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Method for preparing single ultra-long micron or nanometer conductive fiber

A nano-conductive, single-fiber technology, applied in the direction of fiber type, fiber treatment, fiber chemical characteristics, etc., can solve the problem of limited application, unstable electrospinning fibers, and it is difficult to prepare highly oriented, separable single-length fibers. Fiber and other problems, to achieve the effect of stable vertical drop and improved electrical conductivity

Inactive Publication Date: 2019-03-19
NANJING UNIV OF POSTS & TELECOMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, electrospun fibers are unstable, and it is difficult to prepare highly oriented, separable single long fibers, which also limits the further application of this technology.

Method used

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  • Method for preparing single ultra-long micron or nanometer conductive fiber

Examples

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Effect test

Embodiment 1

[0032] Electrospinning prepares semiconductor photocatalytic materials into fibers with diameters of microns or nanometers, and uses photocatalytic methods to reduce metal salts and attach them to the surface of fibers to form micron or nanoscale conductive fibers. The method steps are as follows:

[0033] Step a1, when preparing the spinning solution, adding the semiconductor photocatalyst material and its dispersant, and dispersing to obtain the spinning solution;

[0034] Step a2, on the substrate, using the electrospinning principle to make the spinning solution obtained in step a1 into micron or nanometer single fibers;

[0035] Step a3, immersing the fiber obtained in step a2 into a metal salt solution, reducing the metal ions on the surface of the fiber to elemental metal under light irradiation; drying and sintering to obtain a single ultra-long micron or nanoscale conductive fiber.

[0036] Concretely adopt preferred embodiment as follows:

[0037] (1) Add 1.0gTiO ...

Embodiment 2

[0040] Electrospinning prepares micron or nanoscale fibers containing reducing agents. The fibers are immersed in a metal salt solution, the metal is reduced, and after sintering, it adheres to the fiber surface to form micron or nanoscale conductive fibers. The method steps are as follows:

[0041] Step b1, when preparing the spinning solution, adding the metal reducing agent and dispersing to obtain the spinning solution;

[0042] Step b2, on the substrate, using the electrospinning principle to make the spinning solution obtained in step b1 into micron or nanometer single fibers;

[0043] Step b3, immerse the fiber obtained in step b2 into the metal salt solution, and under the action of the metal reducing agent in the fiber, the metal ion is reduced to elemental metal on the surface of the fiber; after drying, it is sintered in a nitrogen atmosphere to obtain a single ultra-long micron Or nanoscale conductive fibers.

[0044] Concretely adopt preferred embodiment as foll...

Embodiment 3

[0048] Micro or nano fibers are prepared by electrospinning. The fibers are immersed in the silver mirror reaction solution, and the silver is reduced and aggregated on the surface of the fibers to form micro or nano conductive fibers. The method steps are as follows:

[0049] Step c1, dissolving the reducing agent of the high polymer and silver nitrate, mechanically stirring until the solution is uniform, and then standing still to obtain a spinning solution;

[0050] Step c2, using the electrospinning principle to prepare the spinning solution in step c1 into micron or nanometer single fibers on the substrate;

[0051] In step c3, immerse the fiber obtained in step c2 in a silver nitrate solution, then transfer it to the solution where the silver mirror reaction is taking place for reaction, dry and sinter to obtain a single ultra-long micron or nanometer conductive fiber.

[0052] Concretely adopt preferred embodiment as follows:

[0053] (1) Add 1.0g of PVB (polyvinyl bu...

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Abstract

The invention discloses a method for preparing a single ultra-long micron or nanometer conductive fiber. A first method includes steps: adding a micron or nanometer material with a photocatalysis property or a metal salt reducing agent into spinning solution, and preparing the spinning solution into single fibers in nanometer or micron diameters according to an electrostatic spinning principle; soaking the fibers into metal salt solution, reducing metal ions into elementary metal according to a reduction principle, and enabling the elementary metal to be attached to the fiber surface to obtainthe nanometer or micron conductive fiber. A second method includes steps: uniformly dispersing a conductive component in solution to obtain the spinning solution, and preparing the single conductivefiber according to the electrostatic spinning or coaxial electrostatic spinning principle. The micron or nanometer conductive fiber is prepared by aftertreatment or doping of a conductive component inthe spinning solution. The method is simple and easy in operation and can be applied to fields of flexible sensors, electronic skin, large-size flexible display, electromagnetic shielding, solar batteries and the like.

Description

technical field [0001] The invention belongs to the field of preparation of superfine conductive fibers, and in particular relates to a method for preparing single conductive micron fibers by electrostatic spinning technology. Background technique [0002] At present, flexible sensing, electronic skin, wearable devices, and large-area displays have entered a period of rapid development. The conductive materials and methods commonly used in these technologies include transparent conductive oxides (TCO), metal grids, silver nanowires, and so on. Among them, indium tin oxide (ITO) is the most widely used transparent conductive oxide (TCO). For ITO film or conductive fiber, its transmittance can reach more than 90% in the visible light range, and its reflectance in the infrared region is also 85%. % or more, the combination of the two with its low resistivity makes ITO the most widely used transparent conductive material today. However, ITO is highly brittle and easy to break,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/83D01F6/50D01F1/10D01F6/56D01F1/09D06M101/24
CPCD01F1/09D01F1/10D01F6/50D01F6/56D06M11/83D06M2101/24
Inventor 魏昂郑丽华位威刘泽江
Owner NANJING UNIV OF POSTS & TELECOMM
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