A kind of preparation method of superhydrophobic low infrared emissivity coating

A low-infrared emission, super-hydrophobic technology, used in coatings, polyurea/polyurethane coatings, etc., can solve the problems of lack of super-hydrophobicity and self-cleaning properties, and achieve good infrared stealth effect, excellent adhesion and low gloss performance. , the effect of simple preparation process

Active Publication Date: 2022-04-26
CHUZHOU UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a method for preparing a superhydrophobic low-infrared emissivity coating, which solves the technical problem that the existing low-infrared emissivity coating does not have superhydrophobic and self-cleaning properties

Method used

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  • A kind of preparation method of superhydrophobic low infrared emissivity coating
  • A kind of preparation method of superhydrophobic low infrared emissivity coating

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preparation example Construction

[0024] see Figure 1-2 , the embodiment of the present invention provides a technical solution: a method for preparing a superhydrophobic low infrared emissivity coating, the specific operation steps are as follows:

[0025] S1, use standard tin plate, aluminum alloy plate and titanium alloy plate as the substrate, polish the substrate with sandpaper to make the substrate have a roughness of 3-10 μm, rinse it with tap water and dry it in an oven at 80°C for 30 minutes, then use a piece of alcohol dipped in alcohol Wipe the substrate clean with a cotton cloth for later use;

[0026] S2, HCSO and PU are fully mixed according to the mass ratio of 1:9 to 3:7 to obtain blended modified PU, and then HCSO modified PU is used as a binder to prepare a coating, and polyether polyol is used as a curing agent. agent, the dosage is 25% of the quality of the above-mentioned modified resin;

[0027] S3, flaky Al powder and nano-SiO 2 The mass ratio is 5.5:4.5~6.5:3.5, and an appropriate a...

Embodiment 1

[0035] Mix HCSO and PU at a mass ratio of 1:9 to obtain blended modified PU, then use HCSO modified PU as a binder to prepare a coating, and use polyether polyol as a curing agent, the amount of which is the above modification 25% of the mass of permanent resin;

[0036] Flaky Al powder and nano-SiO 2 The mass ratio is 6.5:3.5, and an appropriate amount of HCSO modified PU and functional filler (flaky Al powder + nano-SiO 2 );

[0037] In the plastic cup, add absolute ethanol as a diluent, the weight of which is 20% of the mass of HCSO modified PU, and use a glass rod to fully stir to make it evenly dispersed until no obvious particles can be seen in the coating;

[0038] Use ultrasonic waves with a frequency of 25KHz to disperse the paint further ultrasonically for 10 minutes to further disperse the paint evenly, and then add a small amount of absolute ethanol to adjust the viscosity of the paint to an appropriate range until it can flow continuously downward in a straight li...

Embodiment 2

[0042] Mix HCSO and PU at a mass ratio of 2:8 to obtain blended modified PU, then use HCSO modified PU as a binder to prepare a coating, and use polyether polyol as a curing agent, the amount of which is the above modified 25% of the mass of permanent resin;

[0043] Flaky Al powder and nano-SiO 2 The mass ratio is 5.5:4.5, and an appropriate amount of HCSO modified PU and functional filler (flaky Al powder + nano-SiO 2 );

[0044] In the plastic cup, add absolute ethanol as a diluent, the weight of which is 15% of the mass of HCSO modified PU, and use a glass rod to fully stir to make it evenly dispersed until no obvious particles can be seen in the coating;

[0045] Use ultrasonic waves with a frequency of 25KHz to disperse the paint further ultrasonically for 10 minutes to further disperse the paint evenly, and then add a small amount of absolute ethanol to adjust the viscosity of the paint to an appropriate range until it can flow continuously downward in a straight line...

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Abstract

The invention discloses a method for preparing a super-hydrophobic low-infrared emissivity coating, using flake Al powder as a functional pigment, nano-SiO 2 It is a micro-nano structure modifier, hydrogen-containing silicone oil (HCSO) modified polyurethane (PU) is used as a binder, polyether polyol is used as a curing agent, and absolute ethanol is used as a diluent. The glass rod is fully stirred, and then the ultrasonic wave is used to fully disperse and adjust the viscosity with an appropriate amount of diluent until the coating can flow down in a straight line to obtain a super-hydrophobic low-infrared emissivity coating. Then, 0.8 to 1.2 g of the above-mentioned The paint was coated on the prepared substrate, dried at room temperature for 5 hours, and then placed in an oven at 80°C for 10 hours to obtain a superhydrophobic low infrared emissivity coating. According to the preparation method of the super-hydrophobic low-infrared emissivity coating, the prepared coating has low infrared emissivity, gloss and adhesion performance, and has outstanding super-hydrophobic and self-cleaning properties while having an infrared stealth effect.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a preparation method of a superhydrophobic low infrared emissivity coating. Background technique [0002] All kinds of fighters, missiles and other aircraft are easily detected and destroyed by high-sensitivity infrared detection equipment and infrared guided weapons due to thermal and aerodynamic heating in the 8-14 μm infrared atmospheric window band, which is much higher than the background infrared radiation intensity, which seriously threatens security of military targets. Therefore, infrared stealth technology, which reduces and weakens the effectiveness of enemy infrared detection equipment, is an important means to improve the survivability of aircraft in wartime, and has attracted widespread attention from scholars at home and abroad. [0003] The use of low infrared emissivity materials is currently recognized as the most effective technical method to achieve in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/61
CPCC09D175/04C09D7/61C09D7/70C09D7/69C08K2201/011C08K2003/0812C08K7/26C08K3/08
Inventor 张伟钢吕丹丹
Owner CHUZHOU UNIV
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