Flexible conductive fiber with sheath-core structure and preparation method thereof

Abstract

The invention belongs to the technical field of flexible conductive fibers for wearable electronic devices and preparation thereof, specifically relates to a conductive coaxial nanofiber with a sheath-core structure of an aramid fiber or a polyamide fiber coating a reduced graphene oxide and a preparation method thereof, and provides a preparation method of a conductive fiber with a sheath-core structure. The preparation method of the conductive fiber with the sheath-core structure comprises the steps that (1), a core layer spinning solution is prepared; (2) a sheath layer spinning solution isprepared; (3) a coaxial fiber is prepared; and (4), high-temperature thermal reduction is conducted, specifically, the coaxial fiber obtained in the step (3) is subjected to the high-temperature thermal reduction to obtain a conductive coaxial nanofiber, that is, the conductive fiber with the sheath-core structure. According to the preparation method of the conductive fiber with the sheath-core structure, graphene oxide is used as the core layer material, and the high temperature resistant wet spinning polymer is used as the sheath layer material, thus reduction of the core layer graphene oxide through the high temperature thermal reduction can be realized, so that the obtained fiber has flexibility and also has the excellent electrical and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of flexible conductive fibers used in wearable electronic devices and its preparation, and particularly relates to a conductive coaxial nanofiber in which aramid fiber or polyamide fiber with a core-sheath structure wraps reduced graphene and a preparation method thereof. Background technique [0002] In recent years, with the development of science and technology, a new generation of artificial intelligence is booming around the world, and it is also profoundly changing people's production and lifestyle. As an indispensable technology application in the era of artificial intelligence, flexible and wearable smart electronic devices are developing by leaps and bounds. Especially in the field of medical diagnosis, through the combination of flexible electronic devices and spinning technology, smart clothing with comprehensive characteristics such as wearability, comfort, and timely feedback can be realized, th...

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Problems solved by technology

[0005] Due to the poor dispersibility of the advanced carbon material used in the core layer, it is generally necessary to use a graphene oxide aqueous solution with liquid crystal behavior and good dispersibility as the inner layer spinning solution. When graphene oxide is selected as the core layer material, due to the external Under the wrapping and isolation of the layer polymer, it is difficult to realize the reduction of the inner layer of graphene oxide and the conditions are complicated, which will inevitably lead to insufficient reduction and loss of the excellent electrical conductivity of graphene. Therefore, it is necessary to develop a method that can ensure the The reduction of inner graphene oxide is achieved without affecting the structure, so that the resulting fiber has excellent electrical conductivity while being flexible

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