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Preparation methods of pentachlorophenol molecularly imprinted polymer microspheres and solid phase extraction column thereof

A technology of molecular imprinting and pentachlorophenol, applied in alkali metal compounds, chemical instruments and methods, ion exchange, etc., can solve the problems of poor adsorption selectivity, complicated preparation process, slow adsorption speed, etc., and achieve large specific surface area and pore volume , high adsorption selectivity, and convenient operation

Inactive Publication Date: 2014-04-16
SHENZHEN ENTRY EXIT INSPECTION & QUARANTINE BUREAU INDAL PROD INSPECTION TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems include that the related preparation process is relatively complicated, a variety of reagents need to be added, the adsorption selectivity is poor, and the adsorption speed is slow.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: A pentachlorophenol molecularly imprinted polymer microsphere is prepared by the following steps: (1) dissolving the template molecule pentachlorophenol and the functional monomer in a molar ratio of 1.5:1 to 2:1 to no Prepare a mixed solution in less than 50ml of acetonitrile solution containing 10-20mmol crosslinking agent and catalytic initiator, wherein the functional monomers include methacrylic acid, acrylamide, 2-acrylamide-2-methyl-1- Propanesulfonic acid, N-acryloylalanine, 4-vinylstyrene, cross-linking agent is N, N'-methylenebisacrylamide, ethylene glycol dimethacrylate, initiator is azobis Isobutyronitrile, potassium persulfate; (2) After sealing the mixed solution, a polymerization reaction occurs under the condition of heating and stirring to form a white powdery polymer, the polymerization temperature is 55-70°C, and the reaction time is 12-24h; (3) Use the mixed solution of methanol and acetic acid as the extraction solution to extract the ...

Embodiment 2

[0012] Example 2: A pentachlorophenol molecularly imprinted polymer microsphere solid-phase extraction column is prepared by the following steps: weighing pentachlorophenol molecularly imprinted polymer microspheres, filling in a polypropylene solid-phase extraction column, packing The top and bottom ends of the sieve were respectively equipped with polyethylene sieve plates; methanol: isopropanol volume ratio = 2: 1 was used as the column homogenate liquid, and the homogenate liquid was loaded into the polypropylene solid-phase extraction small column under vacuum. Finally, tightly cover the sieve plate to obtain the pentachlorophenol molecularly imprinted solid-phase extraction column.

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Abstract

The invention provides a preparation method of pentachlorophenol molecularly imprinted polymer microspheres, which comprises the following steps: (1) dissolving template molecules of pentachlorophenol and functional monomers with a molar ratio of 1.5:1-2:1 in an acetonitrile solution containing a cross-linking agent and an initiator to prepare a mixed solution; (2) sealing the mixed solution, performing a polymerization reaction under a heating stirring condition to generate white powdery polymer; (3) extracting the synthesized white powdery polymer by using a mixed solution of methanol and acetic acid as an extraction liquid, removing the template molecules, continuing to extract with pure methanol to remove acetic acid molecules; (4) when extraction is finished, putting the polymer in a vacuum drying box, drying to reach a constant weight, crushing and sieving to obtain pentachlorophenol molecularly imprinted polymer microspheres. Meanwhile, the invention also discloses a preparation method of a solid phase extraction column of the pentachlorophenol molecularly imprinted polymer microspheres. The advantages of the methods of the invention are simple preparation process, high adsorption selectivity, and rapid adsorption speed.

Description

technical field [0001] The invention belongs to the technical field of pollutant adsorption material synthesis in environmental analysis, and in particular relates to a preparation method of pentachlorophenol molecularly imprinted polymer microspheres and a solid-phase extraction column thereof. [0002] Background technique [0003] Molecular imprinting technology refers to the technology of using specific molecules as templates to prepare materials with special recognition functions and high selectivity for the molecules. This technology has developed extremely rapidly in recent years. By using a molecule with a specific shape and size that needs to be recognized as a template molecule, dissolving the template molecule in a cross-linking agent, and then adding a specific functional monomer to initiate polymerization, a highly cross-linked polymer is formed. Embed template molecules that interact with functional monomers. Then, the template molecule is eluted by physic...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08F2/44B01J20/285B01J20/28B01D15/08
Inventor 宋保靓李彬刘志红冯均利余淑媛任聪张珠福陈麒宇邹春海
Owner SHENZHEN ENTRY EXIT INSPECTION & QUARANTINE BUREAU INDAL PROD INSPECTION TECH CENT
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