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Method for preparing high inorganic component silicone-SiO2 hybrid coating by sol-gel method

An inorganic component and silicone technology, applied in coatings, silicon oxide, silicon dioxide, etc., can solve the problem of long-lasting resistance to atomic oxygen erosion of organic coating materials, poor bonding performance of metal materials, and resistance to vacuum ultraviolet radiation Unsatisfactory problems, such as excellent resistance to vacuum ultraviolet radiation, good resistance to atomic oxygen erosion, and good resistance to vacuum ultraviolet radiation

Inactive Publication Date: 2019-03-05
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The object of the present invention is to provide a kind of sol-gel method to prepare the organosilicon-SiO of high inorganic component 2 The method of hybrid coating solves the problem of poor bonding performance between inorganic coating materials and organic polymer materials, organic polymer-based composite materials, carbon materials and metal materials, organic coating materials are durable in resisting atomic oxygen erosion, and are resistant to vacuum ultraviolet radiation Problems with unsatisfactory properties to promote the application of organic polymers, organic polymer-based composites and carbon materials in aerospace materials, and extend the service life of metal materials in space

Method used

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  • Method for preparing high inorganic component silicone-SiO2 hybrid coating by sol-gel method
  • Method for preparing high inorganic component silicone-SiO2 hybrid coating by sol-gel method
  • Method for preparing high inorganic component silicone-SiO2 hybrid coating by sol-gel method

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Embodiment

[0047] (1) Preparation of sol

[0048] Such as Picture 9 As shown, the sol-gel method is used to prepare nano-SiO 2 60wt.% organosilicon-SiO 2 Sol method:

[0049] In the first step, tetraethylorthosilicate (TEOS) is used as the precursor to prepare nano-SiO 2 Sol: Add 5ml TEOS to 38ml of absolute ethanol (EtOH), and use magnetic stirring to quickly stir until uniform; then add 12ml of HNO with a concentration of 65wt% 3 The solution is used as a catalyst and the pH is adjusted to 2. At this time, a large amount of reaction heat is released. Then the solution was stirred vigorously at room temperature for 1 hour and then stood for 24 hours to form SiO 2 Sol is ready for use.

[0050] The second step: 0.9g of silicone resin (polysiloxane) (the amount of silicone resin selected is to hydrolyze all TEOS into SiO 2 Under the assumption of SiO 2 It is calculated by 60wt.% of the total composition) dissolved in 13ml of xylene and stirred vigorously until uniform with a magnetic stirring m...

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Abstract

The invention mainly relates to the field of preparation of protective coatings resistance to atomic oxygen erosion and resistance to vacuum ultraviolet radiation, and particularly relates to a methodfor preparing a high inorganic component silicone-SiO2 hybrid coating resistance to space atomic oxygen erosion and resistance to vacuum ultraviolet radiation by a sol-gel method. The sol-gel methodis adopted, silicon tetraacetate is used as a precursor of a SiO2 inorganic component, and organosilicon is used as an organic component; a high inorganic component hybrid coating is prepared on the surface of a space material by adjusting and controlling critical process parameters; and under the premise of ensuring the flexibility and transparency of the material, the coating can effectively protect the space material from erosion and destruction by high energy atomic oxygen and vacuum ultraviolet in a low-earth orbit space environment. The method achieves hybridization of organic and inorganic components at a molecular level, when the silicone-SiO2 hybrid coating is applied as the protective coating on the space material, the erosion performance resistance to atomic oxygen and resistance to vacuum ultraviolet of a matrix material can be significantly improved, and the service life of the space material is prolonged.

Description

Technical field [0001] The invention mainly relates to the field of preparation of anti-protonic oxygen erosion and vacuum ultraviolet radiation resistant protective coatings, in particular to a sol-gel method for preparing high-inorganic silicone resistant to space atomic oxygen erosion and vacuum ultraviolet radiation resistance -SiO 2 The hybrid coating method uses a sol-gel method to prepare a uniform and stable coating system with a high content of inorganic components. Background technique [0002] Organic polymer materials and reinforced organic polymer matrix composite materials (such as: Kevlar fiber, polyimide (PI), polytetrafluoroethylene (PTFE) and carbon fiber reinforced epoxy resin matrix composite materials, etc.) and carbon materials ( Such as: graphite, carbon fiber reinforced carbon composite materials, etc.). Compared with traditional materials, it has the advantages of low density, high specific strength, high specific modulus, low thermal expansion coefficien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/65C08J7/04C01B33/14B05D7/24B05D3/02
CPCB05D3/0254B05D7/24C01B33/14C08J7/0427C08J2363/00C08J2483/04C09D1/00
Inventor 李美栓齐红钱余海徐敬军左君
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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