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Preparation method of graphene-based composite conductive and thermally conductive fiber material with imitation shell structure

A graphene-based, composite conductive technology, which is applied to the chemical characteristics of fibers, rayon manufacturing, textiles and papermaking, etc., can solve the problems affecting the electrical and thermal conductivity, and the electrical and thermal conductivity is less involved, so as to achieve the improvement of electrical and thermal conductivity and increase the electrical conductivity. Effects of Conduction and Thermal Conduction Channels

Active Publication Date: 2020-08-25
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these patents only focus on the improvement of the strength of graphene fibers or fabrics, and rarely involve their electrical and thermal conductivity.
[0004] In addition, the above-mentioned patents only deal with the preparation of pure graphene fibers or fabrics
In pure graphene fibers, there are a large number of gaps between graphene sheets, which will become scattering sites for electron and phonon conduction, thereby affecting the improvement of the electrical and thermal conductivity of graphene fibers or fabric materials.

Method used

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  • Preparation method of graphene-based composite conductive and thermally conductive fiber material with imitation shell structure
  • Preparation method of graphene-based composite conductive and thermally conductive fiber material with imitation shell structure
  • Preparation method of graphene-based composite conductive and thermally conductive fiber material with imitation shell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Using expanded graphite as raw material, graphene oxide aqueous dispersion was prepared by modified Hummers method.

[0036] Add a certain quality of plant raw materials into a 1:1 mixed solution of concentrated sulfuric acid and deionized water, heat and hydrolyze at 65°C for 1.5h, stop heating and add deionized water to dilute, let stand overnight, remove the supernatant, and centrifuge to wash , dialysis, and ultrasound to obtain a cellulose nanocrystal solution.

[0037] The prepared graphene oxide aqueous dispersion, cellulose nanocrystal solution, and carbon quantum dot solution are mixed with a solute mass ratio of 1:1:0.2, stirred, concentrated, and prepared into a pre-spinning solution. The pre-spinning solution is placed in isopropanol, a spinning coagulation liquid, and wet-spun at a speed of 0.5 mm / min to obtain graphene-based composite fibers or fabrics. Anneal and reduce the obtained fiber or fabric at a high temperature of 1500°C for 2 hours.

[0038] ...

Embodiment 2

[0048] Using expanded graphite as raw material, graphene oxide aqueous dispersion was prepared by modified Hummers method.

[0049] Add a certain quality of plant raw materials into a 1:1 mixed solution of concentrated sulfuric acid and deionized water, heat and hydrolyze at 65°C for 1.5h, stop heating and add deionized water to dilute, let stand overnight, remove the supernatant, and centrifuge to wash , dialysis, and ultrasound to obtain a cellulose nanocrystal solution.

[0050] The prepared graphene oxide aqueous dispersion, cellulose nanocrystal solution, and carbon quantum dot solution are mixed with a solute mass ratio of 1.6:0.4:0.2, stirred, concentrated, and prepared into a pre-spinning solution. The pre-spinning solution is placed in isopropanol, a spinning coagulation liquid, and wet-spun at a speed of 0.5 mm / min to obtain graphene-based composite fibers or fabrics. Anneal and reduce the obtained fiber or fabric at a high temperature of 1500°C for 2 hours.

Embodiment 3

[0052] Using expanded graphite as raw material, graphene oxide aqueous dispersion was prepared by modified Hummers method.

[0053] Add a certain quality of plant raw materials into a 1:1 mixed solution of concentrated sulfuric acid and deionized water, heat and hydrolyze at 65°C for 1.5h, stop heating and add deionized water to dilute, let stand overnight, remove the supernatant, and centrifuge to wash , dialysis, and ultrasound to obtain a cellulose nanocrystal solution.

[0054] The prepared graphene oxide aqueous dispersion, cellulose nanocrystal solution, and carbon quantum dot solution are mixed with a solute mass ratio of 0.4:1.6:0.2, stirred, concentrated, and prepared into a pre-spinning solution. The pre-spinning solution is placed in isopropanol, a spinning coagulation liquid, and wet-spun at a speed of 0.5 mm / min to obtain graphene-based composite fibers or fabrics. Anneal and reduce the obtained fiber or fabric at a high temperature of 1500°C for 2 hours.

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Abstract

The invention relates to a preparation method of a graphene-based composite conductive and heat-conducting fiber material with the shell-like structure. The preparation method includes the steps of 1), mixing, stirring and concentrating a graphene oxide solution, a cellulose nanocrystallline solution and a carbon quantum dot solution to prepare a spinning solution; 2), placing the spinning solution obtained in the step 1) in an organic solution for wet spinning to obtain a graphene-based composite fiber material; 3), annealing and reducing the graphene-based composite fiber material obtained in the step 2) at high temperature to obtain the final product. Compared with the prior art, the preparation method has the advantages that cellulose nanocrystals and carbon quantum dots are embedded between graphene layers to construct the layered shell-like structure of graphene, and therefore, the conductivity and heat conductivity of graphene-based composite fibers or fabrics can be improved.

Description

technical field [0001] The invention belongs to the technical field of composite fiber materials, and relates to a preparation method of a graphene-based composite conductive and heat-conducting fiber material with a shell-like structure. Background technique [0002] Flexible electronic devices refer to electronic devices that can still work normally under a certain range of deformation conditions. Devices based on fiber structures are important components of flexible electronics. Compared with other materials, carbon materials have many advantages such as high electrical and thermal conductivity, light density, and low thermal expansion coefficient. They can replace traditional materials and meet the requirements of functionalization, miniaturization, and thinning of wearable and flexible electronic devices. [0003] Among many carbon materials, graphene has attracted extensive attention due to its special structure and excellent performance. Graphene is a single-layer t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/12D01F1/10
Inventor 朱申敏孟鑫张剑宇李尧曾科南潘辉刘思远
Owner SHANGHAI JIAOTONG UNIV
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