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Preparation method of magnetic molecularly imprinted material

A magnetic molecular imprinting and magnetic technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc. problem, to achieve the effect of good selectivity, high selection and recognition ability, and easy operation

Inactive Publication Date: 2017-09-26
CHINA AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, relevant research work has reported that using magnetic nano-ferric iron tetroxide as the carrier, bisphenol A, diethylstilbestrol, estradiol and other exogenous chemical substances that can affect the human body as template molecules, the prepared Materials that can achieve fast and effective solid-liquid separation, but the preparation process is relatively complicated, and magnetic nanoparticles (Fe) coated with silica 3 o 4 @SiO 2 ) as a carrier is still relatively little, especially for the separation technology of carcinogenic aromatic amines in textiles, and molecular imprinting technology has not yet been well applied.

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  • Preparation method of magnetic molecularly imprinted material
  • Preparation method of magnetic molecularly imprinted material
  • Preparation method of magnetic molecularly imprinted material

Examples

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Embodiment 1

[0035] The preparation method of the magnetic molecular imprinting material for the rapid enrichment and separation of carcinogenic aromatic amines in textiles according to the present invention, taking 4,4'-diaminodiphenylmethane as an example

[0036] The synthesis schematic diagram of the magnetic molecular imprinting material for the rapid enrichment and separation of carcinogenic aromatic amines in textiles provided by the present invention is as follows figure 2 As shown, its specific preparation method can be divided into the following four steps:

[0037] First, Fe was prepared by a solvothermal method 3 o 4 Nanoparticles: 2.7g FeCl 3 ·6H 2 O and 7.2g NaAc were dissolved in 100ml of ethylene glycol, and stirred vigorously until a uniform yellow solution was formed. The solution was transferred to a closed polytetrafluoroethylene-lined autoclave, and reacted at 200°C for 8 hours. After the reaction was completed, the product was naturally cooled to room temperature...

Embodiment 2

[0042] The preparation method of the magnetic molecular imprinting material for the rapid enrichment and separation of carcinogenic aromatic amines in textiles, taking 4,4'-methylene-bis-(2-chloroaniline) as an example

[0043] The specific preparation method can be divided into the following four steps:

[0044] First, Fe was prepared by a solvothermal method 3 o 4 Nanoparticles: 2.7g FeCl 3 ·6H 2 O and 7.2g of NaAc were dissolved in 100ml of ethylene glycol and stirred vigorously until a uniform yellow solution was formed. The solution was transferred to a closed polytetrafluoroethylene-lined autoclave and reacted at 200°C for 8h. After the reaction was completed, the product was naturally cooled to room temperature, separated under the action of an external magnetic field, washed with ethanol repeatedly, and vacuum-dried at 60°C to obtain Fe 3 o 4 Nanoparticles.

[0045] Second, the Fe 3 o 4 The nanoparticles are coated with silica gel to obtain embedded magnetic si...

Embodiment 3

[0049] Structural characterization of the magnetic molecular imprinted material for rapid screening of carcinogenic aromatic amines in textiles

[0050] This example is for structural characterization of the magnetic molecularly imprinted material prepared in Example 2, as follows:

[0051] 1. Fourier transform infrared spectrum

[0052] The magnetic nanoparticles, magnetic silica nanoparticles, vinyl-modified magnetic silica nanoparticles and magnetic molecularly imprinted polymers were characterized by Fourier transform infrared spectrometer, and the samples were prepared by potassium bromide tablet method.

[0053] from figure 2 Fe can be seen in 3 o 4 After the nanoparticles are coated with silica gel, 1450cm -1 Chu peak disappears at 1662cm –1 The characteristic peak that appears at is the bending vibration peak of H-O-H, 1078cm -1 The symmetrical stretching vibration absorption peak of Si-O-Si is at 780cm -1 The weak absorption at is the antisymmetric stretching ...

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Abstract

The invention discloses a preparation method of a magnetic molecularly imprinted material and belongs to the field of chemical analysis and testing. The preparation method comprises the following steps: firstly, preparing magnetic nanoparticles with surfaces covered with silica gel; carrying out modification on the surfaces of the magnetic nanoparticles by utilizing a silica gel modifier; finally, preparing the magnetic molecularly imprinted material by adopting surface imprinting and thermal initiation manners. The magnetic molecularly imprinted material disclosed by the invention has a rapid enrichment and separation speed and good selectivity in analysis and detection on cancer-causing aromatic amine in textiles; the magnetic molecularly imprinted material can be used for specifically recognizing a target compound, has good stability and can be repeatedly used; the cost is relatively low so that the magnetic molecularly imprinted material can be put into industrial production.

Description

Technical field: [0001] The invention belongs to the field of chemical analysis and testing, and relates to a preparation method of a magnetic molecular imprinted material. Background technique: [0002] Azo compounds are the most diverse and widely used synthetic dyes. Studies have shown that many azo compounds have carcinogenic effects. For example, cream yellow used for margarine coloring can induce liver cancer, and methyl red as an indicator can cause cancer. Cause bladder and breast tumors. Aromatic amines in textiles often have false positives in traditional detection methods, which have a great impact on the detection results. [0003] Molecularly imprinted preparation technology (also known as molecularly imprinted) (molecularly imprinting techniques, MIT) refers to the preparation of polymers that match the template molecules in terms of spatial structure and binding sites. Interdisciplinary subjects such as chemistry and materials chemistry. In short, molecular...

Claims

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Application Information

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IPC IPC(8): C08F226/06C08F222/14C08F2/44C08K9/06C08K9/12C08K3/22C08K3/36B01J20/28B01J20/26B01J20/30
CPCB01J20/06B01J20/268B01J20/28009C08F2/44C08F226/06C08K3/22C08K3/36C08K9/06C08K9/12C08K2003/2272C08K2003/2275C08K2201/01C08K2201/011C08F222/102
Inventor 孙英于晓璐刘航刁剑雄王寅超李远瞩
Owner CHINA AGRI UNIV
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