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High-elasticity conductive fiber and preparation method thereof

A conductive fiber, high elasticity technology, used in the manufacture of conductive/antistatic filaments, chemical characteristics of fibers, single-component polyamide rayon filaments, etc. and other problems, to achieve the effects of easy processing, low cost, and repeated stretching of electrical conductivity.

Active Publication Date: 2014-08-27
THE HONG KONG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, in the prior art, due to the van der Waals force between each other, carbon nanotubes are easy to bundle in polymer materials and difficult to disperse uniformly, which has not been overcome, which greatly affects the conductivity of composite materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0046] The preparation method of the highly elastic conductive fiber of the present invention is based on the fact that the carbon nanotubes pretreated by 1-butyl-3-methylimidazole (ionic liquid) can be well dispersed in the polymer matrix, and at the same time through directional stretching , which enables the ordered arrangement of carbon nanotubes in the polymer matrix to form a stable conductive network. Utilizing the excellent electrical and thermal conductivity of carbon nanotubes can effectively improve the safety and high-power characteristics of the highly elastic conductive fiber. At the same time, due to the good mechanical strength of the carbon nanotubes, the mechanical properties of the prepared conductive fibers can be improved while obtaining excellent electrical properties. The conductive fiber prepared by the preparation method of the invention has the advantages of low resistivity, good hand feeling, repeatable stretching and long-lasting conductivity, and t...

Embodiment 1

[0076] Embodiment 1-melt blending method

[0077] pretreated carbon nanotubes

[0078] Multi-walled carbon nanotubes are used and pretreated by dry mixing. First, mix the multi-walled carbon nanotubes and 1-butyl-3-methylimidazole (ionic liquid) according to the ratio and add them to the high-speed mixer, raise the temperature to 90-100°C, and stir at 4000 rpm for 10 minutes at a high speed. Then adjust to 1000 r / min and stir for 30 minutes to obtain pretreated multi-walled carbon nanotubes.

[0079] Preparation of multi-walled carbon nanotube / polymer blend masterbatch

[0080] Put 10 parts of pretreated multi-walled carbon nanotubes and 90 parts of polyurethane masterbatch into a high-speed mixer according to weight percentage, and stir the pretreated multiwalled carbon nanotubes and polyurethane masterbatch at a speed of 1000 rpm uniform. Then, the obtained multi-wall carbon nanotube / polyurethane blend masterbatch is added to a twin-screw extruder, and the extrusion t...

Embodiment 2

[0084] Embodiment 2-solution spinning method

[0085] pretreated carbon nanotubes

[0086] Multi-walled carbon nanotubes are used and pretreated by dry mixing. First, mix the multi-walled carbon nanotubes and 1-butyl-3-methylimidazole (ionic liquid) according to the ratio and add them to the high-speed mixer, raise the temperature to 90-100°C, and stir at 4000 rpm for 10 minutes at a high speed. Then adjust to 1000 r / min and stir for 30 minutes to obtain pretreated multi-walled carbon nanotubes.

[0087] Preparation of multi-walled carbon nanotube / polymer blend solutions

[0088] Put 90 parts of polyurethane masterbatch into the high-speed mixer according to weight percentage, then add 900 parts of tetrahydrofuran solution, and stir continuously for 24 hours at a speed of 1000 rpm to fully dissolve the polyurethane masterbatch into the tetrahydrofuran solution. Then add 10 parts of pretreated multi-walled carbon nanotubes to the polyurethane solution, stir at a high spee...

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Abstract

The invention discloses high-elasticity conductive fiber comprising the raw materials of: carbon nano-tubes, ionic liquid, and a high-elasticity polymer. A weight ratio of the carbon nano-tubes to the high-elasticity polymer is 1:8-20, and a weight ratio of the carbon nano-tubes to the ionic liquid is 4-6:1, wherein the ionic liquid is a salt of 1-butyl-3-methylimidazole selected from 1-butyl-3-methylimidazole trifluoromethanesulfonate, 1-butyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide, and 1-butyle-3-methylimidazolium hexafluorophosphate or mixture thereof. The invention also discloses a preparation method of the high-elasticity conductive fiber. The high-elasticity conductive fiber provided by the invention has both the high conductivity of carbon nano-tubes, and the mechanical properties of polymer fiber. Also, the high-elasticity conductive fiber can be uniaxially stretched by 100% with no substantial change in electrical properties.

Description

technical field [0001] The invention relates to the field of conductive polymers, in particular to a highly elastic conductive fiber and a preparation method thereof. Background technique [0002] With the increase in size and weight of electronic devices, the research on highly elastic conductive polymers has attracted widespread attention, and is expected to become a replacement product for traditional metal conductive materials. It can be used to prepare larger solar cells, sensors, electric actuators and other new flexible electronic products. Compared with traditional metal conductive materials, highly elastic conductive polymers have the advantages of being stretchable, foldable, and can be transformed into any complex curve shape, etc., and can be applied to any curved surface and the activities of large-area electronic products parts. [0003] At present, the preparation methods of conductive polymers mainly include the following three types: [0004] 1. Post-trea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F1/09D01F6/94D01F6/90D01F6/46
Inventor 尚颂民曾炜陶肖明
Owner THE HONG KONG POLYTECHNIC UNIV
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