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2,4-dinitrophenol surface molecular imprinting polymer and preparing method and application thereof

A technology of surface molecular imprinting and dinitrophenol, which is applied in separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of complex preparation process, cumbersome post-treatment of polymers, and restrictions on the application of molecularly imprinted polymer materials.

Active Publication Date: 2017-01-04
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the current molecularly imprinted polymers are prepared in highly toxic organic solvents, not only the preparation process is complicated, the reaction cycle is long, and the post-treatment of the obtained polymers is relatively cumbersome, which restricts the application of molecularly imprinted polymer materials in the environmental field to a certain extent. Applications

Method used

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  • 2,4-dinitrophenol surface molecular imprinting polymer and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] With 20mL absolute ethanol as solvent, 0.2g activated silica gel as carrier, 0.037g 2,4-dinitrophenol as template molecule, 3-aminopropyltriethoxysilane as functional monomer, tetraethylorthosilicate As a cross-linking agent (the molar ratio of 2,4-dinitrophenol, 3-aminopropyltriethoxysilane and tetraethylorthosilicate is 1:2:10), 0.5mL glacial acetic acid (1mol / L) as the initiator, shaking in a water bath at 30°C for 9 hours, and extracting the obtained product with a mixed solution of methanol / acetic acid with a volume ratio of 9 / 1 for 48 hours, then washing with methanol and drying in vacuo at 60°C to obtain Molecularly imprinted polymers on the surface of 2,4-dinitrophenol.

Embodiment 2

[0020] With 20mL absolute ethanol as solvent, 0.2g activated silica gel as carrier, 0.037g 2,4-dinitrophenol as template molecule, 3-aminopropyltriethoxysilane as functional monomer, tetraethylorthosilicate As a crosslinking agent (the molar ratio of 2,4-dinitrophenol, 3-aminopropyltriethoxysilane and tetraethylorthosilicate is 1:6:20), 0.5mL glacial acetic acid (1mol / L) as the initiator, shake in a water bath at 30°C for 30h, shake and elute the obtained product with a mixed solution of methanol / acetic acid with a volume ratio of 9 / 1 for 5 times (1h / time), and wash with methanol Vacuum-dried at 60°C to obtain 2,4-dinitrophenol surface molecularly imprinted polymer.

Embodiment 3

[0022] With 20mL absolute ethanol as solvent, 0.2g activated silica gel as carrier, 0.037g 2,4-dinitrophenol as template molecule, 3-aminopropyltriethoxysilane as functional monomer, tetraethylorthosilicate As a crosslinking agent (the molar ratio of 2,4-dinitrophenol, 3-aminopropyltriethoxysilane and tetraethylorthosilicate is 1:12:35), 0.5mL glacial acetic acid (1mol / L) as the initiator, shaking in a water bath at 30°C for 16 hours, and extracting the obtained product with a mixed solution of methanol / acetic acid with a volume ratio of 9 / 1 for 48 hours, then washing with methanol and drying in vacuo at 60°C to obtain Molecularly imprinted polymers on the surface of 2,4-dinitrophenol.

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Abstract

The invention discloses a 2,4-dinitrophenol surface molecular imprinting polymer and a preparing method and application thereof. According to the key point of the technical scheme, activated silica is used as a carrier, absolute ethyl alcohol is used as solvent, 2,4-dinitrophenol is used as template molecule, 3-aminopropyl triethoxy silane is used as a functional monomer, tetraethoxysilane is used as a cross-linking agent, glacial acetic acid is used as an initiator, the substances are vibrated in a water bath at the temperature of 30 DEG C to trigger polymerization for 9-30 h, template molecules are eluted, or Soxhlet extraction is carried out on the template molecules, and the target product 2,4-dinitrophenol surface molecular imprinting polymer is obtained through methyl alcohol washing and vacuum drying at the temperature of 60 DEG C. The prepared 2,4-dinitrophenol surface molecular imprinting polymer is uniform in particle size, good in mechanical performance, high in selective adsorbability, large in adsorption capacity, easy to regenerate and recycle and capable of being used in high-selectivity separation and enrichment pretreatment of 2,4-dinitrophenol and 2,4,6-trinitrophenol.

Description

technical field [0001] The invention belongs to the technical field of adsorbents for 2,4-dinitrophenol in the environment, and specifically relates to a 2,4-dinitrophenol surface molecularly imprinted polymer and its preparation method and application. Background technique [0002] Nitrophenol is an important and commonly used chemical raw material. It is widely used as a raw material or intermediate in the production of explosives, medicines, pesticides, dyes, wood preservatives and rubber, resulting in nitrophenol-containing A large amount of industrial wastewater is discharged. Phenolic compounds are cytotoxic substances, which are not only difficult to biodegrade, but also can chemically react with the proteins in the cell protoplasm to form denatured proteins, making the cells lose their activity and causing great toxicity. Although low-concentration phenols do not cause obvious local damage in a short period of time, they have strong penetrating power and can cause m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/26C08J9/26B01J20/26B01J20/30B01D15/38
CPCB01D15/3852B01J20/268C08G77/26C08J9/26C08J2201/0424C08J2383/08
Inventor 朱桂芬于文娜王培云张霞茹祥莉程国浩赵轩樊静
Owner HENAN NORMAL UNIV
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