Stirring extraction bar with composite carbon nanofiber coating and preparation method thereof

A nano carbon fiber, extraction rod technology, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., can solve the problems of SBSE technology application limitations, fragile materials, and high SBSE device prices, to expand the range of selectivity, The effect of large specific surface and increased enrichment factor

Inactive Publication Date: 2012-03-07
TIANJIN CHUNFA BIO TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Commercialized SBSE devices use glass rods as the carrier, the material is fragile, and there is only PDMS as a stationary phas

Method used

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  • Stirring extraction bar with composite carbon nanofiber coating and preparation method thereof
  • Stirring extraction bar with composite carbon nanofiber coating and preparation method thereof
  • Stirring extraction bar with composite carbon nanofiber coating and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0029] Example 1 Preparation method of polydimethylsiloxane composite nano carbon fiber coating stirring rod

[0030] Choose a glass tube with a length of 20mm and a diameter of 3mm, and use an alcohol blowtorch to seal the shorter iron core in it, and apply CH to the surface of the rod in turn 2 Cl 2 Treat for 30 minutes, 1mol / L NaOH solution for 8 hours, 0.1mol / L HCl solution for 4 hours, and finally rinse with deionized water to neutrality, and dry at 150°C under nitrogen flow.

[0031] Take 400mg of hydroxy-terminated polydimethylsiloxane diluted with 600μl of dichloromethane, add 100mg of nano carbon fiber, 100mg of hydrogen-containing silicone oil, 100μl of methyltrimethoxysilane and 100μl of trifluoroacetic acid, stir well, and remove the treated The rod is placed in the sol for 30 minutes and taken out, and gelled at room temperature for 12 hours; under the protection of nitrogen, the temperature is programmed to be aged at 120°C for 3 hours, 180°C for 3 hours, and 240°C for...

Example Embodiment

[0032] Example 2 A preparation method of polydimethylsiloxane composite nano carbon fiber coating stirring rod

[0033] Choose a glass tube with a length of 20mm and a diameter of 3mm, and use an alcohol blowtorch to seal the shorter iron core in it, and apply CH to the surface of the rod in turn 2 Cl 2 Treat for 50 minutes, 1mol / L NaOH solution for 6 hours, 0.1mol / L HCl solution for 4 hours, finally rinse with deionized water to neutrality, and dry at 150°C under nitrogen flow.

[0034] Take 400mg of hydroxy-terminated polydimethylsiloxane diluted with 600μl of dichloromethane, add 120mg of carbon nanofiber, 100mg of hydrogen-containing silicone oil, 50μl of glycidoxypropyltrimethylsilane, 50μl of tetraethoxysilane and 100μl Trifluoroacetic acid, stir well to make a sol, put the treated rod in the sol for 30min, take it out, gel at room temperature for 12 hours; under nitrogen protection, carry out temperature-programmed aging at 120℃ for 3h, and 180℃ for 3h 3h, and then kept at 2...

Example Embodiment

[0035] Example 3 Preparation method of polydimethylsiloxane composite nano carbon fiber coating stirring rod

[0036] Choose a glass tube with a length of 20mm and a diameter of 3mm, and use an alcohol blowtorch to seal the shorter iron core in it, and apply CH to the surface of the rod in turn 2 Cl 2 Treat for 30 minutes, 1mol / L NaOH solution for 6 hours, 0.1mol / L HCl solution for 4 hours, and finally rinse with deionized water to neutrality, and dry at 150°C under nitrogen flow.

[0037] Take 400mg of hydroxy-terminated polydimethylsiloxane diluted with 600μl of dichloromethane, add 160mg of carbon nanofibers, 120mg of hydrogen-containing silicone oil, 90μl of methyltrimethoxysilane and 110μl of trifluoroacetic acid, stir well, and remove the treated The rod is placed in the sol for 40 minutes and taken out, and gelled at room temperature for 12 hours; under the protection of nitrogen, the temperature is programmed to be aged at 120°C for 3 hours, 180°C for 3 hours, and 240°C for ...

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Abstract

The invention relates to a stirring extraction bar with a composite carbon nanofiber coating and a preparation method thereof. The stirring extraction bar with a composite carbon nanofiber coating is characterized in that a bar body of the stir extraction bar with a composite carbon nanofiber coating is prepared from a glass tube and an iron core which is shorter than the glass tube and is enclosed in the glass tube; and the surface of the bar body is coated with a coating, wherein the coating comprises carbon nanofibers and polydimethylsiloxane composite with the carbon nanofibers. Through utilization of adsorption characteristics of polydimethylsiloxane and carbon nanofibers, the stir extraction bar with a composite carbon nanofiber coating overcomes the defects of poor adsorption effects produced by a single material, and enlarges the scope of coating selectivity on adsorbates.

Description

technical field [0001] The invention belongs to the field of trace analysis of volatile and semi-volatile organic substances, in particular to the field of trace analysis of volatile and semi-volatile organic substances in food, environment and biological samples, in particular to a composite nano-carbon fiber coating stirring extraction Rods and methods for their preparation. Background technique [0002] Solid Phase Micro Extraction (Solid Phase Micro Extraction, SPME) is a novel sample pretreatment and enrichment technology emerging in the 1990s. It was first carried out in 1989 by the research group of Professor Pawliszyn of the University of Waterloo, Canada. It is developed and researched and belongs to the non-solvent selective extraction method. It can be used for the analysis of almost all kinds of volatile or semi-volatile substances in gas, liquid, biological, solid and other samples. The biggest feature of SPME is that it integrates sampling, extraction, enrich...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/32B01D15/08
Inventor 邓莉戴永鑫邢海鹏邢福深
Owner TIANJIN CHUNFA BIO TECH GRP
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