Core-shell structure fiber with strain-insensitive conductive property and electromagnetic wave absorption-reflection cyclic loss mechanism, and preparation method and application thereof

By designing core-shell structure fibers and using coaxial wet spinning technology, the problems of easy breakage of conductive fibers under dynamic strain and electromagnetic wave reflection have been solved, achieving strain-insensitive conductivity and high-efficiency electromagnetic shielding. It is suitable for stretchable multifunctional fabrics and electromagnetic protection.

CN122279804APending Publication Date: 2026-06-26DONGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DONGHUA UNIV
Filing Date
2026-05-26
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing conductive fibers are prone to breakage or contact failure under dynamic strain, resulting in increased resistance and making it difficult to meet the long-term stable operation requirements of wearable devices. Furthermore, traditional metallized fabrics cause electromagnetic wave reflection, which cannot effectively solve the problem of electromagnetic radiation pollution.

Method used

The fiber adopts a core-shell structure, with the core layer containing liquid metal particles and micron-sized pores, and the shell layer containing MXene. It is prepared by coaxial wet spinning to form a sea-island structure and a porous network, thereby achieving strain-insensitive conductivity and electromagnetic wave absorption-reflection cycle loss mechanism.

Benefits of technology

It maintains conductivity stability under high strain, significantly improves electromagnetic shielding effectiveness, reduces electromagnetic wave reflection, and achieves efficient electromagnetic wave absorption. It is suitable for stretchable multifunctional fabrics, ensuring stable transmission of electrical signals and human protection.

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Abstract

This invention belongs to the field of fiber material technology and discloses a core-shell structure fiber with strain-insensitive conductivity and an electromagnetic wave absorption-reflection cycle loss mechanism, as well as its preparation method and application. The core-shell structure fiber has a core-shell structure; the core layer includes a flexible core matrix and liquid metal particles uniformly dispersed therein; the shell layer includes a flexible shell matrix and MXene uniformly dispersed therein. The preparation method involves coaxial wet spinning of the core layer spinning solution (including the flexible core matrix, liquid metal particles, and organic solvent) and the shell layer spinning solution (including the flexible shell matrix, MXene, and organic solvent). Its application is that it can be used to weave into stretchable multifunctional fabrics. The core-shell structure fiber of this invention possesses both excellent flexible strain-insensitive properties and electromagnetic shielding function with absorption as the main function, ensuring stable transmission of electrical signals in electronic devices and effectively solving the problem of secondary electromagnetic radiation pollution.
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