Self-extension graphene and preparation method thereof

A graphene and sulfonated graphene technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems that have not been reported, easy to wrinkle, easy to form stacked structures, etc.

Inactive Publication Date: 2012-09-19
WUHAN UNIV OF TECH
View PDF1 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter which form of chemical modification is used, the resulting final product exhibits a wrinkled, stacked structure
If a chemically modified graphene capable of spontaneous extension and flattening is prepared, the performance of graphene-based functional composite materials and devices will be greatly improved. No report

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
  • Self-extension graphene and preparation method thereof
  • Self-extension graphene and preparation method thereof
  • Self-extension graphene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: In parts by mass, add 2 parts of flake graphite and 1 part of sodium nitrate into a reactor filled with 50 parts of concentrated sulfuric acid (98%), place the mixed system under an ice-water bath, stir rapidly to make the mixture uniform, and distribute Add 10 parts of potassium permanganate at a time to control the temperature of the system below 20 °C, then raise the temperature of the system to 30 °C, keep stirring at a constant speed for 3 hours, dilute with 150 parts of deionized water, and then add 10 parts of concentration 30wt% hydrogen peroxide solution, and then filtered through a nylon filter membrane with a pore size of 220 nm, and repeatedly washed 3 times with 1 mol / liter hydrochloric acid, and redispersed the filter cake in 150 parts of deionized water, at 4000 rpm Centrifuge at a rotating speed of 20 minutes, and finally dry the obtained liquid part for 24 hours to obtain graphene oxide; in parts by mass, 1 part of graphene oxide is added to...

Embodiment 2

[0022] Example 2: In parts by mass, add 5 parts of flake graphite and 3 parts of sodium nitrate into a reactor containing 150 parts of concentrated sulfuric acid (98%), place the mixed system under an ice-water bath, stir rapidly to make the mixture uniform, and divide Add 30 parts of potassium permanganate to control the temperature of the system below 20 °C, then raise the temperature of the system to 35 °C, keep stirring at a constant speed for 4 hours and dilute with 300 parts of deionized water, then add 30 parts of concentration 30wt % hydrogen peroxide solution, and then filtered through a nylon filter membrane with a pore size of 220 nm, and washed 3 times with 1 mol / L hydrochloric acid, and redispersed the filter cake in 400 parts of deionized water at a speed of 4000 rpm Centrifuge for 25 minutes, and finally dry the obtained liquid part for 40 hours to obtain graphene oxide; in parts by mass, add 1 part of graphene oxide to a reactor containing 1000 parts of deioni...

Embodiment 3

[0023] Example 3: In parts by mass, add 9 parts of flake graphite and 6 parts of sodium nitrate into a reactor filled with 300 parts of concentrated sulfuric acid (98%), place the mixed system under an ice-water bath, stir quickly to make the mixture uniform, and divide Add 60 parts of potassium permanganate to control the temperature of the system below 20°C, then raise the temperature of the system to 40°C, keep stirring at a constant speed for 5 hours and dilute with 500 parts of deionized water, then add 60 parts of 30wt % hydrogen peroxide solution, and then filtered through a nylon filter membrane with a pore size of 220 nm, and washed 3 times with 1 mol / L hydrochloric acid, and redispersed the filter cake in 700 parts of deionized water at a speed of 4000 rpm Centrifuge for 30 minutes, and finally dry the obtained liquid part for 48 hours to obtain graphene oxide; in parts by mass, 1 part of graphene oxide is added to a reactor containing 1600 parts of deionized water,...

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
thicknessaaaaaaaaaa
transmittivityaaaaaaaaaa
Login to view more

Abstract

The invention relates to self-extension graphene and a preparation method thereof. The self-extension graphene is a reduced graphene oxide modified by organic oligomer ionic liquid and is represented as a glutinous black wax-like substance at the room temperature of 25 DEG C, and when the temperature is above 80 DEG C, the self-extension graphene is represented as a flowable state without adding any solvent. The preparation method comprises the following steps of: taking flaky graphite as a raw material, adopting a strong oxidant to perform oxidation, and further performing ultrasonic exfoliation to prepare a graphene oxide; utilizing sodium borohydride to perform partial reduction on the graphene oxide in an ultrasonic oscillation environment; adopting an aryl diazo compound with a sulfonic acid group to perform chemical modification on the graphene oxide which is partially reduced so as to obtain a sulfonated graphene oxide, and further performing secondary reduction on the product with hydrazine hydrate to obtain sulfonated graphene; and adopting the organic oligomer ionic liquid to perform ion exchange with the sulfonated graphene so as to obtain the self-extension graphene. The electric conductivity of a thin film prepared by the self-extension graphene is more than 15 times of that of an ordinary graphene thin film prepared under the same conditions.

Description

technical field [0001] The invention relates to a class of self-extensible graphene and a preparation method thereof, in particular to a class of reduced graphene oxide modified with an organic oligomer ionic liquid, which can be applied to the field of high-performance polymer-based nanocomposite materials and microelectronic devices. Background technique [0002] Graphene is a carbonaceous material with a two-dimensional honeycomb lattice structure formed by a single layer of carbon atoms tightly packed, with a thickness of only 0.335 nanometers, which is equivalent to one-two-thousandth of a hair. Each carbon atom that makes up graphene is represented by sp 2 The hybrid orbital arrangement is connected with the other three adjacent carbon atoms by σ bonds, and forms a π bond in the direction perpendicular to the lattice plane, overlapping with the π bonds of adjacent carbon atoms to form long-range conjugation structure. It is the special two-dimensional crystal structu...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/192
Inventor 熊传溪李琦董丽杰孙凡谢海安
Owner WUHAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap