Preparation method for metal wire solid-phase micro-extraction fiber of noble metal nanometer material-ionic liquid composite functional coating

A technology of ionic liquids and nanomaterials, applied in the field of solid-phase microextraction fibers, can solve problems such as the fixation of difficult and precious metal nanomaterials, and achieve the effects of enhancing extraction performance, improving stability, and improving mechanical strength

Inactive Publication Date: 2012-06-13
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commonly used physical coating method and sol-gel method are difficult to firmly fix noble metal nanomaterials on the wire support.

Method used

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  • Preparation method for metal wire solid-phase micro-extraction fiber of noble metal nanometer material-ionic liquid composite functional coating
  • Preparation method for metal wire solid-phase micro-extraction fiber of noble metal nanometer material-ionic liquid composite functional coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Preparation of gold nanoparticle-imidazole-based ionic liquid composite extraction coating metal wire solid phase microextraction fiber

[0024] It includes the following three steps: A, B, and C:

[0025] A. Preparation of disulfhydryl ionic liquid

[0026] 0.100mol imidazole was mixed with 0.200mol 3-bromopropanethiol, protected by nitrogen, stirred at 80 degrees Celsius for 48 hours, acetone was recrystallized twice to obtain imidazolyl bromide ionic liquid with two mercapto groups; 0.050mol imidazolyl Bromide ionic liquid with 0.060mol NH 4 PF 6 The aqueous solution is mixed, stirred at room temperature for 24 hours, and the precipitate is dried and recrystallized twice with acetone to obtain a high-temperature resistant imidazole-based hexafluorophosphate ionic liquid.

[0027] B. Surface pretreatment of stainless steel wire

[0028] First, polish the surface of one end of the stainless steel wire with fine sandpaper, then ultrasonically clean with water and etha...

Embodiment 2

[0031] Example 2: Preparation of silver nanoparticle-imidazole-based ionic liquid composite extraction coating metal wire solid phase microextraction fiber

[0032] It includes the following three steps: A, B, and C:

[0033] A. Preparation of disulfhydryl ionic liquid

[0034] 0.100mol 1-methyl-2-mercaptoimidazole and 0.120mol 4-bromobutanethiol were dissolved in 20ml ethanol, protected by nitrogen, and stirred for 48 hours at 60 degrees Celsius. The solvent was evaporated to dryness, and acetone was recrystallized twice to obtain Imidazolyl bromide ionic liquid with two mercapto groups; 0.050mol imidazolyl bromide ionic liquid and 0.060mol NH 4 PF 6 The aqueous solution is mixed, stirred at room temperature for 24 hours, and the precipitate is dried and recrystallized twice with acetone to obtain a high-temperature resistant imidazole-based hexafluorophosphate ionic liquid.

[0035] B. Surface pretreatment of stainless steel wire

[0036] First, polish the surface of one end of the s...

Embodiment 3

[0039] Example 3: Preparation of copper nanoparticle-imidazole-based ionic liquid composite extraction coating metal wire solid phase micro extraction fiber

[0040] It includes the following three steps: A, B, and C:

[0041] A. Preparation of disulfhydryl ionic liquid

[0042] 0.100mol of imidazole and 0.200mol of 4-bromobutanethiol were dissolved in 25ml of ethanol, protected by nitrogen, and stirred for 48 hours at 80 degrees Celsius. The solvent was evaporated and recrystallized twice with acetone to obtain imidazolyl bromide with two mercapto groups. Salt ionic liquid; 0.060mol imidazole bromide salt ionic liquid and 0.070mol (CF 3 SO 2 ) 2 The NLi aqueous solution was mixed, stirred at room temperature for 24 hours, and the precipitate was dried and recrystallized twice with acetone to obtain a high-temperature resistant imidazolyl hexafluorosulfonamide salt ionic liquid.

[0043] B. Surface pretreatment of stainless steel wire

[0044] First, polish the surface of one end of th...

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Abstract

The invention discloses a method for preparing a solid-phase micro-extraction fiber of a noble metal nanometer material-ionic liquid composite functional coating on a metal wire carrier and particularly relates to a method in which ionic liquid is used as a bridge chain for the layer-by-layer self-assembly of noble metal nanoparticles on the metal wire carrier. The method is characterized by comprising the following steps of: selecting a metal wire as a carrier, adopting a layer-by-layer self-assembly method to modify ionic liquid with sulfhydryl groups to serve as the bridge chain, and assembling the noble metal nanoparticles on the metal wire layer by layer, thereby obtaining the novel solid-phase micro-extraction fiber of the noble metal nanometer material-ionic liquid composite functional coating. The solid-phase micro-extraction fiber prepared by the method has the characteristics of high mechanical strength, firm extracted coating, high adsorption capacity, long service life and the like, can be used for enriching and analyzing trace components in samples of foods, environments, medicines, biochemistry and the like and has very good application potential.

Description

Technical field [0001] The invention relates to a technique for preparing a solid phase micro-extraction fiber of a precious metal nano material-ionic liquid composite functional coating on a stainless steel wire carrier. Background technique [0002] Solid phase microextraction is a new type of high-efficiency and rapid separation technology developed in the 1990s. It has the advantages of low cost, strong enrichment capacity, fast analysis speed, simple operation and convenient on-site analysis and instrument combination. It is widely used in the enrichment analysis of trace components in food, environmental, pharmaceutical and biochemical samples. The core of this technology is the preparation of solid-phase micro-extraction fibers. The solid-phase micro-extraction fibers with excellent extraction performance and durability depend on the carrier and extraction coating. Quartz fiber is a common carrier for preparing solid-phase micro-extraction fiber. Quartz has poor mechanica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/32
Inventor 孙敏罗川南
Owner UNIV OF JINAN
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