Humidity-sensitive telescopic polyaniline conductive fiber and preparation method thereof

Abstract

The invention discloses a humidity-sensitive telescopic polyaniline conductive fiber and a preparation method thereof. The fiber comprises a template fiber body and a proton-acid-doped polyaniline conductive layer wrapping the template fiber body. The template fiber body is polyurethane core-spun cotton yarn with polyurethane as an inner thread, a cotton yarn thread wound on the polyurethane inner thread in a bent mode wraps the inner thread, and the cotton yarn thread is evenly wrapped in the conductive layer formed by proton-acid-doped polyaniline. The fiber has excellent stretch bending performance, the conductivity of the fiber can still be kept relatively stable when the fiber is in a stretch bending state, and the variation amplitude is very small. Besides, the conductive fiber is sensitive to humidity, the conductivity of the fiber changes obviously along with humidity, the preparation method is simple, cost is low, and the fiber is suitable for large-scale production and can be used for preparing flexible wires and flexible humidity-sensitive sensors.

Description

technical field [0001] The invention relates to a moisture-sensitive stretchable polyaniline conductive fiber and a preparation method thereof, belonging to the field of conductive material preparation. Background technique [0002] With the continuous improvement of the level of technological development, people's demand for wearable devices has been increasing in recent years. World-renowned companies such as Apple of the United States and Samsung of South Korea have entered this field one after another and developed related products. Sensors are an important part of contemporary electronic equipment. How to prepare wearable sensor components of different types and uses has become a hot spot in contemporary scientific and technological research. The related fields involve material development, manufacturing process innovation and other fields. [0003] As a widely researched conductive polymer material, polyaniline has the advantages of diverse structure, unique doping mec...

AI Technical Summary

Problems solved by technology

However, the conductive fibers prepared by these two methods are not scalable

Chinese patent (patent publication number: CN102692288A) discloses a preparation method of a flexible force-sensitive sensor. The invention makes a flexible force-sensitive sensor of nanostructure conductive polyaniline coaxial ordered fibers, and the conductive polyaniline flexible fiber has good mechanical properties , unbreakable, high sensitivity, short response time, but the degree of fiber stretching is limited (only 4% of the original length), and the preparation method is relatively complicated

At the same time, the electrical conductivity of the material prepared by the existing method will decrease significantly with the increase of its own deformation, which is not suitable for the preparation of flexible sensors with wearable properties.

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