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Water-soluble polymer/graphene composite fiber as well as preparation method and application thereof

A water-soluble polymer and graphene composite technology, applied in the direction of spinning solution preparation, single-component synthetic polymer rayon, chemical post-treatment of synthetic polymer rayon, etc., can solve the problem of high brittleness of pure graphene fibers, Difficult to mix and disperse, high cost of raw materials, etc., to achieve the effects of easy continuous scale, wide application prospects, and easy operation

Active Publication Date: 2015-03-25
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a water-soluble polymer / graphene composite fiber and its preparation method and application, which solves the defects of high brittleness and low strength of pure graphene fiber, and the existing water-soluble polymer / graphene Problems such as difficulty in mixing and dispersing and high cost of raw materials in the preparation process of vinyl composite fibers

Method used

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  • Water-soluble polymer/graphene composite fiber as well as preparation method and application thereof
  • Water-soluble polymer/graphene composite fiber as well as preparation method and application thereof
  • Water-soluble polymer/graphene composite fiber as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] The process of preparing polyvinyl alcohol / graphene composite fibers with a spinning solution with a mass ratio of PVA / GO of 5 / 95 is as follows:

[0054] (1) 1.9 g of graphene oxide was added to 96 g of NaOH aqueous solution with a pH value of 10, and ultrasonically treated for 30 min to obtain a graphene oxide solution. Then add 2g of 5wt% (mass fraction) PVA aqueous solution, and add 5M NaOH solution to adjust the pH value to 11, and continue ultrasonic treatment for 30min to obtain a PVA / GO mass ratio of 5 / 95, a pH value of 11, and a solid content of 2%. Composite spinning solution of composite spinning solution.

[0055] (2) Extrude the composite spinning solution obtained in (1) through the spinneret hole at a speed of 1.5m / min into static methanol for solidification, lead the wet fiber out of the coagulation bath, dry it with hot air, and wind it on the silk tube , to obtain PVA / GO composite fibers; wherein, the winding line speed of the filament package is 1.5m / ...

Embodiment 2

[0059] The process of preparing polyvinyl alcohol / graphene composite fibers with a spinning solution with a mass ratio of PVA / GO of 10 / 90 is as follows:

[0060] (1) Add 1.8g graphene oxide and 4g 5wt% PVA aqueous solution to 94.2g water, use concentrated ammonia water to adjust the pH value to 9, then use a high-speed emulsifier to disperse and mix for 1 hour, and finally continue to add ammonia water to adjust the pH value to 11, A composite spinning solution is obtained.

[0061] (2) The composite spinning solution obtained in (1) is extruded at a speed of 1.5 m / min through a spinneret hole into a parallel-flowing 80% acetic acid aqueous solution and solidified into fibers. Wherein, the flow velocity of acetic acid is 1.5 m / min, that is, the drawing ratio of the nozzle is 1.0 times. Then the wet fiber was taken out of the coagulation bath, dried by hot air, and then wound continuously on the silk tube to obtain the PVA / GO composite fiber.

[0062] (3) The fibers obtained ...

Embodiment 3

[0065] The process of preparing polyvinyl alcohol / graphene composite fibers with a nozzle draw ratio of 1.0 times with a spinning solution with a PVA / GO mass ratio of 20 / 80 is as follows:

[0066] (1) Add 1.6g graphene oxide and 8g 5wt% PVA aqueous solution to 90.4g water, use concentrated ammonia water to adjust the pH value to 9, then use a high-speed emulsifier to disperse and mix for 1 hour, and finally continue to add ammonia water to adjust the pH value to 10, A composite spinning solution is obtained.

[0067] (2) The composite spinning solution obtained in (1) is extruded into rotating acetic acid with a speed of 1.5m / min through the spinneret hole and solidified into fibers, wherein the distance between the spinneret and the center of rotation is 3cm, and the speed of rotation is 8rpm , that is, the nozzle stretch ratio is 1.0 times. The wet fiber was taken out of the coagulation bath, dried by an infrared lamp, and then wound continuously on a silk tube to obtain a ...

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Abstract

The invention relates to water-soluble polymer / graphene composite fiber as well as a preparation method and application thereof. The cross section of the fiber is special-shaped, the surface of the fiber is of an orientated micro-fiber-shaped structure, the strength of the fiber is greater than 100 MPa, the elongation at break is greater than 2%, and the conductivity of the fiber is greater than 0.1 S / cm. The preparation method comprises the following steps: preparing a composite spinning liquid, extruding into a coagulating bath for curing, drafting, leading out of the coagulating bath, drying, and coiling, thereby obtaining the water-soluble polymer / graphene composite fiber; and finally reducing by using a chemical or physical method, thereby obtaining the water-soluble polymer / graphene composite fiber. The cross section of the composite fiber provided by the invention is of a special-shaped structure, the surface of the fiber is of a rich groove micro structure, the strength and the toughness of the fiber are greatly improved when being compared with those of pure graphene fiber, and good conductivity is still maintained, so that the water-soluble polymer / graphene composite fiber has a wide application prospect in the fields such as anti-electrostatic and conductive fabrics, electromagnetic wave absorption and shielding fabrics, energy storage devices, sensors and water treatment.

Description

technical field [0001] The invention belongs to the field of graphene composite fibers, in particular to a water-soluble polymer / graphene composite fiber and its preparation method and application. Background technique [0002] Graphene has a very high specific surface area and extremely excellent mechanical, thermal, electrical and optical properties, and has a very wide range of applications. At present, the macroscopic materials of graphene include powder, fiber, film, paper, aerogel, foam, etc. Among them, graphene fiber has very good flexibility and textile processability, and its strength, electrical conductivity, thermal conductivity and other properties are better. It is excellent, so it has a broader application prospect [0003] However, pure graphene fibers are composed of graphene nanosheets, which have low strength, high brittleness, and close packing between layers, which greatly limits their application. For this reason, researchers usually modify graphene f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F1/09D01F6/50D01F11/06D01D1/02D01D5/06H01M4/66H01G11/68H01L31/0224G01N27/00C09D5/24
CPCY02E60/10
Inventor 朱美芳陈少华麻伍军周哲
Owner DONGHUA UNIV
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