Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method and application of high-regularity graphene-doped carbon nanofiber

A nanofiber, graphene carbon technology, applied in the directions of nanotechnology, nanotechnology, fiber chemical characteristics, etc., can solve the problems of fiber defects, difficulty in dispersing graphene, agglomeration, etc., to reduce fiber diameter, reduce the number of defects, Improve the effect of orientation

Pending Publication Date: 2021-07-27
SHANDONG UNIV
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors have found that the currently commonly used method of introducing graphene for modification is mainly to dissolve polyacrylonitrile and graphene and then mix them with each other. Difficult, and when the concentration of graphene is slightly higher, agglomeration will occur due to the influence of π-π interaction, which will cause defects inside the prepared fiber

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method and application of high-regularity graphene-doped carbon nanofiber
  • Preparation method and application of high-regularity graphene-doped carbon nanofiber
  • Preparation method and application of high-regularity graphene-doped carbon nanofiber

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] In a typical embodiment of the present invention, a kind of preparation method of high regularity doped graphene carbon nanofiber is provided, and described preparation method comprises: the spinning solution that prepares is subjected to electrospinning treatment, then the obtained The nanofiber mat is obtained by successively hot drawing, pre-oxidation, carbonization and graphitization.

[0028] In yet another embodiment of the present invention, the specific preparation method of the spinning solution is as follows: uniformly mix acrylonitrile and doped graphene material in water, and use ammonium persulfate or ammonium persulfate-ammonium sulfite composite initiator The water-soluble initiator system initiates the polymerization reaction, and the product is dissolved in an organic solvent to obtain a spinning solution for subsequent processing; the present invention uses the polyacrylonitrile / graphene composite material prepared by aqueous phase precipitation polymer...

Embodiment 1

[0049] In the homogeneously mixed aqueous solution containing 30wt% acrylonitrile and 1wt% graphene, add dropwise an equal mass of ammonium sulfite and ammonium persulfate aqueous solution with a concentration of 3wt% to initiate polymerization. The polymerization time is 120min, and the polymerization temperature is 60°C. Wash and dry.

[0050] Dissolve the above-mentioned polyacrylonitrile / graphene composite material powder in dimethyl sulfoxide at 60°C to form a spinning stock solution with a concentration of 10wt%. After mixing evenly, pour the spinning stock solution into a 20ml needle tube. The needle tube is equipped with Electrospinning needles with an inner diameter of 0.5mm, the temperature inside the spinning machine is controlled at 40°C, the liquid supply speed is set at 3ml / h, and the spinning is performed under an electric field strength of 100kV / m, and the spinning needle tube is placed at a moving speed of 10mm / h. s, so that the silk is evenly sprayed on the t...

Embodiment 2

[0054] In a homogeneously mixed aqueous solution containing 20wt% acrylonitrile and 0.2wt% graphene oxide, add dropwise an equal mass of ammonium sulfite and ammonium persulfate aqueous solution with a concentration of 5wt% to initiate polymerization. The polymerization time is 120min, and the polymerization temperature is 55°C. The polymer is washed and dried.

[0055] Dissolve the above-mentioned polyacrylonitrile / graphene oxide composite material powder in dimethylformamide at 55°C to prepare a spinning stock solution with a concentration of 8wt%. After mixing evenly, pour the spinning stock solution into a 10ml needle tube, and assemble the needle tube There is an electrospinning needle with an inner diameter of 0.6mm, the temperature inside the spinning machine is controlled at 50°C, the liquid supply speed is set at 5ml / h, and the spinning is performed at an electric field strength of 150kV / m, and the spinning needle tube is placed at a moving speed of 15mm / s on the sli...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method and application of high-regularity graphene-doped carbon nanofiber, and belongs to the technical field of carbon fiber preparation. According to the invention, a polyacrylonitrile / graphene composite material is used as a raw material to realize the addition of graphene, precursor is prepared through an electrostatic spinning process, and finally, a high-performance carbon nanofiber material can be obtained through pre-oxidation, carbonization and graphitization treatment. The preparation method is short in preparation process flow and high in production efficiency; the nanoscale fiber diameter effectively avoids the generation of a skin-core structure in a heat treatment process; the doping of the graphene can accelerate the dissolution of a polymer raw material, so that the graphitization degree of the fiber is improved, and the mechanical property and the heat-conducting property of the carbon nanofiber are effectively enhanced; and the carbon nanofiber has good practical application value.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber preparation, and in particular relates to a preparation method and application of high-regularity doped graphene carbon nanofibers. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Since the 1960s, carbon fiber has gradually developed into an important industrial material. Due to the huge gap between theoretical and practical performance, higher performance carbon fiber has increasingly become people's unremitting pursuit. Since the electrospinning technology has matured, carbon nanofibers have been greatly developed. Compared with the complex spinning process of carbon fibers, the process ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D01F9/22H01M4/96B82Y30/00B82Y40/00
CPCD01F9/225H01M4/96B82Y30/00B82Y40/00Y02E60/50
Inventor 朱波张烨乔琨虞军伟
Owner SHANDONG UNIV