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Preparation method and application of phenol molecular imprinting doped membrane

A molecular imprinting, phenol technology, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve the problems of efficient selective separation, inability to selectively separate, unable to single, etc., to achieve high membrane flux, superior phenol The effect of molecular recognition performance

Inactive Publication Date: 2015-07-22
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Previous traditional separation methods (catalytic degradation, extraction, distillation, adsorption, etc.) were difficult to separate phenol from salicylic acid; membrane separation technology (Membrane Separation Technique , MST) has been widely used in the separation process due to its advantages of easy operation, high efficiency and energy saving, and environmental friendliness. Single and efficient selective separation of substances, especially for organic compounds with similar structures; molecular imprinting technology (MIT) is a specific recognition developed by imitating the "antigen-antibody" recognition principle in immunology theory The technology of target molecules can achieve the selective separation of certain substances. Molecular Imprinted Membrane (MIM) is an emerging technology that combines the advantages of molecular imprinting technology and membrane separation technology. One of the research hotspots in the field of technology, molecularly imprinted membranes have the advantages of simple fabrication process, small diffusion resistance, and easy application, and provide a feasible and effective solution for separating specific target molecules from their structural analogues.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Add 0.1 mL of phenol and 1.0 g of dodecyltrimethylammonium bromide into a conical flask filled with 20 mL of deionized water, and ultrasonically disperse until completely dissolved.

[0047] (2) Add 0.72 mL of tetravinylpyridine, 0.8 mL of divinylbenzene, and 2.3 mL of methanol to 2.0 mL of styrene, and add the mixture dropwise to the aqueous solution of step (1) within 2.0 h.

[0048](3) Add 0.04 g of potassium persulfate to the mixed solution in step (2), and then pass nitrogen for 5.0 min, 70 o C water bath shaking for 3.0 h.

[0049] (4) After the reaction, the imprinted polymer was suction-filtered, washed with methanol until the filtrate was clear, and dried to obtain tetravinylpyridine imprinted polymer nanoparticles (nano-4-VP-MIPs). Take 0.04 g tetravinylpyridine imprinted polymer nanoparticles The polymer nanoparticles were dissolved in 2.0 mL of ethanol solution to obtain nano-ethanol solution of tetravinylpyridine imprinted polymer.

[0050] (5) Take 0...

Embodiment 2

[0061] (1) Add 0.1 mL of phenol and 1.0 g of dodecyltrimethylammonium bromide into a conical flask filled with 20 mL of deionized water, and ultrasonically disperse until completely dissolved.

[0062] (2) Add 0.72 mL of tetravinylpyridine, 0.8 mL of divinylbenzene, and 2.3 mL of methanol to 2.0 mL of styrene, and add the mixture dropwise to the aqueous solution of step (1) within 2.0 h.

[0063] (3) Add 0.04 g of potassium persulfate to the mixed solution in step (2), and then pass nitrogen for 5.0 min, 70 o C water bath shaking for 3.0 h.

[0064] (4) After the reaction, the imprinted polymer was suction-filtered, washed with methanol until the filtrate was clear, and dried to obtain tetravinylpyridine imprinted polymer nanoparticles (nano-4-VP-MIPs). Take 0.04 g tetravinylpyridine imprinted polymer nanoparticles The polymer nanoparticles were dissolved in 2.0 mL of ethanol solution to obtain nano-ethanol solution of tetravinylpyridine imprinted polymer.

[0065] (5) Take ...

Embodiment 3

[0076] (1) Add 0.1 mL of phenol and 1.0 g of dodecyltrimethylammonium bromide into a conical flask filled with 20 mL of deionized water, and ultrasonically disperse until completely dissolved.

[0077] (2) Add 0.72 mL of tetravinylpyridine, 0.8 mL of divinylbenzene, and 2.3 mL of methanol to 2.0 mL of styrene, and add the mixture dropwise to the aqueous solution of step (1) within 2.0 h.

[0078] (3) Add 0.04 g of potassium persulfate to the mixed solution in step (2), and then pass nitrogen for 5.0 min, 70 o C water bath shaking for 3.0 h.

[0079] (4) After the reaction, the imprinted polymer was suction-filtered, washed with methanol until the filtrate was clear, and dried to obtain tetravinylpyridine imprinted polymer nanoparticles (nano-4-VP-MIPs). Take 0.04 g tetravinylpyridine imprinted polymer nanoparticles The polymer nanoparticles were dissolved in 2.0 mL of ethanol solution to obtain nano-ethanol solution of tetravinylpyridine imprinted polymer.

[0080] (5) Take ...

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Abstract

The invention relates to a preparation method of a molecular imprinting doped membrane, in particular to a preparation method of a phenol molecular imprinting doped membrane. According to the preparation method, by taking a styrene acrylonitrile copolymer (SAN) as a matrix, and a tertvinyl pyridine nano imprinting polymer (nano-4-VP-MIPs) as a functional additive, an imprinting doped membrane which has special recognition characteristics for phenol molecules can be synthesized, and the imprinting doped membrane can be applied to selective recognition and separation of phenol in a solution, and is relatively high in adsorption property and selectivity on phenol molecules.

Description

technical field [0001] The invention relates to a method for preparing a molecularly imprinted doped film, in particular to a method for preparing a phenol molecularly imprinted doped film, and its application to removing impurity phenol from a salicylic acid solution, belonging to the technical field of material preparation and separation. Background technique [0002] Salicylic acid, also known as o-hydroxybenzoic acid, is an important raw material for fine chemicals. Salicylic acid and its derivatives have various pharmacological activities such as sterilization, anti-corrosion, anti-inflammation, and anti-rheumatism. They are widely used in the field of medicine and food It is an important intermediate in industries such as dyes, spices, etc.; however, it has recently been found that the production process of salicylic acid is often accompanied by a variety of impurities with similar structures, among which phenol is more common, and phenol can enter the human body throug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/36C08J9/28C08J5/18C08L25/12C08L25/04C08F212/08C08F212/36C08F226/06B01J20/26B01J20/28B01D71/42B01D15/34
Inventor 闫永胜孙风权孟敏佳何志辉吴易霖
Owner JIANGSU UNIV
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