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Quantitative detection method of graphene content in textiles

A quantitative detection method and quantitative detection technology, applied in the direction of removing certain components and weighing, etc., to achieve the effect of promoting the healthy development of the market

Active Publication Date: 2022-03-29
SHANGHAI INST OF QUALITY INSPECTION & TECHN RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a quantitative detection method for graphene content in textiles, to overcome the technical defects in the existing detection industry and to meet the needs of the healthy development of the graphene functional textile market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: the quantitative detection method of graphene in graphene viscose textile

[0030] Put 1.001g of graphene viscose functional textiles in a magnetic stirrer and a 250ml Erlenmeyer flask containing 100g of 75% sulfuric acid solution by weight, and stir at a constant speed at room temperature for 8 h at a stirring rate of 500 r / s until the fibers are completely Degrade;

[0031] Then put the Erlenmeyer flask into an ice-water bath, add a sodium hydroxide solution with a weight concentration of 50% to the reaction system, the system is neutral (tested with PH test paper), and the system contains degraded fiber molecules and acid-base And the resulting salt and graphene mixture.

[0032] The dialysate is deionized water;

[0033] Put the mixture of degraded fiber small molecules, acid-base neutralized salt and graphene into a dialysis bag, put the dialysis bag into a 2000 ml large beaker equipped with magnetic stirring, and add 1500 ml of dialysis solution in...

Embodiment 2

[0044] Embodiment 2: the quantitative detection method of graphene in graphene lyocell textile

[0045] (1) Acid degradation and alkali neutralization of lyocell textiles or fibers

[0046] Place 1.012g of lyocell textiles containing graphene in a 250 ml Erlenmeyer flask with magnetic stirring and 110 g of 75% sulfuric acid solution, stir at a constant speed for 8 h at room temperature, and stir at a rate of 500 r / s until the fibers are completely degraded;

[0047] Then the Erlenmeyer flask was put into an ice-water bath, and a sodium hydroxide alkali solution with a weight concentration of 75% was added until the reaction system was neutral. Finally, in the system were degraded fiber molecules and salts produced by acid-base neutralization and Graphene.

[0048] (2) solution dialysis method is carried out separation and quantitative detection to graphene in the textile:

[0049] Deionized water was used as the dialysate.

[0050] Put the degraded small fiber molecules, s...

Embodiment 3

[0056] Embodiment 3: the quantitative detection method of graphene in graphene modal textile

[0057] (1) Acid degradation and alkali neutralization of modal textiles or fibers

[0058] The modal textile that 1.015g contains graphene is placed in magnetic stirring and and contains 110g weight concentration and is in the 250ml Erlenmeyer flask of the sulfuric acid solution of 75%,

[0059] Stir at a constant speed at room temperature for 8 h at a stirring rate of 500 r / s until the fibers are completely degraded;

[0060] Then the Erlenmeyer flask was put into an ice-water bath, and a sodium hydroxide alkali solution with a weight concentration of 75% was added until the reaction system was neutral. Finally, in the system were degraded fiber molecules and salts produced by acid-base neutralization and Graphene.

[0061] (2) solution dialysis method is carried out separation and quantitative detection to graphene in the textile:

[0062] The dialysate is deionized water;

[006...

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Abstract

The invention discloses a quantitative detection method for graphene content in textiles, which comprises the following steps in sequence: (1) mixing a graphene-containing substance with excess acid, performing acidolysis until the graphene-containing substance is completely Degradation; (2) Then add alkaline substance solution to neutralize until the pH of the system is neutral; obtain the mixture of degraded fiber small molecules, salt and graphene produced by acid-base neutralization; (3) solution dialysis for textiles Separation and quantitative detection of graphene in the medium; (4) Graphene weight content, calculated according to formula (1), W G =m G / m 0 ×100% (1). The present invention separates the graphene doped in the textiles, conducts quantitative analysis on it, provides necessary technical reserves for the detection of graphene textiles in the future, and promotes the healthy development of my country's graphene functional textiles market.

Description

technical field [0001] The invention relates to a quantitative detection method for graphene content in materials. Background technique [0002] Graphene is a honeycomb planar film formed by sp2 hybridization of carbon atoms. It is a quasi-two-dimensional material with only one atomic layer thickness, so it is also called monoatomic layer graphite. Andre Geim and Konstantin Novoselov, physicists at the University of Manchester, UK, successfully separated graphene from graphite by micromechanical exfoliation, so they jointly won the 2010 Nobel Prize in Physics. The common powder production methods of graphene are mechanical exfoliation method, redox method, SiC epitaxial growth method, and the film production method is chemical vapor deposition (CVD). Due to its very good strength, flexibility, electrical conductivity, thermal conductivity, and optical properties, it has been greatly developed in the fields of physics, materials science, electronic information, computers, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 雒香庄园园李卫东陆华富王辰江高建国
Owner SHANGHAI INST OF QUALITY INSPECTION & TECHN RES
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