High-temperature heat-insulation noise-reduction bent ceramic fiber and preparation method thereof

Nanocerite fibers with curved structures are prepared through uniaxial electrospinning technology, which solves the problem of poor sound absorption performance of existing fiber materials in high-temperature environments, and achieves efficient high-temperature noise reduction and thermal stability. It is suitable for high-temperature thermal insulation applications in the aerospace field.

CN119710984AInactive Publication Date: 2025-03-28CIVIL AVIATION UNIV OF CHINA
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Patent Information

Application Number
CN202510213619.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-26
Publication Date
2025-03-28
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing fiber porous sound-absorbing materials have complex preparation processes and poor sound absorption performance under high temperature environments and insufficient thermal stability, making it difficult to achieve effective high-temperature noise reduction in the aerospace field.

Method used

Using uniaxial electrospinning technology, the polycarbosilane pioneer solution and polyvinylpyrrolidone spun spunting agent solution were mixed with titanium dioxide powder, and cross-linked and cured after electrospinning, and pyrolysis was performed under the protection of nitrogen atmosphere to prepare nanoceramic fibers with a curved structure.

Benefits of technology

It has achieved efficient noise reduction function and excellent thermal stability in high-temperature environments. It has simple preparation process and is suitable for large-scale production. It is suitable for high-temperature thermal insulation and noise reduction applications in the aerospace field.

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Abstract

The invention belongs to the technical field of ceramic fibers, and discloses a high-temperature heat-insulation noise-reduction bent ceramic fiber and a preparation method thereof.The preparation method comprises the steps that firstly, a polycarbosilane precursor solution, a polyvinylpyrrolidone spinning aid solution and titanium dioxide powder are mixed and stirred to be uniform, and a spinning solution is prepared; then performing electrostatic spinning on the spinning solution to obtain composite nanofibers; and finally, carrying out cross-linking curing on the composite nanofiber, and pyrolyzing under the protection of a nitrogen atmosphere. By controlling the electric field distribution, the receiving distance, the raw material composition ratio and the calcination temperature in the spinning process, asymmetric deformation is generated by utilizing two components, and the nano ceramic fiber of a bent structure is formed. The bent ceramic fiber disclosed by the invention is simple in preparation process, has excellent high-temperature heat insulation performance and noise reduction performance, and shows a wide application prospect in the aerospace field needing heat and sound protection.
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