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

A conductive fiber, core-sheath technology, applied in the field of flexible conductive fibers and their preparation, can solve the problems of difficulty in reducing the inner layer graphene oxide, loss of graphene conductivity, insufficient reduction, etc., and achieve good dispersibility and spinnability. , Improve the electrical conductivity and enhance the effect of electrical conductivity

Active Publication Date: 2019-05-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) Prepare large sheets of GO by the improved Hummers method, and then remove excess acid and unexfoliated expanded graphite by centrifugation to obtain GO aqueous solution; then centrifuge at 12000rad / min for 30min to obtain GO with a concentration of 20mg / ml aqueous solution;

[0038] (2) Take 20ml of GO solution with the same solubility, then add 100mg of GNPs, stir and ultrasonically disperse for 15min, and further mix in AR-100 stirring and defoaming machine for 3min, degassing for 1min to obtain a uniformly mixed suspension as the core layer spinning solution;

[0039] (3) Weigh Kevlar 49 and KOH 6.73g and add them to 300ml DMSO, after sealing, stir and dissolve at room temperature for two weeks, then further centrifuge at 8000rad / min for 5 minutes to remove undissolved KOH in the suspension, and prepare The ANF / DMSO solution of 2wt% solubility, as sheath layer spinning solution;

[0040] (4) Take an appropriate amount of step (2) and (3) core layer spinning so...

Embodiment 2

[0043] (1) Prepare large sheets of GO by the improved Hummers method, and then remove excess acid and unexfoliated expanded graphite by centrifugation to obtain GO aqueous solution; then centrifuge at 12000rad / min for 30min to obtain GO with a concentration of 20mg / ml solution;

[0044] (2) Take 20ml of GO solution with the same solubility, then add 200mg of GNPs, stir and ultrasonically disperse for 15min, and further mix in AR-100 stirring defoaming machine for 3min, degassing for 1min to obtain a uniformly mixed suspension as the core layer spinning solution;

[0045] (3) Weigh Kevlar 49 and KOH 6.73g and add them to 300ml DMSO, after sealing, stir and dissolve at room temperature for two weeks, then further centrifuge at 8000rad / min for 5 minutes to remove undissolved KOH in the suspension, and prepare The ANF / DMSO solution of 2wt% solubility, as sheath layer spinning solution;

[0046] (4) Take an appropriate amount of step (2) and (3) core layer spinning solution and s...

Embodiment 3

[0057] (1) Prepare large sheets of GO by the improved Hummers method, and then remove excess acid and unexfoliated expanded graphite by centrifugation to obtain GO aqueous solution; then centrifuge at 10000rad / min for 30min to obtain GO with a concentration of 15mg / ml solution;

[0058] (2) Take 20ml of GO solution with the same solubility, then add 100mg of GNPs, stir and ultrasonically disperse for 15min, and further mix in AR-100 stirring and defoaming machine for 3min, degassing for 1min to obtain a uniformly mixed suspension as the core layer spinning solution;

[0059] (3) Weigh Kevlar 49 and KOH 6.73g and add them to 300ml DMSO, after sealing, stir and dissolve at room temperature for two weeks, then further centrifuge at 8000rad / min for 5 minutes to remove undissolved KOH in the suspension, and prepare The ANF / DMSO solution of 2wt% solubility, as sheath layer spinning solution;

[0060] (4) Take an appropriate amount of step (2) and (3) core layer spinning solution a...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/12D01F8/16D01F8/18D01D5/34
Inventor 陈枫张祥傅强
Owner SICHUAN UNIV
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