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Preparation and application of novel chromatic fiber IAHF-PAR

A technology of IAHF-PAR and chromogenic fiber, which is applied in the field of functional fiber synthesis, can solve the problems of not being able to meet the rapid detection of large batches of samples, high cost of use, complicated preparation work, etc., and achieve fast adsorption speed, wide source of raw materials, washing The effect of high removal rate

Active Publication Date: 2017-10-10
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these analytical methods can detect the mercury content in the sample more accurately, they have the disadvantages of high cost of use and complicated pre-test preparations, and cannot meet the rapid detection of large-scale samples.

Method used

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  • Preparation and application of novel chromatic fiber IAHF-PAR
  • Preparation and application of novel chromatic fiber IAHF-PAR
  • Preparation and application of novel chromatic fiber IAHF-PAR

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Accurately weigh 0.15g of parent acrylic fiber (PAN) into a 100ml three-necked flask, then add 30ml of reaction solvent toluene, soak and swell for 6h;

[0048] (2) Add the ligand isoniazid to the three-necked flask, turn on nitrogen, and stir for 1-2h at room temperature at a stirring speed of 150 rpm. After the air in the flask is drained (that is, under nitrogen protection), Stir at 100°C until the reaction is over, wherein the molar ratio of acrylic fiber (parent) to isoniazid (ligand) is 1:3;

[0049] (3) After the reaction in step (2) is completed, the resultant of step (2) is washed with the reaction solvent toluene until it is colorless, and then washed with absolute ethanol, acetone, and ether for several times, and vacuumed at 50°C. Dry to constant weight to obtain acrylic chelating fiber IAHF.

[0050] figure 1 Shown is the infrared spectrum of IAHF prepared in Example 1, 2243cm -1 The peak is the absorption peak of the stretching vibration of the cyano CN bon...

Embodiment 2

[0086] Put 0.5g acrylic chelate fiber IAHF, 0.3g PAR, 35mL water and 5mL formaldehyde solution into a 100mL three-necked flask, stir and heat to reflux for 4h under nitrogen protection, stir at 70℃ and the reaction is complete, take out the fiber, and rinse the fiber repeatedly with warm water To neutrality, put it in an oven to dry (50°C) for 2h to obtain color-developing fiber IAHF-PAR. At room temperature, the color-developing fiber IAHF-PAR was placed in a variety of heavy metal ion solutions to observe the color-developing effect. Among them, the heavy metal ion solution includes Cd 2+ , Hg 2+ , Al 3 + , Pb 2+ , Zn 2+ , Cr 3+ .

[0087] Such as Image 6 As shown, the color-developing fiber IAHF-PAR has an effect on 100ppm Cd 2+ , Hg 2+ , Al 3+ , Pb 2+ , Zn 2+ , Cr 3+ Six kinds of heavy metals are used for color development. Compared with the blank tube without adding any metal ions, from Image 6 It can be clearly seen from the experimental results that IAHF-PAR discoloratio...

Embodiment 3

[0104] (1) Preparation of acrylic chelate fiber IAHF: the specific process is the same as the preparation process of IAHF in Example 1.

[0105] (2) Preparation of color-developing fiber IAHF-PAR: the specific process is the same as the preparation process of IAHF-PAR in Example 2.

[0106] (3) Pretreatment of the sample to be tested: Weigh a certain amount of the mashed and homogenized sample and place it in a polytetrafluoroethylene tube, and add a certain amount of 30% H 2 O 2 And HNO 3 , Soak overnight, then put it in the digestion tank, put it in the digestion instrument, set the digestion conditions, where the sample amount, add 30% H 2 O 2 And HNO 3 , The microwave digestion parameters of the set parameter conditions are shown in Table 6 below. After digestion, take out the PTFE tube and place it on a hot plate, heat at 120°C for 2h, drive away the acid until the digestion solution is about 1mL, transfer it to a volumetric flask, dilute the volume to 25mL with deionized water...

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Abstract

The invention discloses a synthesis method of a chelate fiber IAHF and a synthesis method and application of an IAHF-PAR chromatic fiber. The synthesis method of the chelate fiber IAHF comprises the following step: the polyacrylonitrile chelate fiber IAHF is synthesized by taking a polyacrylonitrile fiber as a matrix and isoniazide as a ligand under the condition of a nitrogen protective atmosphere. The synthesis method of the chromatic fiber IAHF-PAR comprises the following steps: putting the polyacrylonitrile chelate fiber IAHF and PAR into a formaldehyde water solution, performing stirring and heating reflux under the condition of a nitrogen protective atmosphere for 2-6 hours, and ending the stirring reaction at 70 DEG C; and performing flushing with warm water, and performing drying to a constant weight to obtain the chromatic fiber IAHF-PAR. The polyacrylonitrile chelate fiber IAHF synthesized by the invention has a heavy metal ion adsorption capability, wherein the selective adsorbability on mercury ions is high, the adsorption capacity is high, and the adsorption rate is high; and the chromatic fiber IAHF-PAR is applicable to detection under different environments, and can be prepared into chromatic materials of different forms.

Description

Technical field [0001] The invention belongs to the technical field of functional fiber synthesis, and specifically relates to a method for synthesizing a chelating fiber (IAHF) with high-efficiency selective adsorption performance and a method and application for the synthesis of IAHF-PAR color-changing fiber. Background technique [0002] The rapid development of science and technology and economy has promoted the process of industrial modernization in our country. While bringing convenient urban life and considerable economic benefits, it also brought serious environmental pollution problems and destroyed the ecological environment on which we depend. The resulting heavy metal pollution has become a severe test in food quality and safety. The production and processing of agricultural products are particularly susceptible to the influence of the external environment, so heavy metal pollution in the environment can easily lead to excessive heavy metals in agricultural products. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30D06M13/355G01N21/78D06M101/28
CPCB01J20/26B01J20/28023D06M13/355D06M2101/28G01N21/78
Inventor 刘福奇蔡晓敏熊春华陈婷朱敏亮吴舒怡
Owner ZHEJIANG GONGSHANG UNIVERSITY
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