Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of graphene/polypyrrole nanoparticle with negative dielectric constant

A negative dielectric constant, pyrrole nanotechnology, applied in the field of graphene/polypyrrole nanoparticle preparation, can solve problems such as difficulty in achieving negative dielectric constant

Inactive Publication Date: 2018-09-11
TONGJI UNIV
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene / polypyrrole nanoparticles synthesized by these oxidants and protonic acids have positive dielectric constants, making it difficult to achieve negative dielectric constants.

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 of graphene/polypyrrole nanoparticle with negative dielectric constant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: The present embodiment is a kind of preparation method of the graphene / polypyrrole nanoparticle with negative dielectric constant, carries out according to the following steps:

[0017] (1) Preparation of dispersion A: Weigh 0.1 mol of hydrochloric acid, 0.06 mol of potassium dichromate and 10% graphene, and add them into 300 ml of water. Ultrasonic dispersion for 50 minutes (power 320W) to fully disperse the oxidant, protonic acid and graphene in water.

[0018] (2) Preparation of dispersion B: 0.08 mol of pyrrole (Py) dispersed in 60 ml of water, Py dispersion in ice-water mixture, ultrasonic 50 min, power 320W.

[0019] (3) Preparation of graphene / polypyrrole nanoparticles: the dispersion A was placed in the ice-water mixture contained in the crystallization dish, and the crystallization dish was placed on a magnetic stirrer stirring at a speed of 900 r / min. When the temperature of the dispersion is lower than 10°C, add the dispersion B dropwise while ...

Embodiment 2

[0024] Embodiment 2: The present embodiment is a kind of preparation method of the graphene / polypyrrole nanoparticle with negative dielectric constant, carries out according to the following steps:

[0025] (1) Preparation of dispersion A: Weigh 0.1 mol of salicylic acid, 0.06 mol of ferric chloride and 30% graphene, and add to 300 ml of water. Ultrasonic dispersion for 50min (power 320W) to fully disperse ferric chloride, tartaric acid and graphene in water.

[0026] (2) Preparation of dispersion B: 0.08 mol of pyrrole (Py) dispersed in 60 ml of water, Py dispersion in ice-water mixture, ultrasonic 50 min, power 320W.

[0027] (3) Preparation of graphene / polypyrrole nanoparticles: the dispersion A was placed in the ice-water mixture contained in the crystallization dish, and the crystallization dish was placed on a magnetic stirrer stirring at a speed of 900 r / min. When the temperature of the dispersion is lower than 10°C, add the dispersion B dropwise while stirring, and 60...

Embodiment 3

[0032] Embodiment 3: The present embodiment is a kind of preparation method of the graphene / polypyrrole nanoparticle with negative dielectric constant, carries out according to the following steps:

[0033] (1) Preparation of dispersion A: Weigh 0.1 mol of p-toluenesulfonic acid, 0.06 mol of potassium dichromate and 50% graphene, and add to 300 ml of water. Ultrasonic dispersion for 50 minutes (power 320W) to fully disperse the oxidant, protonic acid and graphene in water.

[0034] (2) Preparation of dispersion B: 0.08 mol of pyrrole (Py) dispersed in 60 ml of water, Py dispersion in ice-water mixture, ultrasonic 50 min, power 320W.

[0035] (3) Preparation of graphene / polypyrrole nanoparticles: the dispersion A was placed in the ice-water mixture contained in the crystallization dish, and the crystallization dish was placed on a magnetic stirrer stirring at a speed of 800 r / min. When the temperature of the dispersion is lower than 10°C, add the dispersion B dropwise while st...

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

No PUM Login to View More

Abstract

The invention relates to a preparation method of a graphene / polypyrrole nanoparticle with a negative dielectric constant and relates to a graphene / polypyrrole nanoparticle preparation method. Comparedwith a dielectric constant epsilon of graphene / polypyrrole synthesized by an existing method, the graphene / polypyrrole nanoparticle prepared by the preparation method disclosed by the invention has the negative value characteristic, and a dielectric constant epsilon of the graphene / polypyrrole nanoparticle is -1.226*10<5> to -398.38. According to the preparation method, a metamaterial is preparedby a material synthesizing method, so that application of the metamaterial in the fields of invisibility, micro antennas, electronic components and the like is beneficial to be expanded. The graphene / polypyrrole nanoparticle prepared by the preparation method disclosed by the invention is in a powder shape and has an even particle size. The preparation method disclosed by the invention can be applied to preparing a nano-composite electromagnetic metamaterial.

Description

technical field [0001] The invention relates to a method for preparing graphene / polypyrrole nanoparticles with negative dielectric constant. Background technique [0002] Professor J.B.Pendry from the United Kingdom discovered in 2000 that metal wires and metal resonant structural units can be used to achieve negative permittivity and negative magnetic permeability in the microwave frequency band, and people have devoted themselves to researching various structures to achieve negative permittivity. . But few researchers have investigated synthetic materials with negative dielectric constants. As a typical conductive polymer, polypyrrole has broad application prospects and important application values ​​in the fields of catalysis, capacitors, information storage, secondary batteries, and electromagnetic wave absorption. At present, the in-situ polymerization of graphene / polypyrrole nanoparticles can use a variety of protonic acids and oxidants, such as protonic acids can us...

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): C08L79/04C08K3/04C08G73/06
CPCC08G73/0611C08K3/042C08L79/04
Inventor 邱军秦歌
Owner TONGJI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com