Preparation method of magnetic molecularly imprinted polymer for adsorbing methylene blue

A technology of magnetic molecular imprinting and methylene blue, applied in alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of low adsorption capacity, slow adsorption speed, pollution, etc., achieve excellent adsorption capacity, and save business cost, environmental protection effect

Inactive Publication Date: 2020-11-13
LANZHOU JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of continuous development and progress, various difficulties will inevitably be encountered, such as (1) the imprinted polymer prepared by the researchers has a slow adsorption rate and a low adsorption capacity
(2) Inconvenient recycling of imprinted polymers and pollution to the environment, etc.

Method used

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  • Preparation method of magnetic molecularly imprinted polymer for adsorbing methylene blue
  • Preparation method of magnetic molecularly imprinted polymer for adsorbing methylene blue
  • Preparation method of magnetic molecularly imprinted polymer for adsorbing methylene blue

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The preparation method of the magnetic molecularly imprinted polymer in this embodiment comprises the following steps:

[0029] 1) Preparation of magnetic substances: Accurately measure 160mL of ethylene glycol in a conical flask, add 5.4g of FeCl 3 ·6H 2 O, sonicate until dissolved to obtain a yellow transparent liquid, sequentially add 14.4g of anhydrous sodium acetate and 4.0g of polyethylene glycol (2000) into the liquid, stir vigorously for half an hour, place it in a hydrothermal synthesis reactor, and seal the reactor , put it in a drying oven at 200°C for 8 hours, take it out, cool it down to room temperature naturally, pour off the upper oil phase clear liquid, and wash it with ethanol and distilled water for several times until the supernatant liquid is transparent, indicating that the reaction impurities have been removed. It was dried in a vacuum oven at 70°C for 12 hours to obtain black nano-Fe 3 o 4 Particles (such as figure 1 As shown, its particle si...

Embodiment 2

[0037] The preparation method of the magnetic molecularly imprinted polymer in this embodiment comprises the following steps:

[0038] 1) Preparation of magnetic substance: add 162ml ethylene glycol solution in a beaker, mix 5.5g FeCl 3 ·6H 2 O was added to the beaker and dissolved by ultrasonication for 30 min to obtain a yellow transparent oily solution. Add 15 g of anhydrous sodium acetate and 5 g of ground polyethylene glycol (2000) to the above solution, stir magnetically for 1.5 h, and ultrasonically dissolve for 30 min to form a uniform yellow oily emulsion. Add the dissolved emulsion into the hydrothermal synthesis reaction kettle, seal the reaction kettle, then put it in a dry box, react at 200°C for 8 hours, take out the reaction kettle and cool it at room temperature for a period of time, open the reaction kettle to observe Until the black particles gather and settle at the bottom of the reactor. Pour the upper waste liquid into the waste liquid bucket, and use d...

Embodiment 3

[0043] The preparation method of the magnetic molecularly imprinted polymer in this embodiment comprises the following steps:

[0044] 1) Preparation of magnetic substances: Accurately measure 160mL of ethylene glycol in a conical flask, add 5.4g of FeCl 3 ·6H 2 0, stirred until dissolved to obtain a yellow transparent liquid, sequentially added 14.4g sodium acetate and 4.0g polyethylene glycol (2000) into the liquid and placed in a hydrothermal synthesis reactor after vigorously stirring for half an hour, sealed the reactor, and put Put it into a drying oven at 200°C for 8 hours, take it out, cool it down to room temperature naturally, pour off the upper oil phase clear liquid, wash with ethanol and distilled water several times, until the supernatant liquid is transparent, indicating that the reaction impurities have been removed, put it away Dry in a vacuum oven at 70°C for 12 hours to obtain black nano-Fe 3 o 4 Granules for spare.

[0045] 2) Preparation of magnetic mo...

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Abstract

The invention particularly relates to a preparation method of a magnetic molecularly imprinted polymer for adsorbing methylene blue. The preparation method comprises the following steps: 1) adding aniron source into a solvent according to a mass ratio, carrying out ultrasonic treatment to obtain a yellow transparent oily solution, adding a stabilizer, and reacting in a hydrothermal synthesis reaction kettle to obtain ferroferric oxide nanoparticles; 2) mixing template molecules, a monomer, water and a pore-foaming agent, adding a cross-linking agent, an initiator and the magnetic substance prepared in the step 1), performing ultrasonic treatment, sealing, and reacting in a magnetic stirrer to obtain a solid polymer; and grinding the polymer, eluting template molecules and residual organicmatters in the polymer by using an aqueous solution of a template molecule remover and a methanol-acetic acid solution in sequence, filtering, and drying to obtain the magnetic molecularly imprintedpolymer. The product prepared by the method has very important economic and social significance for environmental pollution treatment of dyes.

Description

【Technical field】 [0001] The invention belongs to the technical field of adsorption material preparation, and in particular relates to a preparation method of a magnetic molecularly imprinted polymer for adsorbing methylene blue. 【Background technique】 [0002] Methylene blue (English name: methylene blue, abbreviated as: MB) belongs to water-soluble thiazide azo dyes. It is commonly used in industry for printing, dyeing and coloring of paper, leather, cotton, bamboo, wood, etc. For the dyeing of biological and bacterial tissues, etc., the consumption is large and the wastewater discharged is large. Methylene blue was also used as a drug to treat bacillary dysentery at first, and later it was often used to treat cancer, bacterial and viral infections, and central nervous diseases. In addition, methylene blue is also used in aquaculture to treat certain fish diseases or as a disinfectant. Although methylene blue has a good curative effect in the treatment of methemoglobin, ...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C08F220/06C08F222/38C08F2/44C08K3/22C02F101/30
CPCB01J20/268B01J20/28009B01J20/3057C02F1/288C08F220/06C08F2/44C08K3/22C02F2101/308C02F2303/16C08K2003/2275C08K2201/01C08K2201/011
Inventor 王农曾一文孟红福景继磊
Owner LANZHOU JIAOTONG UNIV
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