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A sizing agent for improving the aging resistance of alumina continuous fiber and its preparation method and application

A technology of continuous fiber and sizing agent, which is applied in the field of surface modification of inorganic ceramic fibers, can solve the problems such as the inability to increase the mechanical properties of fiber wear resistance, the unsatisfactory improvement effect of fiber service cycle, and the insignificant anti-aging effect. Co-adhesion of the film, good clustering and lubricity, low static electricity

Active Publication Date: 2022-01-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although polyvinyl butyral is disclosed in the above-mentioned prior art, how it is applied to alumina continuous fibers is not disclosed, and the formulation disclosed in the above-mentioned patent documents is directly used to coat alumina continuous fibers On the surface, there are the following defects: 1. The anti-aging effect is not obvious, and the improvement effect of the service life of the fiber and subsequent processing and use is not ideal. 2. The fiber cannot be bundled, and the wear resistance of the fiber cannot be increased to improve its mechanical properties.

Method used

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  • A sizing agent for improving the aging resistance of alumina continuous fiber and its preparation method and application
  • A sizing agent for improving the aging resistance of alumina continuous fiber and its preparation method and application

Examples

Experimental program
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Embodiment 1

[0031] Example 1: A preparation process of a sizing agent for improving the aging resistance of alumina continuous fibers:

[0032] S1: dilute 0.5-2wt% polyvinyl butyral resin with 15-25 times of organic solvent, and stir for 0.5-2 hours;

[0033] S2: dilute 0.5-2wt% lubricant with 15-25 times of organic solvent, and stir for 0.5-2 hours;

[0034] S3: Dissolving 0.05-0.2wt% antistatic agent with 15-25 times of organic solvent, stirring time is 0.5-2h;

[0035]S4: The solutions in steps S1, S2, and S3 are sequentially added to the remaining organic solvent, mixed evenly, and stirred for 1-2 hours to obtain the sizing agent for improving the aging resistance of the alumina continuous fiber.

[0036] It can be understood that the properties of the PVB used are: the butyral content in the polyvinyl butyral resin is 45-50wt%, and the viscosity is 15-18mPa . s. The molecular weight is 280-310.

[0037] It can be understood that the mass percentages of all material components in t...

Embodiment 2

[0040] Example 2: Characterization:

[0041] The sizing agents in Example 1 were coated on the surface of the alumina continuous fibers at a coating rate of 1.4-1.9 wt%. Performance tests were performed on the continuous fibers coated with the sizing agents. The test results are shown in Table 1 below.

[0042] In this example, the performance of alumina continuous fibers after coating the sizing agent on the alumina continuous fiber precursors, and the performance of alumina continuous fibers (including fiber precursors and fibers coated with sizing agent) after aging at 100°C were tested respectively. Fiber properties, fiber properties after ultraviolet aging of alumina continuous fibers (including fiber precursors and fibers coated with sizing agent).

[0043] It can be understood that the alumina continuous fibers used in each embodiment are the same batch of finished fibers.

[0044] It can be understood that the aging method of alumina continuous fiber coated with sizin...

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Abstract

The invention discloses a sizing agent for improving the aging resistance of alumina continuous fibers and its preparation method and application, wherein the sizing agent includes 0.5-2% of polyvinyl butyral resin, 0.5-2% of 2% lubricant, 0.05-0.2% antistatic agent, and the balance is organic solvent. The film-forming agent used is an alcohol-soluble polymer, and its solution is a stable and transparent uniform solution. After being used in alumina continuous fiber, on the one hand, it can prevent the fiber from being affected by the aging of the external environment and maintain the performance of the fiber itself. On the other hand, the sizing itself has the effect of aging resistance after forming a film, and can make the fiber have better mechanical properties, which can improve the wear resistance of the fiber. On the basis of meeting the requirements of its coating rate, the fiber is relatively soft. Keep bright white appearance and stable mechanical properties for a long time, which can meet the requirements of subsequent textile processing.

Description

technical field [0001] The application belongs to the technical field of surface modification of inorganic ceramic fibers, and in particular relates to a sizing agent for improving the aging resistance of alumina continuous fibers and its preparation method and application. Background technique [0002] Alumina continuous fiber is a kind of new high-performance ceramic fiber, which has excellent properties such as high temperature resistance, corrosion resistance, high strength and high modulus, and has strategic significance in military industry, aerospace and other fields. But at the same time, alumina continuous fiber is a brittle material with low bending strength. Alumina continuous fibers are prone to surface cracks and defects during a series of forming processes such as spinning, sintering, and drawing, and the size, number, and distribution of defects and cracks will affect the properties of the fibers, and it is impossible to obtain perfect fibers in this process. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/83
CPCC04B41/83C04B41/4873C04B41/4896C04B41/009C04B41/46C04B41/4535C04B41/4584C04B14/4625
Inventor 王安琪贾玉娜陈代荣焦秀玲
Owner SHANDONG UNIV