A kind of flexible conductive fiber with core-sheath structure and preparation method thereof

Abstract

The invention belongs to the technical field of flexible conductive fibers for wearable electronic devices and its preparation, in particular to a conductive coaxial nanofiber with core-sheath structure aramid fibers or polyimide fibers wrapped with reduced graphene and its preparation method. The invention provides a method for preparing a conductive fiber with a core-sheath structure, the preparation method comprising the following steps: 1) preparing a core spinning solution; 2) preparing a sheath spinning solution; 3) preparing a coaxial fiber; 4 ) High-temperature thermal reduction: the coaxial fibers obtained in step 3) are subjected to high-temperature thermal reduction to obtain conductive coaxial nanofibers; that is, the conductive fibers with a core-sheath structure described in the present invention. In the method of the present invention, graphene oxide is used as the core layer material, and a high-temperature-resistant wet-spinning polymer is used as the sheath layer material, so that the core layer graphene oxide can be reduced by high-temperature thermal reduction, so that the obtained fiber has flexibility. It also has excellent electrical conductivity 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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