, the paint flow is controlled at 180mL / min, and the spray width is controlled at 20cm. Allow to dry for 24 hours after spraying.

[0038] This example is based on the polytetrafluoroethylene coating prepared by the above method. An electric heating device was used to characterize the anti-icing effect of the coating, and a 3 cm thick ice layer was first frozen on the coating surface for 12 hours. When the electric heating device is turned on, when the voltage reaches 12V, the rated power is 2w, and it is heated to 20 minutes in the environment of -20 °C, due to the low heat transfer efficiency, the heat is dis...

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Abstract

The invention relates to a three-dimensional heat-conducting anti-icing and deicing electrothermal coating based on in-situ growth and a preparation method thereof, triethanolamine is used as a stripping auxiliary agent, boron nitride is stripped into a boron nitride nanosheet, the boron nitride nanosheet is used as a template agent, tetraethyl orthosilicate is used as a silicon source, and silicon dioxide is grown in situ at the edge of the boron nitride nanosheet to obtain a composite nanofiller; the composite nanofiller is filled in a polytetrafluoroethylene coating, so that silicon dioxide is communicated with the boron nitride nanosheets to form a three-dimensional heat-conducting network, and then the three-dimensional heat-conducting network is sprayed and formed on the surface of an aluminum plate, so that the anti-icing and deicing electric heating coating can be obtained. Boron nitride is stripped, silicon dioxide grows on the edge of the boron nitride, three-dimensional heat conduction filler which is communicated with one another is obtained, the electric heating coating with a good anti-icing and deicing effect is obtained, and the electric heating coating has a good application prospect on the front edge of an aircraft wing.

Description

technical field [0001] The invention relates to a technology in the field of flight safety, in particular to an in-situ growth-based three-dimensional heat-conducting anti-icing electrothermal coating and a preparation method thereof. Background technique [0002] Airplanes will freeze when they meet high-altitude droplets during flight, which will increase the probability of flight accidents and have catastrophic consequences. In the prior art, the hydrophobicity or ice repellency of coatings is improved by introducing fluorine- or silicon-containing hydrophobic functional groups, and these studies have achieved remarkable results in the field of static anti-icing. However, at present these anti-icing studies often do not have practical value for aviation, because the improvement of coating hydrophobicity or ice repellency can only reduce the interaction between the ice layer and the wing, but cannot solve the growth of the ice layer itself and stacking problems. Flight e...

Claims

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Application Information

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IPC IPC(8): C09D127/18C09D7/61
CPCC09D127/18C09D7/61C09D7/70C08K2003/385C08K2201/011C08K7/00C08K3/38C08K3/36Y02P20/10
Inventor 刘洪黄小彬吉泽民盛浩强
Owner SHANGHAI JIAO TONG UNIV
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