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Method for preparing magnetic/core-shell molecularly imprinted adsorbent employing 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 lack of specific recognition ability and poor selectivity, and achieve low magnetic leakage, good magnetic response properties, and fast separation effect

Inactive Publication Date: 2014-10-01
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 employing miniemulsion polymerization
  • Method for preparing magnetic/core-shell molecularly imprinted adsorbent employing miniemulsion polymerization
  • Method for preparing magnetic/core-shell molecularly imprinted adsorbent employing miniemulsion polymerization

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Embodiment 1

[0046] 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:

[0047] (1) Co-precipitation method to synthesize oleic acid-modified Fe3O4 magnetic nanoparticles

[0048] 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 rpm t...

Embodiment 2

[0067] The method for preparing a magnetic / core-shell molecular imprinted adsorbent by miniemulsion polymerization is carried out in the following steps:

[0068] (1) Co-precipitation method to synthesize oleic acid-modified Fe3O4 magnetic nanoparticles

[0069] 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 employing miniemulsion polymerization, and belongs to the technical field of preparation of an environment function material. Particularly, the magnetic / core-shell molecularly imprinted adsorbent is prepared by adopting styrene and a methacrylic acid as monomers, 2,4,6-trichlorophenol (2,4,6-TCP) as a template molecule, divinyl benzene as a crosslinking agent, lauryl sodium sulfate as an emulsifier, and potassium peroxodisulfate as an initiator, and introducing bacillus subtilis as a template by adopting a miniemulsion polymerization method. The adsorbent can be applied to selective adsorption of the 2,4,6-trichlorophenol in a water environment. The static absorption experiment is used for researching adsorption equilibrium and thermodynamic property of the adsorbent. The result shows that the magnetic / core-shell molecularly imprinted adsorbent obtained by using the method has good selective adsorption ability.

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 Applications(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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