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Oxidized graphene dry-jetting and wet-spinning method

A graphene, dry spray wet technology, applied in dry spinning, wet spinning, textiles and papermaking, etc., can solve problems such as unfavorable industrial production, low graphene fiber strength, complicated spinning raw material preparation process, etc. It is convenient for industrial production, eliminating the screening process and improving the effect of strength

Inactive Publication Date: 2017-06-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional graphene fiber preparation methods include wet spinning method, hydrothermal method, etc. The hydrothermal method is to inject a certain concentration of graphene oxide aqueous solution into a capillary tube with a diameter of 400 microns and heat it to prepare graphene fibers. After high temperature treatment, the fiber strength is improved, but it is not conducive to industrial production. There are many researches on wet spinning, mainly for the screening of graphene oxide sheets, the selection of coagulation bath, the selection of spinning solution concentration, etc., but the spinning The preparation process of raw materials is complicated, and the strength of the spun graphene fibers is not high, so how to spin high-performance graphene fibers requires a new spinning method

Method used

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Embodiment 1

[0038] A kind of graphene oxide dry jet wet spinning spinning method, concrete steps are:

[0039] 1. Prepare graphene oxide by the improved Hummers method:

[0040] Step 1: Mix 360 milliliters of concentrated sulfuric acid (80% to 99%) and 40 milliliters of phosphoric acid (40% to 99%) in a volume ratio of 9:1 and place in an ice bath, slowly add 3g of 80 mesh graphite And 18g potassium permanganate, and stir with glass rod, obtain mixed solution;

[0041] Step 2: Magnetically stir the mixture obtained in Step 1 at 50°C for 12 hours. After cooling to room temperature, put it in an ice bath and add 20ml of 30% hydrogen peroxide solution until the solution turns bright yellow;

[0042] Step 3: Dilute the solution obtained in step 2 to 1 liter to 2 liters with deionized water, vacuum filter to remove the strong acid in the mixed solution, and wash the solid obtained by suction filtration with 200-500 ml of 30% hydrochloric acid, Then perform vacuum filtration to obtain graphen...

Embodiment 2

[0050] A kind of graphene oxide dry jet wet spinning spinning method, concrete steps are:

[0051] 1. Prepare graphene oxide by the improved Hummers method:

[0052] Step 1: Mix 360 milliliters of concentrated sulfuric acid (80% to 99%) and 40 milliliters of phosphoric acid (40% to 99%) in a volume ratio of 9:1 and place in an ice bath, slowly add 3g of 325 mesh graphite And 18g potassium permanganate, and stir with glass rod, obtain mixed solution;

[0053] Step 2: Magnetically stir the mixture obtained in Step 1 at 50°C for 12 hours. After cooling to room temperature, put it in an ice bath and add 20ml of 30% hydrogen peroxide solution until the solution turns bright yellow;

[0054] Step 3: Dilute the solution obtained in step 2 to 1 liter to 2 liters with deionized water, vacuum filter to remove the strong acid in the mixed solution, and wash the solid obtained by suction filtration with 200-500 ml of 30% hydrochloric acid, Then perform vacuum filtration to obtain graphe...

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Abstract

The invention provides an oxidized graphene dry-jetting and wet-spinning method. The oxidized graphene dry-jetting and wet-spinning method is characterized in that an improved Hummers method is adopted to prepare oxidized graphene, an oxidized graphenespinning solution is prepared after washing and is extruded out of a capillary spinning tube and enters a coagulating bath through an air layer to solidify, colloid fiber is obtained, and graphene fiber is prepared through reduction after drying. The graphene slice layer screening process can be omitted, industrial production is promoted, the draft multiple of the colloid fiber can be improved through the air layer by adopting the oxidized graphene dry-jetting and wet-spinning method, the orientation of the slice layer in the fiber is improved, and the fiber strength is improved.

Description

technical field [0001] The invention relates to a novel spinning method for preparing high-performance graphene fibers. Background technique [0002] Since graphene was discovered in 2004, due to its high strength, high specific surface area, high thermal conductivity, and high electrical conductivity, it has been a research hotspot in the field of materials. How to prepare high-performance graphene fibers with the structure closest to carbon fibers, and then Replacing carbon fibers has always been a scientific research problem, and graphene oxide, as a chemical derivative of graphene, has liquid crystal properties, so high-performance graphene fibers can be spun with reference to poly-p-phenylene terephthalamide liquid crystal spinning. The traditional preparation methods of graphene fibers include wet spinning method, hydrothermal method, etc. The hydrothermal method is to inject a certain concentration of graphene oxide aqueous solution into a capillary tube with a diamet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/12D01D5/04D01D5/06
CPCD01D5/04D01D5/06D01F9/12
Inventor 姚澜郑贤宏俞生海梅小雪许昌亮邱夷平
Owner DONGHUA UNIV
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