Atomic oxygen protective coating with physical damage spontaneous repairing function and preparation method thereof

A protective coating, atomic oxygen technology, applied in the coating and other directions, can solve the problems of mechanical property degradation and function loss of protective materials, and achieve the effect of good protective effect, strong anti-peeling ability and high transparency

Active Publication Date: 2018-07-27
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to utilize the characteristics of supramolecular polymers that can repair physical damage to prepare an atomic oxygen protective coating with the function of spontaneously repairing physical damage, so as to solve the problem in the background technology that the atomic oxygen protective coating is damaged during use. , leading to the degradation of mechanical properties and loss of function of the protected material

Method used

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  • Atomic oxygen protective coating with physical damage spontaneous repairing function and preparation method thereof
  • Atomic oxygen protective coating with physical damage spontaneous repairing function and preparation method thereof
  • Atomic oxygen protective coating with physical damage spontaneous repairing function and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] Embodiment 1: the polyimide film (hereinafter referred to as Kapton HN film) that DuPont produces is the brand that is the polyimide film (hereinafter referred to as Kapton HN film) surface and prepares the supramolecular polymer protective coating with ureido-derived silica nanoparticles as building blocks layer.

[0026] 1) Preparation of supramolecular polymers. Such as figure 1 The given reaction route, ultrasonic dispersion of silica nanoparticles (2g) with a particle size of 20nm in 500mL of absolute ethanol, slowly added 3-aminopropyltriethoxysilane (1g, 4.5mmol) under vigorous stirring , reacted at 50°C for 24h, centrifuged and washed three times with absolute ethanol and collected to obtain amino-derivatized silica nanoparticles (2.38g).

[0027]The obtained amino-derivatized silica nanoparticles (1 g) were ultrasonically dispersed in 1 L of dry acetone, and methyl isocyanate (0.26 g, 3.6 mmol) was added under stirring, and reacted at 50 °C for 6 h, with The...

Embodiment 2

[0031] Embodiment 2: on the surface of the polyimide film of Kapton HN produced by DuPont, the supramolecular polymer protective coating with amino and carboxyl derivatized polysilsesquioxane as the building block is prepared respectively

[0032] 1) Preparation of supramolecular polymers. Dissolve vinyl polysilsesquioxane (1g, 1.6mmol) in 50mL tetrahydrofuran, add β-mercaptoethylamine (0.98g, 12.8mmol) and stir at room temperature for 10min under the irradiation of a 10w ultraviolet lamp, distill off the solvent to obtain Amino derivatized polysilsesquioxane (1.98 g, 1.6 mmol). The prepared amino-derived polysilsesquioxane was dissolved in dilute hydrochloric acid with a pH value of 5, so that the amino groups on the surface were ionized and positively charged, and the concentration was 5 wt%.

[0033] The obtained amino-derived polysilsesquioxane (0.99g, 0.8mmol) was dissolved in dry tetrahydrofuran, and maleic anhydride (0.63g, 7.7mmol) was added under stirring, and reacte...

Embodiment 3

[0037] Embodiment 3: On the surface of the poly-p-phenylene terephthalamide fiber of Kevlar brand produced by DuPont, alternately deposit supramolecular polymer protection with polysilsesquioxane derived from amino and carboxyl groups as building blocks. coating.

[0038] 1) Preparation of building blocks. Octavinyl polysilsesquioxane (1g, 1.6mmol) was dissolved in 50mL of tetrahydrofuran, and β-mercaptoethylamine (0.98g, 12.8mmol) was added, stirred at room temperature under a 10w ultraviolet lamp for 10min, and the solvent was distilled off to obtain amino Derivatized polysilsesquioxane (1.98 g, 1.6 mmol). The prepared amino-derived polysilsesquioxane was dissolved in dilute hydrochloric acid with a pH value of 5, so that the amino groups on the surface were ionized and positively charged, with a concentration of 2 wt%.

[0039] The obtained amino-derived polysilsesquioxane (0.99g, 0.8mmol) was dissolved in dry tetrahydrofuran, and maleic anhydride (0.63g, 7.7mmol) was add...

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Abstract

The invention discloses an atomic oxygen protective coating with a physical damage spontaneous repairing function and a preparation method thereof, belonging to the field of spontaneous repairing technology of coatings. The preparation method comprises the steps of firstly, chemically modifying component materials of a traditional atomic oxygen protective coating, deriving chemical groups capableof producing supra-molecular interaction, thereby forming a supra-molecular polymer, with both atomic oxygen protective capability and spontaneous repairing capability, through self-assembling; and then, washing and processing substrate material, and preparing a supra-molecular polymer on the substrate, thereby finishing the preparation of a protective coating described in the invention. The coating provided by the invention has the advantages of good transparency, good atomic oxygen protective effect, strong anti-stripping capability and the like. The coating, after passing through a ground-based simulated atomic oxygen exposure test that approximately runs in a low-earth orbit for half a year, can still maintain good transparency and repairing capability. The atomic oxygen protective coating provided by the invention is simple in process, easily available for materials and low in cost. Therefore, the atomic oxygen protective coating provided by the invention is expected to apply to structural components such as heat insulation materials of spacecrafts, optical elements and flexible substrates of solar panels.

Description

technical field [0001] The invention belongs to the technical field of self-repairing coatings, and in particular relates to an atomic oxygen protective coating capable of spontaneously repairing physical damage and a preparation method thereof. Background technique [0002] Artificial earth satellites, space stations and other aircraft will be affected by harsh space environments during their service in low-Earth orbit, such as: high-energy atomic oxygen erosion, strong ultraviolet radiation, and frequent thermal cycles with temperatures ranging from -100°C to 100°C Wait. Among them, high-energy atomic oxygen will undergo a violent oxidation reaction with the polymer material on the surface of the aircraft, causing severe chemical erosion of the material, resulting in a significant reduction in the mechanical strength of the material and a decline in insulation and other functions, which will seriously affect the flight of the aircraft. Safety (Macromolecules 2002, 35, 496...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08G83/00C09D187/00
CPCC08G83/008C08J7/0427C08J2379/08C08J2487/00
Inventor 孙俊奇王晓晗
Owner JILIN UNIV
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