Method for preparing structure and function integrated coating by using modified silicon-based polymer

A technology of silicon-based polymers and polymers is applied to the preparation method of structural-functional integration materials. . , a modified silicon-based polymer in the field of integrated structure and function, which can solve the problems that it is difficult to greatly improve the ablation resistance and microwave absorption performance, and achieve the effects of strong designability, high efficiency, and high quality reliability

Active Publication Date: 2021-04-30
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for a single silicon-based polymer (such as polycarbosilane, polynitrosilane, etc.) to greatly improve its anti-ablation performance and microwave absorption performance only through heat treatment, and adding a small amount of modifying components can make its performance Improved

Method used

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  • Method for preparing structure and function integrated coating by using modified silicon-based polymer
  • Method for preparing structure and function integrated coating by using modified silicon-based polymer
  • Method for preparing structure and function integrated coating by using modified silicon-based polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] First, weigh 3.5g of polycarbosilane into a three-neck bottle, add magnets and zeolite, apply a certain amount of vacuum grease to each ground joint of the schlenk equipment and connect the equipment, and place the Dewar bottle in the equipment Underneath the cold depression, fill the Dewar bottle with liquid nitrogen for sealing, then turn on the vacuum pump to remove the air in the equipment and the water vapor in the glass wall, and turn off the vacuum pump when the vacuum degree is in the range of -0.9~-1.0mpa Carry out pressure maintenance to ensure that the airtightness of the equipment is good. At this time, turn on the argon gas switch and adjust the argon gas flow rate to select an appropriate flow rate according to the gas output of the bubbler to ensure a stable gas flow. At this time, slowly open the valve on the double-row tube until the vacuum degree in the three-necked bottle is consistent and stable with that of other parts of the equipment, and then slo...

Embodiment 2

[0035] First, weigh 4 mol of hafnium chloride and 1 mol of tantalum chloride in a three-neck bottle, add magnets and zeolite, apply a certain amount of vacuum grease to each ground joint of the schlenk equipment and connect the equipment, and put the Dewar bottle Place it under the cold trap in the equipment, fill the Dewar bottle with liquid nitrogen for sealing, and then turn on the vacuum pump to remove the air in the equipment and the water vapor in the glass wall until the vacuum degree is -0.9~-1.0mpa Turn off the vacuum pump to maintain the pressure during the range to ensure that the airtightness of the equipment is good. At this time, turn on the argon gas switch and adjust the argon gas flow rate to select an appropriate flow rate according to the gas output of the bubbler to ensure a stable gas flow. At this time, slowly open the valve on the double-row tube until the vacuum degree in the three-necked bottle is consistent and stable with that of other parts of the e...

Embodiment 3

[0040] First, weigh 0.4mol zirconium acetylacetonate, 0.1mol titanium acetylacetonate and 0.3mol polycarbosilane, dissolve them in xylene and pour them into a three-neck bottle, add magnets and zeolite, and coat the ground joints of the schlenk equipment Apply a certain amount of vacuum grease and connect the equipment, place the Dewar bottle under the cold trap in the equipment, fill the Dewar bottle with liquid nitrogen for sealing, and then turn on the vacuum pump to remove the air and glass wall in the equipment When the vacuum degree is in the range of -0.9~-1.0mpa, turn off the vacuum pump to maintain the pressure to ensure that the airtightness of the equipment is good. At this time, turn on the argon gas switch and adjust the argon gas flow rate to select an appropriate flow rate according to the gas output of the bubbler to ensure a stable gas flow. At this time, slowly open the valve on the double-row tube until the vacuum degree in the three-necked bottle is consist...

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Abstract

The invention relates to a method for preparing a structure and function integrated coating by using a modified silicon-based polymer. The method comprises the following steps: preparing a high-melting-point, high-conductivity and high-strength metal organic salt modified silicon-based polymer by using a schlenk technology, and carrying out crosslinking curing and cracking at a certain temperature, then carrying out heat treatment at a proper temperature to obtain the amorphous ceramic powder with a certain nano structure; and 2, treating the obtained powder, and quickly preparing the coating material by adopting atmospheric plasma spraying or suspended plasma spraying. According to the principle, metal organic salt and the silicon-based polymer react to synthesize the single-source precursor, and then preparation of the coating is achieved through the thermal spraying technology. After the silicon-based polymer is grafted, an ultrahigh-melting-point amorphous ceramic phase can be formed, so that the ablation resistance of the silicon-based polymer is improved, meanwhile, the polymer conversion ceramic forms a conductive phase to be embedded into a nano network of an amorphous matrix, so that the wave absorption performance of the silicon-based polymer microwave absorbing coating is improved, and the prepared coating integrates the structure and the performance.

Description

technical field [0001] The invention belongs to the application of polymer conversion ceramics and coating preparation technology to prepare structural and functional integrated coatings in the fields of composite materials, ablation-resistant materials, and wave-absorbing materials, and relates to a modified silicon-based polymer for preparing structural and functional coatings. The integrated coating method is a method for preparing a high-strength, low-corrosion, and wave-absorbing structure-function integrated material with strong designability and wide applicability. Background technique [0002] With the continuous improvement of national development strategy requirements and the rapid development of national defense technology, the service environment of materials used in rail transportation, wireless communications, aerospace vehicles and metallurgy and other fields is becoming more and more severe. Among them, the performance assessment is more stringent. As a pote...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/524C04B35/56C04B41/87
CPCC04B35/524C04B35/5615C04B41/009C04B41/5059C04B41/5057C04B41/87C04B35/83C04B35/565C04B41/4869C04B41/4523
Inventor 付前刚张育育孙佳郭凌翔闫宁宁
Owner NORTHWESTERN POLYTECHNICAL UNIV
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