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Fine denier boron oxide fiber impregnating agent and preparation method thereof

A technology of boron oxide and sizing agent, which is applied in the field of sizing agent for fine denier boron oxide fibers and its preparation, can solve the problems of affecting the comprehensive performance of fibers, fiber performance attenuation, and easy occurrence of hairs, etc. The preparation method is simple and easy, Improved antistatic properties and reduced wire breakage

Active Publication Date: 2016-12-14
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, my country's BN fiber industry has made considerable progress under the strong support of the country, but the performance of the prepared BN fiber still cannot meet the growing needs of aerospace and military industries, which makes the development of high-performance BN fiber become an urgent task
In the process of fiber preparation, the precursor of BN fiber is boron oxide fiber, which is very easy to absorb moisture and attenuate the fiber performance; at the same time, high-performance fibers require fine denier fibers, and fibers with small deniers have poor antistatic properties. It is also prone to fuzz, which seriously affects the overall performance of the fiber, and studying a suitable sizing agent can solve the above problems. Therefore, the preparation of a sizing agent suitable for fine denier boron oxide fibers is very important

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Pour 900mL of n-dodecane, 100mL of tetraethyl orthosilicate, and 7.5g of WDCO-804X antistatic agent into a beaker, and stir with a magnetic stirrer until the three are evenly mixed to obtain the fine-denier boron oxide fiber of the present invention. agent.

[0017] In the air environment, the mechanical properties of boron oxide fibers treated with and without sizing were compared. The test results are as follows:

[0018] The average strength of boron oxide fiber treated with sizing agent was 1492MPa after 1 hour in the air, 1465MPa after 6 hours, 1448MPa after 12 hours, and 1387MPa after 24 hours.

[0019] The average strength of the boron oxide fiber without sizing treatment is 961MPa after being placed in the air for 1 hour, and the fiber is pulverized after 6 hours and has no strength. It shows that the sizing agent protects the fiber from moisture.

Embodiment 2

[0021] Pour 900mL of n-dodecane, 100mL of tetraethyl orthosilicate, and 10g of DY-ET901 organic silicon antistatic agent into a beaker, and stir with a magnetic stirrer until the three are evenly mixed to obtain the fine-denier boron oxide fiber of the present invention. Wetting agent.

[0022] In the air environment, the mechanical properties of boron oxide fibers treated with and without sizing were compared. The test results are as follows:

[0023] The average strength of boron oxide fiber treated with sizing agent was 1488MPa after 1 hour in the air, 1459MPa after 6 hours, 1444MPa after 12 hours, and 1384MPa after 24 hours.

[0024] The average strength of the boron oxide fiber without sizing treatment was 958MPa after being placed in the air for 1 hour, and the fiber was pulverized after 6 hours and had no strength. It shows that the sizing agent protects the fiber from moisture.

Embodiment 3

[0026] Pour 900mL of n-dodecane, 100mL of tetraethyl orthosilicate, and 20g of ZJ-1500 organic silicon antistatic agent into a beaker, and stir with a magnetic stirrer until the three are evenly mixed to obtain the fine-denier boron oxide fiber of the present invention. Wetting agent.

[0027] In the air environment, the mechanical properties of boron oxide fibers treated with and without sizing were compared. The test results are as follows:

[0028] The average strength of boron oxide fiber treated with sizing agent was 1495MPa after 1 hour in the air, 1464MPa after 6 hours, 1450MPa after 12 hours, and 1390MPa after 24 hours.

[0029] The average strength of the boron oxide fiber without sizing treatment is 966MPa after being placed in the air for 1 hour, and the fiber is pulverized after 6 hours and has no strength. It shows that the sizing agent protects the fiber from moisture.

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Abstract

The invention belongs to the technical field of special ceramics, and in particular relates to a fine denier boron oxide fiber impregnating agent and a preparation method thereof. The fine denier boron oxide fiber impregnating agent comprises n-dodecane, tetraethoxysilane and an organosilicon antistatic agent. The surface of precursor boron oxide fiber is coated with the fine denier boron oxide fiber impregnating agent, on one hand a dense protective film is formed on the surface of the boron oxide fiber for protecting the fiber, the strength of the boron oxide fiber can be improved; on the other hand the antistatic property of the fine denier boron oxide fiber can be improved, broken fiber filaments are reduced, the strength of the boron oxide fiber is improved, and a foundation for the preparation of high performance boron nitride fiber is established.

Description

technical field [0001] The invention belongs to the technical field of special ceramics, and in particular relates to a sizing agent for fine-denier boron oxide fibers and a preparation method thereof. Background technique [0002] Boron nitride (BN) fiber and its composite materials are widely used in high-end technical fields such as aerospace, nuclear industry and electronics due to their excellent comprehensive properties. Since the middle of the last century, developed countries represented by the United States and Russia have invested a lot of human and financial resources in the research and development of BN fiber and its composite materials, and applied them in new weapons, aerospace vehicles, high-energy batteries and other fields. The developed countries have always blocked the preparation technology of BN fiber from other countries, and the products have been listed as important strategic embargoed materials. [0003] At present, my country's BN fiber industry h...

Claims

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Application Information

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IPC IPC(8): C04B41/84
CPCC04B41/009C04B41/4905C04B41/84C04B41/46C04B35/01
Inventor 张铭霞林雪唐杰齐学礼王重海唐建新李茹李伶黄健孙淑敏
Owner SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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