Method for preparing magnetic/core-shell molecularly imprinted adsorbent by miniemulsion polymerization

A technology of miniemulsion polymerization and molecular imprinting, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of poor selectivity and lack of specific recognition ability, and achieve good magnetic response properties, not easy to magnetic leakage, and fast separation effect

Inactive Publication Date: 2016-12-07
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this kind of polymer adsorbent has poor selectivity and does not have specific recognition ability. Therefore, achieving high selectivity adsorption is one of the difficulties in the production process of adsorbents.

Method used

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  • Method for preparing magnetic/core-shell molecularly imprinted adsorbent by miniemulsion polymerization
  • Method for preparing magnetic/core-shell molecularly imprinted adsorbent by miniemulsion polymerization
  • Method for preparing magnetic/core-shell molecularly imprinted adsorbent by miniemulsion polymerization

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Embodiment 1

[0043] 1. A method for preparing a magnetic / core-shell molecularly imprinted adsorbent by miniemulsion polymerization, the preparation method of which is carried out according to the following steps:

[0044] (1) Co-precipitation method to synthesize oleic acid-modified Fe3O4 magnetic nanoparticles

[0045] ferric chloride hexahydrate (FeCl 3 •6H 2 O) dissolved in deionized water, and stirred under ultrasonic conditions (power 200W) for 10 minutes to obtain a stable suspension A, in which FeCl 3 •6H 2 The ratio of O to deionized water was 4.6:170 (g / mL). Ferrous chloride tetrahydrate (FeCl 2 • 4H 2 O) vigorous stirring at 800 rpm and nitrogen (N 2 ) under the protection of dissolved in the above-mentioned suspension A to form suspension B, wherein the control FeCl 2 • 4H 2 The ratio of O to suspension A was 1.6:170 (g / mL). After the temperature rises to 80°C, ammonia water (NH 3 •H 2 O) (25%) was quickly added to the above suspension B under strong stirring at 800 r...

Embodiment 2

[0064] The method for preparing a magnetic / core-shell molecular imprinted adsorbent by miniemulsion polymerization is carried out in the following steps:

[0065] (1) Co-precipitation method to synthesize oleic acid-modified Fe3O4 magnetic nanoparticles

[0066] ferric chloride hexahydrate (FeCl 3 ·6H 2 O) dissolved in deionized water, and stirred under ultrasonic conditions (power 200W) for 10 minutes to obtain a stable suspension A, in which FeCl 3 ·6H 2 The ratio of O to deionized water was 4.8:190 (g / mL). Ferrous chloride tetrahydrate (FeCl 2 4H 2 O) vigorous stirring at 800 rpm and nitrogen (N 2 ) under the protection of dissolved in the above-mentioned suspension A to form suspension B, wherein the control FeCl 2 4H 2The ratio of O to suspension A was 1.8:190 (g / mL). After the temperature rises to 80°C, ammonia water (NH 3 ·H 2 O) (25%) was quickly added to the above suspension B under strong stirring at 800 rpm to form a dark brown magnetic fluid C, in which ...

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Abstract

The invention relates to a method for preparing a magnetic / core-shell molecularly imprinted adsorbent by miniemulsion polymerization, and belongs to the technical field of preparation of environmental functional materials. Specifically refers to styrene and methacrylic acid as monomers, 2,4,6-trichlorophenol (2,4,6-TCP) as template molecule, divinylbenzene as cross-linking agent, dodecane Sodium sulfate was used as emulsifier, potassium persulfate was used as initiator, Bacillus subtilis was introduced as template, and the magnetic / core-shell molecularly imprinted adsorbent was prepared by miniemulsion polymerization. The adsorbent can be applied to selectively adsorb 2,4,6-trichlorophenol in aqueous environment. Static adsorption experiments are used to study the adsorption equilibrium and thermodynamic properties of adsorbents. The results show that the magnetic / core-shell molecular imprinted adsorbent obtained by the present invention has better selective adsorption capacity.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmental functional materials, and relates to a method for preparing a magnetic / core-shell molecularly imprinted adsorbent, in particular to a method for preparing a molecularly imprinted adsorbent by using a miniemulsion polymerization method, which is applied to selective adsorption and separation 2,4,6-Trichlorophenol in aqueous environment. Background technique [0002] With the strengthening of human industrial and agricultural activities, a large number of toxic and harmful organic chemical pollutants have entered the soil-groundwater system, causing a series of environmental problems, among which the serious pollution of surface water and groundwater is more prominent; among these pollutants, Although the widespread use of herbicides, insecticides, and fungicides has played a huge role in increasing food production, the accumulation of pesticide pollutants in crops and other pla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00C08F212/08C08F212/36C08F220/06C08J9/26B01J20/26B01J20/30
Inventor 于萍闫永胜孙启隆于涛潘建明戴江栋
Owner JIANGSU UNIV
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