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Preparation and application of novel color changing fiber APF-PAR

An APF-PAR, chromogenic fiber technology, applied in the field of chelating fiber synthesis, can solve the problems of high cost and high detection cost, and achieve the effects of reducing detection cost, fast adsorption speed and high yield

Active Publication Date: 2018-01-09
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the routine detection methods for heavy metals in seafood include: precipitation analysis, complexometric titration, spectrophotometry, atomic absorption spectrometry, emission spectrometry, etc., but these methods generally require expensive instruments and have the disadvantages of high detection costs. At the same time, heavy metal detection is a very complicated task. In order to meet the rapid detection requirements of a large number of samples, it is particularly important to find a fast detection method that is easy to carry, low in cost and has certain sensitivity and accuracy.

Method used

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  • Preparation and application of novel color changing fiber APF-PAR
  • Preparation and application of novel color changing fiber APF-PAR
  • Preparation and application of novel color changing fiber APF-PAR

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Accurately weigh 0.15g of parent acrylic fiber (PAN) and place it in a 100ml three-neck bottle, then add 30ml of reaction solvent water, soak and swell for 6h;

[0052] (2) Add ligand 1-(2 aminoethyl) piperidine in the three-necked bottle, and connect nitrogen, stir 1-2h at normal temperature with the stirring speed of 150rpm, after the air in the bottle is exhausted (i.e. Under nitrogen protection conditions), stirred at 90°C until the reaction was completed, wherein the molar ratio of acrylic fiber (matrix) to 1-(2 aminoethyl)piperidine (ligand) was 1:5;

[0053] (3) After the reaction in step (2) is finished, wash the product of step (2) with water until the reaction solvent is colorless, then wash it several times with absolute ethanol, acetone, and ether, and dry it under vacuum at 50°C To constant weight, obtain acrylic fiber chelating fiber APF.

[0054] figure 1 Shown is the infrared spectrogram of the APF prepared by embodiment 1; 2241m-1 peak is the stre...

Embodiment 2

[0095] Put 0.5g of acrylic chelate fiber APF, 0.3g of PAR, 35mL of water and 5mL of formaldehyde solution into a 100mL three-neck flask, stir and heat to reflux for 4 hours under the protection of nitrogen, and complete the reaction at 70°C, take out the fiber, and rinse the fiber repeatedly with warm water To neutral, dry in an oven (50°C) for 2 hours to obtain the color-developing fiber APF-PAR. At room temperature, place the chromogenic fiber APF-PAR in various heavy metal ion solutions to observe the chromogenic effect. Wherein, the heavy metal ion solution includes Pb 2+ , Zn 2+ 、 Cu 2 + 、Ni 2+ , Hg 2+ 、Cd 2+ .

[0096] Such as Figure 7 As shown, the chromogenic fiber APF-PAR pair 10 -2 mol / L of Pb 2+ , Zn 2+ 、Cu 2+ 、Ni 2+ , Hg 2+ 、Cd 2+ Six heavy metals were used for color development, and we can clearly see that under the condition of pH 6, the color development fiber APF-PAR has a positive effect on Cu 2+ , Hg 2+ All have obvious color rendering effec...

Embodiment 3

[0126] (1) Preparation of acrylic chelating fiber APF: the specific process is as in the preparation process of APF in Example 1.

[0127] (2) Preparation of chromogenic fiber APF-PAR: the specific process is as the preparation process of APF-PAR in Example 2.

[0128] (3) Pretreatment of the sample to be tested: Weigh 0.5 g of the mashed and homogenized tuna sample and place it in a polytetrafluoroethylene tube, add 1 mL of 30% H 2 o 2 , 10mL HNO 3 , and then put it into the digestion tank, put it in the digestion instrument, and set the digestion conditions: 800w, 15min; 1000w, 25min; 0w, 15min. After digestion, take out the polytetrafluoroethylene tube and put it on the electric heating plate, heat at 120°C for 2 hours, drain the acid until about 1mL of the digestion solution remains, transfer it into a volumetric flask, and dilute it to 25mL with deionized water for testing.

[0129] (4) Submerge the APF-PAR acrylic fiber prepared by masking in the colorimetric tube com...

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Abstract

The invention discloses synthetic methods and applications of an acrylic chelated fiber APF and a color changing fiber APF-PAR. The synthetic method of the acrylic chelated fiber APF comprises the following step: the acrylic chelated fiber APF is prepared from an acrylic fiber as a parent and 1-(2-aminoethyl) piperidine as a ligand under nitrogen protection. The acrylic chelated fiber APF and PARare placed in an aqueous formaldehyde solution, the mixture is stirred and subjected to heating flux under nitrogen protection for 3-5 h, a stirring reaction ends at 70 DEG C, a product is washed withwarm water and dried to constant weight, and the color developing fiber APF-PAR is obtained. The synthesized acrylic chelated fiber APF has heavy metal ion adsorption capacity, has stronger selectiveadsorption on cupper ions and mercury ions, and is high in adsorption capacity and adsorption speed; the synthesized acrylic color developing fiber APF-PAR has sufficient tensile breaking strength tomeet actual application requirements and is applicable to detection in different environments, and color developing materials in different forms can be prepared from the fiber.

Description

technical field [0001] The invention relates to the field of chelate fiber synthesis, in particular to a synthesis method and application of acrylic chelate fiber APF and discoloration fiber APF-PAR. Background technique [0002] Chelating fibers are a kind of functional polymers that use fibrous polymers as carriers to connect special functional groups to chelate with specific substances to achieve separation. It is a new type of high-performance adsorption developed following ion exchange resins and ion exchange fibers. Material. In recent years, the research on the extraction, separation and analysis of metal ions by chelating fibers has become a research hotspot in the field of separation science. [0003] With the development of modern analytical techniques and analytical instruments (such as ICP-MS, ICP-AES and AAS, etc.), the detection limits of elements have been greatly reduced. For example, using ICP-MS can detect metal ions at the ppm level, but trace In the ana...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/355D06M13/127G01N21/78C02F1/28C02F101/20D06M101/28
Inventor 熊春华蔡晓敏郑宇强胡天晨周昱冉翟滢皓
Owner ZHEJIANG GONGSHANG UNIVERSITY
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