Preparation method of conductive nanofiber yarn and preparation method of nanofiber yarn knitted fabric three-way strain sensor

Conductive nanofiber yarn prepared by electrospinning is combined with water-soluble vinylon yarn and knitted into a triaxial strain sensor. This solves the problems of washability, abrasion resistance and breathability of fabric strain sensors, and realizes effective monitoring of multi-directional tension and pressure, which is suitable for the development of smart textiles.

CN118374915BActive Publication Date: 2026-06-30SUZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SUZHOU UNIV
Filing Date
2024-04-23
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing fabric strain sensors are inadequate in terms of washability, abrasion resistance, and breathability, and cannot effectively monitor multi-directional tensile and compressive coupling simultaneously.

Method used

Conductive nanofiber yarn was prepared by electrospinning. The conductive nanomaterial was combined with an elastic polymer solution, and the nanofiber yarn was formed by bonding and drying. The yarn was then knitted with water-soluble vinylon yarn to form a triaxial strain sensor. Multiaxial strain monitoring was achieved by designing the knitted fabric structure.

Benefits of technology

The fabricated sensor exhibits high sensitivity under longitudinal tension and significant anisotropy under transverse tension, demonstrating excellent pressure sensing performance. Furthermore, it requires no encapsulation and can be integrated into textile fabrics, making it suitable for the development of smart textiles.

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Abstract

This invention discloses a method for preparing conductive nanofiber yarn and a method for preparing a triaxial strain sensor for nanofiber yarn knitted fabric. First, multiple conductive nanofiber bundles are bonded together into an elastic nanofiber yarn using a self-adhesive device. Then, the conductive nanofiber yarn and water-soluble vinylon yarn are co-fed and knitted using a flat knitting machine. Further, the water-soluble vinylon yarn is removed by water immersion to obtain a pure conductive nanofiber yarn knitted fabric. Finally, electrodes are used to connect the two ends of the conductive nanofiber yarn in the knitted fabric to wires to prepare a flexible strain sensor sensitive to longitudinal tension, transverse tension, and vertical pressure. This invention can integrate the sensing fabric into the textile material, enabling the development of smart textiles that combine aesthetics and comfort, and offering significant advantages in detecting human movement and physiological information.
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