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Multifunctional coating for boron nitride fibers and preparation process of multifunctional coating

A multi-functional coating and boron nitride fiber technology, which is applied in fiber treatment, fiber type, textile and papermaking, etc., can solve the problem of BN fiber moisture resistance, poor oxidation resistance, restricting the development of BN fiber composite materials, and affecting the comprehensive performance of fibers problems such as improving moisture resistance and oxidation resistance, facilitating large-scale production, and repairing surface defects

Active Publication Date: 2017-06-27
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the particularity of the preparation process and the characteristics of the material itself, the moisture resistance and oxidation resistance of BN fiber are poor.
This shortcoming affects the improvement of the comprehensive performance of the fiber, which in turn restricts the development of BN fiber composite materials. Therefore, there is an urgent need for coating materials suitable for BN fiber, so as to effectively improve the moisture-proof and oxidation-resistant properties of BN fiber and repair the fiber surface. defects, enhance the tensile strength of fibers, and improve the comprehensive properties of fibers
[0004] Chinese patent CN100556860C discloses a boron nitride fiber surface coating treatment process, and discloses coating a layer of moisture-proof coating on the surface of boron nitride fiber, wherein the moisture-proof coating material is mixed by the following ingredients in volume ratio: The volume of xylene and silicone resin is (1-10): 1, plus 10-50% xylene silicone oil. The coating preparation process is simple, and it can simply and effectively improve the comprehensive performance of the fiber. However, the presence of the coating in the fiber accounts for Disadvantages such as large specific gravity, slow curing, inconvenient unwinding of dried fibers, and difficulty in coating removal

Method used

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  • Multifunctional coating for boron nitride fibers and preparation process of multifunctional coating
  • Multifunctional coating for boron nitride fibers and preparation process of multifunctional coating
  • Multifunctional coating for boron nitride fibers and preparation process of multifunctional coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Accurately weigh 15.000g tetraethyl orthosilicate, 2.000g hydrochloric acid (mass fraction 30%), and 8.000g ethanol into a plastic beaker with an analytical balance;

[0044] (2) Quickly transfer the mixture of these three solutions to a clean wide-mouth reagent bottle and magnetically stir for 12 hours; advantages: firstly, the raw materials are mixed together evenly, and the transfer and stirring prevent the solution from volatilizing on the one hand, and on the other hand make the three substances Fully participate in the response.

[0045] (3) Add 20.000 g of ethanol to (2) and stir for 1 min;

[0046] (4) Filter the mixed solution in (3) into a pre-marked reagent bottle using chrysanthemum fast filter paper to obtain the stock solution of the BN fiber multifunctional coating, and the mass percentage concentration is 9.6%;

[0047] (5) According to a certain ratio, the stock solution in (4) is diluted with 40.000 g of ethanol to a coating with a concentration o...

Embodiment 2

[0053] (1) Accurately weigh 30.000g tetraethyl orthosilicate, 8.000g nitric acid (30% by mass fraction), and 20.000g ethanol into a plastic beaker with an analytical balance;

[0054] (2) The mixture of these three solutions is quickly transferred to a clean wide-mouth reagent bottle and magnetically stirred for 60 hours;

[0055] (3) Add 60.000g butyl acetate to (2) and stir for 30min;

[0056] (4) Filter the mixed solution in (3) into a pre-marked reagent bottle using chrysanthemum fast filter paper to obtain the stock solution of the BN fiber multifunctional coating, and the mass percentage concentration is 7.33%;

[0057] (5) According to a certain ratio, the stock solution in (4) is diluted with 120.000 g of ethanol to a coating with a concentration of 3.63% by mass;

[0058] The boron nitride fiber strength of embodiment 2 coating treatment is 1368MPa, and the average value of fiber strength is 1359MPa after the BN fiber that has been processed is placed in the air for 12...

Embodiment 3

[0060] (1) Accurately weigh 20.000g tetraethyl orthosilicate, 6.000g sulfuric acid (30% by mass fraction), and 18.000g n-dodecane into a plastic beaker with an analytical balance;

[0061] (2) The mixture of these three solutions is quickly transferred to a clean wide-mouth reagent bottle and magnetically stirred for 24 hours;

[0062] (3) Add 50.000g butyl acetate to (2) and stir for 10min;

[0063] (4) Filter the mixed solution in (3) into a pre-marked reagent bottle using chrysanthemum fast filter paper to obtain the stock solution of the BN fiber multifunctional coating, and the mass percentage concentration is 6.14%;

[0064] (5) According to a certain ratio, the stock solution in (4) is diluted with 140.000 g of ethanol to a coating with a concentration of 2.46% by mass;

[0065] The boron nitride fiber strength of embodiment 3 coating treatment is 1380MPa, and the average value of fiber strength is 1369MPa after the processed BN fiber is placed in the air for 12 hours,...

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Abstract

The invention discloses a multifunctional coating for boron nitride fibers and a preparation process of the multifunctional coating. The multifunctional coating is prepared from, by mass, 15-30 parts of tetraethoxysilane and 8-20 parts of an organic solvent by mixing. The preparation process includes: subjecting raw materials to mixing and stirring for reaction, and filtering after reaction to obtain stock solution of the BN (boron nitride) fiber multifunctional coating. The coating is light in weight, easy in curing, convenient for fiber unwinding and easy to remove, humidity resistance and oxidation resistance of the BN fibers can be improved effectively, repairing of BN fiber surface defects is realized, tensile strength of the fibers is enhanced, and comprehensive performances of the fibers are improved.

Description

technical field [0001] The invention belongs to the technical field of special ceramics, and relates to a multifunctional coating for boron nitride fibers and a preparation process thereof. Background technique [0002] With the rapid development of cutting-edge technology fields such as aerospace, new energy and nuclear industry, the demand for new materials is particularly urgent. BN ceramic fiber has comprehensive properties such as high temperature resistance, ablation resistance, and good wave transmission performance. It has extremely broad application prospects in high-end technical fields such as aviation, aerospace, new energy, and nuclear industry. It is a key model of new weapons and a key economic development. Key raw materials for both military and civilian purposes with broad application prospects in the field. [0003] In China, the preparation method of BN fiber is mainly the inorganic chemical conversion method. Due to the particularity of the preparation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/507D06M101/00
CPCD06M13/507D06M2101/00
Inventor 张铭霞李勇栾强李茹齐学礼唐建新魏美玲唐杰王守兴
Owner SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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