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Preparation method of high-strength graphene fibers

A high-strength graphite and graphene technology, applied in the chemical characteristics of fibers, textiles and papermaking, chemical post-processing of rayon, etc., can solve the problems of low strength, uneven structure, and difficulty of graphene fibers, and achieve excellent mechanical properties, Simple operation method and low cost effect

Active Publication Date: 2015-09-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the graphene fibers obtained by these methods have low strength, uneven structure, and easy fracture, which are difficult to meet the requirements of practical use.

Method used

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  • Preparation method of high-strength graphene fibers
  • Preparation method of high-strength graphene fibers
  • Preparation method of high-strength graphene fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) At room temperature, weigh 200 mg of graphite oxide prepared by the improved Hummers method and place it in a 100 mL beaker, then add 20 mL of deionized water to make a dispersion with a concentration of 10 mg / mL, and then place the beaker into ultrasound Treat the graphite oxide in the pool for 3 hours to peel off the graphite oxide into graphene oxide to obtain 20 mL of a uniformly dispersed graphene oxide solution, then add 100 mg of sodium polyacrylate, and magnetically stir for 24 hours to form a graphene oxide / sodium polyacrylate gel-like spinning stock solution;

[0032] (2) Put the graphene oxide / sodium polyacrylate gel-like spinning stock solution into a 20mL syringe connected with a 500μm polytetrafluoroethylene microtube, and install it on a pusher with a pushing speed of 5mL / h. The graphene oxide / sodium polyacrylate gel is extruded orderly through the microtubes into a petri dish containing 95% alcohol by volume, and placed for 0.5h, then taken out and dried...

Embodiment 2

[0036] (1) At room temperature, weigh 200 mg of graphite oxide prepared by the improved Hummers method and place it in a 100 mL beaker, then add 20 mL of deionized water to make a dispersion with a concentration of 10 mg / mL, and then place the beaker into ultrasound Treat the graphite oxide in the pool for 3 hours to peel off the graphite oxide into graphene oxide to obtain 20 mL of a uniformly dispersed graphene oxide solution, then add 200 mg of sodium polyacrylate, and magnetically stir for 24 hours to form a graphene oxide / sodium polyacrylate gel-like spinning stock solution;

[0037] (2) Put the graphene oxide / sodium polyacrylate gel-like spinning stock solution into a 20mL syringe connected with a 500μm polytetrafluoroethylene microtube, and install it on a pusher with a pushing speed of 5mL / h. The graphene oxide / sodium polyacrylate gel is extruded orderly through the microtubes into a petri dish containing 95% alcohol by volume, and placed for 0.5h, then taken out and dried...

Embodiment 3

[0041] (1) At room temperature, weigh 200 mg of graphite oxide prepared by the improved Hummers method and place it in a 100 mL beaker, then add 20 mL of deionized water to make a dispersion with a concentration of 10 mg / mL, and then place the beaker into ultrasound Treat the graphite oxide in the pool for 3 hours to peel off the graphite oxide into graphene oxide to obtain 20 mL of a uniformly dispersed graphene oxide solution, then add 400 mg of sodium polyacrylate and magnetically stir for 24 hours to form a graphene oxide / sodium polyacrylate gel-like spinning stock solution;

[0042] (2) Put the graphene oxide / sodium polyacrylate gel-like spinning stock solution into a 20mL syringe connected with a 500μm polytetrafluoroethylene microtube, and install it on a pusher with a pushing speed of 5mL / h. The graphene oxide / sodium polyacrylate gel is extruded orderly through the microtubes into a petri dish containing 95% alcohol by volume, and placed for 0.5h, then taken out and dried ...

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Abstract

The invention relates to a preparation method of high-strength graphene fibers. The preparation method comprises the following steps: adding graphene oxide prepared by use of the improved Hummers method into distilled water, performing ultrasonic treatment to obtain a graphene oxide dispersion, next, adding sodium polyacrylate, and magnetically stirring to obtain an even graphene oxide / sodium polyacrylate gelatinous spinning solution; squeezing the obtained gelatinous spinning solution into coagulating bath having the volumetric ethyl alcohol content of 95% by using a syringe, and taking out for airing 0.5-1 hour later to obtain the graphene oxide fibers; reducing the obtained graphene oxide fibers by use of hydroiodic acid having the mass fraction of 55% for 0.5-1 hour, cleaning and airing to obtain the high-strength graphene fibers. The preparation method is simple and low in cost, and prone to industrialization. The high-strength graphene fibers obtained by use of the preparation method are high in quality, high in strength and stable in performance, and have huge application prospect in the fields of flexible electronic elements, flexible energy storage devices, sensing devices and the like.

Description

Technical field [0001] The invention belongs to the field of preparation of graphene fibers, and particularly relates to a method for preparing high-strength graphene fibers. Background technique [0002] Graphene is composed of carbon atoms with SP 2 A new material with a single-layer sheet structure composed of a regular hexagonal periodic honeycomb lattice structure composed of hybrids has a special two-dimensional structure and excellent performance. The thickness of a single layer of graphene is about 0.35nm, which has high transparency and thermal conductivity, rigidity, and high conductivity. Micro-scale two-dimensional graphene can form macroscopic three-dimensional materials through self-assembly, such as graphene aerogels and hydrogels with three-dimensional porous structures; graphene films formed by stacking graphene sheets; graphene sheets in Graphene fibers formed by self-assembly in micro-pipes. Macroscopic graphene-based materials have been widely used in many a...

Claims

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Application Information

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IPC IPC(8): D01F9/12D01F11/12
Inventor 王宏志时秋伟李耀刚张青红侯成义
Owner DONGHUA UNIV
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