A mechanically responsive color-changing blue phase liquid crystal polymer fiber and a preparation method and application thereof

The method for preparing blue phase liquid crystal polymer fibers with a core-sheath structure solves the problem of the complexity of preparing blue phase liquid crystal fibers, and achieves a highly efficient and stable mechanical response color-changing effect, which is suitable for the fields of sensors, displays, stealth, and anti-counterfeiting.

CN119531008BActive Publication Date: 2025-10-17UNIV OF SCI & TECH BEIJING +1
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Patent Information

Application Number
CN202411548121.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-01
Publication Date
2025-10-17
Estimated Expiration
2044-11-01

AI Technical Summary

Technical Problem

Existing blue phase liquid crystal fiber manufacturing processes are complex, have poor processability, and are difficult to produce efficiently.

Method used

The blue phase liquid crystal polymer fiber adopts a skin-core structure, the skin layer is a blue phase liquid crystal layer, and the core layer is a polymer fiber monofilament. Through rapid cooling and ultraviolet light polymerization preparation method, a stable three-dimensional cubic lattice structure is formed to achieve mechanical response color change.

Benefits of technology

The preparation process is simple, and blue phase liquid crystal fibers with good lattice structure, large plates and controllable response speed are obtained. They have high color rendering and reversible color-changing behavior, and are suitable for sensor, display, stealth and anti-counterfeiting fields.

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Abstract

The present application relates to the technical field of mechanochromic materials, and discloses a blue-phase liquid crystal polymer fiber that changes color in response to mechanical force, and its preparation method and application. The blue-phase liquid crystal polymer fiber that changes color in response to mechanical force has a skin-core structure, wherein the skin layer is a blue-phase liquid crystal layer, and the core layer is a polymer fiber monofilament; the blue-phase liquid crystal polymer fiber can change color in response to stress changes. When an external force is applied to the blue-phase liquid crystal polymer fiber of the present application, the lattice constant of the blue-phase liquid crystal changes, thereby causing the reflection wavelength to change color. Because it has a stable polymer network structure, it has reversible color change behavior; the preparation method of the present application is simple, and a blue-phase structure with a good lattice structure and large plates can be obtained by rapid cooling; the prepared blue-phase liquid crystal polymer fiber has good processability and high performance, and has very good application potential in the fields of sensors, displays, stealth and anti-counterfeiting.
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Citation Information

Patent Citations

  • Stretchable blue-phase liquid crystal elastomer and preparation method thereof

    CN114164008A

  • Core-sheath force-induced color-changing liquid crystal elastic fiber and preparation method thereof

    CN117702480A