A method of a modified silicon -based polymer to prepare the structure function of integrated coating

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

Active Publication Date: 2022-08-05
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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  • A method of a modified silicon -based polymer to prepare the structure function of integrated coating
  • A method of a modified silicon -based polymer to prepare the structure function of integrated coating
  • A method of a modified silicon -based polymer to prepare the structure function of integrated coating

Examples

Experimental program
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Effect test

Embodiment 1

[0030] First, weigh 3.5g of polycarbosilane into a three-necked flask, add magnetron and zeolite, apply a certain amount of vacuum grease to each grinding joint of the schlenk equipment, connect the equipment, and place the Dewar flask in the equipment Under the cold sink, put liquid nitrogen in the Dewar bottle for sealing, then turn on the vacuum pump to vacuum to remove the air in the equipment and the water vapor in the glass wall, until the vacuum degree is in the range of -0.9~-1.0mpa, close the vacuum pump Carry out pressure maintenance to ensure good air tightness of the equipment. At this time, turn on the argon switch again, and adjust the argon flow rate to select an appropriate flow rate according to the gas output of the bubbler to ensure stable airflow. At this time, slowly open the valve on the double-row pipe to the vacuum side until the vacuum degree in the three-neck bottle is consistent and stable with the vacuum degree at other positions of the equipment, a...

Embodiment 2

[0035] First, weigh 4 mol of hafnium chloride and 1 mol of tantalum chloride into a three-necked flask, add magnetron and zeolite, apply a certain amount of vacuum grease to the ground joints of the schlenk equipment, and connect the equipment. Put it under the cold sink in the equipment, and put liquid nitrogen into the Dewar flask for sealing, and then turn on the vacuum pump to vacuum 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 keep the pressure in the range to ensure good air tightness of the equipment. At this time, turn on the argon switch again, and adjust the argon flow rate to select an appropriate flow rate according to the gas output of the bubbler to ensure stable airflow. At this time, slowly open the valve on the double-row pipe to the vacuum side until the vacuum degree in the three-neck bottle is consistent and stable with the vacuum degree at other positions of the...

Embodiment 3

[0040] First, weigh 0.4mol zirconium acetylacetonate, 0.1mol titanium acetylacetonate, and 0.3mol polycarbosilane, dissolve them in xylene, pour them into a three-necked flask, add magnetron and zeolite, and smear the ground joints of the schlenk equipment. A certain amount of vacuum grease and the equipment are connected, the Dewar flask is placed under the cold sink in the equipment, and the Dewar flask is filled with liquid nitrogen for sealing, and then the vacuum pump is turned on 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 good air tightness of the equipment. At this time, turn on the argon switch again, and adjust the argon flow rate to select an appropriate flow rate according to the gas output of the bubbler to ensure stable airflow. At this time, slowly open the valve on the double-row pipe to the vacuum side until the vacuum degree in the three-...

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Abstract

The invention relates to a method for preparing a structural-function integrated coating from a modified silicon-based polymer. The schlenk technology is used to prepare a metal-organic salt modified silicon-based polymer with high melting point, high electrical conductivity and high strength. Cross-linking, curing and cracking are carried out, and then heat treatment is carried out at a suitable temperature to obtain amorphous ceramic powder with a certain nanostructure. The second step is to process the obtained powder by using atmospheric plasma spraying or suspended plasma spraying to quickly prepare coating materials. The principle is that metal organic salts react with silicon-based polymers to synthesize single-source precursors, and then the coating is prepared by thermal spraying technology. Because the silicon-based polymer can form an ultra-high melting point amorphous ceramic phase after grafting to improve its ablation resistance, and at the same time, the polymer-converted ceramic forms a nano-network in which the conductive phase is embedded in the amorphous matrix to improve its wave-absorbing properties, so that the prepared The coating has both structure and performance integration.

Description

technical field [0001] The invention belongs to the application of a composite material, anti-ablation material, wave absorbing material and the like to prepare a structure-function integrated coating by combining a polymer-converted ceramic and a coating preparation technology, and relates to a modified silicon-based polymer for preparing a structure and function The integrated coating method is a preparation method of a high-strength, low-corrosion, wave-absorbing structure-function integrated material with strong design and wide applicability. Background technique [0002] With the continuous improvement of the national development strategy demand and the rapid development of national defense technology, the service environment of materials used in the fields of rail transit, wireless communication, aerospace vehicles and metallurgy is becoming more and more severe. Among them, the performance assessment is more stringent. As a potential integrated material of ablation r...

Claims

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Application Information

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Patent Type & Authority Patents(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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