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

Method for testing surface free energy of graphene by using inverse gas chromatographic method

An inverse gas chromatography, graphene surface technology, applied in the field of nanomaterial characterization, can solve the problems of poor repeatability and complicated operation, and achieve the effect of high repeatability, simple operation and reliable data

Inactive Publication Date: 2014-11-26
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the prior art of measuring graphene surface free energy which are cumbersome to operate and poor in repeatability, the object of the invention is to provide a method for testing graphene surface free energy by inverse gas chromatography. The method is simple to operate and highly repeatable. accurate and reliable

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
  • Method for testing surface free energy of graphene by using inverse gas chromatographic method
  • Method for testing surface free energy of graphene by using inverse gas chromatographic method
  • Method for testing surface free energy of graphene by using inverse gas chromatographic method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The present invention will be further described in detail below in combination with specific embodiments.

[0037] Concrete steps of the present invention are as follows:

[0038] 1) Dry the graphene sample to be tested in a vacuum oven at 200° C. for 5 hours.

[0039] 2) Put 0.35 g of the sample obtained in step 1) into a clean stainless steel packed column with an inner diameter of 3 mm, an outer diameter of 4 mm, and a length of 30 cm; before filling, the packed column should be purified, washed with acetone, dried at high temperature, and then filled into graphene.

[0040] 3) Before the test, the packed column should be activated to eliminate the effect of surface volatile substances on the graphene adsorption performance. The specific operation is: install the packed column obtained in step 2) on the chromatograph, and under the condition that the oven temperature is 180°C and the helium gas flow rate is about 16mL / min, only helium gas is passed through, and the...

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
Surface energyaaaaaaaaaa
The inside diameter ofaaaaaaaaaa
Outer diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for testing the surface free energy of graphene by using an inverse gas chromatographic method. The method comprises the following steps: (1) sufficiently drying a graphene sample to be tested in a vacuum drying box; (2) filling a filling column with the sample; (3) mounting the filling column on a chromatographic instrument, introducing helium, and activating the filling column for more than 10 hours; (4) setting parameters of the chromatographic instrument, injecting probe molecules by using a microsyringe under the conditions that the temperature of a column box is 180 DEG C and the carrier gas flow is about 10ml / minute, wherein the non-polar probe molecule is n-5-8 alkyl, and the polar probe molecule is chloroform, tetrahydrofuran, acetone and acetonitrile; (5) starting to acquire data once completing the injection of the non-polar probe molecules and the polar probe molecules respectively in the step (4); and (6) calculating the surface free energy. The method is easy to operate, high in repeatability and reliable in data.

Description

technical field [0001] The invention relates to graphene, specifically a method for testing graphene surface free energy by inverse gas chromatography, and belongs to the technical field of nanometer material characterization. Background technique [0002] Keeping the temperature, pressure and composition constant, the increase in Gibbs free energy per unit surface area is called surface Gibbs free energy, referred to as surface free energy or surface energy, expressed by the symbol r, and the unit is J / m 2 , Joule / square meter. The surface free energy is divided into two parts, the dispersion free energy of the non-polar part and the polar part of the surface free energy. Graphene is a new material with a single-layer sheet structure composed of carbon atoms. It is currently the thinnest but hardest nanomaterial in the world. Due to its excellent mechanical, electrical, thermal, and optical properties, it has great application prospects in the fields of material science, ...

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): G01N30/89
Inventor 陈建龚勇张华知胥会朱晓飞蒋文平
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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