Fire disaster low-altitude flight rescue unmanned aerial vehicle fuselage light material surface coating and preparation method thereof

Abstract

The invention discloses a fire disaster low-altitude flight rescue unmanned aerial vehicle fuselage light material surface coating and a preparation method thereof. The coating comprises a bonding layer, an anti-oxidation layer, an oxygen propagation prevention layer and a reflective thermal insulation layer. The preparation method comprises the following steps: selecting a material with a thermal expansion coefficient similar to that of a light material, and preparing a bonding layer on the surface of the light material; heating and oxidizing the bonding layer, so that a compact oxidation film is generated on the surface of the bonding layer to form an anti-oxidation layer; preparing an oxygen propagation prevention layer on the surface of the anti-oxidation layer by using a ceramic material; and preparing a reflective thermal insulation layer on the surface of the oxygen propagation prevention layer by using the ceramic material. According to the invention, the coating has a matched thermal expansion coefficient with a light fuselage material of the unmanned aerial vehicle, and the unmanned aerial vehicle fuselage has oxidation resistance by combining extremely low thermal conductivity, high reflectivity and extremely strong oxygen transmission resistance of each layer of material in the coating, so that the working temperature of the unmanned aerial vehicle is increased, and it is ensured that the unmanned aerial vehicle can be used in fire disaster rescue and can be used for a long time.

Description

technical field [0001] The invention relates to the technical field of composite materials and coating preparation, in particular to a surface coating of light material for a fuselage of a fire low-altitude flight rescue drone and a preparation method thereof. Background technique [0002] With the continuous deepening and promotion of the research and application of rescue UAVs, its maximum take-off weight has reached more than ten tons. UAVs are used at fire rescue sites for fire fighting, personnel rescue, communication connections and material delivery, etc. The mission can effectively reduce the danger of traditional pilots when performing missions; at the same time, when rescue drones perform fire rescue in cities, they have the advantages of small size, easy operation, and small restrictions on take-off sites, which are more suitable for the development trend of modern technology and applications . In order to effectively reduce the weight of the aircraft itself and ...

AI Technical Summary

Problems solved by technology

In order to effectively reduce the weight of the aircraft itself and increase the amount of material it can carry, different types of resin-based composite materials are commonly used to make the fuselage of low-altitude aircraft; however, resin-based composite materials have low melting point and high temperature resistance. Insufficient, easy to be corroded by smoke at the fire scene and lead to failure, which limits its application in large-scale fires and high-temperature fires

[0003]Due to the problems of low melting point, insufficient high temperature resistance and poor corrosion resistance of resin-based composite materials, they cannot be used in high temperature environments, and other lightweight materials are used instead Resin matrix composites are currently one of the most effective ways

Lightweight materials such as carbon fiber braids, titanium alloys, and aluminum alloys have the advantages of high melting point, low specific density, strong toughness, and corrosion resistance, and can replace resin-based composite materials to make the fuselage of low-altitude flying rescue drones; however, in In the temperature range above 700°C, the above lightweight materials will react with oxygen in the air and cause failure

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