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Reduced-graphene-oxide-doped electrospining-enhanced nanofiber material and preparation method and application thereof

A nanofiber and graphene technology, applied in the manufacture of conductive/antistatic filaments, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of low cost and achieve high exposure rate, large specific surface area and good repeatability Effect

Inactive Publication Date: 2019-12-10
CHANGSHA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although my country included malachite green in the "List of Veterinary Drugs and Their Compounds Prohibited in Food Animals" before 2002, they may still be illegal due to their low cost and effectiveness in preventing and treating certain fish infections. used as veterinary medicine

Method used

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  • Reduced-graphene-oxide-doped electrospining-enhanced nanofiber material and preparation method and application thereof
  • Reduced-graphene-oxide-doped electrospining-enhanced nanofiber material and preparation method and application thereof
  • Reduced-graphene-oxide-doped electrospining-enhanced nanofiber material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A graphene-doped electrospinning reinforced nanofiber material of the present invention uses polyacrylonitrile-maleic anhydride copolymer (PANCMA) as a matrix, and reduced graphene oxide (rGO) is doped on the matrix.

[0043] Its preparation method comprises the following steps:

[0044] 1. Synthesis of PANCMA copolymer

[0045] Weigh 0.07660gNa 2 SO 3 And 7.4074g maleic anhydride, join in the there-necked flask, measure the acrylonitrile of 13.15mL (ρ=0.8060g / L) in addition, 20mL deionized water are poured in the flask, adjust solution pH to 2.0 with dilute sulfuric acid, in nitrogen After heating to 60°C under protection, add 0.1360gK 2 S 2 o 8 , reacted for 3 hours, took out the white polymer, rinsed it with water and ethanol several times, filtered it, and dried it in a vacuum oven (60°C) for 12 hours to obtain the PANCMA polymer. The reaction process is shown in figure 1 shown.

[0046] 2. Synthesis of graphene oxide

[0047] In this experiment, graphene ox...

Embodiment 2

[0070] Using the reduced graphene oxide doped electrospinning reinforced nanofiber material obtained in Example 1 to extract and analyze the application of malachite green.

[0071] Take 5L of water from the lower reaches of the Lijiang River in Guilin (Yangshuo), statically deposit large particles of impurities, and then pass through a 0.45 μm filter membrane. Take 50 mL of environmental water sample, add 50 μL of MG with a concentration of 10 μg / mL, immerse the prepared PANCMA-rGO electrospun nanofibers into the above mixture, and use a peristaltic pump to pass through the material at a flow rate of 1.5 mL / min, extract and Enrichment of MG present in environmental water samples. Take out the fully adsorbed electrospun fibers and rinse off the physically adsorbed MG with secondary water, squeeze out the excess water, load it into a 0.22um nylon filter head, and use a 10mL syringe to draw 5mL of acetonitrile:formic acid (9:1 , v / v) The eluate was powered by a syringe pump, an...

Embodiment 3

[0073] Using the reduced graphene oxide doped electrospinning reinforced nanofiber material obtained in Example 1 to extract and analyze the application of malachite green.

[0074] Take 5L of water from a farmland in Guilin City, statically deposit large particles of impurities, and then pass through a 0.45μm filter membrane. Take 50 mL of environmental water sample, add 50 μL of MG with a concentration of 10 μg / mL, immerse the prepared PANCMA-rGO electrospun nanofibers into the above mixture, and use a peristaltic pump to pass through the material at a flow rate of 1.5 mL / min, extract and Enrichment of MG present in environmental water samples. Take out the fully adsorbed electrospun fibers and rinse off the physically adsorbed MG with secondary water, squeeze out the excess water, load it into a 0.22um nylon filter head, and use a 10mL syringe to draw 5mL of acetonitrile:formic acid (9:1 , v / v) The eluate was powered by a syringe pump, and the flow rate was controlled to b...

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Abstract

The invention discloses a reduced-graphene-oxide-doped electrospining-enhanced nanofiber material. Polyacrylonitrile-maleic anhydride copolymer is taken as a matrix, and reduced graphene oxide is doped in the matrix. The fiber material is large in specific surface area and high in functional group exposure rate, and is an electrospun nanofiber with high adsorbability, a large adsorption amount, high adsorption and enrichment rates, good stability, high sensitivity and good reproducibility; in addition, the material has good water absorption, and can be combined with target molecules better inan aqueous solution. The invention further provides a preparation method of the fiber material. By regulating and optimizing PANCMA polymer, the GO proportion, the spinning voltage, the receiving distance and the flowing speed, the electrospun nanofiber with higher adsorbability, a larger adsorption amount, higher adsorption and degradation rates and better stability and reproducibility is obtained. The invention further discloses application of the fiber material in MG extraction and analysis, and the fiber material has good MG adsorption and extraction performance.

Description

technical field [0001] The invention belongs to the technical field of extraction and analysis of trace target substances in environmental samples, and in particular relates to a reduced graphene oxide doped electrospinning reinforced nanofiber material and its preparation method and application. Background technique [0002] Malachite green (MG) is a basic dye of three kinds of methane, which is widely used in the dyeing of cotton, leather, silk, paper and other products, and has the potential "three effects". Although my country included malachite green in the "List of Veterinary Drugs and Their Compounds Prohibited in Food Animals" before 2002, they may still be illegal due to their low cost and effectiveness in preventing and treating certain fish infections. Used as veterinary medicine. Therefore, it is necessary to establish a set of convenient, fast and efficient separation and extraction methods for MG. [0003] Solid Phase Extraction (Solid Phase Extraction, SPE) i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/54D01F1/09
CPCD01F1/09D01F6/54
Inventor 杜甫佑黄祝君孙灵顺阮贵华
Owner CHANGSHA UNIVERSITY
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