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Method for preparing magnetic molecularly-imprinted adsorbent

A technology of magnetic molecular imprinting and adsorbent, which is applied in the field of environmental protection functional material preparation, can solve the problems of non-reusable raw materials, expensive and difficult to obtain, difficult separation of adsorbent, etc., achieve good adsorption and separation performance, reduce chemical toxicity, and stability Improved effect

Inactive Publication Date: 2015-04-01
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Magnetic molecular imprinting technology, by adding a magnetic separation carrier in the preparation process of the matrix material, better solves some defects that still exist in the traditional molecular imprinting technology, such as difficult separation of adsorbents, non-reusable materials, and expensive and difficult to obtain raw materials.

Method used

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  • Method for preparing magnetic molecularly-imprinted adsorbent

Examples

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Embodiment 1

[0030] 1. A method for preparing a magnetic molecular imprinting adsorbent by Pickering emulsion polymerization, characterized in that it is carried out according to the following steps:

[0031] (1) Preparation of chitosan nanoparticles

[0032] First, 0.15 g of acetic acid was added dropwise to 100 mL of distilled water. Then add 0.1 g of chitosan into the weak acid solution with a pH value of about 4.2 and keep stirring. The resulting solution was filtered to remove impurities before use. Second, with 0.1 mol L -1 The potassium hydroxide solution is added dropwise to the above-mentioned transparent chitosan solution to change its pH value until the solution becomes milky white, and the pH value of the solution at this time is 7.2. Chitosan nanoparticles are dispersed in the solution, and the obtained chitosan nanoparticle dispersion is used in the preparation of Pickering emulsion later.

[0033] (2) Fe 3 o 4 Preparation of Nanoparticles and Its Hydrophobic Modificati...

Embodiment 2

[0048] 1. A method for preparing a magnetic molecular imprinting adsorbent by Pickering emulsion polymerization, characterized in that it is carried out according to the following steps:

[0049] (1) Preparation of chitosan nanoparticles

[0050] First, 0.2 g of acetic acid was added dropwise to 100 mL of distilled water. Then add 0.2 g of chitosan into the weak acid solution with a pH value of about 3.8 and keep stirring. The resulting solution was filtered to remove impurities before use. Secondly, with 0.1mol L -1 The potassium hydroxide solution is added dropwise to the above-mentioned transparent chitosan solution to change its pH value until the solution becomes milky white, and the pH value of the solution at this time is 7.2. Chitosan nanoparticles are dispersed in the solution, and the obtained chitosan nanoparticle dispersion is used in the following Pickering emulsion preparation.

[0051] (2) Fe 3 o 4 Preparation of Nanoparticles and Its Hydrophobic Modificatio...

Embodiment 3

[0066] 1. A method for preparing a magnetic molecular imprinting adsorbent by Pickering emulsion polymerization, characterized in that it is carried out according to the following steps:

[0067] (1) Preparation of chitosan nanoparticles

[0068] First, 0.25 g of acetic acid was added dropwise to 100 mL of distilled water. Then add 0.3 g of chitosan into the weak acid solution with a pH value of about 3.5 and keep stirring. The resulting solution was filtered to remove impurities before use. Secondly, with 0.1mol L -1 The potassium hydroxide solution is added dropwise to the above-mentioned transparent chitosan solution to change its pH value until the solution becomes milky white, and the pH value of the solution at this time is 7.2. Chitosan nanoparticles are dispersed in the solution, and the obtained chitosan nanoparticle dispersion is used in the following Pickering emulsion preparation.

[0069] (2) Fe 3 o 4 Preparation of nanoparticles and their hydrophobic modifi...

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Abstract

The invention discloses a method for preparing a magnetic molecularly-imprinted adsorbent and belongs to the technical field of preparation of environment-friendly functional materials. The method comprises the following steps of dispersing nanometer chitosan particles serving as stable particles in a solution as a water phase; mixing toluene serving as an oil-phase solvent and a pore-forming agent, methyl methacrylate serving as a functional monomer, ethylene glycol di(methacrylate) serving as a crosslinking agent, 2,2'-azobisisobutyronitrile serving as an initiator and magnetic carrier oil acid-modified nanometer ferriferrous oxide and molecularly-imprinted erythromycin to obtain a mixture serving as an oil phase; mixing the oil phase and the water phase to form a stable Pickering emulsion, preparing magnetically imprinted polymer microspheres by virtue of heat-induced reaction and applying the magnetically imprinted polymer microspheres in the adsorption and separation of erythromycin in an aqueous solution. The product has the imprinted hole and magnetic characteristics and is conducive to specific adsorption of target molecules, the magnetic carrier is conducive to the separation of the adsorbent and internal imprints can prevent the automatic falling and magnetic flux leakage of the target molecules after the target molecules are adsorbed and a better absorption effect is achieved.

Description

technical field [0001] The invention relates to a method for preparing a magnetic molecular imprinted adsorbent by Pickering emulsion polymerization, and belongs to the technical field of preparation of environmental protection functional materials. Background technique [0002] In recent years, antibiotics have been widely used in the treatment of human and animal diseases. At the same time, subtherapeutic doses have been added to animal feed for a long time to prevent diseases and promote animal growth, which has played an important role in ensuring human health and promoting the development of animal husbandry. However, some studies have shown that more than 85% of antibiotics enter the ecological environment in the form of original drugs and metabolites, and after a series of transformations, most of them will eventually exist in natural water bodies. Harmful, induced and spread of various antibiotic-resistant bacteria, a threat to human health, while antibiotics in wate...

Claims

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Application Information

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IPC IPC(8): C08F222/14C08F220/14C08F2/24C08F2/44C08J9/26C08K9/04C08K3/22B01J20/26B01J20/28B01J13/14B01D15/08
Inventor 欧红香陈群汇潘建明黄勇张祯戚雪勇
Owner CHANGZHOU UNIV
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