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Application of carbon nanotube-grafted carbon fiber composite filiform filler in vaporizing chamber of gas chromatograph

A gas chromatograph and carbon nanotube technology, which is applied in the field of high-temperature resistant composite filamentary fillers, can solve problems such as unsatisfactory analysis results, and achieve the effects of reducing sample discrimination, good chemical and thermal stability, and long service life

Active Publication Date: 2016-07-20
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the analysis of complex samples, especially the part with high boiling range, the analysis results are not ideal. In order to improve the peak shape, improve the sensitivity and reliability, and increase the service life of the packing, it is urgent to develop a new high-temperature resistant liner packing material with a larger specific surface area.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1 Preparation of Carbon Nanotube Grafted Carbon Fiber Composite Filamentous Filler

[0013] ① Carbon fiber treatment: Take 0.5g of carbon fiber in a 250mL round bottom flask, add 50mL of concentrated nitric acid, heat and reflux for 6h, after the reaction is completed, use ultrapure water to wash until neutral, dry for later use; weigh 0.5g of acid oxidized carbon fiber Add to the Erlenmeyer flask, add 0.03M 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC), hexamethylenediamine and 50mL N,N-dimethylformamide to the conical Shaped bottle, ultrasonic-assisted reaction, the gained amidated carbon fiber is stored for subsequent use after drying;

[0014] ② Treatment of carbon nanotubes: Weigh 0.1g of multi-walled carbon nanotubes (MCNTs) into a 250mL round bottom flask, add 100mL of concentrated sulfuric acid / concentrated nitric acid (V / V, 3 / 1), after ultrasonic dispersion, heat to reflux for 8h . After the reaction is completed, the acid-oxidized ...

Embodiment 2

[0016] Example 2 Preparation of Carbon Nanotube Grafted Carbon Fiber Composite Filamentous Filler

[0017] ①Carbon fiber treatment: Take 0.5g of carbon fiber in a 250mL round bottom flask, add 50mL of concentrated nitric acid, heat and reflux for 7 hours, after the reaction is completed, use ultrapure water to wash until neutral, dry for later use; weigh 0.5g of acid-oxidized carbon fiber Add to the Erlenmeyer flask, add 0.03M 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC), hexamethylenediamine and 50mL N,N-dimethylformamide to the conical In the shaped bottle, the reaction is assisted by ultrasound, and the resulting amidated carbon fiber is dried and stored for later use;

[0018] ② Treatment of carbon nanotubes: Weigh 0.1g of multi-walled carbon nanotubes (MCNTs) into a 250mL round bottom flask, add 100mL of concentrated sulfuric acid / concentrated nitric acid (V / V, 3 / 1), after ultrasonic dispersion, heat to reflux for 6h . After the reaction is completed...

Embodiment 3

[0020] Example 3 Preparation of Carbon Nanotube Grafted Carbon Fiber Composite Filamentous Filler

[0021] ① Carbon fiber treatment: Take 0.5g of carbon fiber in a 250mL round bottom flask, add 50mL of concentrated nitric acid, heat and reflux for 8h, after the reaction is completed, use ultrapure water to wash until neutral, dry for later use; weigh 0.5g of acid oxidized carbon fiber Add to the Erlenmeyer flask, add 0.03M 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC), hexamethylenediamine and 50mL N,N-dimethylformamide to the conical Shaped bottle, ultrasonic-assisted reaction, the gained amidated carbon fiber is stored for subsequent use after drying;

[0022] ② Treatment of carbon nanotubes: Weigh 0.1g of multi-walled carbon nanotubes (MCNTs) into a 250mL round bottom flask, add 100mL of concentrated sulfuric acid / concentrated nitric acid (V / V, 3 / 1), after ultrasonic dispersion, heat and reflux for 7h . After the reaction is completed, the acid-oxidized...

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Abstract

The invention discloses application of a carbon nanotube-grafted carbon fiber composite filiform filler in a vaporizing chamber of a gas chromatograph. The carbon nanotube-grafted carbon fiber composite filiform filler is placed in the vaporizing chamber of the gas chromatograph. The carbon nanotube-grafted carbon fiber composite filiform filler has the advantages of a great specific surface area, high temperature resistance, good chemical and thermal stability, long service life, etc., is applicable to detection of trace substances in low-boiling-point substances and complex matrixes, and has wide application prospects.

Description

technical field [0001] The invention discloses the application of a high-temperature-resistant composite filamentary filler of carbon nanotube grafted carbon fiber in a gasification chamber of a gas chromatograph. The filamentary filler has the advantages of large specific surface area, high temperature resistance, good chemical and thermal stability, and long service life. It is suitable for the detection of low boiling point substances and trace substances in complex matrices, and has broad application prospects. Background technique [0002] A gas chromatograph generally includes six basic units: ①gas system ②sampling system ③separation system ④detection system ⑤data acquisition and processing system ⑥temperature control system, in which the sampling system is one of the important components of the gas chromatograph. The chemical chamber is critical for sample introduction and modification. The requirements for the gasification chamber are that the sample can be vaporize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
Inventor 戚欢阳师彦平陈厚芳孙英佩
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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